{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:BXGMS4ODPJEQ3D5AMC2U7EOJVY","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":"6fc478674c8f77306607acd6c6375af6b8ef84bced6d400e187bda7b032d9875","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-11-29T05:26:34Z","title_canon_sha256":"37e5ada08f66efccf333c165bdac28afe4878a0f6314e60b290a7510a981f3f0"},"schema_version":"1.0","source":{"id":"1111.6697","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1111.6697","created_at":"2026-05-18T02:25:11Z"},{"alias_kind":"arxiv_version","alias_value":"1111.6697v2","created_at":"2026-05-18T02:25:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1111.6697","created_at":"2026-05-18T02:25:11Z"},{"alias_kind":"pith_short_12","alias_value":"BXGMS4ODPJEQ","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"BXGMS4ODPJEQ3D5A","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"BXGMS4OD","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:3ecf797a9730e7148fff71ec722ebc3a1f48e3730a54db7c6cd2f9747ff3d996","target":"graph","created_at":"2026-05-18T02:25:11Z","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"},"paper":{"abstract_excerpt":"The thousandfold increase in data-collection speed enabled by aberration-corrected optics allows us to overcome an electron microscopy paradox - how to obtain atomic-resolution chemical structure in individual nanoparticles, yet record a statistically significant sample from an inhomogeneous population. This allowed us to map hundreds of Pt-Co nanoparticles to show atomic-scale elemental distributions across different stages of the catalyst aging in a proton-exchange-membrane fuel cell, and relate Pt-shell thickness to treatment, particle size, surface orientation, and ordering.","authors_text":"David A. Muller, Frederick T. Wagner, Huolin L. Xin (1), Julia A. Mundy (1), Junliang Zhang, Lena Fitting Kourkoutis, Nalini P. Subramanian, Randi Cabezas, Robert Hovden, Rohit Makharia, Zhongyi Liu","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-11-29T05:26:34Z","title":"Atomic-resolution spectroscopic imaging of ensembles of nanocatalyst particles across the life of a fuel cell"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1111.6697","kind":"arxiv","version":2},"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":"sha256:902a6c5d89130391eb36ee2dbbce5e64ade2401268cc879b5bfbe1ce13e28a37","target":"record","created_at":"2026-05-18T02:25:11Z","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":"6fc478674c8f77306607acd6c6375af6b8ef84bced6d400e187bda7b032d9875","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-11-29T05:26:34Z","title_canon_sha256":"37e5ada08f66efccf333c165bdac28afe4878a0f6314e60b290a7510a981f3f0"},"schema_version":"1.0","source":{"id":"1111.6697","kind":"arxiv","version":2}},"canonical_sha256":"0dccc971c37a490d8fa060b54f91c9ae22e360098ef8f92971dfe546087924f8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0dccc971c37a490d8fa060b54f91c9ae22e360098ef8f92971dfe546087924f8","first_computed_at":"2026-05-18T02:25:11.501091Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:25:11.501091Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xiLbS8QjSCPinNS6BEN/esZFtKfEXctC70VcYHFVky5rXkZBgabpKc8So94XC+xUKlPMmWveUPT7BaiocjgbCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:25:11.501692Z","signed_message":"canonical_sha256_bytes"},"source_id":"1111.6697","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:902a6c5d89130391eb36ee2dbbce5e64ade2401268cc879b5bfbe1ce13e28a37","sha256:3ecf797a9730e7148fff71ec722ebc3a1f48e3730a54db7c6cd2f9747ff3d996"],"state_sha256":"7c6bf23667f98da203e8532acb2bdd02b05188ae181b7b931800921a6cabea07"}