{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:ZO6534JFQ67BOQZRF6B5HW34YB","short_pith_number":"pith:ZO6534JF","schema_version":"1.0","canonical_sha256":"cbbdddf12587be1743312f83d3db7cc0462fff8f032e16232ae20bb117229ce6","source":{"kind":"arxiv","id":"1603.02547","version":1},"attestation_state":"computed","paper":{"title":"Ligand-Surface Interactions and Surface Oxidation of Colloidal PbSe Quantum Dots Revealed by Thin-film Positron Annihilation Methods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Arjan J. Houtepen, Arun Bansil, Bernardo Barbiellini, C.S. Suchand Sandeep, Ekkes Br\\\"uck, Laurens D.A. Siebbeles, Sachin Kinge, Stephan W.H. Eijt, Wenqin Shi","submitted_at":"2016-03-08T15:24:57Z","abstract_excerpt":"Positron Two Dimensional Angular Correlation of Annihilation Radiation (2D-ACAR) measurements reveal modifications of the electronic structure and composition at the surfaces of PbSe quantum dots (QDs), deposited as thin films, produced by various ligands containing either oxygen or nitrogen atoms. In particular, the 2D-ACAR measurements on thin films of colloidal PbSe QDs capped with oleic acid ligands yield an increased intensity in the electron momentum density (EMD) at high momenta compared to PbSe quantum dots capped with oleylamine. Moreover, the EMD of PbSe QDs is strongly affected by t"},"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":"1603.02547","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-03-08T15:24:57Z","cross_cats_sorted":[],"title_canon_sha256":"927fad504f0bd00ce6f7c67a04457816343543ac3fc4eceaa3183fecf46c33af","abstract_canon_sha256":"06344a9fa4ac847dd13c09b4fc22299323a0509e2f78582bdad63bbf4e65eaaa"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:19:22.939485Z","signature_b64":"Es2PJk9UjD6obmssnsjasnfNzHkvsJC+6L11ZwQOj9/qVje8xbtx3OFqYs6Qsc4+RpnJusSvn6BwSvJfWP8fDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cbbdddf12587be1743312f83d3db7cc0462fff8f032e16232ae20bb117229ce6","last_reissued_at":"2026-05-18T01:19:22.938959Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:19:22.938959Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ligand-Surface Interactions and Surface Oxidation of Colloidal PbSe Quantum Dots Revealed by Thin-film Positron Annihilation Methods","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Arjan J. Houtepen, Arun Bansil, Bernardo Barbiellini, C.S. Suchand Sandeep, Ekkes Br\\\"uck, Laurens D.A. Siebbeles, Sachin Kinge, Stephan W.H. Eijt, Wenqin Shi","submitted_at":"2016-03-08T15:24:57Z","abstract_excerpt":"Positron Two Dimensional Angular Correlation of Annihilation Radiation (2D-ACAR) measurements reveal modifications of the electronic structure and composition at the surfaces of PbSe quantum dots (QDs), deposited as thin films, produced by various ligands containing either oxygen or nitrogen atoms. In particular, the 2D-ACAR measurements on thin films of colloidal PbSe QDs capped with oleic acid ligands yield an increased intensity in the electron momentum density (EMD) at high momenta compared to PbSe quantum dots capped with oleylamine. Moreover, the EMD of PbSe QDs is strongly affected by t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1603.02547","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1603.02547","created_at":"2026-05-18T01:19:22.939033+00:00"},{"alias_kind":"arxiv_version","alias_value":"1603.02547v1","created_at":"2026-05-18T01:19:22.939033+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1603.02547","created_at":"2026-05-18T01:19:22.939033+00:00"},{"alias_kind":"pith_short_12","alias_value":"ZO6534JFQ67B","created_at":"2026-05-18T12:30:55.937587+00:00"},{"alias_kind":"pith_short_16","alias_value":"ZO6534JFQ67BOQZR","created_at":"2026-05-18T12:30:55.937587+00:00"},{"alias_kind":"pith_short_8","alias_value":"ZO6534JF","created_at":"2026-05-18T12:30:55.937587+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/ZO6534JFQ67BOQZRF6B5HW34YB","json":"https://pith.science/pith/ZO6534JFQ67BOQZRF6B5HW34YB.json","graph_json":"https://pith.science/api/pith-number/ZO6534JFQ67BOQZRF6B5HW34YB/graph.json","events_json":"https://pith.science/api/pith-number/ZO6534JFQ67BOQZRF6B5HW34YB/events.json","paper":"https://pith.science/paper/ZO6534JF"},"agent_actions":{"view_html":"https://pith.science/pith/ZO6534JFQ67BOQZRF6B5HW34YB","download_json":"https://pith.science/pith/ZO6534JFQ67BOQZRF6B5HW34YB.json","view_paper":"https://pith.science/paper/ZO6534JF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1603.02547&json=true","fetch_graph":"https://pith.science/api/pith-number/ZO6534JFQ67BOQZRF6B5HW34YB/graph.json","fetch_events":"https://pith.science/api/pith-number/ZO6534JFQ67BOQZRF6B5HW34YB/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ZO6534JFQ67BOQZRF6B5HW34YB/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ZO6534JFQ67BOQZRF6B5HW34YB/action/storage_attestation","attest_author":"https://pith.science/pith/ZO6534JFQ67BOQZRF6B5HW34YB/action/author_attestation","sign_citation":"https://pith.science/pith/ZO6534JFQ67BOQZRF6B5HW34YB/action/citation_signature","submit_replication":"https://pith.science/pith/ZO6534JFQ67BOQZRF6B5HW34YB/action/replication_record"}},"created_at":"2026-05-18T01:19:22.939033+00:00","updated_at":"2026-05-18T01:19:22.939033+00:00"}