{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:6ISIRHFFOFITG2BLQOKJMR2GZ3","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":"a730b3a1fff9aaf1baa441655692d315442e4877123a9e1dfe5feeb38fb78637","cross_cats_sorted":["physics.chem-ph","physics.ins-det","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-01-05T17:57:21Z","title_canon_sha256":"e7c78dffe263f2f63c24fab600b854f3fdc066b3cbcf1e83cd927cf0ef4e5e87"},"schema_version":"1.0","source":{"id":"1701.01401","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1701.01401","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"arxiv_version","alias_value":"1701.01401v1","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1701.01401","created_at":"2026-05-18T00:31:41Z"},{"alias_kind":"pith_short_12","alias_value":"6ISIRHFFOFIT","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_16","alias_value":"6ISIRHFFOFITG2BL","created_at":"2026-05-18T12:31:03Z"},{"alias_kind":"pith_short_8","alias_value":"6ISIRHFF","created_at":"2026-05-18T12:31:03Z"}],"graph_snapshots":[{"event_id":"sha256:964deb87bdc3aace5d5ef68543ede8bca52727f31b0d1c6176d9482b9eb49dee","target":"graph","created_at":"2026-05-18T00:31:41Z","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 demonstrate nuclear magnetic resonance (NMR) spectroscopy of picoliter-volume solutions with a nanostructured diamond chip. Using optical interferometric lithography, diamond surfaces were nanostructured with dense, high-aspect-ratio nanogratings, enhancing the surface area by more than a factor of 15 over mm^2 regions of the chip. The nanograting sidewalls were doped with nitrogen-vacancy (NV) centers so that more than 10 million NV centers in a (25 micrometer)^2 laser spot are located close enough to the diamond surface (5 nm) to detect the NMR spectrum of 1 pL of fluid lying within adjac","authors_text":"A. Jarmola, A. Laraoui, A. Neumann, D. Budker, F. M. Benito, I. Fescenko, J. Smits, L. Bougas, N. Mosavian, P. Kehayias, S. R. J. Brueck, V. M. Acosta","cross_cats":["physics.chem-ph","physics.ins-det","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-01-05T17:57:21Z","title":"Solution nuclear magnetic resonance spectroscopy on a nanostructured diamond chip"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1701.01401","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:c38c3c99348a118d40fce1b1fee8396bdffceb1a672b35a35ee50cb7a71003f8","target":"record","created_at":"2026-05-18T00:31:41Z","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":"a730b3a1fff9aaf1baa441655692d315442e4877123a9e1dfe5feeb38fb78637","cross_cats_sorted":["physics.chem-ph","physics.ins-det","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2017-01-05T17:57:21Z","title_canon_sha256":"e7c78dffe263f2f63c24fab600b854f3fdc066b3cbcf1e83cd927cf0ef4e5e87"},"schema_version":"1.0","source":{"id":"1701.01401","kind":"arxiv","version":1}},"canonical_sha256":"f224889ca5715133682b8394964746cee61c5e91e7230107ad3aa99d1b851262","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f224889ca5715133682b8394964746cee61c5e91e7230107ad3aa99d1b851262","first_computed_at":"2026-05-18T00:31:41.777545Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:31:41.777545Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"F7nc0UxPUDcIqJsvbnGEoW6ZioP3B+afW9JTJHn3ZFLB6X2cMg/PFtJWOOuT67FRKHUgUpwWo3MiiacwT8OWAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:31:41.777923Z","signed_message":"canonical_sha256_bytes"},"source_id":"1701.01401","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c38c3c99348a118d40fce1b1fee8396bdffceb1a672b35a35ee50cb7a71003f8","sha256:964deb87bdc3aace5d5ef68543ede8bca52727f31b0d1c6176d9482b9eb49dee"],"state_sha256":"094d03c2e058884508ed024d6bc9a572d64e1ce9e7de82f6599625ca71032dc9"}