{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:U22SBNVSBJFLVYTMHSRJMZB77S","short_pith_number":"pith:U22SBNVS","canonical_record":{"source":{"id":"1912.12848","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-12-30T08:38:29Z","cross_cats_sorted":[],"title_canon_sha256":"e24fb8b5d87abfb06fd9eca4ac8b8460d38254da18772e9af8f79931633bc09e","abstract_canon_sha256":"1052783a00b0d84efd8b73fe77cf319b8af2f0e36934d82752ccbf9c334a2505"},"schema_version":"1.0"},"canonical_sha256":"a6b520b6b20a4abae26c3ca296643ffc9af52cb7a82015d860d03bca164ff4e9","source":{"kind":"arxiv","id":"1912.12848","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.12848","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"arxiv_version","alias_value":"1912.12848v3","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.12848","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"pith_short_12","alias_value":"U22SBNVSBJFL","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"pith_short_16","alias_value":"U22SBNVSBJFLVYTM","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"pith_short_8","alias_value":"U22SBNVS","created_at":"2026-07-05T00:43:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:U22SBNVSBJFLVYTMHSRJMZB77S","target":"record","payload":{"canonical_record":{"source":{"id":"1912.12848","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-12-30T08:38:29Z","cross_cats_sorted":[],"title_canon_sha256":"e24fb8b5d87abfb06fd9eca4ac8b8460d38254da18772e9af8f79931633bc09e","abstract_canon_sha256":"1052783a00b0d84efd8b73fe77cf319b8af2f0e36934d82752ccbf9c334a2505"},"schema_version":"1.0"},"canonical_sha256":"a6b520b6b20a4abae26c3ca296643ffc9af52cb7a82015d860d03bca164ff4e9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:43:57.459547Z","signature_b64":"FG2aIJyZXSaWGQXZE8ULZrMITyKd8Juz2gvDIfrjwR8beOUyGKyoGutGIUH+wmmNL4zVaKqAXmJJeff9xoY9AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a6b520b6b20a4abae26c3ca296643ffc9af52cb7a82015d860d03bca164ff4e9","last_reissued_at":"2026-07-05T00:43:57.459185Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:43:57.459185Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1912.12848","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T00:43:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"C5pHysvNjH94DBqa+OjHKeaxAQaOBaUXfSAT8LUCLFpeUhoUqmnTxyscnr5aN7WrYyuvv0Crgj61gP8N0khJAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T23:33:37.742795Z"},"content_sha256":"b5c5a7e7755d648e1143ba3bb14c46766d19738e88356a7dad418d76f2730a73","schema_version":"1.0","event_id":"sha256:b5c5a7e7755d648e1143ba3bb14c46766d19738e88356a7dad418d76f2730a73"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:U22SBNVSBJFLVYTMHSRJMZB77S","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Porous carbon nanowire array for highly sensitive, biocompatible, reproducible surface-enhanced Raman spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Keisuke Goda, Kotaro Hiramatsu, Nan Chen, Tamitake Itoh, Ting-Hui Xiao, Yasutaka Kitahama, Zhenyi Luo, Zhenzhou Cheng","submitted_at":"2019-12-30T08:38:29Z","abstract_excerpt":"Surface-enhanced Raman spectroscopy (SERS) is a powerful tool for vibrational spectroscopy as it provides several orders of magnitude higher sensitivity than inherently weak spontaneous Raman scattering by exciting localized surface plasmon resonance (LSPR) on metal substrates. However, SERS is not very reliable, especially for use in life sciences, since it sacrifices reproducibility and biocompatibility due to its strong dependence on \"hot spots\" and large photothermal heat generation. Here we report a metal-free (i.e., LSPR-free), topologically tailored nanostructure composed of porous carb"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.12848","kind":"arxiv","version":3},"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/1912.12848/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":"2026-07-05T00:43:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0hwjnSZ/2ovRzL45WEzD3arHg/fhDfHSPJvBzuyl92YMH6sWlhpiq7D9rN9VhdUbgiWney2oEmSNhFHBB/AvDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-23T23:33:37.743294Z"},"content_sha256":"ab7a060ec9ea70f979ddd167f8bb0e0f83c9b742561961648e28504c78559aab","schema_version":"1.0","event_id":"sha256:ab7a060ec9ea70f979ddd167f8bb0e0f83c9b742561961648e28504c78559aab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/U22SBNVSBJFLVYTMHSRJMZB77S/bundle.json","state_url":"https://pith.science/pith/U22SBNVSBJFLVYTMHSRJMZB77S/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/U22SBNVSBJFLVYTMHSRJMZB77S/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":"2026-08-23T23:33:37Z","links":{"resolver":"https://pith.science/pith/U22SBNVSBJFLVYTMHSRJMZB77S","bundle":"https://pith.science/pith/U22SBNVSBJFLVYTMHSRJMZB77S/bundle.json","state":"https://pith.science/pith/U22SBNVSBJFLVYTMHSRJMZB77S/state.json","well_known_bundle":"https://pith.science/.well-known/pith/U22SBNVSBJFLVYTMHSRJMZB77S/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:U22SBNVSBJFLVYTMHSRJMZB77S","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":"1052783a00b0d84efd8b73fe77cf319b8af2f0e36934d82752ccbf9c334a2505","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-12-30T08:38:29Z","title_canon_sha256":"e24fb8b5d87abfb06fd9eca4ac8b8460d38254da18772e9af8f79931633bc09e"},"schema_version":"1.0","source":{"id":"1912.12848","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1912.12848","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"arxiv_version","alias_value":"1912.12848v3","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1912.12848","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"pith_short_12","alias_value":"U22SBNVSBJFL","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"pith_short_16","alias_value":"U22SBNVSBJFLVYTM","created_at":"2026-07-05T00:43:57Z"},{"alias_kind":"pith_short_8","alias_value":"U22SBNVS","created_at":"2026-07-05T00:43:57Z"}],"graph_snapshots":[{"event_id":"sha256:ab7a060ec9ea70f979ddd167f8bb0e0f83c9b742561961648e28504c78559aab","target":"graph","created_at":"2026-07-05T00:43:57Z","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/1912.12848/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Surface-enhanced Raman spectroscopy (SERS) is a powerful tool for vibrational spectroscopy as it provides several orders of magnitude higher sensitivity than inherently weak spontaneous Raman scattering by exciting localized surface plasmon resonance (LSPR) on metal substrates. However, SERS is not very reliable, especially for use in life sciences, since it sacrifices reproducibility and biocompatibility due to its strong dependence on \"hot spots\" and large photothermal heat generation. Here we report a metal-free (i.e., LSPR-free), topologically tailored nanostructure composed of porous carb","authors_text":"Keisuke Goda, Kotaro Hiramatsu, Nan Chen, Tamitake Itoh, Ting-Hui Xiao, Yasutaka Kitahama, Zhenyi Luo, Zhenzhou Cheng","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-12-30T08:38:29Z","title":"Porous carbon nanowire array for highly sensitive, biocompatible, reproducible surface-enhanced Raman spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1912.12848","kind":"arxiv","version":3},"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:b5c5a7e7755d648e1143ba3bb14c46766d19738e88356a7dad418d76f2730a73","target":"record","created_at":"2026-07-05T00:43:57Z","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":"1052783a00b0d84efd8b73fe77cf319b8af2f0e36934d82752ccbf9c334a2505","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-12-30T08:38:29Z","title_canon_sha256":"e24fb8b5d87abfb06fd9eca4ac8b8460d38254da18772e9af8f79931633bc09e"},"schema_version":"1.0","source":{"id":"1912.12848","kind":"arxiv","version":3}},"canonical_sha256":"a6b520b6b20a4abae26c3ca296643ffc9af52cb7a82015d860d03bca164ff4e9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a6b520b6b20a4abae26c3ca296643ffc9af52cb7a82015d860d03bca164ff4e9","first_computed_at":"2026-07-05T00:43:57.459185Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:43:57.459185Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FG2aIJyZXSaWGQXZE8ULZrMITyKd8Juz2gvDIfrjwR8beOUyGKyoGutGIUH+wmmNL4zVaKqAXmJJeff9xoY9AA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:43:57.459547Z","signed_message":"canonical_sha256_bytes"},"source_id":"1912.12848","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b5c5a7e7755d648e1143ba3bb14c46766d19738e88356a7dad418d76f2730a73","sha256:ab7a060ec9ea70f979ddd167f8bb0e0f83c9b742561961648e28504c78559aab"],"state_sha256":"acdae7264f56796e71b61ccdd206306009c8ec39470d77cb137a169f90c3a217"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XzQS2MIMG6Cfruv/d5dnmDGxN06bv/Gg9LddqOC9+CvOxkw/up/6N/Nu6XAbkSc6TRqoeQIjYNBWB0zcr+K+Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-23T23:33:37.748266Z","bundle_sha256":"ab9c4e621f9467ebdcb6779eebab7f6dad0c2f81dc226424bd6c6eab42aeabe2"}}