{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:QIP2JAFWYD4GECAIXAMJ7YUGZA","short_pith_number":"pith:QIP2JAFW","canonical_record":{"source":{"id":"1110.6009","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-10-27T08:31:07Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"aa4b75481b87f8903abde8823b1c375fec3c20e3dd3a44986819e01374012d40","abstract_canon_sha256":"d300ecba83fba3713a0df058b0d59294b3e109e5086cef4c5aecc17f4b816db6"},"schema_version":"1.0"},"canonical_sha256":"821fa480b6c0f8620808b8189fe286c8258642005e5554c872a122674a1969cc","source":{"kind":"arxiv","id":"1110.6009","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.6009","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"arxiv_version","alias_value":"1110.6009v1","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.6009","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"pith_short_12","alias_value":"QIP2JAFWYD4G","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QIP2JAFWYD4GECAI","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QIP2JAFW","created_at":"2026-05-18T12:26:39Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:QIP2JAFWYD4GECAIXAMJ7YUGZA","target":"record","payload":{"canonical_record":{"source":{"id":"1110.6009","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-10-27T08:31:07Z","cross_cats_sorted":["physics.chem-ph"],"title_canon_sha256":"aa4b75481b87f8903abde8823b1c375fec3c20e3dd3a44986819e01374012d40","abstract_canon_sha256":"d300ecba83fba3713a0df058b0d59294b3e109e5086cef4c5aecc17f4b816db6"},"schema_version":"1.0"},"canonical_sha256":"821fa480b6c0f8620808b8189fe286c8258642005e5554c872a122674a1969cc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:54:47.817289Z","signature_b64":"Yx1gpmFqxqU8Z8/WXR72j0Y9dPSvCyYV2K8/KQUU4du7uN8DhIJNNI56bN4tRKgGcEX5UBaeJGldng0/wfIxBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"821fa480b6c0f8620808b8189fe286c8258642005e5554c872a122674a1969cc","last_reissued_at":"2026-05-18T03:54:47.816607Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:54:47.816607Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1110.6009","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":"2026-05-18T03:54:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CtN19qtrsRA7cYv2cQnu9Hc9a5Dc9gU2XnNxKr0JhWzz6riju4RvPNrkFSt8Mk+Bu/NJCXbmNMIGbF6gtA4ICA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T04:33:22.728908Z"},"content_sha256":"b662e049a68988d51bee6a0e1f854091fa2886c85f477135d08e176387318392","schema_version":"1.0","event_id":"sha256:b662e049a68988d51bee6a0e1f854091fa2886c85f477135d08e176387318392"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:QIP2JAFWYD4GECAIXAMJ7YUGZA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First-principles study for the adsorption of segments of BPA-PC on alpha-Al2O3(0001)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.chem-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Janne Blomqvist, Petri Salo","submitted_at":"2011-10-27T08:31:07Z","abstract_excerpt":"We have studied the adsorption of bisphenol-A-polycarbonate (BPA-PC) on the alpha-Al2O3(0001) surface using density-functional theory (DFT) with van der Waals (vdW) corrections. The BPA-PC polymer can be divided into its chemical fragments which are phenylene, carbonate and isopropylidene groups. We have calculated the adsorption energy and geometry of the BPA-PC segments that consist of two to three adjacent groups of the polymer. Our DFT results show that the adsorption is dominated by the vdW interaction. It is also important to include the interaction of nearest-neighbor groups in order to"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.6009","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":"2026-05-18T03:54:47Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nIEHvcZM8FGxkrcG83ZRSrsBuosUDNUCotj3b4nQ3jp/L9R2osNsUXHe/DL72eWb9jsCTqd/wG9VcfsWHCpOAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-28T04:33:22.729239Z"},"content_sha256":"9eb532590425506c128dadd1f1445a4aee18c481b86a5f5dbafd4beffda0a530","schema_version":"1.0","event_id":"sha256:9eb532590425506c128dadd1f1445a4aee18c481b86a5f5dbafd4beffda0a530"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QIP2JAFWYD4GECAIXAMJ7YUGZA/bundle.json","state_url":"https://pith.science/pith/QIP2JAFWYD4GECAIXAMJ7YUGZA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QIP2JAFWYD4GECAIXAMJ7YUGZA/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":"2026-06-28T04:33:22Z","links":{"resolver":"https://pith.science/pith/QIP2JAFWYD4GECAIXAMJ7YUGZA","bundle":"https://pith.science/pith/QIP2JAFWYD4GECAIXAMJ7YUGZA/bundle.json","state":"https://pith.science/pith/QIP2JAFWYD4GECAIXAMJ7YUGZA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QIP2JAFWYD4GECAIXAMJ7YUGZA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:QIP2JAFWYD4GECAIXAMJ7YUGZA","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":"d300ecba83fba3713a0df058b0d59294b3e109e5086cef4c5aecc17f4b816db6","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-10-27T08:31:07Z","title_canon_sha256":"aa4b75481b87f8903abde8823b1c375fec3c20e3dd3a44986819e01374012d40"},"schema_version":"1.0","source":{"id":"1110.6009","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1110.6009","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"arxiv_version","alias_value":"1110.6009v1","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1110.6009","created_at":"2026-05-18T03:54:47Z"},{"alias_kind":"pith_short_12","alias_value":"QIP2JAFWYD4G","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_16","alias_value":"QIP2JAFWYD4GECAI","created_at":"2026-05-18T12:26:39Z"},{"alias_kind":"pith_short_8","alias_value":"QIP2JAFW","created_at":"2026-05-18T12:26:39Z"}],"graph_snapshots":[{"event_id":"sha256:9eb532590425506c128dadd1f1445a4aee18c481b86a5f5dbafd4beffda0a530","target":"graph","created_at":"2026-05-18T03:54:47Z","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 have studied the adsorption of bisphenol-A-polycarbonate (BPA-PC) on the alpha-Al2O3(0001) surface using density-functional theory (DFT) with van der Waals (vdW) corrections. The BPA-PC polymer can be divided into its chemical fragments which are phenylene, carbonate and isopropylidene groups. We have calculated the adsorption energy and geometry of the BPA-PC segments that consist of two to three adjacent groups of the polymer. Our DFT results show that the adsorption is dominated by the vdW interaction. It is also important to include the interaction of nearest-neighbor groups in order to","authors_text":"Janne Blomqvist, Petri Salo","cross_cats":["physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-10-27T08:31:07Z","title":"First-principles study for the adsorption of segments of BPA-PC on alpha-Al2O3(0001)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1110.6009","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:b662e049a68988d51bee6a0e1f854091fa2886c85f477135d08e176387318392","target":"record","created_at":"2026-05-18T03:54:47Z","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":"d300ecba83fba3713a0df058b0d59294b3e109e5086cef4c5aecc17f4b816db6","cross_cats_sorted":["physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-10-27T08:31:07Z","title_canon_sha256":"aa4b75481b87f8903abde8823b1c375fec3c20e3dd3a44986819e01374012d40"},"schema_version":"1.0","source":{"id":"1110.6009","kind":"arxiv","version":1}},"canonical_sha256":"821fa480b6c0f8620808b8189fe286c8258642005e5554c872a122674a1969cc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"821fa480b6c0f8620808b8189fe286c8258642005e5554c872a122674a1969cc","first_computed_at":"2026-05-18T03:54:47.816607Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:54:47.816607Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Yx1gpmFqxqU8Z8/WXR72j0Y9dPSvCyYV2K8/KQUU4du7uN8DhIJNNI56bN4tRKgGcEX5UBaeJGldng0/wfIxBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:54:47.817289Z","signed_message":"canonical_sha256_bytes"},"source_id":"1110.6009","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b662e049a68988d51bee6a0e1f854091fa2886c85f477135d08e176387318392","sha256:9eb532590425506c128dadd1f1445a4aee18c481b86a5f5dbafd4beffda0a530"],"state_sha256":"bd06497f6f3a499b8f48328a15fd932579b29c113776ab4ac85a0ca4a6aa7a59"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ugLFHHSEDALPhkBfTJZ/0OEPo4ggF/kIeLnBfoNId3hG4aG6Tsrz3E2erlvVI8GIgNCGpar1+trLK3pDB6KfBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-28T04:33:22.731026Z","bundle_sha256":"919a37f1c925c0c3604355e00a06b572d5f7301da76f69a6a844e2a88b3ab607"}}