{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:GJRCGTO2WWFU6S5RKLSNTTOIEF","short_pith_number":"pith:GJRCGTO2","schema_version":"1.0","canonical_sha256":"3262234ddab58b4f4bb152e4d9cdc8214c0fdc88e5fa902d4a1e8a0238e4b105","source":{"kind":"arxiv","id":"1710.00740","version":1},"attestation_state":"computed","paper":{"title":"Ultrafast Molecular Transport on Carbon Surfaces: The Diffusion of Ammonia on Graphite","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Anton Tamt\\\"ogl, Irene Calvo-Almaz\\'an, Marco Sacchi, Marek M. Koza, Mohamed Zbiri, Peter Fouquet, Wolfgang E. Ernst","submitted_at":"2017-10-02T15:58:36Z","abstract_excerpt":"We present a combined experimental and theoretical study of the self-diffusion of ammonia on exfoliated graphite. Using neutron time-of-flight spectroscopy we are able to resolve the ultrafast diffusion process of adsorbed ammonia, NH$_3$, on graphite. Together with van der Waals corrected density functional theory calculations we show that the diffusion of NH$_3$ follows a hopping motion on a weakly corrugated potential energy surface with an activation energy of about 4 meV which is particularly low for this type of diffusive motion. The hopping motion includes further a significant number o"},"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":"1710.00740","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-10-02T15:58:36Z","cross_cats_sorted":[],"title_canon_sha256":"00f17fb7168d441342981c144181785c0b998306bbf4595740f1d90fe8a97eea","abstract_canon_sha256":"1b891b5ec2034448f3835532aa8884c17c7e3374214a759befc102a2d7a41adf"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:33:06.172052Z","signature_b64":"k00YPjG7HloOilPbZMezB885mpg0HAUd/UUrER11zlxvxDeuzn6ii2aOSzR6mOW59l8+e5xGH+rn+M2XySsIAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3262234ddab58b4f4bb152e4d9cdc8214c0fdc88e5fa902d4a1e8a0238e4b105","last_reissued_at":"2026-05-18T00:33:06.171111Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:33:06.171111Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ultrafast Molecular Transport on Carbon Surfaces: The Diffusion of Ammonia on Graphite","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Anton Tamt\\\"ogl, Irene Calvo-Almaz\\'an, Marco Sacchi, Marek M. Koza, Mohamed Zbiri, Peter Fouquet, Wolfgang E. Ernst","submitted_at":"2017-10-02T15:58:36Z","abstract_excerpt":"We present a combined experimental and theoretical study of the self-diffusion of ammonia on exfoliated graphite. Using neutron time-of-flight spectroscopy we are able to resolve the ultrafast diffusion process of adsorbed ammonia, NH$_3$, on graphite. Together with van der Waals corrected density functional theory calculations we show that the diffusion of NH$_3$ follows a hopping motion on a weakly corrugated potential energy surface with an activation energy of about 4 meV which is particularly low for this type of diffusive motion. The hopping motion includes further a significant number o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.00740","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":"1710.00740","created_at":"2026-05-18T00:33:06.171215+00:00"},{"alias_kind":"arxiv_version","alias_value":"1710.00740v1","created_at":"2026-05-18T00:33:06.171215+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.00740","created_at":"2026-05-18T00:33:06.171215+00:00"},{"alias_kind":"pith_short_12","alias_value":"GJRCGTO2WWFU","created_at":"2026-05-18T12:31:18.294218+00:00"},{"alias_kind":"pith_short_16","alias_value":"GJRCGTO2WWFU6S5R","created_at":"2026-05-18T12:31:18.294218+00:00"},{"alias_kind":"pith_short_8","alias_value":"GJRCGTO2","created_at":"2026-05-18T12:31:18.294218+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/GJRCGTO2WWFU6S5RKLSNTTOIEF","json":"https://pith.science/pith/GJRCGTO2WWFU6S5RKLSNTTOIEF.json","graph_json":"https://pith.science/api/pith-number/GJRCGTO2WWFU6S5RKLSNTTOIEF/graph.json","events_json":"https://pith.science/api/pith-number/GJRCGTO2WWFU6S5RKLSNTTOIEF/events.json","paper":"https://pith.science/paper/GJRCGTO2"},"agent_actions":{"view_html":"https://pith.science/pith/GJRCGTO2WWFU6S5RKLSNTTOIEF","download_json":"https://pith.science/pith/GJRCGTO2WWFU6S5RKLSNTTOIEF.json","view_paper":"https://pith.science/paper/GJRCGTO2","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1710.00740&json=true","fetch_graph":"https://pith.science/api/pith-number/GJRCGTO2WWFU6S5RKLSNTTOIEF/graph.json","fetch_events":"https://pith.science/api/pith-number/GJRCGTO2WWFU6S5RKLSNTTOIEF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/GJRCGTO2WWFU6S5RKLSNTTOIEF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/GJRCGTO2WWFU6S5RKLSNTTOIEF/action/storage_attestation","attest_author":"https://pith.science/pith/GJRCGTO2WWFU6S5RKLSNTTOIEF/action/author_attestation","sign_citation":"https://pith.science/pith/GJRCGTO2WWFU6S5RKLSNTTOIEF/action/citation_signature","submit_replication":"https://pith.science/pith/GJRCGTO2WWFU6S5RKLSNTTOIEF/action/replication_record"}},"created_at":"2026-05-18T00:33:06.171215+00:00","updated_at":"2026-05-18T00:33:06.171215+00:00"}