{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:ELXIZP34DW4UOQAWA4FLIXDJPH","short_pith_number":"pith:ELXIZP34","canonical_record":{"source":{"id":"1206.1972","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-06-09T20:34:27Z","cross_cats_sorted":[],"title_canon_sha256":"4d343a93a152e14386a3a3d8c3f3ccd84c6dd149da52c652c2a09ae9d834ac42","abstract_canon_sha256":"4354ac8682587cb7f7cdc2cbeed265123ea28dcbf85b284313633aa600116f16"},"schema_version":"1.0"},"canonical_sha256":"22ee8cbf7c1db9474016070ab45c6979e89112e2a216fd3706236daa6c5f6dcf","source":{"kind":"arxiv","id":"1206.1972","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.1972","created_at":"2026-05-18T03:53:53Z"},{"alias_kind":"arxiv_version","alias_value":"1206.1972v1","created_at":"2026-05-18T03:53:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.1972","created_at":"2026-05-18T03:53:53Z"},{"alias_kind":"pith_short_12","alias_value":"ELXIZP34DW4U","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"ELXIZP34DW4UOQAW","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"ELXIZP34","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:ELXIZP34DW4UOQAWA4FLIXDJPH","target":"record","payload":{"canonical_record":{"source":{"id":"1206.1972","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-06-09T20:34:27Z","cross_cats_sorted":[],"title_canon_sha256":"4d343a93a152e14386a3a3d8c3f3ccd84c6dd149da52c652c2a09ae9d834ac42","abstract_canon_sha256":"4354ac8682587cb7f7cdc2cbeed265123ea28dcbf85b284313633aa600116f16"},"schema_version":"1.0"},"canonical_sha256":"22ee8cbf7c1db9474016070ab45c6979e89112e2a216fd3706236daa6c5f6dcf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:53:53.709976Z","signature_b64":"A4zDCB7JhgxVM8MkhbFtFNFw7zH0uAHVhdyinyUHAbbwrWPREF4Ap8f36lf1ChYA9O1XvwK3KN9nFiBrxJXcDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"22ee8cbf7c1db9474016070ab45c6979e89112e2a216fd3706236daa6c5f6dcf","last_reissued_at":"2026-05-18T03:53:53.709531Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:53:53.709531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.1972","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":"2026-05-18T03:53:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cq0y+/zfzmpuvFS0mPjxFi+Xe1iPN0awy7PNeYMEndlEAcCLFcP13X21agMYWqmyHT9fkbCtbzR+5oEv4+YmAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T17:20:54.537391Z"},"content_sha256":"9c559858e44d6c82755a2c5995900547682bffec5441a971011f77fa0f1bf900","schema_version":"1.0","event_id":"sha256:9c559858e44d6c82755a2c5995900547682bffec5441a971011f77fa0f1bf900"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:ELXIZP34DW4UOQAWA4FLIXDJPH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A van der Waals density functional study of chloroform and bromoform on graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Elsebeth Schr\\\"oder, Joel {\\AA}kesson, Olof Wahlstr\\\"om, Oskar Sundborg","submitted_at":"2012-06-09T20:34:27Z","abstract_excerpt":"A calculational study of the trihalomethanes chloroform (CHCl_3) and bromoform (CHBr_3) adsorbed on graphene is presented. The study uses the van der Waals density functional method vdW-DF to obtain adsorption energies and adsorption structures for these molecules of environmental concern. In this study chloroform is found to adsorb with the H atom pointing away from graphene, with adsorption energy 357 meV (34.4 kJ/mol). For bromoform the calculated adsorption energy is 404 meV (39.0 kJ/mol). The corrugation of graphene as seen by chloroform is small, the difference in adsorption energy along"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.1972","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":"2026-05-18T03:53:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b5U4+e0aF7keSqqTkKbjNOTR2613krNK3FvAXeoxp2S9L1CZqpBaJYxPb5480N6tWXJQ26IO1Zn1oGilT2boAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T17:20:54.537743Z"},"content_sha256":"93692b6d13eecebe90e59b3bd5dd50876035780e5d55b0069f46355b9e848d7f","schema_version":"1.0","event_id":"sha256:93692b6d13eecebe90e59b3bd5dd50876035780e5d55b0069f46355b9e848d7f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ELXIZP34DW4UOQAWA4FLIXDJPH/bundle.json","state_url":"https://pith.science/pith/ELXIZP34DW4UOQAWA4FLIXDJPH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ELXIZP34DW4UOQAWA4FLIXDJPH/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":"2026-06-03T17:20:54Z","links":{"resolver":"https://pith.science/pith/ELXIZP34DW4UOQAWA4FLIXDJPH","bundle":"https://pith.science/pith/ELXIZP34DW4UOQAWA4FLIXDJPH/bundle.json","state":"https://pith.science/pith/ELXIZP34DW4UOQAWA4FLIXDJPH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ELXIZP34DW4UOQAWA4FLIXDJPH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:ELXIZP34DW4UOQAWA4FLIXDJPH","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":"4354ac8682587cb7f7cdc2cbeed265123ea28dcbf85b284313633aa600116f16","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-06-09T20:34:27Z","title_canon_sha256":"4d343a93a152e14386a3a3d8c3f3ccd84c6dd149da52c652c2a09ae9d834ac42"},"schema_version":"1.0","source":{"id":"1206.1972","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.1972","created_at":"2026-05-18T03:53:53Z"},{"alias_kind":"arxiv_version","alias_value":"1206.1972v1","created_at":"2026-05-18T03:53:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.1972","created_at":"2026-05-18T03:53:53Z"},{"alias_kind":"pith_short_12","alias_value":"ELXIZP34DW4U","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"ELXIZP34DW4UOQAW","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"ELXIZP34","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:93692b6d13eecebe90e59b3bd5dd50876035780e5d55b0069f46355b9e848d7f","target":"graph","created_at":"2026-05-18T03:53:53Z","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 calculational study of the trihalomethanes chloroform (CHCl_3) and bromoform (CHBr_3) adsorbed on graphene is presented. The study uses the van der Waals density functional method vdW-DF to obtain adsorption energies and adsorption structures for these molecules of environmental concern. In this study chloroform is found to adsorb with the H atom pointing away from graphene, with adsorption energy 357 meV (34.4 kJ/mol). For bromoform the calculated adsorption energy is 404 meV (39.0 kJ/mol). The corrugation of graphene as seen by chloroform is small, the difference in adsorption energy along","authors_text":"Elsebeth Schr\\\"oder, Joel {\\AA}kesson, Olof Wahlstr\\\"om, Oskar Sundborg","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-06-09T20:34:27Z","title":"A van der Waals density functional study of chloroform and bromoform on graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.1972","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":"sha256:9c559858e44d6c82755a2c5995900547682bffec5441a971011f77fa0f1bf900","target":"record","created_at":"2026-05-18T03:53:53Z","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":"4354ac8682587cb7f7cdc2cbeed265123ea28dcbf85b284313633aa600116f16","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-06-09T20:34:27Z","title_canon_sha256":"4d343a93a152e14386a3a3d8c3f3ccd84c6dd149da52c652c2a09ae9d834ac42"},"schema_version":"1.0","source":{"id":"1206.1972","kind":"arxiv","version":1}},"canonical_sha256":"22ee8cbf7c1db9474016070ab45c6979e89112e2a216fd3706236daa6c5f6dcf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22ee8cbf7c1db9474016070ab45c6979e89112e2a216fd3706236daa6c5f6dcf","first_computed_at":"2026-05-18T03:53:53.709531Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:53:53.709531Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A4zDCB7JhgxVM8MkhbFtFNFw7zH0uAHVhdyinyUHAbbwrWPREF4Ap8f36lf1ChYA9O1XvwK3KN9nFiBrxJXcDg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:53:53.709976Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.1972","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c559858e44d6c82755a2c5995900547682bffec5441a971011f77fa0f1bf900","sha256:93692b6d13eecebe90e59b3bd5dd50876035780e5d55b0069f46355b9e848d7f"],"state_sha256":"5a749c8949f79bf2b97276d429f9d1129480fd05ce756b3008fe08c691fe6358"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p47r4lCt77yKBI1XHXptoBhdHPUXKm0fSdFlKmtJcuizzG4eisKi9uxPvM4Q7a8+x9jtr3cFStcTgW2kaxWDCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T17:20:54.539680Z","bundle_sha256":"4be80f48d8388ee11ca83ba71d40a2c9e91f9ba0a5330db02e57eae6bbe9e092"}}