{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:VKDPZPBVMPIF5Z4WQQ62G2ARUU","short_pith_number":"pith:VKDPZPBV","canonical_record":{"source":{"id":"1302.7171","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-02-28T12:36:18Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"1fcfabf442c31ddf593e8dbf93fdf4617c32d3fd3304eb64487b46f36718e974","abstract_canon_sha256":"e13a497e8a5bc4c6d2178dad2e475d99c6a4f960e5b6f08a2c8c9053de23e682"},"schema_version":"1.0"},"canonical_sha256":"aa86fcbc3563d05ee796843da36811a518380062f395d7e481c269d8579d9854","source":{"kind":"arxiv","id":"1302.7171","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.7171","created_at":"2026-05-18T03:19:24Z"},{"alias_kind":"arxiv_version","alias_value":"1302.7171v1","created_at":"2026-05-18T03:19:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.7171","created_at":"2026-05-18T03:19:24Z"},{"alias_kind":"pith_short_12","alias_value":"VKDPZPBVMPIF","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"VKDPZPBVMPIF5Z4W","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"VKDPZPBV","created_at":"2026-05-18T12:28:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:VKDPZPBVMPIF5Z4WQQ62G2ARUU","target":"record","payload":{"canonical_record":{"source":{"id":"1302.7171","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-02-28T12:36:18Z","cross_cats_sorted":["cond-mat.soft"],"title_canon_sha256":"1fcfabf442c31ddf593e8dbf93fdf4617c32d3fd3304eb64487b46f36718e974","abstract_canon_sha256":"e13a497e8a5bc4c6d2178dad2e475d99c6a4f960e5b6f08a2c8c9053de23e682"},"schema_version":"1.0"},"canonical_sha256":"aa86fcbc3563d05ee796843da36811a518380062f395d7e481c269d8579d9854","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:19:24.201130Z","signature_b64":"mtRnhZWjFxKrH72Tk6SE98azUZRMVkHHjWFCjPONW+/mO7H4iO7fLJcIhN7DK3sRkOWw1Ze+Ze80U9OkZ/oSAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aa86fcbc3563d05ee796843da36811a518380062f395d7e481c269d8579d9854","last_reissued_at":"2026-05-18T03:19:24.200336Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:19:24.200336Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.7171","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":"2026-05-18T03:19:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BXhhtur/EvXSqE4LY35Ai42prmuifzwkctkZPzI0dxYusFJ+z8kp7dtKMZd9AVOiGiDo019/+M1rhI6R2W3LCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T21:29:20.286115Z"},"content_sha256":"75d2fdf662ec243a906793965bf13c307cdbf4c9612335bcc694d9ca4ab68f37","schema_version":"1.0","event_id":"sha256:75d2fdf662ec243a906793965bf13c307cdbf4c9612335bcc694d9ca4ab68f37"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:VKDPZPBVMPIF5Z4WQQ62G2ARUU","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Physisorption of DNA nucleobases on h-BN and graphene: vdW-corrected DFT calculations","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.soft"],"primary_cat":"cond-mat.mes-hall","authors_text":"Hyun-Jung Kim, Jun-Ho Lee, Jun-Hyung Cho, Ralph H. Scheicher, Yun-Ki Choi","submitted_at":"2013-02-28T12:36:18Z","abstract_excerpt":"We present a comparative study of DNA nucleobases [guanine (G), adenine (A), thymine (T), and cytosine (C)] adsorbed on hexagonal boron nitride (\\textit{h}-BN) sheet and graphene, using local, semilocal, and van der Waals (vdW) energy-corrected density-functional theory (DFT) calculations. Intriguingly, despite the very different electronic properties of BN sheet and graphene, we find rather similar binding energies for the various nucleobase molecules when adsorbed on the two types of sheets. The calculated binding energies of the four nucleobases using the local, semilocal, and DFT+vdW schem"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.7171","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":"2026-05-18T03:19:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1DytTyaBNOJOtGzdpAXqXtSSEAtQe3aqyY/17EdO2YHwe+VZgCLWpmqi+f0FseaOFiyeX1zFJneof63xogKNCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T21:29:20.286787Z"},"content_sha256":"edc3968d30f682ef7f1ebe7341e75d890dd8062f896f1adfbe514b0209738aa1","schema_version":"1.0","event_id":"sha256:edc3968d30f682ef7f1ebe7341e75d890dd8062f896f1adfbe514b0209738aa1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VKDPZPBVMPIF5Z4WQQ62G2ARUU/bundle.json","state_url":"https://pith.science/pith/VKDPZPBVMPIF5Z4WQQ62G2ARUU/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VKDPZPBVMPIF5Z4WQQ62G2ARUU/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":"2026-06-05T21:29:20Z","links":{"resolver":"https://pith.science/pith/VKDPZPBVMPIF5Z4WQQ62G2ARUU","bundle":"https://pith.science/pith/VKDPZPBVMPIF5Z4WQQ62G2ARUU/bundle.json","state":"https://pith.science/pith/VKDPZPBVMPIF5Z4WQQ62G2ARUU/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VKDPZPBVMPIF5Z4WQQ62G2ARUU/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:VKDPZPBVMPIF5Z4WQQ62G2ARUU","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":"e13a497e8a5bc4c6d2178dad2e475d99c6a4f960e5b6f08a2c8c9053de23e682","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-02-28T12:36:18Z","title_canon_sha256":"1fcfabf442c31ddf593e8dbf93fdf4617c32d3fd3304eb64487b46f36718e974"},"schema_version":"1.0","source":{"id":"1302.7171","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.7171","created_at":"2026-05-18T03:19:24Z"},{"alias_kind":"arxiv_version","alias_value":"1302.7171v1","created_at":"2026-05-18T03:19:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.7171","created_at":"2026-05-18T03:19:24Z"},{"alias_kind":"pith_short_12","alias_value":"VKDPZPBVMPIF","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_16","alias_value":"VKDPZPBVMPIF5Z4W","created_at":"2026-05-18T12:28:04Z"},{"alias_kind":"pith_short_8","alias_value":"VKDPZPBV","created_at":"2026-05-18T12:28:04Z"}],"graph_snapshots":[{"event_id":"sha256:edc3968d30f682ef7f1ebe7341e75d890dd8062f896f1adfbe514b0209738aa1","target":"graph","created_at":"2026-05-18T03:19:24Z","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 present a comparative study of DNA nucleobases [guanine (G), adenine (A), thymine (T), and cytosine (C)] adsorbed on hexagonal boron nitride (\\textit{h}-BN) sheet and graphene, using local, semilocal, and van der Waals (vdW) energy-corrected density-functional theory (DFT) calculations. Intriguingly, despite the very different electronic properties of BN sheet and graphene, we find rather similar binding energies for the various nucleobase molecules when adsorbed on the two types of sheets. The calculated binding energies of the four nucleobases using the local, semilocal, and DFT+vdW schem","authors_text":"Hyun-Jung Kim, Jun-Ho Lee, Jun-Hyung Cho, Ralph H. Scheicher, Yun-Ki Choi","cross_cats":["cond-mat.soft"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-02-28T12:36:18Z","title":"Physisorption of DNA nucleobases on h-BN and graphene: vdW-corrected DFT calculations"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.7171","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":"sha256:75d2fdf662ec243a906793965bf13c307cdbf4c9612335bcc694d9ca4ab68f37","target":"record","created_at":"2026-05-18T03:19:24Z","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":"e13a497e8a5bc4c6d2178dad2e475d99c6a4f960e5b6f08a2c8c9053de23e682","cross_cats_sorted":["cond-mat.soft"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2013-02-28T12:36:18Z","title_canon_sha256":"1fcfabf442c31ddf593e8dbf93fdf4617c32d3fd3304eb64487b46f36718e974"},"schema_version":"1.0","source":{"id":"1302.7171","kind":"arxiv","version":1}},"canonical_sha256":"aa86fcbc3563d05ee796843da36811a518380062f395d7e481c269d8579d9854","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aa86fcbc3563d05ee796843da36811a518380062f395d7e481c269d8579d9854","first_computed_at":"2026-05-18T03:19:24.200336Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:19:24.200336Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mtRnhZWjFxKrH72Tk6SE98azUZRMVkHHjWFCjPONW+/mO7H4iO7fLJcIhN7DK3sRkOWw1Ze+Ze80U9OkZ/oSAw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:19:24.201130Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.7171","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:75d2fdf662ec243a906793965bf13c307cdbf4c9612335bcc694d9ca4ab68f37","sha256:edc3968d30f682ef7f1ebe7341e75d890dd8062f896f1adfbe514b0209738aa1"],"state_sha256":"b5f59b02f31fb9e1428af44e423f9eaa668361d39ffd954b96d8fb43a57985ad"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fw429asS3FPz34q3KxQsA3K+WQnQfn3ZXyXzKnFZIx9Ac55CzQ58Ndzf6jM8Ky/vn5pI1kLnEiPYfRPLci+3Ag==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T21:29:20.294222Z","bundle_sha256":"4e2eb800b20402a91475030c97fe4d79b991aa78cee82db9545002ecaea96af1"}}