{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:SJWQHFUEZB3PXHU4X64NQEWRNS","short_pith_number":"pith:SJWQHFUE","canonical_record":{"source":{"id":"0907.2111","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-13T08:19:36Z","cross_cats_sorted":[],"title_canon_sha256":"fb4c7fa3a842bf633dd699c69e30724d62b3018a172382fd6ddd4b05dbc3dcf1","abstract_canon_sha256":"8b0aa3e625eaa2742b4f916d86fff86f5c71da6565b43bf9c2f518b16782c1c1"},"schema_version":"1.0"},"canonical_sha256":"926d039684c876fb9e9cbfb8d812d16c9f4acba645abd72a88f5e1a5d4efeec1","source":{"kind":"arxiv","id":"0907.2111","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.2111","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"0907.2111v1","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.2111","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"SJWQHFUEZB3P","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"SJWQHFUEZB3PXHU4","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"SJWQHFUE","created_at":"2026-05-18T12:26:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:SJWQHFUEZB3PXHU4X64NQEWRNS","target":"record","payload":{"canonical_record":{"source":{"id":"0907.2111","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-13T08:19:36Z","cross_cats_sorted":[],"title_canon_sha256":"fb4c7fa3a842bf633dd699c69e30724d62b3018a172382fd6ddd4b05dbc3dcf1","abstract_canon_sha256":"8b0aa3e625eaa2742b4f916d86fff86f5c71da6565b43bf9c2f518b16782c1c1"},"schema_version":"1.0"},"canonical_sha256":"926d039684c876fb9e9cbfb8d812d16c9f4acba645abd72a88f5e1a5d4efeec1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:17:54.316370Z","signature_b64":"A/21gp9YbkGn9m2PijB0HNQIq1EVTsFlMyd+vPimz+X+neXdTL5TljlwBIGYDFCr5Z5AKyaDMGIgyIZZi5G/DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"926d039684c876fb9e9cbfb8d812d16c9f4acba645abd72a88f5e1a5d4efeec1","last_reissued_at":"2026-05-18T03:17:54.315728Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:17:54.315728Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0907.2111","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":"2026-05-18T03:17:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v/GUrBZtCHPKqTSLupFX02ZVSTZ+47TMHfbKppV2xtLYaltozZa4jgQBChBHVtq3eJ9g8FMkaVlEu/zLbTN3BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:05:13.668208Z"},"content_sha256":"c00817beba8b5ad525e14e9889108bb3dc32cb8adaf4769aa50016388e1c3c32","schema_version":"1.0","event_id":"sha256:c00817beba8b5ad525e14e9889108bb3dc32cb8adaf4769aa50016388e1c3c32"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:SJWQHFUEZB3PXHU4X64NQEWRNS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rotational dynamics of optically trapped polymeric nanofibers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Andrea Camposeo, Antonio Alvaro Ranha Neves, Dario Pisignano, Ferdinando Borghese, Maria Antonia Iati, Onofrio M. Marago, Paolo Denti, Roberto Cingolani, Rosalba Saija, Stefano Pagliara","submitted_at":"2009-07-13T08:19:36Z","abstract_excerpt":"The optical trapping of polymeric nanofibers and the characterization of the rotational dynamics are reported. A strategy to apply a torque to a polymer nanofiber, by tilting the trapped fibers using a symmetrical linear polarized Gaussian beam is demonstrated. Rotation frequencies up to 10 Hz are measured, depending on the trapping power, the fiber length and the tilt angle. A comparison of the experimental rotation frequencies in the different trapping configurations with calculations based on optical trapping and rotation of linear nanostructures through a T-Matrix formalism, accurately rep"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.2111","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":"2026-05-18T03:17:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nxJTJ9vh1vNCazNXDU1YUVP2PWayoCmvV5OKXyc8eqV87h9DKgQ5Jf3YdKLobBYEuC4fetX1zhmtwcYrGNnpAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:05:13.668566Z"},"content_sha256":"2b7d94215edbbf334a2eaf8618f0fefd875c7a2307b87f794bacd6ad081d6e38","schema_version":"1.0","event_id":"sha256:2b7d94215edbbf334a2eaf8618f0fefd875c7a2307b87f794bacd6ad081d6e38"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SJWQHFUEZB3PXHU4X64NQEWRNS/bundle.json","state_url":"https://pith.science/pith/SJWQHFUEZB3PXHU4X64NQEWRNS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SJWQHFUEZB3PXHU4X64NQEWRNS/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":"2026-06-02T18:05:13Z","links":{"resolver":"https://pith.science/pith/SJWQHFUEZB3PXHU4X64NQEWRNS","bundle":"https://pith.science/pith/SJWQHFUEZB3PXHU4X64NQEWRNS/bundle.json","state":"https://pith.science/pith/SJWQHFUEZB3PXHU4X64NQEWRNS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SJWQHFUEZB3PXHU4X64NQEWRNS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:SJWQHFUEZB3PXHU4X64NQEWRNS","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":"8b0aa3e625eaa2742b4f916d86fff86f5c71da6565b43bf9c2f518b16782c1c1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-13T08:19:36Z","title_canon_sha256":"fb4c7fa3a842bf633dd699c69e30724d62b3018a172382fd6ddd4b05dbc3dcf1"},"schema_version":"1.0","source":{"id":"0907.2111","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0907.2111","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"arxiv_version","alias_value":"0907.2111v1","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0907.2111","created_at":"2026-05-18T03:17:54Z"},{"alias_kind":"pith_short_12","alias_value":"SJWQHFUEZB3P","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_16","alias_value":"SJWQHFUEZB3PXHU4","created_at":"2026-05-18T12:26:01Z"},{"alias_kind":"pith_short_8","alias_value":"SJWQHFUE","created_at":"2026-05-18T12:26:01Z"}],"graph_snapshots":[{"event_id":"sha256:2b7d94215edbbf334a2eaf8618f0fefd875c7a2307b87f794bacd6ad081d6e38","target":"graph","created_at":"2026-05-18T03:17:54Z","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 optical trapping of polymeric nanofibers and the characterization of the rotational dynamics are reported. A strategy to apply a torque to a polymer nanofiber, by tilting the trapped fibers using a symmetrical linear polarized Gaussian beam is demonstrated. Rotation frequencies up to 10 Hz are measured, depending on the trapping power, the fiber length and the tilt angle. A comparison of the experimental rotation frequencies in the different trapping configurations with calculations based on optical trapping and rotation of linear nanostructures through a T-Matrix formalism, accurately rep","authors_text":"Andrea Camposeo, Antonio Alvaro Ranha Neves, Dario Pisignano, Ferdinando Borghese, Maria Antonia Iati, Onofrio M. Marago, Paolo Denti, Roberto Cingolani, Rosalba Saija, Stefano Pagliara","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-13T08:19:36Z","title":"Rotational dynamics of optically trapped polymeric nanofibers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0907.2111","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:c00817beba8b5ad525e14e9889108bb3dc32cb8adaf4769aa50016388e1c3c32","target":"record","created_at":"2026-05-18T03:17:54Z","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":"8b0aa3e625eaa2742b4f916d86fff86f5c71da6565b43bf9c2f518b16782c1c1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2009-07-13T08:19:36Z","title_canon_sha256":"fb4c7fa3a842bf633dd699c69e30724d62b3018a172382fd6ddd4b05dbc3dcf1"},"schema_version":"1.0","source":{"id":"0907.2111","kind":"arxiv","version":1}},"canonical_sha256":"926d039684c876fb9e9cbfb8d812d16c9f4acba645abd72a88f5e1a5d4efeec1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"926d039684c876fb9e9cbfb8d812d16c9f4acba645abd72a88f5e1a5d4efeec1","first_computed_at":"2026-05-18T03:17:54.315728Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:17:54.315728Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"A/21gp9YbkGn9m2PijB0HNQIq1EVTsFlMyd+vPimz+X+neXdTL5TljlwBIGYDFCr5Z5AKyaDMGIgyIZZi5G/DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:17:54.316370Z","signed_message":"canonical_sha256_bytes"},"source_id":"0907.2111","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c00817beba8b5ad525e14e9889108bb3dc32cb8adaf4769aa50016388e1c3c32","sha256:2b7d94215edbbf334a2eaf8618f0fefd875c7a2307b87f794bacd6ad081d6e38"],"state_sha256":"43fc08c483198be2992558775b43c5b248c9218fc249a2f734412b8d97e4cf01"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lnOzfmQudRUJVjBUcPe5H1TBoW10FMzONmW8shqmi4Xk4UTZv+xFGYJrEcvLHcPHM4bIeKNl5N/AwuaExG1FAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T18:05:13.670543Z","bundle_sha256":"001a2dd9b04080758e4a85b70c5deca52b6246f275a168e9e79d174c177723c2"}}