{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:I7AXA3A6LUIFPCTEKKG265DDF2","short_pith_number":"pith:I7AXA3A6","canonical_record":{"source":{"id":"1802.09735","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-27T06:19:19Z","cross_cats_sorted":[],"title_canon_sha256":"4f55fda5ce25aa63964c1e2ba82bcdca93622555167d5ab42659d4d3706fc76e","abstract_canon_sha256":"a78143b4d770b4df2e639fc4f8cb83c580803ea284ad57a4c4bae7a38ef83f70"},"schema_version":"1.0"},"canonical_sha256":"47c1706c1e5d10578a64528daf74632e91d37c10591a260094b757059d127cca","source":{"kind":"arxiv","id":"1802.09735","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.09735","created_at":"2026-05-17T23:54:16Z"},{"alias_kind":"arxiv_version","alias_value":"1802.09735v2","created_at":"2026-05-17T23:54:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.09735","created_at":"2026-05-17T23:54:16Z"},{"alias_kind":"pith_short_12","alias_value":"I7AXA3A6LUIF","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"I7AXA3A6LUIFPCTE","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"I7AXA3A6","created_at":"2026-05-18T12:32:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:I7AXA3A6LUIFPCTEKKG265DDF2","target":"record","payload":{"canonical_record":{"source":{"id":"1802.09735","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-27T06:19:19Z","cross_cats_sorted":[],"title_canon_sha256":"4f55fda5ce25aa63964c1e2ba82bcdca93622555167d5ab42659d4d3706fc76e","abstract_canon_sha256":"a78143b4d770b4df2e639fc4f8cb83c580803ea284ad57a4c4bae7a38ef83f70"},"schema_version":"1.0"},"canonical_sha256":"47c1706c1e5d10578a64528daf74632e91d37c10591a260094b757059d127cca","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:16.682057Z","signature_b64":"65JtXbTxlFFe73RRgjkpbMOZGFp8emXW3WfaY7qDk6z7cNHk8INsaxPPfK0z4kmZS/4h+Sy1RErE6ViMs+cpBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"47c1706c1e5d10578a64528daf74632e91d37c10591a260094b757059d127cca","last_reissued_at":"2026-05-17T23:54:16.681534Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:16.681534Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.09735","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:54:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GqtldiTge+N2bXHuIJivxd4EUrLlIbeTw7/e2A8hSIU//11FHm29uugeUUujAeWrMPTOQyx3GqUbRVYSzZdnBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:17:15.073354Z"},"content_sha256":"0ed3b495410790e47972e14f96c80b614d366714bcde0b4fbbd86f0f804f0126","schema_version":"1.0","event_id":"sha256:0ed3b495410790e47972e14f96c80b614d366714bcde0b4fbbd86f0f804f0126"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:I7AXA3A6LUIFPCTEKKG265DDF2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Free-standing bialkali photocathodes using atomically thin substrates","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Aditya D. Mohite, Claudia W. Narvaez Villarrubia, Derek Strom, Fangze Liu, Hisato Yamaguchi, Jeffrey DeFazio, John Sinsheimer, John Smedley, Junqi Xie, Kevin L. Jensen, Mengjia Gaowei, Nathan A. Moody, Vitaly Pavlenko","submitted_at":"2018-02-27T06:19:19Z","abstract_excerpt":"We report successful deposition of high quantum efficiency (QE) bialkali antimonide K2CsSb photocathodes on graphene films. The results pave a pathway towards an ultimate goal of encapsulating technologically-relevant photocathodes for accelerator technology with an atomically-thin protecting layer to enhance lifetime while minimizing QE losses. A QE of 17 % at ~3.1 eV (405 nm) is the highest value reported so far on graphene substrates and is comparable to that obtained on stainless steel and nickel reference substrates. The spectral responses of the photocathodes on graphene exhibit signatur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.09735","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:54:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"004lz6HEsuyUfTgF0WpcNyreyh8H5/DxQz6X3yvyXJD+1GFUvDmHchCYK7HvPEwlu+bfEYhbtw4UEEgmejq+BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T18:17:15.074018Z"},"content_sha256":"6d8f144fa83da994b8cd820a18745301200bc8a3cd8ee84ed7fae62a380c7431","schema_version":"1.0","event_id":"sha256:6d8f144fa83da994b8cd820a18745301200bc8a3cd8ee84ed7fae62a380c7431"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/I7AXA3A6LUIFPCTEKKG265DDF2/bundle.json","state_url":"https://pith.science/pith/I7AXA3A6LUIFPCTEKKG265DDF2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/I7AXA3A6LUIFPCTEKKG265DDF2/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":"2026-05-28T18:17:15Z","links":{"resolver":"https://pith.science/pith/I7AXA3A6LUIFPCTEKKG265DDF2","bundle":"https://pith.science/pith/I7AXA3A6LUIFPCTEKKG265DDF2/bundle.json","state":"https://pith.science/pith/I7AXA3A6LUIFPCTEKKG265DDF2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/I7AXA3A6LUIFPCTEKKG265DDF2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:I7AXA3A6LUIFPCTEKKG265DDF2","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":"a78143b4d770b4df2e639fc4f8cb83c580803ea284ad57a4c4bae7a38ef83f70","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-27T06:19:19Z","title_canon_sha256":"4f55fda5ce25aa63964c1e2ba82bcdca93622555167d5ab42659d4d3706fc76e"},"schema_version":"1.0","source":{"id":"1802.09735","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.09735","created_at":"2026-05-17T23:54:16Z"},{"alias_kind":"arxiv_version","alias_value":"1802.09735v2","created_at":"2026-05-17T23:54:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.09735","created_at":"2026-05-17T23:54:16Z"},{"alias_kind":"pith_short_12","alias_value":"I7AXA3A6LUIF","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_16","alias_value":"I7AXA3A6LUIFPCTE","created_at":"2026-05-18T12:32:28Z"},{"alias_kind":"pith_short_8","alias_value":"I7AXA3A6","created_at":"2026-05-18T12:32:28Z"}],"graph_snapshots":[{"event_id":"sha256:6d8f144fa83da994b8cd820a18745301200bc8a3cd8ee84ed7fae62a380c7431","target":"graph","created_at":"2026-05-17T23:54:16Z","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":"We report successful deposition of high quantum efficiency (QE) bialkali antimonide K2CsSb photocathodes on graphene films. The results pave a pathway towards an ultimate goal of encapsulating technologically-relevant photocathodes for accelerator technology with an atomically-thin protecting layer to enhance lifetime while minimizing QE losses. A QE of 17 % at ~3.1 eV (405 nm) is the highest value reported so far on graphene substrates and is comparable to that obtained on stainless steel and nickel reference substrates. The spectral responses of the photocathodes on graphene exhibit signatur","authors_text":"Aditya D. Mohite, Claudia W. Narvaez Villarrubia, Derek Strom, Fangze Liu, Hisato Yamaguchi, Jeffrey DeFazio, John Sinsheimer, John Smedley, Junqi Xie, Kevin L. Jensen, Mengjia Gaowei, Nathan A. Moody, Vitaly Pavlenko","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-27T06:19:19Z","title":"Free-standing bialkali photocathodes using atomically thin substrates"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.09735","kind":"arxiv","version":2},"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":"sha256:0ed3b495410790e47972e14f96c80b614d366714bcde0b4fbbd86f0f804f0126","target":"record","created_at":"2026-05-17T23:54:16Z","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":"a78143b4d770b4df2e639fc4f8cb83c580803ea284ad57a4c4bae7a38ef83f70","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-27T06:19:19Z","title_canon_sha256":"4f55fda5ce25aa63964c1e2ba82bcdca93622555167d5ab42659d4d3706fc76e"},"schema_version":"1.0","source":{"id":"1802.09735","kind":"arxiv","version":2}},"canonical_sha256":"47c1706c1e5d10578a64528daf74632e91d37c10591a260094b757059d127cca","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"47c1706c1e5d10578a64528daf74632e91d37c10591a260094b757059d127cca","first_computed_at":"2026-05-17T23:54:16.681534Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:16.681534Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"65JtXbTxlFFe73RRgjkpbMOZGFp8emXW3WfaY7qDk6z7cNHk8INsaxPPfK0z4kmZS/4h+Sy1RErE6ViMs+cpBA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:16.682057Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.09735","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0ed3b495410790e47972e14f96c80b614d366714bcde0b4fbbd86f0f804f0126","sha256:6d8f144fa83da994b8cd820a18745301200bc8a3cd8ee84ed7fae62a380c7431"],"state_sha256":"1eed7abfc95a8ee65c7c53813f030a3ffd66a96c544da63c9b8b0709376de772"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eNg+TMM6a4ptT/WIjVoVG2wSkFY5XnwIb2iVAOyCNJaJ3z92Tn/mXt3wHzESWQdXD/5NMs5om7/b4EspESQPDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T18:17:15.077610Z","bundle_sha256":"2ed25b8267d444a3f5643dc15c90fa90900152144efc6b672b57e6d421720838"}}