{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:YALSQPW2MGJX73KWJNGV7VXQA7","short_pith_number":"pith:YALSQPW2","canonical_record":{"source":{"id":"1605.09724","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2016-05-02T23:17:20Z","cross_cats_sorted":[],"title_canon_sha256":"ac9fd56e4707eca72af16e14180e300c1ffa56819b98fa4fe9c8949296edeef9","abstract_canon_sha256":"9040e4853c567b79d9364b7e98522d4723183becb92e259e5401b3b50975b5c7"},"schema_version":"1.0"},"canonical_sha256":"c017283eda61937fed564b4d5fd6f007c3eb39c9cf7a29fd08753ad551cf688c","source":{"kind":"arxiv","id":"1605.09724","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.09724","created_at":"2026-05-18T01:13:10Z"},{"alias_kind":"arxiv_version","alias_value":"1605.09724v1","created_at":"2026-05-18T01:13:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.09724","created_at":"2026-05-18T01:13:10Z"},{"alias_kind":"pith_short_12","alias_value":"YALSQPW2MGJX","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YALSQPW2MGJX73KW","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YALSQPW2","created_at":"2026-05-18T12:30:53Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:YALSQPW2MGJX73KWJNGV7VXQA7","target":"record","payload":{"canonical_record":{"source":{"id":"1605.09724","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2016-05-02T23:17:20Z","cross_cats_sorted":[],"title_canon_sha256":"ac9fd56e4707eca72af16e14180e300c1ffa56819b98fa4fe9c8949296edeef9","abstract_canon_sha256":"9040e4853c567b79d9364b7e98522d4723183becb92e259e5401b3b50975b5c7"},"schema_version":"1.0"},"canonical_sha256":"c017283eda61937fed564b4d5fd6f007c3eb39c9cf7a29fd08753ad551cf688c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:10.279187Z","signature_b64":"JGEAIj3wojNd9Q69tMD/thKk9Nz54HgVNevgjSUfqRXG4TpIpUb1nG+d4jsWX5ihLGfqFSUmxgo6rLOzmIiSAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c017283eda61937fed564b4d5fd6f007c3eb39c9cf7a29fd08753ad551cf688c","last_reissued_at":"2026-05-18T01:13:10.278788Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:10.278788Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1605.09724","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":"2026-05-18T01:13:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"650IfAQ4U4LONrSUHuNbPaesbNtHJ2Z3Pe+0mf97J4xMjVfNUryreV4r5Ll1ZDHCwB191TjjA/s1huqUIE+zAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:21:08.804418Z"},"content_sha256":"162e47970ba938bf4eb31aa362b4448755a3b6cbafeaf7f560c529128a26a71b","schema_version":"1.0","event_id":"sha256:162e47970ba938bf4eb31aa362b4448755a3b6cbafeaf7f560c529128a26a71b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:YALSQPW2MGJX73KWJNGV7VXQA7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Understanding polyethylene surface functionalization by an atmospheric He-O$_2$ plasma through combined experiments and simulation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"Annemie Bogaerts, Erik C. Neyts, Fran\\c{c}ois Reniers, Johan Minnebo, Sami Abou Rich, Thierry Dufour","submitted_at":"2016-05-02T23:17:20Z","abstract_excerpt":"High density polyethylene surfaces were exposed to the atmospheric post-discharge of a radiofrequency plasma torch supplied in helium and oxygen. Dynamic water contact angle measurements were performed to evaluate changes in surface hydrophilicity and angle resolved x-ray photoelectron spectroscopy was carried out to identify the functional groups responsible for wettability changes and to study their subsurface depth profiles, up to 9 nm in depth. The reactions leading to the formation of C-O, C=O and O-C=O groups were simulated by molecular dynamics. These simulations demonstrate that imping"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.09724","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":"2026-05-18T01:13:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"riuoS7dwhqIUOBIbh0dYkC8E8UNI/PSNav1yqVirUQEiOfVltmVWHp4wc0KEHXyfDCVQ3vrx6suR9499bwLoBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:21:08.804782Z"},"content_sha256":"bc3cd42174c67f3fa7e9c0d581dadae7c8f8cc67eddc2786ba1ffc35e21593c5","schema_version":"1.0","event_id":"sha256:bc3cd42174c67f3fa7e9c0d581dadae7c8f8cc67eddc2786ba1ffc35e21593c5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YALSQPW2MGJX73KWJNGV7VXQA7/bundle.json","state_url":"https://pith.science/pith/YALSQPW2MGJX73KWJNGV7VXQA7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YALSQPW2MGJX73KWJNGV7VXQA7/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":"2026-06-04T05:21:08Z","links":{"resolver":"https://pith.science/pith/YALSQPW2MGJX73KWJNGV7VXQA7","bundle":"https://pith.science/pith/YALSQPW2MGJX73KWJNGV7VXQA7/bundle.json","state":"https://pith.science/pith/YALSQPW2MGJX73KWJNGV7VXQA7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YALSQPW2MGJX73KWJNGV7VXQA7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:YALSQPW2MGJX73KWJNGV7VXQA7","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":"9040e4853c567b79d9364b7e98522d4723183becb92e259e5401b3b50975b5c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2016-05-02T23:17:20Z","title_canon_sha256":"ac9fd56e4707eca72af16e14180e300c1ffa56819b98fa4fe9c8949296edeef9"},"schema_version":"1.0","source":{"id":"1605.09724","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1605.09724","created_at":"2026-05-18T01:13:10Z"},{"alias_kind":"arxiv_version","alias_value":"1605.09724v1","created_at":"2026-05-18T01:13:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1605.09724","created_at":"2026-05-18T01:13:10Z"},{"alias_kind":"pith_short_12","alias_value":"YALSQPW2MGJX","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_16","alias_value":"YALSQPW2MGJX73KW","created_at":"2026-05-18T12:30:53Z"},{"alias_kind":"pith_short_8","alias_value":"YALSQPW2","created_at":"2026-05-18T12:30:53Z"}],"graph_snapshots":[{"event_id":"sha256:bc3cd42174c67f3fa7e9c0d581dadae7c8f8cc67eddc2786ba1ffc35e21593c5","target":"graph","created_at":"2026-05-18T01:13:10Z","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":"High density polyethylene surfaces were exposed to the atmospheric post-discharge of a radiofrequency plasma torch supplied in helium and oxygen. Dynamic water contact angle measurements were performed to evaluate changes in surface hydrophilicity and angle resolved x-ray photoelectron spectroscopy was carried out to identify the functional groups responsible for wettability changes and to study their subsurface depth profiles, up to 9 nm in depth. The reactions leading to the formation of C-O, C=O and O-C=O groups were simulated by molecular dynamics. These simulations demonstrate that imping","authors_text":"Annemie Bogaerts, Erik C. Neyts, Fran\\c{c}ois Reniers, Johan Minnebo, Sami Abou Rich, Thierry Dufour","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2016-05-02T23:17:20Z","title":"Understanding polyethylene surface functionalization by an atmospheric He-O$_2$ plasma through combined experiments and simulation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1605.09724","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":"sha256:162e47970ba938bf4eb31aa362b4448755a3b6cbafeaf7f560c529128a26a71b","target":"record","created_at":"2026-05-18T01:13:10Z","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":"9040e4853c567b79d9364b7e98522d4723183becb92e259e5401b3b50975b5c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2016-05-02T23:17:20Z","title_canon_sha256":"ac9fd56e4707eca72af16e14180e300c1ffa56819b98fa4fe9c8949296edeef9"},"schema_version":"1.0","source":{"id":"1605.09724","kind":"arxiv","version":1}},"canonical_sha256":"c017283eda61937fed564b4d5fd6f007c3eb39c9cf7a29fd08753ad551cf688c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c017283eda61937fed564b4d5fd6f007c3eb39c9cf7a29fd08753ad551cf688c","first_computed_at":"2026-05-18T01:13:10.278788Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:13:10.278788Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JGEAIj3wojNd9Q69tMD/thKk9Nz54HgVNevgjSUfqRXG4TpIpUb1nG+d4jsWX5ihLGfqFSUmxgo6rLOzmIiSAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:13:10.279187Z","signed_message":"canonical_sha256_bytes"},"source_id":"1605.09724","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:162e47970ba938bf4eb31aa362b4448755a3b6cbafeaf7f560c529128a26a71b","sha256:bc3cd42174c67f3fa7e9c0d581dadae7c8f8cc67eddc2786ba1ffc35e21593c5"],"state_sha256":"cecf7345381e1dd56607f4a8d82dfe8d785581fd21023ce83189f3cdb4b40e2f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RMb/mPcN/YqSRUSrMOgAE15GFAhSUEGyn37OWikVaQmuUt9r6eGybP/u2xTtsNeOuny3r45KZY2QfzNPn2p8Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T05:21:08.806820Z","bundle_sha256":"9b8ff32a10f83c5cd75b324d13e49aafe7ed56322c2e6d9bd8ae54ae979d4be7"}}