{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:ZBZLXVSQYD3K6JBZ7LNHJMNMWI","short_pith_number":"pith:ZBZLXVSQ","canonical_record":{"source":{"id":"1911.00855","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-11-03T09:36:17Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"094b0f1a324d38c04565e93fd37b79b40e42209d9ece86c601c231e4861c3710","abstract_canon_sha256":"906e18a494fc92d631d69453b3e8f1672b61324bd8dffaaadab7c7b6a8e555f5"},"schema_version":"1.0"},"canonical_sha256":"c872bbd650c0f6af2439fada74b1acb227ad97e86358614bf0a8076089207c40","source":{"kind":"arxiv","id":"1911.00855","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.00855","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"arxiv_version","alias_value":"1911.00855v1","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.00855","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"pith_short_12","alias_value":"ZBZLXVSQYD3K","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"pith_short_16","alias_value":"ZBZLXVSQYD3K6JBZ","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"pith_short_8","alias_value":"ZBZLXVSQ","created_at":"2026-07-05T00:16:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:ZBZLXVSQYD3K6JBZ7LNHJMNMWI","target":"record","payload":{"canonical_record":{"source":{"id":"1911.00855","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-11-03T09:36:17Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"094b0f1a324d38c04565e93fd37b79b40e42209d9ece86c601c231e4861c3710","abstract_canon_sha256":"906e18a494fc92d631d69453b3e8f1672b61324bd8dffaaadab7c7b6a8e555f5"},"schema_version":"1.0"},"canonical_sha256":"c872bbd650c0f6af2439fada74b1acb227ad97e86358614bf0a8076089207c40","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:16:43.433881Z","signature_b64":"LvoFVd7GDy/6QlFByeRiQ0MNenTKBB0V8EYVzBWRRS6+7kIiX4agXqDDHd6nqCyR/jiovA8w8MqXm2pYbCt0DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c872bbd650c0f6af2439fada74b1acb227ad97e86358614bf0a8076089207c40","last_reissued_at":"2026-07-05T00:16:43.433535Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:16:43.433535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.00855","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":"2026-07-05T00:16:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UWDleSiu81X7dV/gohr/bsT5Hn9wQWUjHHVaEH0bK37bTdMf8F2yHEv1TUMQGwNJH6B18FXZGWvUn1NNssTxDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T17:24:01.544115Z"},"content_sha256":"19078883081d959250d53161f01a633f61a8bb82895057c9e97db20b84859669","schema_version":"1.0","event_id":"sha256:19078883081d959250d53161f01a633f61a8bb82895057c9e97db20b84859669"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:ZBZLXVSQYD3K6JBZ7LNHJMNMWI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"PMMA-grafted graphene nanoplatelets to reinforce the mechanical and thermal properties of PMMA composites","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"Ben F. Spencer, Cristina Vall\\'es, Dimitrios G. Papageorgiou, Fei Lin, Ian A. Kinloch, Robert J. Young, Zheling Li","submitted_at":"2019-11-03T09:36:17Z","abstract_excerpt":"In order to realise the potential of graphene nanocomposites it is vital to control the degree of dispersion and achieve a strong graphene polymer interface. Herein, we developed a facile grafting to functionalisation approach for graphene nanoplatelets. NH2-terminated graphene nanoplatelets, NH2 GNPs, prepared by a diazonium coupling were used as a platform to covalently graft PMMA chains to the surface of graphene through an amidation between the NH2 groups and PMMA chains, PMMA NH GNPs. A degree of PMMA grafting of 3.8 wt, one chain per 40 carbon atoms, was found to both improve the dispers"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.00855","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.00855/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:16:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"snVUYv3n7K/mWIyUbnuVl2HYthz9UeFdRNNqfelk5RcX5+QaG3ybL2AwBaiwyA2pk/wxorfO5Hxp56UA5umGCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T17:24:01.545107Z"},"content_sha256":"0ce2bedb7f355f9d1158d9a213f7a578cd4aeb574db12d34d8c5e81c6932da06","schema_version":"1.0","event_id":"sha256:0ce2bedb7f355f9d1158d9a213f7a578cd4aeb574db12d34d8c5e81c6932da06"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZBZLXVSQYD3K6JBZ7LNHJMNMWI/bundle.json","state_url":"https://pith.science/pith/ZBZLXVSQYD3K6JBZ7LNHJMNMWI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZBZLXVSQYD3K6JBZ7LNHJMNMWI/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":"2026-08-06T17:24:01Z","links":{"resolver":"https://pith.science/pith/ZBZLXVSQYD3K6JBZ7LNHJMNMWI","bundle":"https://pith.science/pith/ZBZLXVSQYD3K6JBZ7LNHJMNMWI/bundle.json","state":"https://pith.science/pith/ZBZLXVSQYD3K6JBZ7LNHJMNMWI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZBZLXVSQYD3K6JBZ7LNHJMNMWI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:ZBZLXVSQYD3K6JBZ7LNHJMNMWI","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":"906e18a494fc92d631d69453b3e8f1672b61324bd8dffaaadab7c7b6a8e555f5","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-11-03T09:36:17Z","title_canon_sha256":"094b0f1a324d38c04565e93fd37b79b40e42209d9ece86c601c231e4861c3710"},"schema_version":"1.0","source":{"id":"1911.00855","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.00855","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"arxiv_version","alias_value":"1911.00855v1","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.00855","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"pith_short_12","alias_value":"ZBZLXVSQYD3K","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"pith_short_16","alias_value":"ZBZLXVSQYD3K6JBZ","created_at":"2026-07-05T00:16:43Z"},{"alias_kind":"pith_short_8","alias_value":"ZBZLXVSQ","created_at":"2026-07-05T00:16:43Z"}],"graph_snapshots":[{"event_id":"sha256:0ce2bedb7f355f9d1158d9a213f7a578cd4aeb574db12d34d8c5e81c6932da06","target":"graph","created_at":"2026-07-05T00:16:43Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1911.00855/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In order to realise the potential of graphene nanocomposites it is vital to control the degree of dispersion and achieve a strong graphene polymer interface. Herein, we developed a facile grafting to functionalisation approach for graphene nanoplatelets. NH2-terminated graphene nanoplatelets, NH2 GNPs, prepared by a diazonium coupling were used as a platform to covalently graft PMMA chains to the surface of graphene through an amidation between the NH2 groups and PMMA chains, PMMA NH GNPs. A degree of PMMA grafting of 3.8 wt, one chain per 40 carbon atoms, was found to both improve the dispers","authors_text":"Ben F. Spencer, Cristina Vall\\'es, Dimitrios G. Papageorgiou, Fei Lin, Ian A. Kinloch, Robert J. Young, Zheling Li","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-11-03T09:36:17Z","title":"PMMA-grafted graphene nanoplatelets to reinforce the mechanical and thermal properties of PMMA composites"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.00855","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":"sha256:19078883081d959250d53161f01a633f61a8bb82895057c9e97db20b84859669","target":"record","created_at":"2026-07-05T00:16:43Z","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":"906e18a494fc92d631d69453b3e8f1672b61324bd8dffaaadab7c7b6a8e555f5","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-11-03T09:36:17Z","title_canon_sha256":"094b0f1a324d38c04565e93fd37b79b40e42209d9ece86c601c231e4861c3710"},"schema_version":"1.0","source":{"id":"1911.00855","kind":"arxiv","version":1}},"canonical_sha256":"c872bbd650c0f6af2439fada74b1acb227ad97e86358614bf0a8076089207c40","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c872bbd650c0f6af2439fada74b1acb227ad97e86358614bf0a8076089207c40","first_computed_at":"2026-07-05T00:16:43.433535Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:16:43.433535Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LvoFVd7GDy/6QlFByeRiQ0MNenTKBB0V8EYVzBWRRS6+7kIiX4agXqDDHd6nqCyR/jiovA8w8MqXm2pYbCt0DA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:16:43.433881Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.00855","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:19078883081d959250d53161f01a633f61a8bb82895057c9e97db20b84859669","sha256:0ce2bedb7f355f9d1158d9a213f7a578cd4aeb574db12d34d8c5e81c6932da06"],"state_sha256":"54d02e9afc656bd9387ae60bf32f05812e786b574b73719b826f068a15b948f6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yjAnGuP4ymOQ1LUl1BZPk1G1n/rK0O/y37ugOCOeRSKmxXKvM5KBKxkuTKeUD2VztkUM5e0Z8pJmU0IivIsHBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T17:24:01.553038Z","bundle_sha256":"0eeef177a962c14d16f0de4336524330e3cb34a7ec24b669ec86eaeeccdb87f8"}}