{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:45HIPXHUCRNFW5MS3TTW4M3KWR","short_pith_number":"pith:45HIPXHU","canonical_record":{"source":{"id":"1501.05199","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-21T15:44:08Z","cross_cats_sorted":[],"title_canon_sha256":"5b504e31af52bd6d0662215ca0dbe52c307503cf8e5eb6276a2605bd39a90a8d","abstract_canon_sha256":"c52805001e2ad78dd7ebb296a28b7e5be888743f5c1582e37d09b6200a2fe4f0"},"schema_version":"1.0"},"canonical_sha256":"e74e87dcf4145a5b7592dce76e336ab4603be3f0c9aefa41907abdd510631b14","source":{"kind":"arxiv","id":"1501.05199","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.05199","created_at":"2026-05-18T02:28:55Z"},{"alias_kind":"arxiv_version","alias_value":"1501.05199v1","created_at":"2026-05-18T02:28:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.05199","created_at":"2026-05-18T02:28:55Z"},{"alias_kind":"pith_short_12","alias_value":"45HIPXHUCRNF","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"45HIPXHUCRNFW5MS","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"45HIPXHU","created_at":"2026-05-18T12:29:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:45HIPXHUCRNFW5MS3TTW4M3KWR","target":"record","payload":{"canonical_record":{"source":{"id":"1501.05199","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-21T15:44:08Z","cross_cats_sorted":[],"title_canon_sha256":"5b504e31af52bd6d0662215ca0dbe52c307503cf8e5eb6276a2605bd39a90a8d","abstract_canon_sha256":"c52805001e2ad78dd7ebb296a28b7e5be888743f5c1582e37d09b6200a2fe4f0"},"schema_version":"1.0"},"canonical_sha256":"e74e87dcf4145a5b7592dce76e336ab4603be3f0c9aefa41907abdd510631b14","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:28:55.754603Z","signature_b64":"quUX1Or/PA1jux/NFfaEzDOCbSsXez4RCe4TVBikLU4jD39weKTMCwusk8rMV88CaykGTpE1Cox+3OAMF7SuBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e74e87dcf4145a5b7592dce76e336ab4603be3f0c9aefa41907abdd510631b14","last_reissued_at":"2026-05-18T02:28:55.754135Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:28:55.754135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1501.05199","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":"2026-05-18T02:28:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ETa2GQEtTrJw5UTOiJfSFOVfMd7sjp6gRsPxxGHAIec3x2vKL1GrHkj+iVTGLu3wJLUdSAnAgJ2oEjbuEqGwAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:33:04.640480Z"},"content_sha256":"4931e8115945ba869efd936f50c6542b34ab639835e5eb3525b2ad712a7652c4","schema_version":"1.0","event_id":"sha256:4931e8115945ba869efd936f50c6542b34ab639835e5eb3525b2ad712a7652c4"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:45HIPXHUCRNFW5MS3TTW4M3KWR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Etch-stop method for reliably fabricating sharp yet mechanically stable scanning tunneling microscope tips","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"G. Basnet, J.K. Schoelz, M.L. Ackerman, P.M. Thibado, P. Xu, S.D. Barber","submitted_at":"2015-01-21T15:44:08Z","abstract_excerpt":"An extension of the direct-current, double-lamella drop-off technique for electrochemically etching tungsten scanning-tunneling-microscope tips is presented. The key fabrication step introduced here is the use of an etch stop as a simple but accurate way to optimize the contact area between the etchant and the wire. By restricting the etching process, the final cone angle of the tips can be made sharp and mechanically stable without a lot of finesse from the STM tip maker."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.05199","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":"2026-05-18T02:28:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6uyRY7UjXmbOmdC5wgU6bmDZpskQrhBKqYLSfmrLpufA9tFRfb+WWN3kdGREaRUIb4VbAM3HnXguBQ0dn5lKBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T16:33:04.641215Z"},"content_sha256":"13c30b20c34b4e25cd5364b6e8f9a44c304afbe2d2028c2e1c47e6163faed273","schema_version":"1.0","event_id":"sha256:13c30b20c34b4e25cd5364b6e8f9a44c304afbe2d2028c2e1c47e6163faed273"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/45HIPXHUCRNFW5MS3TTW4M3KWR/bundle.json","state_url":"https://pith.science/pith/45HIPXHUCRNFW5MS3TTW4M3KWR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/45HIPXHUCRNFW5MS3TTW4M3KWR/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":"2026-05-30T16:33:04Z","links":{"resolver":"https://pith.science/pith/45HIPXHUCRNFW5MS3TTW4M3KWR","bundle":"https://pith.science/pith/45HIPXHUCRNFW5MS3TTW4M3KWR/bundle.json","state":"https://pith.science/pith/45HIPXHUCRNFW5MS3TTW4M3KWR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/45HIPXHUCRNFW5MS3TTW4M3KWR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:45HIPXHUCRNFW5MS3TTW4M3KWR","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":"c52805001e2ad78dd7ebb296a28b7e5be888743f5c1582e37d09b6200a2fe4f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-21T15:44:08Z","title_canon_sha256":"5b504e31af52bd6d0662215ca0dbe52c307503cf8e5eb6276a2605bd39a90a8d"},"schema_version":"1.0","source":{"id":"1501.05199","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1501.05199","created_at":"2026-05-18T02:28:55Z"},{"alias_kind":"arxiv_version","alias_value":"1501.05199v1","created_at":"2026-05-18T02:28:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1501.05199","created_at":"2026-05-18T02:28:55Z"},{"alias_kind":"pith_short_12","alias_value":"45HIPXHUCRNF","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_16","alias_value":"45HIPXHUCRNFW5MS","created_at":"2026-05-18T12:29:02Z"},{"alias_kind":"pith_short_8","alias_value":"45HIPXHU","created_at":"2026-05-18T12:29:02Z"}],"graph_snapshots":[{"event_id":"sha256:13c30b20c34b4e25cd5364b6e8f9a44c304afbe2d2028c2e1c47e6163faed273","target":"graph","created_at":"2026-05-18T02:28:55Z","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":"An extension of the direct-current, double-lamella drop-off technique for electrochemically etching tungsten scanning-tunneling-microscope tips is presented. The key fabrication step introduced here is the use of an etch stop as a simple but accurate way to optimize the contact area between the etchant and the wire. By restricting the etching process, the final cone angle of the tips can be made sharp and mechanically stable without a lot of finesse from the STM tip maker.","authors_text":"G. Basnet, J.K. Schoelz, M.L. Ackerman, P.M. Thibado, P. Xu, S.D. Barber","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-21T15:44:08Z","title":"Etch-stop method for reliably fabricating sharp yet mechanically stable scanning tunneling microscope tips"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1501.05199","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":"sha256:4931e8115945ba869efd936f50c6542b34ab639835e5eb3525b2ad712a7652c4","target":"record","created_at":"2026-05-18T02:28:55Z","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":"c52805001e2ad78dd7ebb296a28b7e5be888743f5c1582e37d09b6200a2fe4f0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-01-21T15:44:08Z","title_canon_sha256":"5b504e31af52bd6d0662215ca0dbe52c307503cf8e5eb6276a2605bd39a90a8d"},"schema_version":"1.0","source":{"id":"1501.05199","kind":"arxiv","version":1}},"canonical_sha256":"e74e87dcf4145a5b7592dce76e336ab4603be3f0c9aefa41907abdd510631b14","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e74e87dcf4145a5b7592dce76e336ab4603be3f0c9aefa41907abdd510631b14","first_computed_at":"2026-05-18T02:28:55.754135Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:28:55.754135Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"quUX1Or/PA1jux/NFfaEzDOCbSsXez4RCe4TVBikLU4jD39weKTMCwusk8rMV88CaykGTpE1Cox+3OAMF7SuBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:28:55.754603Z","signed_message":"canonical_sha256_bytes"},"source_id":"1501.05199","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4931e8115945ba869efd936f50c6542b34ab639835e5eb3525b2ad712a7652c4","sha256:13c30b20c34b4e25cd5364b6e8f9a44c304afbe2d2028c2e1c47e6163faed273"],"state_sha256":"6ad658ba5ef23a35213899d07ed054efc58361564cd71d7c59a26b40c16599b0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K4AzMq114G1TOFn5a1u+mKq39nnj8opSeQmXWqCcYSxAYuhX2Vnfk/0WG1zT91GepuRV71kqPKfl+pASpn6pDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T16:33:04.645153Z","bundle_sha256":"a905882529954a96bf5b643115c8f0047fb372814fe3824b24c88f906b755ce8"}}