{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:QIEO7JDPCELZBNZCUST7JJF47V","short_pith_number":"pith:QIEO7JDP","canonical_record":{"source":{"id":"2112.10004","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-12-18T21:27:45Z","cross_cats_sorted":[],"title_canon_sha256":"733913be2c776f0e4ea8e29479548aed9510bd010d61c77bb399d9fb0cfd3299","abstract_canon_sha256":"4c3d7e3b79b5dd2469a9aebf97ffddcd7a383351cbf03f87a4dcb730db1474d5"},"schema_version":"1.0"},"canonical_sha256":"8208efa46f111790b722a4a7f4a4bcfd516c97d2bb8a7ee2362f703a2547f881","source":{"kind":"arxiv","id":"2112.10004","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.10004","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"arxiv_version","alias_value":"2112.10004v1","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.10004","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"pith_short_12","alias_value":"QIEO7JDPCELZ","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"pith_short_16","alias_value":"QIEO7JDPCELZBNZC","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"pith_short_8","alias_value":"QIEO7JDP","created_at":"2026-07-05T03:42:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:QIEO7JDPCELZBNZCUST7JJF47V","target":"record","payload":{"canonical_record":{"source":{"id":"2112.10004","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-12-18T21:27:45Z","cross_cats_sorted":[],"title_canon_sha256":"733913be2c776f0e4ea8e29479548aed9510bd010d61c77bb399d9fb0cfd3299","abstract_canon_sha256":"4c3d7e3b79b5dd2469a9aebf97ffddcd7a383351cbf03f87a4dcb730db1474d5"},"schema_version":"1.0"},"canonical_sha256":"8208efa46f111790b722a4a7f4a4bcfd516c97d2bb8a7ee2362f703a2547f881","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:42:10.041430Z","signature_b64":"hwpVdvtaiQOCVY3VrkAvfLGpiOShqHCXpULsQnnAu0s6ZKhzjEoVGg4pz41wBdU3CqKnV+3zOboWwYBdO5pWCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8208efa46f111790b722a4a7f4a4bcfd516c97d2bb8a7ee2362f703a2547f881","last_reissued_at":"2026-07-05T03:42:10.040988Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:42:10.040988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2112.10004","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":"2026-07-05T03:42:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XIYd1gjyLIJL/Wq1JBTACtRQmk9nIsPrEwkhycRfvgusaXqPth0YKJ0ZLHG0wncBjRauy/h6VQjNEu3Qa8vGBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T21:49:00.738467Z"},"content_sha256":"b7760c28f474efaa1835c40b42e1562d892ab0a6dc848df3c12e9b14f3c38878","schema_version":"1.0","event_id":"sha256:b7760c28f474efaa1835c40b42e1562d892ab0a6dc848df3c12e9b14f3c38878"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:QIEO7JDPCELZBNZCUST7JJF47V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Impact of the Ligand Shell on Structural Changes and Decomposition of All-Inorganic Mixed-Halide Perovskite (CsPbX3) Nanocrystals under X-Ray Illumination","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Christopher Kirsch, Dameli Assalauova, Heiko Peisert, Ivan A. Vartanyants, Ivan Zaluzhnyy, Jan Wahl, Marcus Scheele, Nastasia Mukharamova, Philipp Haizmann, Rene Frecot, Thomas Chass\\'e, Young Yong Kim","submitted_at":"2021-12-18T21:27:45Z","abstract_excerpt":"We show that the decomposition of caesium lead halide perovskite nanocrystals under continuous X-ray illumination depends on the surface ligand. For oleic acid/oleylamine, we observe a fast decay accompanied by the formation of elemental lead and halogen. Upon surface functionalization with a metal porphyrin derivate, the decay is markedly slower and involves the disproportionation of lead to Pb0 and Pb3+. In both cases, the decomposition is preceded by a contraction of the atomic lattice, which appears to initiate the decay. We find that the metal porphyrin derivative induces a strong surface"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.10004","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2112.10004/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T03:42:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nGrLc4D/l61NrnNLT9jJ3f+Mlb4dtacq2Q4gTxnL7soCbIbDmAUGDXSUmu1Qy5Z3c2wMta5tyecdtfj15dgUAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T21:49:00.738836Z"},"content_sha256":"589a47850198ea80d5faa3f957152516e662681ad4d4dd1f7d1fce2a4939655b","schema_version":"1.0","event_id":"sha256:589a47850198ea80d5faa3f957152516e662681ad4d4dd1f7d1fce2a4939655b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QIEO7JDPCELZBNZCUST7JJF47V/bundle.json","state_url":"https://pith.science/pith/QIEO7JDPCELZBNZCUST7JJF47V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QIEO7JDPCELZBNZCUST7JJF47V/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":"2026-07-06T21:49:00Z","links":{"resolver":"https://pith.science/pith/QIEO7JDPCELZBNZCUST7JJF47V","bundle":"https://pith.science/pith/QIEO7JDPCELZBNZCUST7JJF47V/bundle.json","state":"https://pith.science/pith/QIEO7JDPCELZBNZCUST7JJF47V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QIEO7JDPCELZBNZCUST7JJF47V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:QIEO7JDPCELZBNZCUST7JJF47V","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":"4c3d7e3b79b5dd2469a9aebf97ffddcd7a383351cbf03f87a4dcb730db1474d5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-12-18T21:27:45Z","title_canon_sha256":"733913be2c776f0e4ea8e29479548aed9510bd010d61c77bb399d9fb0cfd3299"},"schema_version":"1.0","source":{"id":"2112.10004","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2112.10004","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"arxiv_version","alias_value":"2112.10004v1","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2112.10004","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"pith_short_12","alias_value":"QIEO7JDPCELZ","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"pith_short_16","alias_value":"QIEO7JDPCELZBNZC","created_at":"2026-07-05T03:42:10Z"},{"alias_kind":"pith_short_8","alias_value":"QIEO7JDP","created_at":"2026-07-05T03:42:10Z"}],"graph_snapshots":[{"event_id":"sha256:589a47850198ea80d5faa3f957152516e662681ad4d4dd1f7d1fce2a4939655b","target":"graph","created_at":"2026-07-05T03:42:10Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2112.10004/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that the decomposition of caesium lead halide perovskite nanocrystals under continuous X-ray illumination depends on the surface ligand. For oleic acid/oleylamine, we observe a fast decay accompanied by the formation of elemental lead and halogen. Upon surface functionalization with a metal porphyrin derivate, the decay is markedly slower and involves the disproportionation of lead to Pb0 and Pb3+. In both cases, the decomposition is preceded by a contraction of the atomic lattice, which appears to initiate the decay. We find that the metal porphyrin derivative induces a strong surface","authors_text":"Christopher Kirsch, Dameli Assalauova, Heiko Peisert, Ivan A. Vartanyants, Ivan Zaluzhnyy, Jan Wahl, Marcus Scheele, Nastasia Mukharamova, Philipp Haizmann, Rene Frecot, Thomas Chass\\'e, Young Yong Kim","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-12-18T21:27:45Z","title":"Impact of the Ligand Shell on Structural Changes and Decomposition of All-Inorganic Mixed-Halide Perovskite (CsPbX3) Nanocrystals under X-Ray Illumination"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.10004","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:b7760c28f474efaa1835c40b42e1562d892ab0a6dc848df3c12e9b14f3c38878","target":"record","created_at":"2026-07-05T03:42:10Z","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":"4c3d7e3b79b5dd2469a9aebf97ffddcd7a383351cbf03f87a4dcb730db1474d5","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-12-18T21:27:45Z","title_canon_sha256":"733913be2c776f0e4ea8e29479548aed9510bd010d61c77bb399d9fb0cfd3299"},"schema_version":"1.0","source":{"id":"2112.10004","kind":"arxiv","version":1}},"canonical_sha256":"8208efa46f111790b722a4a7f4a4bcfd516c97d2bb8a7ee2362f703a2547f881","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8208efa46f111790b722a4a7f4a4bcfd516c97d2bb8a7ee2362f703a2547f881","first_computed_at":"2026-07-05T03:42:10.040988Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:42:10.040988Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hwpVdvtaiQOCVY3VrkAvfLGpiOShqHCXpULsQnnAu0s6ZKhzjEoVGg4pz41wBdU3CqKnV+3zOboWwYBdO5pWCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:42:10.041430Z","signed_message":"canonical_sha256_bytes"},"source_id":"2112.10004","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7760c28f474efaa1835c40b42e1562d892ab0a6dc848df3c12e9b14f3c38878","sha256:589a47850198ea80d5faa3f957152516e662681ad4d4dd1f7d1fce2a4939655b"],"state_sha256":"e7cc4c2b91bcd3d8f9db99bd0f15f1d16300657e097b9cd432e43b59403cf526"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"n2nILtipRiZy+x8a879bx5MNDHJUOldDXArZqhTv/vswJNzFCKgy35HUOSfzQT3+2gNwmtZTm2t4PMJhrbRhBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T21:49:00.741031Z","bundle_sha256":"162e95bdc378a30037c256f706141ea0bb389e67536f46a9d8517d7227b036ab"}}