{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:A6NH2B2SLER4LZS4CKWCWSQGPN","short_pith_number":"pith:A6NH2B2S","canonical_record":{"source":{"id":"1606.06822","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-06-22T05:42:01Z","cross_cats_sorted":[],"title_canon_sha256":"26df79d15d1d26ded74b760783cb3f02c6f27ee0163be7ad45f2cf98ba059e31","abstract_canon_sha256":"5fa0ef9f61249ee6a0ebffec2752a4b601f7c2eebf7d73919c0e5d0f628132ba"},"schema_version":"1.0"},"canonical_sha256":"079a7d07525923c5e65c12ac2b4a067b758b27bd6a3c7a129b469c609fc564bb","source":{"kind":"arxiv","id":"1606.06822","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.06822","created_at":"2026-05-18T01:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"1606.06822v1","created_at":"2026-05-18T01:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.06822","created_at":"2026-05-18T01:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"A6NH2B2SLER4","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"A6NH2B2SLER4LZS4","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"A6NH2B2S","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:A6NH2B2SLER4LZS4CKWCWSQGPN","target":"record","payload":{"canonical_record":{"source":{"id":"1606.06822","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-06-22T05:42:01Z","cross_cats_sorted":[],"title_canon_sha256":"26df79d15d1d26ded74b760783cb3f02c6f27ee0163be7ad45f2cf98ba059e31","abstract_canon_sha256":"5fa0ef9f61249ee6a0ebffec2752a4b601f7c2eebf7d73919c0e5d0f628132ba"},"schema_version":"1.0"},"canonical_sha256":"079a7d07525923c5e65c12ac2b4a067b758b27bd6a3c7a129b469c609fc564bb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:01.033077Z","signature_b64":"CypyrcP9DoQKIl8wtYUxcIU/G818qaM/bW/bh9rHwC7AG+eAeoXJamvmQHbgliyeUx4xTpiaIWZUygIeqxq+AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"079a7d07525923c5e65c12ac2b4a067b758b27bd6a3c7a129b469c609fc564bb","last_reissued_at":"2026-05-18T01:12:01.032690Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:01.032690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.06822","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":"2026-05-18T01:12:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UwroZb+7y0Chf2k1pdVnYdcHj4Fddngq2lm+mR6HFzFfPsoW454OUIS6P8kqZy4rRGI7x5MfvZK0I6dKYuULAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:16:16.352992Z"},"content_sha256":"9c439e8da44038087e685c38e1738fc06722cbf7b0187c57401d0341817440ca","schema_version":"1.0","event_id":"sha256:9c439e8da44038087e685c38e1738fc06722cbf7b0187c57401d0341817440ca"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:A6NH2B2SLER4LZS4CKWCWSQGPN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Hyperpolarized Nanodiamond Surfaces","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"David E.J. Waddington, David J. Reilly, Ewa Rej, Torsten Gaebel","submitted_at":"2016-06-22T05:42:01Z","abstract_excerpt":"The widespread use of nanodiamond as a biomedical platform for drug-delivery, imaging, and sub-cellular tracking applications stems from their non-toxicity and unique quantum mechanical properties. Here, we extend this functionality to the domain of magnetic resonance, by demonstrating that the intrinsic electron spins on the nanodiamond surface can be used to hyperpolarize adsorbed liquid compounds at room temperature. By combining relaxation measurements with hyperpolarization, spins on the surface of the nanodiamond can be distinguished from those in the bulk liquid. These results are likel"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.06822","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":"2026-05-18T01:12:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"As+T+iOlPeLTD7d88ISrw7xM1qgaOF80uboyA5KwVl/C6PkZjhkMdLibGSejPRah91xxeJI61ce7RgQoMfe3BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T13:16:16.353431Z"},"content_sha256":"ffe58627a751396735fcfc2b2d256d0311e8a622d82738a9839302239e949bb1","schema_version":"1.0","event_id":"sha256:ffe58627a751396735fcfc2b2d256d0311e8a622d82738a9839302239e949bb1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/A6NH2B2SLER4LZS4CKWCWSQGPN/bundle.json","state_url":"https://pith.science/pith/A6NH2B2SLER4LZS4CKWCWSQGPN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/A6NH2B2SLER4LZS4CKWCWSQGPN/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":"2026-05-30T13:16:16Z","links":{"resolver":"https://pith.science/pith/A6NH2B2SLER4LZS4CKWCWSQGPN","bundle":"https://pith.science/pith/A6NH2B2SLER4LZS4CKWCWSQGPN/bundle.json","state":"https://pith.science/pith/A6NH2B2SLER4LZS4CKWCWSQGPN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/A6NH2B2SLER4LZS4CKWCWSQGPN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:A6NH2B2SLER4LZS4CKWCWSQGPN","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":"5fa0ef9f61249ee6a0ebffec2752a4b601f7c2eebf7d73919c0e5d0f628132ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-06-22T05:42:01Z","title_canon_sha256":"26df79d15d1d26ded74b760783cb3f02c6f27ee0163be7ad45f2cf98ba059e31"},"schema_version":"1.0","source":{"id":"1606.06822","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.06822","created_at":"2026-05-18T01:12:01Z"},{"alias_kind":"arxiv_version","alias_value":"1606.06822v1","created_at":"2026-05-18T01:12:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.06822","created_at":"2026-05-18T01:12:01Z"},{"alias_kind":"pith_short_12","alias_value":"A6NH2B2SLER4","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"A6NH2B2SLER4LZS4","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"A6NH2B2S","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:ffe58627a751396735fcfc2b2d256d0311e8a622d82738a9839302239e949bb1","target":"graph","created_at":"2026-05-18T01:12:01Z","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":"The widespread use of nanodiamond as a biomedical platform for drug-delivery, imaging, and sub-cellular tracking applications stems from their non-toxicity and unique quantum mechanical properties. Here, we extend this functionality to the domain of magnetic resonance, by demonstrating that the intrinsic electron spins on the nanodiamond surface can be used to hyperpolarize adsorbed liquid compounds at room temperature. By combining relaxation measurements with hyperpolarization, spins on the surface of the nanodiamond can be distinguished from those in the bulk liquid. These results are likel","authors_text":"David E.J. Waddington, David J. Reilly, Ewa Rej, Torsten Gaebel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-06-22T05:42:01Z","title":"Hyperpolarized Nanodiamond Surfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.06822","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":"sha256:9c439e8da44038087e685c38e1738fc06722cbf7b0187c57401d0341817440ca","target":"record","created_at":"2026-05-18T01:12:01Z","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":"5fa0ef9f61249ee6a0ebffec2752a4b601f7c2eebf7d73919c0e5d0f628132ba","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-06-22T05:42:01Z","title_canon_sha256":"26df79d15d1d26ded74b760783cb3f02c6f27ee0163be7ad45f2cf98ba059e31"},"schema_version":"1.0","source":{"id":"1606.06822","kind":"arxiv","version":1}},"canonical_sha256":"079a7d07525923c5e65c12ac2b4a067b758b27bd6a3c7a129b469c609fc564bb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"079a7d07525923c5e65c12ac2b4a067b758b27bd6a3c7a129b469c609fc564bb","first_computed_at":"2026-05-18T01:12:01.032690Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:01.032690Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"CypyrcP9DoQKIl8wtYUxcIU/G818qaM/bW/bh9rHwC7AG+eAeoXJamvmQHbgliyeUx4xTpiaIWZUygIeqxq+AA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:01.033077Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.06822","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c439e8da44038087e685c38e1738fc06722cbf7b0187c57401d0341817440ca","sha256:ffe58627a751396735fcfc2b2d256d0311e8a622d82738a9839302239e949bb1"],"state_sha256":"adf78a0d1ea5c48164b65090e7995390e018d195602215ed01f68c8dd42d7b86"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8BMC0z6dEeMIkVf3RSHfpyyXHBSmKeSZRidagCMu2B7yIaOlfXJEA2CvNRDn21M+ALa60UJtrEGDVv4EEjLyBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T13:16:16.356258Z","bundle_sha256":"ccc1a7e824de657822c1bfa1d05c8f3f5cdb7440eef1df544d0b56bb81a4e3fd"}}