{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:OVA2FAUU7K4VSTPC2KG573KNFH","short_pith_number":"pith:OVA2FAUU","canonical_record":{"source":{"id":"1901.09059","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-25T19:43:40Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"8d4d30660d4fa34d46a123d2e1740c76ab17a144a922c53b1f1967d8f338100e","abstract_canon_sha256":"3c9817d9da0d582539733e24d13ad41138dcbef0762f0334b218cf10621614ab"},"schema_version":"1.0"},"canonical_sha256":"7541a28294fab9594de2d28ddfed4d29e6da190b8234d04323efa216454e2fad","source":{"kind":"arxiv","id":"1901.09059","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.09059","created_at":"2026-05-17T23:55:06Z"},{"alias_kind":"arxiv_version","alias_value":"1901.09059v1","created_at":"2026-05-17T23:55:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.09059","created_at":"2026-05-17T23:55:06Z"},{"alias_kind":"pith_short_12","alias_value":"OVA2FAUU7K4V","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"OVA2FAUU7K4VSTPC","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"OVA2FAUU","created_at":"2026-05-18T12:33:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:OVA2FAUU7K4VSTPC2KG573KNFH","target":"record","payload":{"canonical_record":{"source":{"id":"1901.09059","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-25T19:43:40Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"8d4d30660d4fa34d46a123d2e1740c76ab17a144a922c53b1f1967d8f338100e","abstract_canon_sha256":"3c9817d9da0d582539733e24d13ad41138dcbef0762f0334b218cf10621614ab"},"schema_version":"1.0"},"canonical_sha256":"7541a28294fab9594de2d28ddfed4d29e6da190b8234d04323efa216454e2fad","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:55:06.964340Z","signature_b64":"uf42w7cOLt46ih71knbTGNAO2WM4jFECBZqq1qK+RXEGMRHGBoWSJi+F7JoG7VS0ioqlZIicwvnzyRYXSYIfDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7541a28294fab9594de2d28ddfed4d29e6da190b8234d04323efa216454e2fad","last_reissued_at":"2026-05-17T23:55:06.963780Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:55:06.963780Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1901.09059","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":"2026-05-17T23:55:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4xAXIobTklU1cx9oWpTdaLB9YbDA/pR4Aa4X/2z9eTBPzcEywSIax1dtw1v6zazBzq4hcsGMkVVLWlPgn2duDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T06:47:41.298488Z"},"content_sha256":"863a3f5562de2215c4d84e37f0987f4fed91a8063d8051b02194912c5609f3f2","schema_version":"1.0","event_id":"sha256:863a3f5562de2215c4d84e37f0987f4fed91a8063d8051b02194912c5609f3f2"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:OVA2FAUU7K4VSTPC2KG573KNFH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"$\\r{A}$-Indentation for non-destructive elastic moduli measurements of supported ultra-hard ultra-thin films and nanostructures","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"Elisa Riedo, Filippo Cellini, Yang Gao","submitted_at":"2019-01-25T19:43:40Z","abstract_excerpt":"During conventional nanoindentation measurements, the indentation depths are usually larger than 1-10 nm, which hinders the ability to study ultra-thin films ($<$ 10 nm) and supported atomically thin two-dimensional (2D) materials. Here, we discuss the development of modulated \\r{A}-indentation to achieve sub-\\r{A} indentation depths during force-indentation measurements while also imaging materials with nanoscale resolution. Modulated nanoindentation (MoNI) was originally invented to measure the radial elasticity of multi-walled nanotubes. Now, by using extremely small amplitude oscillations "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.09059","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":"2026-05-17T23:55:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TTPqfO2CCUF/5rWBXBFWyu1TTi36Z/1N9NfSO6fh+VPB1k1ak3HC53RXC4qicnVvV5mB3BJjJudBIz9i0dr7Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-24T06:47:41.298836Z"},"content_sha256":"db5fef8d7dcd1f07fd4980fb30135dd3d5bc70c51ee6ae4a7f6320200eda9fdf","schema_version":"1.0","event_id":"sha256:db5fef8d7dcd1f07fd4980fb30135dd3d5bc70c51ee6ae4a7f6320200eda9fdf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OVA2FAUU7K4VSTPC2KG573KNFH/bundle.json","state_url":"https://pith.science/pith/OVA2FAUU7K4VSTPC2KG573KNFH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OVA2FAUU7K4VSTPC2KG573KNFH/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":"2026-06-24T06:47:41Z","links":{"resolver":"https://pith.science/pith/OVA2FAUU7K4VSTPC2KG573KNFH","bundle":"https://pith.science/pith/OVA2FAUU7K4VSTPC2KG573KNFH/bundle.json","state":"https://pith.science/pith/OVA2FAUU7K4VSTPC2KG573KNFH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OVA2FAUU7K4VSTPC2KG573KNFH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:OVA2FAUU7K4VSTPC2KG573KNFH","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":"3c9817d9da0d582539733e24d13ad41138dcbef0762f0334b218cf10621614ab","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-25T19:43:40Z","title_canon_sha256":"8d4d30660d4fa34d46a123d2e1740c76ab17a144a922c53b1f1967d8f338100e"},"schema_version":"1.0","source":{"id":"1901.09059","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1901.09059","created_at":"2026-05-17T23:55:06Z"},{"alias_kind":"arxiv_version","alias_value":"1901.09059v1","created_at":"2026-05-17T23:55:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1901.09059","created_at":"2026-05-17T23:55:06Z"},{"alias_kind":"pith_short_12","alias_value":"OVA2FAUU7K4V","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_16","alias_value":"OVA2FAUU7K4VSTPC","created_at":"2026-05-18T12:33:24Z"},{"alias_kind":"pith_short_8","alias_value":"OVA2FAUU","created_at":"2026-05-18T12:33:24Z"}],"graph_snapshots":[{"event_id":"sha256:db5fef8d7dcd1f07fd4980fb30135dd3d5bc70c51ee6ae4a7f6320200eda9fdf","target":"graph","created_at":"2026-05-17T23:55:06Z","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":"During conventional nanoindentation measurements, the indentation depths are usually larger than 1-10 nm, which hinders the ability to study ultra-thin films ($<$ 10 nm) and supported atomically thin two-dimensional (2D) materials. Here, we discuss the development of modulated \\r{A}-indentation to achieve sub-\\r{A} indentation depths during force-indentation measurements while also imaging materials with nanoscale resolution. Modulated nanoindentation (MoNI) was originally invented to measure the radial elasticity of multi-walled nanotubes. Now, by using extremely small amplitude oscillations ","authors_text":"Elisa Riedo, Filippo Cellini, Yang Gao","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-25T19:43:40Z","title":"$\\r{A}$-Indentation for non-destructive elastic moduli measurements of supported ultra-hard ultra-thin films and nanostructures"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1901.09059","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":"sha256:863a3f5562de2215c4d84e37f0987f4fed91a8063d8051b02194912c5609f3f2","target":"record","created_at":"2026-05-17T23:55:06Z","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":"3c9817d9da0d582539733e24d13ad41138dcbef0762f0334b218cf10621614ab","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.app-ph","submitted_at":"2019-01-25T19:43:40Z","title_canon_sha256":"8d4d30660d4fa34d46a123d2e1740c76ab17a144a922c53b1f1967d8f338100e"},"schema_version":"1.0","source":{"id":"1901.09059","kind":"arxiv","version":1}},"canonical_sha256":"7541a28294fab9594de2d28ddfed4d29e6da190b8234d04323efa216454e2fad","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7541a28294fab9594de2d28ddfed4d29e6da190b8234d04323efa216454e2fad","first_computed_at":"2026-05-17T23:55:06.963780Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:55:06.963780Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"uf42w7cOLt46ih71knbTGNAO2WM4jFECBZqq1qK+RXEGMRHGBoWSJi+F7JoG7VS0ioqlZIicwvnzyRYXSYIfDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:55:06.964340Z","signed_message":"canonical_sha256_bytes"},"source_id":"1901.09059","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:863a3f5562de2215c4d84e37f0987f4fed91a8063d8051b02194912c5609f3f2","sha256:db5fef8d7dcd1f07fd4980fb30135dd3d5bc70c51ee6ae4a7f6320200eda9fdf"],"state_sha256":"b8990dbb2b5c2f92f9c7bbb7d7538634d7c2a1bae9df8f9545d1184cff6d5e3e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XtPe3KHl0dHkyLj/5spcDMY8itt/BcHtQDQYKi48cePvyA9k/Dz587dKXwAVBUj9/+fuG46WMB321/ZaKM7/Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-24T06:47:41.300830Z","bundle_sha256":"817c4b384983636d8735fc1ad80551f65d05a44855901b20dd4a40acfa07917c"}}