{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:HJ2UYLSJB5BZJ75AXFA6TBQGVR","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":"f9bb717b69fa5df15e5192e47ba672b0f81fd8adf4566f64f1de8edbaaf88036","cross_cats_sorted":["cond-mat.mes-hall","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-05T09:51:12Z","title_canon_sha256":"2af9646927f3d59274930277367074aa997207fe9eff17d38c4396dc0ffda5c1"},"schema_version":"1.0","source":{"id":"1312.1484","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1312.1484","created_at":"2026-05-18T03:05:27Z"},{"alias_kind":"arxiv_version","alias_value":"1312.1484v1","created_at":"2026-05-18T03:05:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.1484","created_at":"2026-05-18T03:05:27Z"},{"alias_kind":"pith_short_12","alias_value":"HJ2UYLSJB5BZ","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_16","alias_value":"HJ2UYLSJB5BZJ75A","created_at":"2026-05-18T12:27:46Z"},{"alias_kind":"pith_short_8","alias_value":"HJ2UYLSJ","created_at":"2026-05-18T12:27:46Z"}],"graph_snapshots":[{"event_id":"sha256:278842579b919636c252d19cb2050b65a6231992d2672e911992ad14384c3a6d","target":"graph","created_at":"2026-05-18T03:05:27Z","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":"A series of W, N codoped TiO2 nanotube arrays with different dopant contents were fabricated by anodizing in association with hydrothermal treatment. The samples were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and ultraviolet-visible light diffuse reflection spectroscopy. Moreover, the photocatalytic activity of W and N codoped TiO2 nanotube arrays was evaluated by degradation of methylene blue under visible light irradiation.","authors_text":"DanDan Lu, Jianjun Yang, Juan Wu, Min Zhang","cross_cats":["cond-mat.mes-hall","physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-05T09:51:12Z","title":"Enhanced Visible Light Photocatalytic Activity for TiO2 Nanotube Array Films by Codoping with Tungsten and Nitrogen"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.1484","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:ac722222eaca5f17b892f256810d2a8eca9e13192ea299db9dc2d677dc45c901","target":"record","created_at":"2026-05-18T03:05:27Z","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":"f9bb717b69fa5df15e5192e47ba672b0f81fd8adf4566f64f1de8edbaaf88036","cross_cats_sorted":["cond-mat.mes-hall","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-05T09:51:12Z","title_canon_sha256":"2af9646927f3d59274930277367074aa997207fe9eff17d38c4396dc0ffda5c1"},"schema_version":"1.0","source":{"id":"1312.1484","kind":"arxiv","version":1}},"canonical_sha256":"3a754c2e490f4394ffa0b941e98606ac5dabe16650b1c53fba380b0fe0af6cf6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3a754c2e490f4394ffa0b941e98606ac5dabe16650b1c53fba380b0fe0af6cf6","first_computed_at":"2026-05-18T03:05:27.151732Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:05:27.151732Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"xymY5umrvICZoG2FmmwYyZ80OcOn/sMnW8gERFgx2ouq6ThrWQ4tl006QxCkUBHib3TTd0VkXyL/eGTBHf8BBw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:05:27.152171Z","signed_message":"canonical_sha256_bytes"},"source_id":"1312.1484","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ac722222eaca5f17b892f256810d2a8eca9e13192ea299db9dc2d677dc45c901","sha256:278842579b919636c252d19cb2050b65a6231992d2672e911992ad14384c3a6d"],"state_sha256":"894411eba0f5e2cfc21d38e4ca73e64f3c9209609f5df2ffc67394d63cf420e3"}