{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:5U2MMYBQYUGTEFMHTMRDQR72A4","short_pith_number":"pith:5U2MMYBQ","canonical_record":{"source":{"id":"1012.1836","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-08T19:33:49Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"c5c6c53ee3dd8757df5ea8284a03b522a5247ee13cd247b71e04c960f4b4d81f","abstract_canon_sha256":"b3f1420d5a8bcde764621b52c4f23c8658f686e47b5994fcc119b62cf8309929"},"schema_version":"1.0"},"canonical_sha256":"ed34c66030c50d3215879b223847fa072bb9a59a7eb3138f10d08a6f9c1e52a0","source":{"kind":"arxiv","id":"1012.1836","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.1836","created_at":"2026-05-18T04:20:38Z"},{"alias_kind":"arxiv_version","alias_value":"1012.1836v1","created_at":"2026-05-18T04:20:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.1836","created_at":"2026-05-18T04:20:38Z"},{"alias_kind":"pith_short_12","alias_value":"5U2MMYBQYUGT","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"5U2MMYBQYUGTEFMH","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"5U2MMYBQ","created_at":"2026-05-18T12:26:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:5U2MMYBQYUGTEFMHTMRDQR72A4","target":"record","payload":{"canonical_record":{"source":{"id":"1012.1836","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-08T19:33:49Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"c5c6c53ee3dd8757df5ea8284a03b522a5247ee13cd247b71e04c960f4b4d81f","abstract_canon_sha256":"b3f1420d5a8bcde764621b52c4f23c8658f686e47b5994fcc119b62cf8309929"},"schema_version":"1.0"},"canonical_sha256":"ed34c66030c50d3215879b223847fa072bb9a59a7eb3138f10d08a6f9c1e52a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:20:38.247025Z","signature_b64":"R820q0MWeIgOJsSR8bEEDn+Q7rK6Lq/LodjG5DnUDYvfUMs8pCu7GufRtEXd2Q/t0BQwoCap9N5s9Dg+jHSYAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ed34c66030c50d3215879b223847fa072bb9a59a7eb3138f10d08a6f9c1e52a0","last_reissued_at":"2026-05-18T04:20:38.246281Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:20:38.246281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1012.1836","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":"2026-05-18T04:20:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rJFoJdM3B25XgkuCDNUhzsgT4DV7rxSFLBaDAey2zArC5tzTUJQHE6zY+VHOsKVTZ5d+f/Y/AY302rUiCdWcDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:42:15.468750Z"},"content_sha256":"6bab2edbbbae5e9ac00d38c65d7a9f64296daf139fffb398f641df6162d53ac2","schema_version":"1.0","event_id":"sha256:6bab2edbbbae5e9ac00d38c65d7a9f64296daf139fffb398f641df6162d53ac2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:5U2MMYBQYUGTEFMHTMRDQR72A4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Intercalation of Few-Layer Graphite Flakes with FeCl3: Raman Determination of Fermi Level, Layer Decoupling and Stability","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. C. Ferrari, J. Liu, P. H. Tan, W. J. Zhao","submitted_at":"2010-12-08T19:33:49Z","abstract_excerpt":"We use anhydrous ferric chloride (FeCl3) to intercalate graphite flakes consisting of 2 to 4 graphene layers and to dope graphene monolayers. The intercalant, staging, stability and doping of the resulting intercalation compounds (ICs) are characterized by Raman scattering. The G peak of monolayer graphene heavily-doped by FeCl3 upshifts to~1627cm-1. 2-4 layer ICs have similar upshifts, and a Lorentzian lineshape for the 2D band, indicating that each layer behaves as a decoupled heavily doped monolayer. By performing Raman measurement at different excitation energies we show that, for a given "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.1836","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":""},"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":"2026-05-18T04:20:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9jIOcd7+eIbfSJpRLCJtmgvB1ZsNkUntq932ArpnZN9ghjQkbOgLr+c958pIFAHssFZJx3XxeVC3BsuDOAsWAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:42:15.469427Z"},"content_sha256":"09a07330431d25dc6daee791d7a8a88ccb90d56804f257d1ba01054a5671a1af","schema_version":"1.0","event_id":"sha256:09a07330431d25dc6daee791d7a8a88ccb90d56804f257d1ba01054a5671a1af"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5U2MMYBQYUGTEFMHTMRDQR72A4/bundle.json","state_url":"https://pith.science/pith/5U2MMYBQYUGTEFMHTMRDQR72A4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5U2MMYBQYUGTEFMHTMRDQR72A4/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":"2026-05-30T10:42:15Z","links":{"resolver":"https://pith.science/pith/5U2MMYBQYUGTEFMHTMRDQR72A4","bundle":"https://pith.science/pith/5U2MMYBQYUGTEFMHTMRDQR72A4/bundle.json","state":"https://pith.science/pith/5U2MMYBQYUGTEFMHTMRDQR72A4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5U2MMYBQYUGTEFMHTMRDQR72A4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:5U2MMYBQYUGTEFMHTMRDQR72A4","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":"b3f1420d5a8bcde764621b52c4f23c8658f686e47b5994fcc119b62cf8309929","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-08T19:33:49Z","title_canon_sha256":"c5c6c53ee3dd8757df5ea8284a03b522a5247ee13cd247b71e04c960f4b4d81f"},"schema_version":"1.0","source":{"id":"1012.1836","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1012.1836","created_at":"2026-05-18T04:20:38Z"},{"alias_kind":"arxiv_version","alias_value":"1012.1836v1","created_at":"2026-05-18T04:20:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1012.1836","created_at":"2026-05-18T04:20:38Z"},{"alias_kind":"pith_short_12","alias_value":"5U2MMYBQYUGT","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_16","alias_value":"5U2MMYBQYUGTEFMH","created_at":"2026-05-18T12:26:04Z"},{"alias_kind":"pith_short_8","alias_value":"5U2MMYBQ","created_at":"2026-05-18T12:26:04Z"}],"graph_snapshots":[{"event_id":"sha256:09a07330431d25dc6daee791d7a8a88ccb90d56804f257d1ba01054a5671a1af","target":"graph","created_at":"2026-05-18T04:20:38Z","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":"We use anhydrous ferric chloride (FeCl3) to intercalate graphite flakes consisting of 2 to 4 graphene layers and to dope graphene monolayers. The intercalant, staging, stability and doping of the resulting intercalation compounds (ICs) are characterized by Raman scattering. The G peak of monolayer graphene heavily-doped by FeCl3 upshifts to~1627cm-1. 2-4 layer ICs have similar upshifts, and a Lorentzian lineshape for the 2D band, indicating that each layer behaves as a decoupled heavily doped monolayer. By performing Raman measurement at different excitation energies we show that, for a given ","authors_text":"A. C. Ferrari, J. Liu, P. H. Tan, W. J. Zhao","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-08T19:33:49Z","title":"Intercalation of Few-Layer Graphite Flakes with FeCl3: Raman Determination of Fermi Level, Layer Decoupling and Stability"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1012.1836","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":"sha256:6bab2edbbbae5e9ac00d38c65d7a9f64296daf139fffb398f641df6162d53ac2","target":"record","created_at":"2026-05-18T04:20:38Z","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":"b3f1420d5a8bcde764621b52c4f23c8658f686e47b5994fcc119b62cf8309929","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2010-12-08T19:33:49Z","title_canon_sha256":"c5c6c53ee3dd8757df5ea8284a03b522a5247ee13cd247b71e04c960f4b4d81f"},"schema_version":"1.0","source":{"id":"1012.1836","kind":"arxiv","version":1}},"canonical_sha256":"ed34c66030c50d3215879b223847fa072bb9a59a7eb3138f10d08a6f9c1e52a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ed34c66030c50d3215879b223847fa072bb9a59a7eb3138f10d08a6f9c1e52a0","first_computed_at":"2026-05-18T04:20:38.246281Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:20:38.246281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"R820q0MWeIgOJsSR8bEEDn+Q7rK6Lq/LodjG5DnUDYvfUMs8pCu7GufRtEXd2Q/t0BQwoCap9N5s9Dg+jHSYAw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:20:38.247025Z","signed_message":"canonical_sha256_bytes"},"source_id":"1012.1836","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:6bab2edbbbae5e9ac00d38c65d7a9f64296daf139fffb398f641df6162d53ac2","sha256:09a07330431d25dc6daee791d7a8a88ccb90d56804f257d1ba01054a5671a1af"],"state_sha256":"18790b93d662535da368bb5a5940f6ca34106e0b07a0f46b270f1a760c035958"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Iq5BtCiTryaKomtf+3fzgiR4pyqPxhNhN7o92o+AZzDvOJ397YNSsYyR+yvAioWaxxiZ6uYdQzbkaIkq4uhEBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T10:42:15.473616Z","bundle_sha256":"847c6f270f8b5a6614532952914a060da51f3e23f480323954c3ff030e317ad2"}}