{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:MTMSQPYUVIIHX3U3Q6U2LWOWSP","short_pith_number":"pith:MTMSQPYU","canonical_record":{"source":{"id":"2410.05456","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2024-10-07T19:40:42Z","cross_cats_sorted":[],"title_canon_sha256":"d9ad2c7bf5a46956b1ae9f83b250cf5b5186c9b86bc45f779d1d33303692e1ba","abstract_canon_sha256":"3bb5b353a391601c187814ace25088a3a0eb9fa4f698f0142c0cc2e72f81e3ef"},"schema_version":"1.0"},"canonical_sha256":"64d9283f14aa107bee9b87a9a5d9d693d818ab7dcfb4b302350db17c28a8d912","source":{"kind":"arxiv","id":"2410.05456","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2410.05456","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"arxiv_version","alias_value":"2410.05456v1","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2410.05456","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"pith_short_12","alias_value":"MTMSQPYUVIIH","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"pith_short_16","alias_value":"MTMSQPYUVIIHX3U3","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"pith_short_8","alias_value":"MTMSQPYU","created_at":"2026-07-05T09:17:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:MTMSQPYUVIIHX3U3Q6U2LWOWSP","target":"record","payload":{"canonical_record":{"source":{"id":"2410.05456","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2024-10-07T19:40:42Z","cross_cats_sorted":[],"title_canon_sha256":"d9ad2c7bf5a46956b1ae9f83b250cf5b5186c9b86bc45f779d1d33303692e1ba","abstract_canon_sha256":"3bb5b353a391601c187814ace25088a3a0eb9fa4f698f0142c0cc2e72f81e3ef"},"schema_version":"1.0"},"canonical_sha256":"64d9283f14aa107bee9b87a9a5d9d693d818ab7dcfb4b302350db17c28a8d912","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T09:17:19.598156Z","signature_b64":"aoAxfXgG7nt1twSFygTEzurtXMWqPKyMs4u5MpFU8j0XIxKtISiQBmLFmb2yvDdP0DHtcC2gaUKYxpGiAQmkDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"64d9283f14aa107bee9b87a9a5d9d693d818ab7dcfb4b302350db17c28a8d912","last_reissued_at":"2026-07-05T09:17:19.597512Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T09:17:19.597512Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2410.05456","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:17:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HTe7gh/H+px3h/8a5/xx8kaVKfX0G8hSL8xStPxpilPw2GaRxi9APO2lomUdKczvZeU3M9rIeSxCrA+CSmbsAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T23:42:02.458128Z"},"content_sha256":"1294fe644736d7bb354e061231ab83fff3d6aa317cf53bef31e2a4bccd065db8","schema_version":"1.0","event_id":"sha256:1294fe644736d7bb354e061231ab83fff3d6aa317cf53bef31e2a4bccd065db8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:MTMSQPYUVIIHX3U3Q6U2LWOWSP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effect of Grafting Density on the Two-dimensional Assembly of Nanoparticles","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"Binay P. Nayak, David Vaknin, Honghu Zhang, Hyeong Jin Kim, James Ethan Batey, Surya K. Mallapragada, Wei Bu, Wenjie Wang","submitted_at":"2024-10-07T19:40:42Z","abstract_excerpt":"Employing grazing-incidence small-angle X-ray scattering (GISAXS) and X-ray reflectivity (XRR), we demonstrate that films composed of polyethylene glycol (PEG)-grafted silver nanoparticles (AgNP) and gold nanoparticles (AuNP), as well as their binary mixtures, form highly stable hexagonal structures at the vapor-liquid interface. These nanoparticles exhibit remarkable stability under varying environmental conditions, including changes in pH, mixing concentration, and PEG chain length. Short-chain PEG grafting produces dense, well-ordered films, while longer chains produce more complex, less de"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2410.05456","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2410.05456/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T09:17:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u41YSs53bd69jh3uEHZI3AUrvFZOXDXSUKN43BRTyfEz3GNQzjQpuG1JpoLVa2/h0YwmCRyRLmyuFqr9oVK9Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-25T23:42:02.458518Z"},"content_sha256":"66b8333cede22772a8d6a1f78c049ef83c1030dc34f5b98d86a28d24fb8f02c3","schema_version":"1.0","event_id":"sha256:66b8333cede22772a8d6a1f78c049ef83c1030dc34f5b98d86a28d24fb8f02c3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MTMSQPYUVIIHX3U3Q6U2LWOWSP/bundle.json","state_url":"https://pith.science/pith/MTMSQPYUVIIHX3U3Q6U2LWOWSP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MTMSQPYUVIIHX3U3Q6U2LWOWSP/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-25T23:42:02Z","links":{"resolver":"https://pith.science/pith/MTMSQPYUVIIHX3U3Q6U2LWOWSP","bundle":"https://pith.science/pith/MTMSQPYUVIIHX3U3Q6U2LWOWSP/bundle.json","state":"https://pith.science/pith/MTMSQPYUVIIHX3U3Q6U2LWOWSP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MTMSQPYUVIIHX3U3Q6U2LWOWSP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:MTMSQPYUVIIHX3U3Q6U2LWOWSP","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"3bb5b353a391601c187814ace25088a3a0eb9fa4f698f0142c0cc2e72f81e3ef","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2024-10-07T19:40:42Z","title_canon_sha256":"d9ad2c7bf5a46956b1ae9f83b250cf5b5186c9b86bc45f779d1d33303692e1ba"},"schema_version":"1.0","source":{"id":"2410.05456","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2410.05456","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"arxiv_version","alias_value":"2410.05456v1","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2410.05456","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"pith_short_12","alias_value":"MTMSQPYUVIIH","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"pith_short_16","alias_value":"MTMSQPYUVIIHX3U3","created_at":"2026-07-05T09:17:19Z"},{"alias_kind":"pith_short_8","alias_value":"MTMSQPYU","created_at":"2026-07-05T09:17:19Z"}],"graph_snapshots":[{"event_id":"sha256:66b8333cede22772a8d6a1f78c049ef83c1030dc34f5b98d86a28d24fb8f02c3","target":"graph","created_at":"2026-07-05T09:17:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2410.05456/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Employing grazing-incidence small-angle X-ray scattering (GISAXS) and X-ray reflectivity (XRR), we demonstrate that films composed of polyethylene glycol (PEG)-grafted silver nanoparticles (AgNP) and gold nanoparticles (AuNP), as well as their binary mixtures, form highly stable hexagonal structures at the vapor-liquid interface. These nanoparticles exhibit remarkable stability under varying environmental conditions, including changes in pH, mixing concentration, and PEG chain length. Short-chain PEG grafting produces dense, well-ordered films, while longer chains produce more complex, less de","authors_text":"Binay P. Nayak, David Vaknin, Honghu Zhang, Hyeong Jin Kim, James Ethan Batey, Surya K. Mallapragada, Wei Bu, Wenjie Wang","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2024-10-07T19:40:42Z","title":"Effect of Grafting Density on the Two-dimensional Assembly of Nanoparticles"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2410.05456","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:1294fe644736d7bb354e061231ab83fff3d6aa317cf53bef31e2a4bccd065db8","target":"record","created_at":"2026-07-05T09:17:19Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"3bb5b353a391601c187814ace25088a3a0eb9fa4f698f0142c0cc2e72f81e3ef","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.soft","submitted_at":"2024-10-07T19:40:42Z","title_canon_sha256":"d9ad2c7bf5a46956b1ae9f83b250cf5b5186c9b86bc45f779d1d33303692e1ba"},"schema_version":"1.0","source":{"id":"2410.05456","kind":"arxiv","version":1}},"canonical_sha256":"64d9283f14aa107bee9b87a9a5d9d693d818ab7dcfb4b302350db17c28a8d912","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"64d9283f14aa107bee9b87a9a5d9d693d818ab7dcfb4b302350db17c28a8d912","first_computed_at":"2026-07-05T09:17:19.597512Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T09:17:19.597512Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aoAxfXgG7nt1twSFygTEzurtXMWqPKyMs4u5MpFU8j0XIxKtISiQBmLFmb2yvDdP0DHtcC2gaUKYxpGiAQmkDw==","signature_status":"signed_v1","signed_at":"2026-07-05T09:17:19.598156Z","signed_message":"canonical_sha256_bytes"},"source_id":"2410.05456","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1294fe644736d7bb354e061231ab83fff3d6aa317cf53bef31e2a4bccd065db8","sha256:66b8333cede22772a8d6a1f78c049ef83c1030dc34f5b98d86a28d24fb8f02c3"],"state_sha256":"3387f5c22b695aae00dbde5dec4a17f646a9eabbdac3173d51e8875a67e0a5f4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3U/zMhLuzdEBiX3yHliggUJrX4aZk3t+E3VX824/GCsa2GWwibcQjUFDhsnbSqnBfuJKrdmXPueel2uhHWx3AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-25T23:42:02.460962Z","bundle_sha256":"b14dc02dba9e9d374777ac07629799b219afb7fdb35d8e7d79c42f59acdda234"}}