{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:7K3KMJ5ABC6BIMOJS2IX7HOA7P","short_pith_number":"pith:7K3KMJ5A","canonical_record":{"source":{"id":"1604.08815","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-04-29T13:05:59Z","cross_cats_sorted":[],"title_canon_sha256":"3b4ab6474b4b814e3c1af1c599ba89885dc859850324d2406dd7cf9f233d3e7a","abstract_canon_sha256":"3ac5feae74ec6cc06203ca3e8f5ab2bc04cb60686df33e658f954d2527a93d78"},"schema_version":"1.0"},"canonical_sha256":"fab6a627a008bc1431c996917f9dc0fbe532a4804ea21a8a08d7a6e011129ac7","source":{"kind":"arxiv","id":"1604.08815","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08815","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08815v1","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08815","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"pith_short_12","alias_value":"7K3KMJ5ABC6B","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7K3KMJ5ABC6BIMOJ","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7K3KMJ5A","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:7K3KMJ5ABC6BIMOJS2IX7HOA7P","target":"record","payload":{"canonical_record":{"source":{"id":"1604.08815","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-04-29T13:05:59Z","cross_cats_sorted":[],"title_canon_sha256":"3b4ab6474b4b814e3c1af1c599ba89885dc859850324d2406dd7cf9f233d3e7a","abstract_canon_sha256":"3ac5feae74ec6cc06203ca3e8f5ab2bc04cb60686df33e658f954d2527a93d78"},"schema_version":"1.0"},"canonical_sha256":"fab6a627a008bc1431c996917f9dc0fbe532a4804ea21a8a08d7a6e011129ac7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:01.657878Z","signature_b64":"2BxTmy684NltEsmyQxMFPc70bCrC2/2OFs8W63HIp/3hMBJ/q4QmOGg5BAa/zMStCW/U+ZwGy5/ntNQmzKQuCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fab6a627a008bc1431c996917f9dc0fbe532a4804ea21a8a08d7a6e011129ac7","last_reissued_at":"2026-05-18T01:16:01.657294Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:01.657294Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.08815","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":"2026-05-18T01:16:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NqNDyg11M6W1hhDRCUkE0wZHjXvHUC5NxwGh7+kdK1SlxcEVh+OYDxkadQowNRilQ36f8ai6OR3gEWRRB7zHCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T07:13:02.627434Z"},"content_sha256":"e1f6fa16f57eb9c61c84a234c9449fc120ead3b8e4f22ec5256e91c5a8bc5a29","schema_version":"1.0","event_id":"sha256:e1f6fa16f57eb9c61c84a234c9449fc120ead3b8e4f22ec5256e91c5a8bc5a29"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:7K3KMJ5ABC6BIMOJS2IX7HOA7P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Etching Processes of Polytetrafluoroethylene Surfaces Exposed to He and He-O2 Atmospheric Post-discharges","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.plasm-ph","authors_text":"F Reniers, J Hubert, Nicolas Vandencasteele, Roberto Lazzaroni, Simon Desbief, Thierry Dufour","submitted_at":"2016-04-29T13:05:59Z","abstract_excerpt":"A comparative study of polytetrafluoroethylene (PTFE) surfaces treated by the post-discharge of He and He-O2 plasmas at atmospheric pressure is presented. The characterization of treated PTFE surfaces and the species involved in the surface modification are related. In pure He plasmas, no significant change of the surface has been observed by X-ray photoelectron spectroscopy (XPS), dynamic water contact angles (dWCA) and atomic force microscopy (AFM), in spite of important mass losses recorded. According to these observations, a layer-by-layer physical etching without any preferential orientat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08815","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":"2026-05-18T01:16:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HRsU6UBGxcSQkQST4o2r/fPBga0CXTXJbsQNpjYf2QnN6EQ9qMEi8fTA+ACY54IDtoQWnaKiPYyhXzfOcx2uCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T07:13:02.628178Z"},"content_sha256":"d2dde0f140699d0d616e2d9d76e04600549267463a57e9a71baa42df31373710","schema_version":"1.0","event_id":"sha256:d2dde0f140699d0d616e2d9d76e04600549267463a57e9a71baa42df31373710"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7K3KMJ5ABC6BIMOJS2IX7HOA7P/bundle.json","state_url":"https://pith.science/pith/7K3KMJ5ABC6BIMOJS2IX7HOA7P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7K3KMJ5ABC6BIMOJS2IX7HOA7P/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":"2026-06-09T07:13:02Z","links":{"resolver":"https://pith.science/pith/7K3KMJ5ABC6BIMOJS2IX7HOA7P","bundle":"https://pith.science/pith/7K3KMJ5ABC6BIMOJS2IX7HOA7P/bundle.json","state":"https://pith.science/pith/7K3KMJ5ABC6BIMOJS2IX7HOA7P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7K3KMJ5ABC6BIMOJS2IX7HOA7P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7K3KMJ5ABC6BIMOJS2IX7HOA7P","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":"3ac5feae74ec6cc06203ca3e8f5ab2bc04cb60686df33e658f954d2527a93d78","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-04-29T13:05:59Z","title_canon_sha256":"3b4ab6474b4b814e3c1af1c599ba89885dc859850324d2406dd7cf9f233d3e7a"},"schema_version":"1.0","source":{"id":"1604.08815","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.08815","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"arxiv_version","alias_value":"1604.08815v1","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.08815","created_at":"2026-05-18T01:16:01Z"},{"alias_kind":"pith_short_12","alias_value":"7K3KMJ5ABC6B","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7K3KMJ5ABC6BIMOJ","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7K3KMJ5A","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:d2dde0f140699d0d616e2d9d76e04600549267463a57e9a71baa42df31373710","target":"graph","created_at":"2026-05-18T01:16:01Z","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 comparative study of polytetrafluoroethylene (PTFE) surfaces treated by the post-discharge of He and He-O2 plasmas at atmospheric pressure is presented. The characterization of treated PTFE surfaces and the species involved in the surface modification are related. In pure He plasmas, no significant change of the surface has been observed by X-ray photoelectron spectroscopy (XPS), dynamic water contact angles (dWCA) and atomic force microscopy (AFM), in spite of important mass losses recorded. According to these observations, a layer-by-layer physical etching without any preferential orientat","authors_text":"F Reniers, J Hubert, Nicolas Vandencasteele, Roberto Lazzaroni, Simon Desbief, Thierry Dufour","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-04-29T13:05:59Z","title":"Etching Processes of Polytetrafluoroethylene Surfaces Exposed to He and He-O2 Atmospheric Post-discharges"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.08815","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:e1f6fa16f57eb9c61c84a234c9449fc120ead3b8e4f22ec5256e91c5a8bc5a29","target":"record","created_at":"2026-05-18T01:16:01Z","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":"3ac5feae74ec6cc06203ca3e8f5ab2bc04cb60686df33e658f954d2527a93d78","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.plasm-ph","submitted_at":"2016-04-29T13:05:59Z","title_canon_sha256":"3b4ab6474b4b814e3c1af1c599ba89885dc859850324d2406dd7cf9f233d3e7a"},"schema_version":"1.0","source":{"id":"1604.08815","kind":"arxiv","version":1}},"canonical_sha256":"fab6a627a008bc1431c996917f9dc0fbe532a4804ea21a8a08d7a6e011129ac7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fab6a627a008bc1431c996917f9dc0fbe532a4804ea21a8a08d7a6e011129ac7","first_computed_at":"2026-05-18T01:16:01.657294Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:01.657294Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2BxTmy684NltEsmyQxMFPc70bCrC2/2OFs8W63HIp/3hMBJ/q4QmOGg5BAa/zMStCW/U+ZwGy5/ntNQmzKQuCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:01.657878Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.08815","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e1f6fa16f57eb9c61c84a234c9449fc120ead3b8e4f22ec5256e91c5a8bc5a29","sha256:d2dde0f140699d0d616e2d9d76e04600549267463a57e9a71baa42df31373710"],"state_sha256":"f7a808886a79096245dc5c2088b16137184917b2e3ccc097e6bd34ad2d57247a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m/KhnQNmvdl3whzFTdquVA6pgBVUWSt4qHV1p0Iin8/tQoDe0FYzQMBxobn4TKtHi6sXTYScb5dNg5GkmaoWDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T07:13:02.632085Z","bundle_sha256":"84800a780e61c66e2e7aa9913cf75c75424d5d26b191f9522ec14ffe906bfafe"}}