The paper attributes the observed tetramer and octamer mass peaks to AgBr clusters carrying CH2CH3 fragments, and presents a fitted quantum-confinement curve as proof of a lambda-shaped energy gap behavior.
Quantum Confinement Effects for Semiconductor Clusters in the Molecular Regime
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abstract
Based on the observed absorption spectral band shifts, the growth process of the semiconductor clusters was divided into two phenomenological regimes: The "molecular regime" that is associated with the band blue shift as the size of cluster increases and the "crystallite regime" that is associated with the band red shift as the size of cluster increases. We show that in the molecular regime, the band blue shift associated with cluster growth can be understood by a model that assume electrons are confined to a spherical potential well and the clusters are made of some basic units. A formula is given for the lowest excited electronic state energy. This expression contains an electron-hole-pair (EHP) delocalization constant as an adjustable parameter which, however, can be anchored to a definite value through the known transition energy at the spectra turn-around point. The stability of clusters is characterized by a function that can be calculated by the eigenvalues of the Hamiltonian of the model.
fields
physics.chem-ph 1years
2019 1verdicts
REJECT 1representative citing papers
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Studies of Bi-layers Growth Mechanism of Silver Bromide Molecular Clusters Prepared Via Electroporation of Vesicles and Quantum Confinement Effects Applications of Molecular Clusters
The paper attributes the observed tetramer and octamer mass peaks to AgBr clusters carrying CH2CH3 fragments, and presents a fitted quantum-confinement curve as proof of a lambda-shaped energy gap behavior.