{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:QKD7XJONZVRIVMKHTT5XFTOSJV","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":"080d8b252d60a0ad835835678456ce2f091f2e2595e7608357ef68c53793a227","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-05-05T04:22:22Z","title_canon_sha256":"69e30b434b3e4b9a33792a84ab30e99cac73f41f34d8e1aa8abae2b306959392"},"schema_version":"1.0","source":{"id":"1505.00878","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.00878","created_at":"2026-05-18T02:16:59Z"},{"alias_kind":"arxiv_version","alias_value":"1505.00878v1","created_at":"2026-05-18T02:16:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.00878","created_at":"2026-05-18T02:16:59Z"},{"alias_kind":"pith_short_12","alias_value":"QKD7XJONZVRI","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_16","alias_value":"QKD7XJONZVRIVMKH","created_at":"2026-05-18T12:29:37Z"},{"alias_kind":"pith_short_8","alias_value":"QKD7XJON","created_at":"2026-05-18T12:29:37Z"}],"graph_snapshots":[{"event_id":"sha256:448e33aa8fa1d202a32faf1dd24857842a8e9f7053d81c3a7222c76ee939776c","target":"graph","created_at":"2026-05-18T02:16:59Z","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":"Solution dispersions of two-dimensional (2D) black phosphorus (BP), often referred to as phosphorene, are achieved by solvent exfoliation. These pristine, electronic-grade BP dispersions are produced with anhydrous, organic solvents in a sealed tip ultrasonication system, which circumvents BP degradation that would otherwise occur via solvated oxygen or water. Among conventional solvents, n-methyl-pyrrolidone (NMP) is found to provide stable, highly concentrated (~0.4 mg/mL) BP dispersions. Atomic force microscopy, scanning electron microscopy, transmission electron microscopy, Raman spectrosc","authors_text":"Jae-Hyeok Lee, Joohoon Kang, Joshua D. Wood, Kan-Sheng Chen, Mark C. Hersam, Spencer A. Wells, Xiaolong Liu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-05-05T04:22:22Z","title":"Solvent Exfoliation of Electronic-Grade, Two-Dimensional Black Phosphorus"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.00878","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":"sha256:046272f585f332661c8a9bd7df6fbd90f7083592070007d3b1ece43837305ad7","target":"record","created_at":"2026-05-18T02:16:59Z","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":"080d8b252d60a0ad835835678456ce2f091f2e2595e7608357ef68c53793a227","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2015-05-05T04:22:22Z","title_canon_sha256":"69e30b434b3e4b9a33792a84ab30e99cac73f41f34d8e1aa8abae2b306959392"},"schema_version":"1.0","source":{"id":"1505.00878","kind":"arxiv","version":1}},"canonical_sha256":"8287fba5cdcd628ab1479cfb72cdd24d60630b924c3cc546a46df1cbd40d9d2f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8287fba5cdcd628ab1479cfb72cdd24d60630b924c3cc546a46df1cbd40d9d2f","first_computed_at":"2026-05-18T02:16:59.724527Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:16:59.724527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FOGbYrwb9glTYWkgDks9p/uIBJX+YCYgEP4j9QGgDDirp4kWrPNUe/S+OmJI9hW8JfR8SakOyFdlbKFBIIVmBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:16:59.725190Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.00878","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:046272f585f332661c8a9bd7df6fbd90f7083592070007d3b1ece43837305ad7","sha256:448e33aa8fa1d202a32faf1dd24857842a8e9f7053d81c3a7222c76ee939776c"],"state_sha256":"c00de5b28bb88ffba454d8933e09fdef3a9c111a4cb5586a8eca6461ef5c7fec"}