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arxiv: 2605.20582 · v1 · pith:VTOXV73Mnew · submitted 2026-05-20 · ⚛️ physics.optics

Gold Bipyramids as a Promising Alternative to Gold Nanorods for Analytical and Biomedical Applications

Andrey M. Burov , Sergey V. Zarkov , Arina V. Drozd , Igor V. Borisov , Elena G. Zavyalova , Nikolai G. Khlebtsov This is my paper

Pith reviewed 2026-05-21 03:12 UTC · model grok-4.3

classification ⚛️ physics.optics
keywords gold bipyramidsgold nanorodsSERS enhancementplasmon resonance shiftphotothermal therapyE. coli killingnanoparticle functionalizationoptical quality factor
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The pith

Gold bipyramids deliver approximately three times higher SERS enhancement and larger plasmon shifts than gold nanorods.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper shows that pentagonal gold bipyramids outperform gold nanorods in surface-enhanced Raman scattering by providing a three-fold increase in enhancement factor and a similar increase in the red shift of the plasmon resonance after attaching nitrobenzene molecules. Bipyramids also demonstrate efficient conversion of laser light to heat for killing E. coli bacteria. A reader might care because these improvements could make nanoparticle-based detection and therapy more effective with less material or energy. The results are backed by experiments comparing the two shapes under similar conditions and supported by theoretical estimates of shape-dependent sensitivity to the surrounding medium.

Core claim

Pentagonal gold bipyramids of 75 by 25 nm size with longitudinal plasmon resonance at 753 nm have a significantly higher absorption spectral quality factor than gold nanorods. Functionalization with thiolated nitrobenzene leads to an SERS enhancement factor roughly three times higher for bipyramids, and a red shift in PR about three times greater than for nanorods with the same initial PR. This matches theory predicting greater sensitivity of bipyramid PR to refractive index changes or dielectric shell thickness. The bipyramids also act as efficient thermosensitizers, enabling photothermal killing of E. coli upon laser irradiation at the resonance wavelength.

What carries the argument

The pentagonal bipyramid geometry of gold nanoparticles, which increases the quality factor of the plasmon resonance and amplifies the response to changes in the local dielectric environment for SERS and photothermal effects.

If this is right

  • Bipyramids can be used as more effective platforms for SERS-based chemical analysis.
  • Greater PR sensitivity allows for more responsive optical sensors to molecular binding events.
  • High photothermal efficiency supports their use in targeted bacterial inactivation with laser light.
  • Shape choice becomes a key parameter for optimizing nanoparticle performance in biomedical applications.

Where Pith is reading between the lines

These are editorial extensions of the paper, not claims the author makes directly.

  • The results imply that bipyramid shape could reduce the required laser intensity for photothermal applications compared to nanorods.
  • Similar shape advantages might apply to other plasmonic processes like fluorescence enhancement if tested.
  • Standardization of functionalization conditions is critical to isolate shape effects in future comparisons.

Load-bearing premise

The differences in measured SERS signals and resonance shifts arise primarily from the nanoparticle shape rather than from unequal molecule attachment or particle clustering during the experiments.

What would settle it

Repeating the SERS and PR shift measurements while verifying equal surface coverage of NBT molecules on both bipyramids and nanorods through quantitative assays would confirm or refute the shape-based advantage if the threefold difference persists.

read the original abstract

Pentagonal gold bipyramids with dimensions of 75x25 nm and a longitudinal plasmon resonance (PR) at 753 nm are synthesized. For comparison, gold nanorods with a diameter of 20 nm, lengths ranging from 95 to 50 nm, and longitudinal PR from 945 to 644 nm were synthesized by chemical etching. The samples were characterized by UV-vis spectroscopy and transmission electron microscopy (TEM). It is shown that the absorption spectral quality factor of the bipyramids is significantly higher than that of the nanorods. To compare the nanoparticles as platforms for surface-enhanced Raman scattering (SERS), their surface was functionalized with thiolated nitrobenzene molecules (NBT). It is demonstrated that the SERS enhancement factor for the bipyramids is approximately three times higher than that for the nanorods. The red shift of the bipyramids' PR after functionalization with NBT molecules is also about three times greater than for nanorods with the same PR. This agrees with the theoretical estimate of the bipyramids' PR shift being more sensitive to variations in the refractive index of the external medium or the dielectric shell thickness than that of gold nanospheres and nanorods. The high efficiency of the bipyramids as thermosensitizers for converting laser radiation into heat in photothermal therapy is experimentally and theoretically demonstrated. Effective photothermal killing of E. coli was shown upon irradiation with a laser at the plasmon resonance wavelength using nanobipyramids or nanorods.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

1 major / 3 minor

Summary. The manuscript reports synthesis of pentagonal gold bipyramids (75 × 25 nm, longitudinal PR at 753 nm) and etched gold nanorods (20 nm diameter, lengths 50–95 nm, PR 644–945 nm). UV-vis and TEM characterization indicate a higher absorption quality factor for bipyramids. After NBT thiol functionalization, the SERS enhancement factor is stated to be approximately three times higher and the PR red shift approximately three times larger for bipyramids than for nanorods of matching PR; this is attributed to greater refractive-index sensitivity. Photothermal heating efficiency is shown experimentally and theoretically, with effective laser-induced killing of E. coli demonstrated for both particle types.

Significance. If the comparative claims are substantiated, the work positions gold bipyramids as a shape-optimized alternative to nanorods for SERS sensing and photothermal applications, leveraging sharper tips and facet-dependent field enhancement. The multi-technique experimental validation, including direct demonstration of bacterial photothermal ablation, provides practical biomedical relevance. Credit is due for the side-by-side experimental design and the linkage of observed shifts to theoretical refractive-index sensitivity.

major comments (1)
  1. [SERS and PR-shift comparison results] The headline claim of ~3× higher SERS enhancement factor and ~3× larger PR red shift for bipyramids (abstract and the functionalization/optical characterization results) is load-bearing for the superiority conclusion. This comparison presupposes equivalent NBT surface coverage and colloidal stability between pentagonal bipyramids (exposing {100}/{111} facets with sharp tips) and etched nanorods (roughened sidewalls). No post-functionalization TEM, DLS, zeta-potential, or quantitative adsorption data are reported to confirm that thiol packing density and aggregation state are comparable under the stated incubation conditions; shape-induced differences could alter local field concentration or reporter density by 30–50 %, undermining attribution to intrinsic optical quality factor alone.
minor comments (3)
  1. [Methods] The methods section should specify exact NBT incubation concentrations, times, and washing protocols to enable assessment of reproducibility and surface coverage equivalence.
  2. [Results] Reported numerical factors (SERS EF and PR shifts) lack error bars or replicate statistics, preventing evaluation of whether the factor-of-three differences are statistically significant.
  3. [Figures and supplementary data] Raw UV-vis spectra before/after functionalization and representative post-NBT TEM images would clarify the absence of aggregation and support the spectral quality-factor comparison.

Simulated Author's Rebuttal

1 responses · 0 unresolved

We thank the referee for their thorough review and for recognizing the potential of gold bipyramids as an alternative to nanorods. We address the major comment regarding the SERS and PR-shift comparisons point by point.

read point-by-point responses

  1. Referee: [SERS and PR-shift comparison results] The headline claim of ~3× higher SERS enhancement factor and ~3× larger PR red shift for bipyramids (abstract and the functionalization/optical characterization results) is load-bearing for the superiority conclusion. This comparison presupposes equivalent NBT surface coverage and colloidal stability between pentagonal bipyramids (exposing {100}/{111} facets with sharp tips) and etched nanorods (roughened sidewalls). No post-functionalization TEM, DLS, zeta-potential, or quantitative adsorption data are reported to confirm that thiol packing density and aggregation state are comparable under the stated incubation conditions; shape-induced differences could alter local field concentration or reporter density by 30–50 %, undermining attribution to intrinsic optical quality factor alone.

    Authors: We appreciate the referee pointing out this potential confounding factor. The manuscript reports that both types of nanoparticles were subjected to the same functionalization protocol with NBT thiols. The UV-vis spectra after functionalization do not show broadening or shifts indicative of aggregation for either sample, suggesting comparable colloidal stability. However, we acknowledge that additional post-functionalization characterization would strengthen the claims. In the revised manuscript, we will include DLS and zeta-potential measurements before and after functionalization to confirm stability and surface charge changes are similar. Regarding quantitative adsorption data, we do not have direct measurements such as adsorption isotherms, but the observed PR shifts align with theoretical predictions for refractive index sensitivity based on shape, rather than differences in coverage. We will add a note in the discussion section addressing the assumption of equivalent coverage and its potential impact. This constitutes a partial revision. revision: partial

Circularity Check

0 steps flagged

No significant circularity; all claims rest on direct experimental measurements without derivations or fitted models

full rationale

The paper describes synthesis of pentagonal gold bipyramids and etched nanorods, characterization by UV-vis spectroscopy and TEM, surface functionalization with NBT, and direct experimental measurements of SERS enhancement factors and plasmon resonance red shifts. The key claims (approximately 3× higher SERS EF and 3× greater PR shift for bipyramids) are presented as outcomes of these measurements, with a passing reference to agreement with a general theoretical estimate of refractive-index sensitivity but no equations, models, or parameter fitting performed within the work. No self-definitional steps, fitted inputs renamed as predictions, or load-bearing self-citations appear. This matches the reader's assessment of no derivations or reductions to inputs by construction, confirming the derivation chain is self-contained against external benchmarks.

Axiom & Free-Parameter Ledger

0 free parameters · 0 axioms · 0 invented entities

This is a purely experimental materials paper. No mathematical derivations, fitted constants, or postulated entities are introduced. All performance claims rest on measured spectra and biological assays rather than on any free parameters or axioms.

pith-pipeline@v0.9.0 · 5840 in / 1184 out tokens · 30771 ms · 2026-05-21T03:12:46.804281+00:00 · methodology

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Reference graph

Works this paper leans on

73 extracted references · 61 canonical work pages

  1. [1]

    gold nanorods

    Introduction Anisotropic metal nanoparticles [ 1-5] are actively researched and utilized due to their flexible tunability of the plasmon resonance ( PR) across a broad UV -vis-NIR range [6], significantly larger scattering and absorption cross-sections [7], and enhanced local field effects [8] compared to plasmonic nanospheres. Modern methods of colloidal...

    2025

  2. [2]

    Symbiosis

    Methods 2.1. Theoretical methods In the 2.5D formalism [ 44, 45], the incident and scattered fields are expanded in cylindrical harmonics, and the response of each harmonic is computed separately, leading to significant savings in computational resources in terms of memory and processing time [ 46]. Compared to conventional 3D modeling, the 2.5D formalism...

  3. [3]

    Results and discussion 3.1. Extinction spectra and geometrical parameters of nanoparticles In Figure 1A, solid lines represent the extinction spectra of four nanorod samples with LSPR at 945, 844, 735, and 644 nm (curves 1 –4), as well as the spectrum of gold bipyramids (5); the inset shows a TEM image of the bipyramids. Dashed lines show the spectra of t...

  4. [4]

    A metal sphere with the dielectric permittivity ()metal   in a homogeneous medium with dielectric permittivity ()m : ()av   , 2  . 17

  5. [5]

    For a sphere 1/ 3iLL

    A metal ellipsoid with the dielectric permittivity ()metal   in a homogeneous medium ()m : ()av   , 1 ,, 1a b cL  , where ,,a b cL are the geometrical depolarization factors along the axes ,,abc , ,, 1i i a b c L   . For a sphere 1/ 3iLL

  6. [6]

    It follows from Eq

    A two-layered sphere with a metal core 1()metal   , covered by a dielectric shell of thickness s with a dielectric permittivity 2()s   in a homogeneous medium ()m : 12 12 2 12 12 12 ,1 av f f     2  , (5) where 12 1 2 1 2( ) / ( 2 )       , 3 3 3 3 12 1 2 1 1 / / ( )f a a a a s   . It follows from Eq. (4) that the PR resonanc...

  7. [7]

    In general, we conclude that the theoretical estimates of the angular slope PRS for BPs and nanorods are in qualitative agreement with the experimental data

    for nanorods confirm a lower angular slope than that for BPs. In general, we conclude that the theoretical estimates of the angular slope PRS for BPs and nanorods are in qualitative agreement with the experimental data. Now let's discuss the data for the case where the analyte forms a shell on the surface of a plasmonic nanoparticle. Figure 5A shows the d...

  8. [8]

    or its volume fraction (3, 4). Calculation based on the analytical MEM theory for composite nanoparticles consisting of gold bicones with diamete rs of 15 nm (1, 3) and 30 nm (2, 4), an aspect ratio 3AR  , and a dielectric shell thickness s ranging from zero to 45 nm. The refractive index of the shell is 1.5. (B) Dependence of the plasmon resonance wavel...

  9. [9]

    hot spots

    Conclusions In this work, we have presented experimental and theoretical data comparing several important plasmonic parameters of the most popular anisotropic particles —gold nanorods—and less familiar, yet, in our view, quite promising plasmonic nanoparticles: gold bipyramids. Our goal was to draw researchers' attention to this new class of anisotropic p...

  10. [10]

    Growing anisotropic crystals at the nanoscale

    Liz -Marzán LM, Grzelczak M. Growing anisotropic crystals at the nanoscale . Science 2017;356:1120–21. https//doi.org/10.1126/science.aam8774

    work page doi:10.1126/science.aam8774 2017

  11. [11]

    Anisotropic metal nanoparticles for surface en hanced Raman scattering

    Reguera J, Langer J, Jiménez de Aberasturi D, Liz -Marzán L.M. Anisotropic metal nanoparticles for surface en hanced Raman scattering . Chem Soc Rev 2017 ;46:3866–85. https//doi.org/10.1039/c7cs00158d

    work page doi:10.1039/c7cs00158d 2017

  12. [12]

    Synthesis and functionalization of anisotropic silver nanoparticles

    Zhuo X, Kumar V, Chow TH, Wang J, Liz -Marzán LM. Synthesis and functionalization of anisotropic silver nanoparticles . World Scientific Series in Nanoscience and Na notechnology. 2022;22:349–96. https//doi.org/10.1142/12236-vol2

    work page doi:10.1142/12236-vol2 2022

  13. [13]

    Anisotropic gold nanoparticles: A survey of recent synthetic methodologies

    Ortiz -Castillo JE, Gallo -Villanueva RC, Madou MJ, Perez -Gonzalez VH. Anisotropic gold nanoparticles: A survey of recent synthetic methodologies . Coord Chem Rev 2020 ;425:213489. https//doi.org/10.1016/j.ccr.2020.213489

    work page doi:10.1016/j.ccr.2020.213489 2020

  14. [14]

    Colloidal synthesis of metal nanocrystals: From asymmetrical growth to symmetry breaking

    Nguyen QN, Wang C, Shang Y, Janssen A, Xia Y. Colloidal synthesis of metal nanocrystals: From asymmetrical growth to symmetry breaking . Chem Rev 2023 ;123:3693–760. https//doi.org/10.1021/acs.chemrev.2c00468

    work page doi:10.1021/acs.chemrev.2c00468 2023

  15. [15]

    Synthesis and plasmonic tuning of gold and gold–silver nanoparticles

    Khlebtsov NG, Dykman LA, Khlebtsov BN. Synthesis and plasmonic tuning of gold and gold–silver nanoparticles . Russ Chem Rev 2022 ;91:RCR5058. https//doi.org/10.57634/RCR5058

    work page doi:10.57634/rcr5058 2022

  16. [16]

    Calculated absorption and scattering properties of gold nanoparticles of different size, shape, and composition: Applications in biological imaging and biomedicine

    Jain PK, Lee KS, El -Sayed IH, El-Sayed MA. Calculated absorption and scattering properties of gold nanoparticles of different size, shape, and composition: Applications in biological imaging and biomedicine. J Phys Chem B 2006;110:7238–48. https://doi.org/10.1021/jp057170o

    work page doi:10.1021/jp057170o 2006

  17. [17]

    Quantifying the ultimate limit of plasmonic near - field enhancement

    Lu Z, Ji J, Ye H , Zhang H, Zhang S, Xu H . Quantifying the ultimate limit of plasmonic near - field enhancement. Nat Commun 2024;15:8803. https://doi.org/10.1038/s41467-024-53210-8

    work page doi:10.1038/s41467-024-53210-8 2024

  18. [18]

    Liz -Marzán L. (Ed.). Colloidal Synthesis of Plasmonic Nanometals . New York: Jenny Stanford Publishing; 2021. 29

    2021

  19. [19]

    Gold nanocages: From synthesis to theranostic applications

    Xia Y, Li W, Cobley C M, Chen J, Xia X, Zhang Q, Yang M, Cho EC, Brown PK. Gold nanocages: From synthesis to theranostic applications . Acc Chem Res 2011 ;44:914–24. https://doi.org/10.1021/ar200061q

    work page doi:10.1021/ar200061q 2011

  20. [20]

    Synthesis and optical properties of poly(N - isopropylacrylamide) nanogel containing silver nanoparticles

    Panfilova EV, Khlebtsov BN, Khlebtsov NG. Synthesis and optical properties of poly(N - isopropylacrylamide) nanogel containing silver nanoparticles . Colloid J 2013 ;75:333–38. https://doi.org/10.1134/S1061933X13030149

    work page doi:10.1134/s1061933x13030149 2013

  21. [21]

    Engineering plasmonic Au nanostars: Enhance d plasmonic properties, preparation and biomedical application

    Zhang F, Xu L, Wang Y, Wang P. Engineering plasmonic Au nanostars: Enhance d plasmonic properties, preparation and biomedical application . Materials Today Bio 2025;33:102022. https://doi.org/10.1016/j.mtbio.2025.102022

    work page doi:10.1016/j.mtbio.2025.102022 2025

  22. [22]

    Gold triangular nanoprisms: Anisotropic plasmonic materials with unique structures an d properties

    Wang J, Fang W, Liu H. Gold triangular nanoprisms: Anisotropic plasmonic materials with unique structures an d properties . ChemPlusChem 2023 ;88:e202200464. https://doi.org/10.1002/cplu.202200464

    work page doi:10.1002/cplu.202200464 2023

  23. [23]

    Plate-like colloidal metal nanoparticles

    Scarabelli L, Sun M, Zhuo X , Yoo S, Millstone JE, Jones MR, Liz -Marzán LM. Plate-like colloidal metal nanoparticles . Chem Rev 2023 ;123:3493–542. https://doi.org/10.1021/acs.chemrev.3c00033

    work page doi:10.1021/acs.chemrev.3c00033 2023

  24. [24]

    Rational design of ultra -bright SERS probes with embedded reporters for bioimaging and photothermal therapy

    Jin X, Khlebtsov BN, Khanadeev VA, Khlebtsov NG, Ye J. Rational design of ultra -bright SERS probes with embedded reporters for bioimaging and photothermal therapy . ACS Appl Mater Interfaces 2017;9:30387–97. https://doi.org/10.1021/acsami.7b08733

    work page doi:10.1021/acsami.7b08733 2017

  25. [25]

    Gap -enhanced Raman tags: Fabrication, optical properties, and theranostic applications

    Khlebtsov NG, Lin L, Khlebtsov BN, Ye J. Gap -enhanced Raman tags: Fabrication, optical properties, and theranostic applications . Theranostics 2020 ;10:2067–94. https://doi.org/10.7150/thno.39968

    work page doi:10.7150/thno.39968 2020

  26. [26]

    Gold nanorods: The most versatile plasmonic nanoparticles

    Zheng J, Cheng X, Zhang H , Bai X, Ai R, Shao L, Wang J. Gold nanorods: The most versatile plasmonic nanoparticles . Chem Rev 2021 ;121:13342–453. https://doi.org/10.1021/acs.chemrev.1c00422. 30

    work page doi:10.1021/acs.chemrev.1c00422 2021

  27. [27]

    Functional gold nanorods: Synthesis, self -assembly, and sen sing applications

    Vigderman L, Khanal BP, Zubarev ER. Functional gold nanorods: Synthesis, self -assembly, and sen sing applications . Adv Mater 2012 ;24:4811–41. https://doi.org/10.1002/adma.201201690

    work page doi:10.1002/adma.201201690 2012

  28. [28]

    The quest for shape control: A history of gold nanorod synthesis

    Lohse SE, Murphy CJ. The quest for shape control: A history of gold nanorod synthesis . Chem Mater 2013;25:1250–61. https://doi.org/10.1021/cm303708p

    work page doi:10.1021/cm303708p 2013

  29. [29]

    Gold nanorod synthesis with small thiolated molecules

    Requejo KI, Liopo AV, Zubarev ER. Gold nanorod synthesis with small thiolated molecules. Langmuir 2020;36:3758–3769. https://doi.org/10.1021/acs.langmuir.0c00302

    work page doi:10.1021/acs.langmuir.0c00302 2020

  30. [30]

    Noble metal nanoparticles in biomedical thermoplasmonics

    Dement’eva OV, Kartseva ME. Noble metal nanoparticles in biomedical thermoplasmonics . Colloid J 2023;85:500–19. https://doi.org/10.1134/S1061933X23700187

    work page doi:10.1134/s1061933x23700187 2023

  31. [31]

    Gold nanobipyramids: An emerging and versatile type of plasmonic nanoparticles

    Chow TH, Li N, Bai X , Zhuo X, Shao L, Wang J. Gold nanobipyramids: An emerging and versatile type of plasmonic nanoparticles . Acc Chem Res 2019 ;52:2136–46. https://doi.org/10.1021/acs.accounts.9b00230

    work page doi:10.1021/acs.accounts.9b00230 2019

  32. [33]

    Size effect on photothermal heating ability of gold bipyramids

    Naik AM, Sánchez -Iglesias A, Montaño -Priede JL , D'souza NM, Sancho -Parramon J, Mezzasalma SA, Rao A, Grzelczak M. Size effect on photothermal heating ability of gold bipyramids. Adv Opt Mater 2025;13:e01006. https://doi.org/10.1002/adom.202501006

    work page doi:10.1002/adom.202501006 2025

  33. [34]

    Advancing thermoplasmonic sensing: gold nanobipyramids for enhanced light -to-heat conversion

    Campu A, Brezestean IA, Tripon S -C, Aştilean S, Foc san M. Advancing thermoplasmonic sensing: gold nanobipyramids for enhanced light -to-heat conversion . J Mater Chem C 2025;13:1637–86. https://doi.org/10.1039/d5tc01502b

    work page doi:10.1039/d5tc01502b 2025

  34. [35]

    31 Bipyramidal gold nanoparticles-assisted plasmonic photothermal therapy for ocular applications

    Alba -Molina D., Cano M., Blanco -Blanco M , Ortega-Llamas L, Jiménez -Gómez Y, González-López A, Pérez -Perdomo M, Camacho L, Giner -Casares JJ, Gonźalez -Andrades M. 31 Bipyramidal gold nanoparticles-assisted plasmonic photothermal therapy for ocular applications. J Mater Chem B 2025;13:3000–10. https://doi.org/10.1039/d4tb02688h

    work page doi:10.1039/d4tb02688h 2025

  35. [36]

    Origin of the rich polymorphism of gold in penta -twinned nanoparticles

    Martín -Sánchez C, Sánchez -Iglesias A, Barreda -Argüeso JA , Itiè J -P, Chauvigne P, Liz - Marzán LM, Rodriguez F. Origin of the rich polymorphism of gold in penta -twinned nanoparticles. Nano Lett 2025;25:3588–96. https://doi.org/10.1021/acs.nanolett.4c06473

    work page doi:10.1021/acs.nanolett.4c06473 2025

  36. [37]

    Shape - and size -dependent refractive index sensitivity of gold nanoparticles

    Chen H, Kou X, Yang Z, Ni W, Wang J. Shape - and size -dependent refractive index sensitivity of gold nanoparticles. Langmuir 2008;24:5233–37. https://doi.org/10.1021/la800305j

    work page doi:10.1021/la800305j 2008

  37. [38]

    Review of fiber -optic localized surface plasmon resonance sensors: Geometries, fabrication technologies, and bio-applications

    Lu M, Wang C, Fan R , Lin M, Guang J, Peng W. Review of fiber -optic localized surface plasmon resonance sensors: Geometries, fabrication technologies, and bio-applications. Photonic Sens 2024;14:240202. https://doi.org/10.1007/s13320-024-0709-1

    work page doi:10.1007/s13320-024-0709-1 2024

  38. [39]

    Facile growth of high -yield gold nanobipyramids induced by chloroplatinic acid for high refractive index sensing properties

    Fang C, Zhao G, Xiao Y, Zhao J, Zhang Z, Geng B. Facile growth of high -yield gold nanobipyramids induced by chloroplatinic acid for high refractive index sensing properties . Sci Rep 2016;6:36706. https://doi.org/10.1038/srep36706

    work page doi:10.1038/srep36706 2016

  39. [40]

    Bipyramid-templated synthesis of monodisperse anisotropic gold nanocrystals

    Lee J-H, Gibson KJ, Chen G, Weizmann Y. Bipyramid-templated synthesis of monodisperse anisotropic gold nanocrystals. Nat Commun 2015;6:7571. https://doi.org/10.1038/ncomms8571

    work page doi:10.1038/ncomms8571 2015

  40. [41]

    From gold nanobipyramids to nanojavelins for a precise tuning of the plasmon resonance to the infrared wavele ngths: Experimental and theoretical aspects

    Château D, Liotta A, Vadcard F , Navarro JRG, Chaput F, Lermé J, Lerouge F, Parola S. From gold nanobipyramids to nanojavelins for a precise tuning of the plasmon resonance to the infrared wavele ngths: Experimental and theoretical aspects . Nanoscale 2015 ;7:1934–43. https://doi.org/10.1039/c4nr06323f

    work page doi:10.1039/c4nr06323f 2015

  41. [42]

    Beyond the concentration limitation in the synthesis of nanobipyramids and other pentatwinned gold nanostructures

    Château D, Désert A, Lerouge F , Landaburu G, Santucci S, Parola S. Beyond the concentration limitation in the synthesis of nanobipyramids and other pentatwinned gold nanostructures. ACS Appl Mater Interfaces 2019 ;11:39068–76. https://doi.org/10.1021/acsami.9b12973. 32

    work page doi:10.1021/acsami.9b12973 2019

  42. [43]

    Optimization of the surfactant ratio in the formation of penta -twinned seeds for precision synthesis of gold nanobipyramids with tunable plasmon resonances

    Nguyen AL, Griffin QJ, Wang A, Sahai S , Jing H. Optimization of the surfactant ratio in the formation of penta -twinned seeds for precision synthesis of gold nanobipyramids with tunable plasmon resonances . J Phys Chem C 2025 ;129:4303–12. https://doi.org/10.1021/acs.jpcc.4c08818A

    work page doi:10.1021/acs.jpcc.4c08818a 2025

  43. [44]

    Expanding chemical space in the synthesis of gold bipyramids

    Sánchez -Iglesias A, Grzelczak M. Expanding chemical space in the synthesis of gold bipyramids. Small 2025;21:2407735. https://doi.org/10.1002/smll.202407735

    work page doi:10.1002/smll.202407735 2025

  44. [45]

    Accelerated design of gold nanoparticles with enhanced plasmonic performance

    Montaño-Priede JL, Rao A, Sánchez -Iglesias A, Grzelczak M. Accelerated design of gold nanoparticles with enhanced plasmonic performance . Sci Adv 2025 ;11:eadx2299. https://doi.org/10.1126/sciadv.adx2299

    work page doi:10.1126/sciadv.adx2299 2025

  45. [46]

    Review of synthesis and functionalization of gold nanobipyramids

    Salsabiila N, Morsin M, Nafisah S, Razali NL, Mahmud F, Tukiran Z, Omar MA. Review of synthesis and functionalization of gold nanobipyramids . J Adv Re. Appl Mech 2025 ;127:100–

    2025

  46. [47]

    https://doi.org/10.37934/aram.127.1.100119

    work page doi:10.37934/aram.127.1.100119

  47. [48]

    Simulating plasmon resonances of gold nanoparticles with bipyramidal shapes by boundary element methods

    Marcheselli J, C hâteau D, Lerouge F , Baldeck P, Andraud C, Parola S, Baroni S, Corni S, Garavelli M, Rivalta I. Simulating plasmon resonances of gold nanoparticles with bipyramidal shapes by boundary element methods . J Chem Theory Comput 2020 ;16:3807–15. https://doi.org/10.1021/acs.jctc.0c00269

    work page doi:10.1021/acs.jctc.0c00269 2020

  48. [49]

    Quantifying shape transition in anisotropic plasmonic nanoparticles through geometric inversion

    Montaño-Priede JL, Sánchez-Iglesias A, Mezzasalma SA, Sancho-Parramon J, Grzelczak M. Quantifying shape transition in anisotropic plasmonic nanoparticles through geometric inversion. application to gold bipyramids . J Phys Chem Lett 2024 ;15:3914–22. https://doi.org/10.1021/acs.jpclett.4c00582

    work page doi:10.1021/acs.jpclett.4c00582 2024

  49. [50]

    Combining the modal expansion and dipole equivalence methods for coated plasmonic particles of various shapes

    Khlebtsov NG, Zarkov SV. Combining the modal expansion and dipole equivalence methods for coated plasmonic particles of various shapes . J Phys Chem C 2025 ;129:10958–74. https://doi.org/10.1021/acs.jpcc.5c01652. 33 41 Li Q , Zhuo XL, Li S, Ruan QF, Xu QH, Wang JF. Production of monodisperse gold nanobipyramids with number percentages approaching 100% and...

    work page doi:10.1021/acs.jpcc.5c01652 2025

  50. [51]

    Tuning of plasmon resonance of gold nanorods by controlled etching

    Khanadeev VA, Khlebtsov NG, Burov AM, Khlebtsov BN. Tuning of plasmon resonance of gold nanorods by controlled etching . Colloid J 2015 ;77:652–60. https://doi.org/10.1134/S1061933X15050117

    work page doi:10.1134/s1061933x15050117 2015

  51. [52]

    Far-field analysis of axially symmetric three-dimensional directional cloaks

    Ciracì C, Urzhumov Y, Smith DR. Far-field analysis of axially symmetric three-dimensional directional cloaks. Opt Express 2013;21:9397–406. https://doi.org/10.1364/OE.21.009397

    work page doi:10.1364/oe.21.009397 2013

  52. [53]

    Analytical modeling of coated plasmonic particles

    Khlebtsov NG, Zarkov SV. Analytical modeling of coated plasmonic particles. J Phys Chem. C 2024;128:15029–40. https://doi.org/10.1021/acs.jpcc.4c03126

    work page doi:10.1021/acs.jpcc.4c03126 2024

  53. [54]

    Fast simulation of light scattering and harmonic generation in axially symmetric structures in COMS OL

    Gladyshev S, Pashina O, Proskurin A , Nikolaeva A, Sadrieva Z, Petrov M, Bogdanov A, Frizyuk K. Fast simulation of light scattering and harmonic generation in axially symmetric structures in COMS OL. ACS Photoics 2024 ;11:404–18. https://doi.org/10.1021/acsphotonics.3c01166

    work page doi:10.1021/acsphotonics.3c01166 2024

  54. [55]

    A novel concept of two - component dielectric function for gold nanostars: Theoretical modelling and experimental verification

    Khlebtsov NG, Zarkov SV, Khanadeev VA, Avetisyan YA. A novel concept of two - component dielectric function for gold nanostars: Theoretical modelling and experimental verification. Nanoscale 2020;12:19963–81. https://doi.org/10.1039/d0nr02531c

    work page doi:10.1039/d0nr02531c 2020

  55. [56]

    Optical dielectric function of gold

    Olmon R L , Slovick B , Johnson TW , Shelton D, Oh S -H, Boreman GD, Raschke MB. Optical dielectric function of gold . Phys Rev B 2012 ;86:235147. https://doi.org/10.1103/PhysRevB.86.235147. 34

    work page doi:10.1103/physrevb.86.235147 2012

  56. [57]

    Contributions from radiation damping and surface scattering to the linewidth of the longitudinal plasmon band of gold nanorods: A single particle study

    Novo C, Gomez D, Perez -Juste J, Zhang Z, Petrova H, Reismann M, Mulvaney P, Hartland GV. Contributions from radiation damping and surface scattering to the linewidth of the longitudinal plasmon band of gold nanorods: A single particle study . Phys Chem Chem Phys 2006;8:3540–46. https://doi.org/10.1039/B604856K

    work page doi:10.1039/b604856k 2006

  57. [58]

    A new T -matrix solvable model for nanorods: TEM -based ensemble simulations supported by experiments

    Khlebtsov B , Khanadeev V, Pylaev T, Khlebtsov N. A new T -matrix solvable model for nanorods: TEM -based ensemble simulations supported by experiments . J Phys Chem C 2011;115:6317–23. https://doi.org/10.1021/jp2000078

    work page doi:10.1021/jp2000078 2011

  58. [59]

    Surfactant layers on gold nanorods

    Mosquera J, Wang D, Bals S, Liz -Marzán LM. Surfactant layers on gold nanorods . Acc Chem Res 2023;56:1204–12. https://doi.org/10.1021/acs.accounts.3c00101

    work page doi:10.1021/acs.accounts.3c00101 2023

  59. [60]

    Universal analytical modeling of plasmonic nanoparticles

    Yu R, Liz -Marzán LM, García de Abajo F J. Universal analytical modeling of plasmonic nanoparticles. Chem Soc Rev 2017;46:6710–24. https://doi.org/10.1039/C6CS00919K

    work page doi:10.1039/c6cs00919k 2017

  60. [61]

    T -matrix method in plasmonics: An overview

    Khlebtsov NG. T -matrix method in plasmonics: An overview . J Quant Spectrosc Radiat Transfer 2013;123:184–217. https://doi.org/10.1016/j.jqsrt.2012.12.027

    work page doi:10.1016/j.jqsrt.2012.12.027 2013

  61. [62]

    High -yield synthesis of gold nanorods with longitudinal SPR peak greater than 1200 nm using hydroquinone as a reducing agent

    Vigderman L, Zubarev ER. High -yield synthesis of gold nanorods with longitudinal SPR peak greater than 1200 nm using hydroquinone as a reducing agent . Chem Mater 2013;25:1450–

    2013

  62. [63]

    https://doi.org/10.1021/cm303661d

    work page doi:10.1021/cm303661d

  63. [64]

    Surface -enhanced Raman scattering from Au nanorods, nanotriangles, and nanostars with tuned plasmon resonances

    Khlebtsov BN, Burov AM, Zarkov SV, Khlebtsov NG. Surface -enhanced Raman scattering from Au nanorods, nanotriangles, and nanostars with tuned plasmon resonances . Phys Chem Chem Phys 2023;25:30903–13. https://doi.org/10.1039/d3cp04541b

    work page doi:10.1039/d3cp04541b 2023

  64. [65]

    Methods for assessing the viability of cells cultured in vitro in 2D and 3D structures

    Eremeev AV, P ikina AS, Vladimirova TV, Bogomazova AN. Methods for assessing the viability of cells cultured in vitro in 2D and 3D structures . Genes Cells 2023 ;18:5-21. https://doi.org/10.23868/gc312198. 35

    work page doi:10.23868/gc312198 2023

  65. [66]

    Universal determination of gold concentration in colloids with UV -vis spectroscopy

    Khlebtsov NG, Khlebtsov BN, Kryuchkova EV, Zarkov SV, Burov AM. Universal determination of gold concentration in colloids with UV -vis spectroscopy . J Phys Chem C 2022;126:19268–76. https://doi.org/10.1021/acs.jpcc.2c05843

    work page doi:10.1021/acs.jpcc.2c05843 2022

  66. [67]

    Reexamination of surface-enhanced Raman scattering from gold nanorods as a function of aspect ratio and shape

    Khlebtsov BN, Khanadeev VA, Burov AM, Le Ru EC, Khlebtsov NG. Reexamination of surface-enhanced Raman scattering from gold nanorods as a function of aspect ratio and shape . J Phys Chem C 2020;124:10647–58. https://doi.org/10.1021/acs.jpcc.0c00991

    work page doi:10.1021/acs.jpcc.0c00991 2020

  67. [68]

    Localized surface plasmon resonance senso rs

    Mayer KM, Hafner JH. Localized surface plasmon resonance senso rs. Chem Rev 2011;111:3828–57. https://doi.org/10.1021/cr100313v

    work page doi:10.1021/cr100313v 2011

  68. [69]

    Sensitivity of metal nanoparticle surface plasmon resonance to the dielectric environment

    Miller MM, Lazarides AA. Sensitivity of metal nanoparticle surface plasmon resonance to the dielectric environment . J Phys Chem B 2005 ;109:21556–65. https://doi.org/10.1021/jp054227y

    work page doi:10.1021/jp054227y 2005

  69. [70]

    Shape- and size - dependent refractive index sensing and SERS performance of gold nanoplates

    Luo X, Qiao L, Xia Z, Yu J, Wang X, Huang J, Shu C, Wu C, He Y. Shape- and size - dependent refractive index sensing and SERS performance of gold nanoplates . Langmuir 2022;38:6454–63. https://doi.org/10.1021/acs.langmuir.2c00663

    work page doi:10.1021/acs.langmuir.2c00663 2022

  70. [71]

    Optics and biophotonics of nanoparticles with a plasmon resonance

    Khlebtsov NG. Optics and biophotonics of nanoparticles with a plasmon resonance . Quant Electron 2008;38:524–29. https://doi.org/10.1070/QE2008v038n06ABEH013829

    work page doi:10.1070/qe2008v038n06abeh013829 2008

  71. [72]

    Coupled plasmon resonances in monolayers of metal nanoparticles and nanoshells

    Khlebtsov BN, Khanadeev VA, Ye J, Mackowsk i, DW, Borghs G, Khlebtsov NG. Coupled plasmon resonances in monolayers of metal nanoparticles and nanoshells. Phys Rev B 2008; 77:035440. https://doi.org/10.1103/PhysRevB.77.035440

    work page doi:10.1103/physrevb.77.035440 2008

  72. [73]

    Two -layer model of colloidal gold bioconjugates and its application to the optimization of nanosensors

    Khlebtsov NG, Dykman LA, Bogatyrev VA, Khlebtsov BN. Two -layer model of colloidal gold bioconjugates and its application to the optimization of nanosensors. Colloid J 2003;65:508–18. https://doi.org/10.1023/A:1025137322720. 36

    work page doi:10.1023/a:1025137322720 2003

  73. [74]

    Determination of the size, concentration, and refractive index of silica nanoparticles from turbidity spectra

    Khlebtsov BN, Khanadeev VA, Khlebtsov NG. Determination of the size, concentration, and refractive index of silica nanoparticles from turbidity spectra . Langmuir 2008 ;24:8964–70. https://doi.org/10.1021/la8010053. 37 Highlights  FWHM of gold nanobipyramids (AuBPs) is half of that for nanorods  The SERS enhancement factor of AuBPs is three times higher...

    work page doi:10.1021/la8010053 2008