{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:GJQDIVG7GPY4IPRXIBBZV7WLNQ","short_pith_number":"pith:GJQDIVG7","canonical_record":{"source":{"id":"1401.2352","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-01-03T19:38:59Z","cross_cats_sorted":[],"title_canon_sha256":"759e43146924d8e7d9ac41bb6ff7dc13363629aff3a93391201bbb671973f8fa","abstract_canon_sha256":"e434b7e4ed1e4d19addd1033e83c9f82fd2c22fc62962bc5ed313da586d069eb"},"schema_version":"1.0"},"canonical_sha256":"32603454df33f1c43e3740439afecb6c368413313fae05a318622fb05b914b5b","source":{"kind":"arxiv","id":"1401.2352","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.2352","created_at":"2026-05-18T03:02:45Z"},{"alias_kind":"arxiv_version","alias_value":"1401.2352v1","created_at":"2026-05-18T03:02:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.2352","created_at":"2026-05-18T03:02:45Z"},{"alias_kind":"pith_short_12","alias_value":"GJQDIVG7GPY4","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"GJQDIVG7GPY4IPRX","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"GJQDIVG7","created_at":"2026-05-18T12:28:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:GJQDIVG7GPY4IPRXIBBZV7WLNQ","target":"record","payload":{"canonical_record":{"source":{"id":"1401.2352","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-01-03T19:38:59Z","cross_cats_sorted":[],"title_canon_sha256":"759e43146924d8e7d9ac41bb6ff7dc13363629aff3a93391201bbb671973f8fa","abstract_canon_sha256":"e434b7e4ed1e4d19addd1033e83c9f82fd2c22fc62962bc5ed313da586d069eb"},"schema_version":"1.0"},"canonical_sha256":"32603454df33f1c43e3740439afecb6c368413313fae05a318622fb05b914b5b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:02:45.497276Z","signature_b64":"NB/ysleaEc7yvYoolOStFGl8uktro/aClhxqZ19InQv6fkgFbdl6ujK9zmVDfOPxrFPPWX8zMvnX5h3SCR0tDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"32603454df33f1c43e3740439afecb6c368413313fae05a318622fb05b914b5b","last_reissued_at":"2026-05-18T03:02:45.496703Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:02:45.496703Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1401.2352","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":"2026-05-18T03:02:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aSSeNe+g3i8rlIIvxFAYs904Ho70Og8dLwQtP5bp9qF+MFNb/u5375keatATs5r2GNRG1Btb3B6RltXfCeqqAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T06:23:07.208761Z"},"content_sha256":"a66737416b8452be5cb3b86b7b239e20c2cccfe3ecb9df75d017056885bd1938","schema_version":"1.0","event_id":"sha256:a66737416b8452be5cb3b86b7b239e20c2cccfe3ecb9df75d017056885bd1938"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:GJQDIVG7GPY4IPRXIBBZV7WLNQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Extreme ultraviolet radiation induced defects in single-layer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Gao, C.J. Lee, E. Zoethout, F. Bijkerk, J.M. Sturm","submitted_at":"2014-01-03T19:38:59Z","abstract_excerpt":"We study extreme ultraviolet (EUV) radiation induced defects in single-layer graphene. Two mechanisms for inducing defects in graphene were separately investigated: photon induced chemical reactions between graphene and background residual gases, and disrupting the network of sp2 bonds, due to photon and/or photoelectrons induced bond cleaving. Raman spectroscopy shows that D peak intensities grow after EUV irradiation with increasing water partial pressure in the exposure chamber. Temperature-programmed desorption (TPD) experiments prove that EUV radiation results in water dissociation on the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.2352","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":"2026-05-18T03:02:45Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sD/En54FflrmlkyCje7h7k39TAMYUJHQ311GDzMFq1B5gU3MWxlT5PFbDt15zl5CO00snOJ1h2j0OSDMvMPFAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-24T06:23:07.209110Z"},"content_sha256":"5186b9319772ae1b7ce3d52b70522f9f04d9735a69c79fa5398d984df4440f57","schema_version":"1.0","event_id":"sha256:5186b9319772ae1b7ce3d52b70522f9f04d9735a69c79fa5398d984df4440f57"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GJQDIVG7GPY4IPRXIBBZV7WLNQ/bundle.json","state_url":"https://pith.science/pith/GJQDIVG7GPY4IPRXIBBZV7WLNQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GJQDIVG7GPY4IPRXIBBZV7WLNQ/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":"2026-05-24T06:23:07Z","links":{"resolver":"https://pith.science/pith/GJQDIVG7GPY4IPRXIBBZV7WLNQ","bundle":"https://pith.science/pith/GJQDIVG7GPY4IPRXIBBZV7WLNQ/bundle.json","state":"https://pith.science/pith/GJQDIVG7GPY4IPRXIBBZV7WLNQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GJQDIVG7GPY4IPRXIBBZV7WLNQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:GJQDIVG7GPY4IPRXIBBZV7WLNQ","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":"e434b7e4ed1e4d19addd1033e83c9f82fd2c22fc62962bc5ed313da586d069eb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-01-03T19:38:59Z","title_canon_sha256":"759e43146924d8e7d9ac41bb6ff7dc13363629aff3a93391201bbb671973f8fa"},"schema_version":"1.0","source":{"id":"1401.2352","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.2352","created_at":"2026-05-18T03:02:45Z"},{"alias_kind":"arxiv_version","alias_value":"1401.2352v1","created_at":"2026-05-18T03:02:45Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.2352","created_at":"2026-05-18T03:02:45Z"},{"alias_kind":"pith_short_12","alias_value":"GJQDIVG7GPY4","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_16","alias_value":"GJQDIVG7GPY4IPRX","created_at":"2026-05-18T12:28:30Z"},{"alias_kind":"pith_short_8","alias_value":"GJQDIVG7","created_at":"2026-05-18T12:28:30Z"}],"graph_snapshots":[{"event_id":"sha256:5186b9319772ae1b7ce3d52b70522f9f04d9735a69c79fa5398d984df4440f57","target":"graph","created_at":"2026-05-18T03:02:45Z","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 study extreme ultraviolet (EUV) radiation induced defects in single-layer graphene. Two mechanisms for inducing defects in graphene were separately investigated: photon induced chemical reactions between graphene and background residual gases, and disrupting the network of sp2 bonds, due to photon and/or photoelectrons induced bond cleaving. Raman spectroscopy shows that D peak intensities grow after EUV irradiation with increasing water partial pressure in the exposure chamber. Temperature-programmed desorption (TPD) experiments prove that EUV radiation results in water dissociation on the","authors_text":"A. Gao, C.J. Lee, E. Zoethout, F. Bijkerk, J.M. Sturm","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-01-03T19:38:59Z","title":"Extreme ultraviolet radiation induced defects in single-layer graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.2352","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:a66737416b8452be5cb3b86b7b239e20c2cccfe3ecb9df75d017056885bd1938","target":"record","created_at":"2026-05-18T03:02:45Z","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":"e434b7e4ed1e4d19addd1033e83c9f82fd2c22fc62962bc5ed313da586d069eb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-01-03T19:38:59Z","title_canon_sha256":"759e43146924d8e7d9ac41bb6ff7dc13363629aff3a93391201bbb671973f8fa"},"schema_version":"1.0","source":{"id":"1401.2352","kind":"arxiv","version":1}},"canonical_sha256":"32603454df33f1c43e3740439afecb6c368413313fae05a318622fb05b914b5b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"32603454df33f1c43e3740439afecb6c368413313fae05a318622fb05b914b5b","first_computed_at":"2026-05-18T03:02:45.496703Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:02:45.496703Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NB/ysleaEc7yvYoolOStFGl8uktro/aClhxqZ19InQv6fkgFbdl6ujK9zmVDfOPxrFPPWX8zMvnX5h3SCR0tDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:02:45.497276Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.2352","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a66737416b8452be5cb3b86b7b239e20c2cccfe3ecb9df75d017056885bd1938","sha256:5186b9319772ae1b7ce3d52b70522f9f04d9735a69c79fa5398d984df4440f57"],"state_sha256":"74ca86e489cd778a068c0f3d5dae9b758bc83dfebc2a11435649f75446744ca2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sPr1T3sFgZmCqppuKZeUoYuESzbrPo+MItNDr7E2BoQRimGHqcp74WMXBXt8RHH+bUknMwCzSY0iPcNfEIOtCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-24T06:23:07.211428Z","bundle_sha256":"92b2ee1df617f7d64b7bde41a093845ae88343324c274307fd34e573bda1dcdc"}}