{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:6F5RIO55OSXRRHVV5JOGRAJZQP","short_pith_number":"pith:6F5RIO55","schema_version":"1.0","canonical_sha256":"f17b143bbd74af189eb5ea5c68813983df4b8752356f4b6f62cfc3b1b53e12f7","source":{"kind":"arxiv","id":"1811.05108","version":2},"attestation_state":"computed","paper":{"title":"Theory of light-activated catalytic Janus particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.flu-dyn"],"primary_cat":"cond-mat.soft","authors_text":"W. E. Uspal","submitted_at":"2018-11-13T05:08:30Z","abstract_excerpt":"We study the dynamics of active Janus particles that self-propel in solution by light-activated catalytic decomposition of chemical \"fuel.\" We develop an analytical model of a photo-active self-phoretic particle that accounts for \"self-shadowing\" of the light by the opaque catalytic face of the particle. We find that self-shadowing can drive \"phototaxis\" (rotation of the catalytic cap towards the light source) or \"anti-phototaxis,\" depending on the properties of the particle. Incorporating the effect of thermal noise, we show that the distribution of particle orientations is captured by a Bolt"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1811.05108","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.soft","submitted_at":"2018-11-13T05:08:30Z","cross_cats_sorted":["physics.flu-dyn"],"title_canon_sha256":"d8804c684ea5c32e2d1ff2f4c805e633ac01f435336142f6aa23366eaeb548d8","abstract_canon_sha256":"444ab21fe55486c39376357faf6140544f1a26fe756ae0d8eb3195f744d43c8a"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:45:25.951956Z","signature_b64":"+ZInlEYq11Kq+6xDB1quV6fRLHMY3usI1+jYH1bbzQDq5wrhptpePmn4YANzO30XcnzG5NkQhwJo6rcwKNHCBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f17b143bbd74af189eb5ea5c68813983df4b8752356f4b6f62cfc3b1b53e12f7","last_reissued_at":"2026-05-17T23:45:25.951309Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:45:25.951309Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Theory of light-activated catalytic Janus particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.flu-dyn"],"primary_cat":"cond-mat.soft","authors_text":"W. E. Uspal","submitted_at":"2018-11-13T05:08:30Z","abstract_excerpt":"We study the dynamics of active Janus particles that self-propel in solution by light-activated catalytic decomposition of chemical \"fuel.\" We develop an analytical model of a photo-active self-phoretic particle that accounts for \"self-shadowing\" of the light by the opaque catalytic face of the particle. We find that self-shadowing can drive \"phototaxis\" (rotation of the catalytic cap towards the light source) or \"anti-phototaxis,\" depending on the properties of the particle. Incorporating the effect of thermal noise, we show that the distribution of particle orientations is captured by a Bolt"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1811.05108","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1811.05108","created_at":"2026-05-17T23:45:25.951432+00:00"},{"alias_kind":"arxiv_version","alias_value":"1811.05108v2","created_at":"2026-05-17T23:45:25.951432+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1811.05108","created_at":"2026-05-17T23:45:25.951432+00:00"},{"alias_kind":"pith_short_12","alias_value":"6F5RIO55OSXR","created_at":"2026-05-18T12:32:08.215937+00:00"},{"alias_kind":"pith_short_16","alias_value":"6F5RIO55OSXRRHVV","created_at":"2026-05-18T12:32:08.215937+00:00"},{"alias_kind":"pith_short_8","alias_value":"6F5RIO55","created_at":"2026-05-18T12:32:08.215937+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP","json":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP.json","graph_json":"https://pith.science/api/pith-number/6F5RIO55OSXRRHVV5JOGRAJZQP/graph.json","events_json":"https://pith.science/api/pith-number/6F5RIO55OSXRRHVV5JOGRAJZQP/events.json","paper":"https://pith.science/paper/6F5RIO55"},"agent_actions":{"view_html":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP","download_json":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP.json","view_paper":"https://pith.science/paper/6F5RIO55","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1811.05108&json=true","fetch_graph":"https://pith.science/api/pith-number/6F5RIO55OSXRRHVV5JOGRAJZQP/graph.json","fetch_events":"https://pith.science/api/pith-number/6F5RIO55OSXRRHVV5JOGRAJZQP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP/action/storage_attestation","attest_author":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP/action/author_attestation","sign_citation":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP/action/citation_signature","submit_replication":"https://pith.science/pith/6F5RIO55OSXRRHVV5JOGRAJZQP/action/replication_record"}},"created_at":"2026-05-17T23:45:25.951432+00:00","updated_at":"2026-05-17T23:45:25.951432+00:00"}