{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:C2EEDTN3P4YSDSR7EVHYCHJTWR","short_pith_number":"pith:C2EEDTN3","canonical_record":{"source":{"id":"1909.08889","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-19T09:45:12Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"b9f1998b3e44c9361525f87b10c7fa81b8113ddb9daa8edf8fb04dc4f5645876","abstract_canon_sha256":"d83d3bd606ea7ab1bfa4cb896013813342cf801212f158efcdb85b3867a21cf6"},"schema_version":"1.0"},"canonical_sha256":"168841cdbb7f3121ca3f254f811d33b44762359f68421c3254866cd5b343b898","source":{"kind":"arxiv","id":"1909.08889","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.08889","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"arxiv_version","alias_value":"1909.08889v1","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.08889","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"pith_short_12","alias_value":"C2EEDTN3P4YS","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"pith_short_16","alias_value":"C2EEDTN3P4YSDSR7","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"pith_short_8","alias_value":"C2EEDTN3","created_at":"2026-07-05T00:05:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:C2EEDTN3P4YSDSR7EVHYCHJTWR","target":"record","payload":{"canonical_record":{"source":{"id":"1909.08889","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-19T09:45:12Z","cross_cats_sorted":["physics.app-ph"],"title_canon_sha256":"b9f1998b3e44c9361525f87b10c7fa81b8113ddb9daa8edf8fb04dc4f5645876","abstract_canon_sha256":"d83d3bd606ea7ab1bfa4cb896013813342cf801212f158efcdb85b3867a21cf6"},"schema_version":"1.0"},"canonical_sha256":"168841cdbb7f3121ca3f254f811d33b44762359f68421c3254866cd5b343b898","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:05:38.798276Z","signature_b64":"7NAtNPYPqkLTO3HOAarX9NVPY/6fPjAwjUBq7U9Tshh4+eBhYWDQQRWE1hZTojDmC7wghaYMRVXkjKfBEC0jDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"168841cdbb7f3121ca3f254f811d33b44762359f68421c3254866cd5b343b898","last_reissued_at":"2026-07-05T00:05:38.797886Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:05:38.797886Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1909.08889","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":"2026-07-05T00:05:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YZwFP4Yh1oZn9Bg8UouG/Au1OHuoTv3tuOlH9pK5cMRrRJY9cxncz/SqFIV/wmBh6ifGVg+EJ0O92VRSctZuAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T14:49:56.581463Z"},"content_sha256":"630b5c285976f6581737dbec3a9ed2d6d4999dad733fb7245b9141a4688a5c03","schema_version":"1.0","event_id":"sha256:630b5c285976f6581737dbec3a9ed2d6d4999dad733fb7245b9141a4688a5c03"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:C2EEDTN3P4YSDSR7EVHYCHJTWR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Polymer Nanoreactors Shield Perovskite Nanocrystals from Degradation","license":"http://creativecommons.org/licenses/by-sa/4.0/","headline":"","cross_cats":["physics.app-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Alexander S. Urban, Anton X. B\\\"ohm, Bert Nickel, Carola Lampe, Cornelia Sattler, Janina Roemer, Maximilian L\\\"ow, Moritz Gramlich, Theobald Lohm\\\"uller, Verena A. Hintermayr, Willem Vanderlinden","submitted_at":"2019-09-19T09:45:12Z","abstract_excerpt":"Halide perovskite nanocrystals (NCs) have shown impressive advances, exhibiting optical properties that outpace conventional semiconductor NCs, such as near-unity quantum yields and ultrafast radiative decay rates. Nevertheless, the NCs suffer even more from stability problems at ambient conditions and due to moisture than their bulk counterparts. Herein, we report a strategy of employing polymer micelles as nanoreactors for the synthesis of methylammonium lead trihalide perovskite NCs. Encapsulated by this polymer shell, the NCs display strong stability against water degradation and halide io"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.08889","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/1909.08889/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":"2026-07-05T00:05:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dOr490bfe5ePBTEZK7g0wOimJi+c0NnJhhiNF1KO4G9BMd+sotKUDIu/UdVQlZtX6JoDE6SUUNFBCBZV/ViSBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T14:49:56.581854Z"},"content_sha256":"726e2b6eec84adedb6c99d4e2bd2756ebcff6e8797c35749fb029ae277e6e9be","schema_version":"1.0","event_id":"sha256:726e2b6eec84adedb6c99d4e2bd2756ebcff6e8797c35749fb029ae277e6e9be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/C2EEDTN3P4YSDSR7EVHYCHJTWR/bundle.json","state_url":"https://pith.science/pith/C2EEDTN3P4YSDSR7EVHYCHJTWR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/C2EEDTN3P4YSDSR7EVHYCHJTWR/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":"2026-07-06T14:49:56Z","links":{"resolver":"https://pith.science/pith/C2EEDTN3P4YSDSR7EVHYCHJTWR","bundle":"https://pith.science/pith/C2EEDTN3P4YSDSR7EVHYCHJTWR/bundle.json","state":"https://pith.science/pith/C2EEDTN3P4YSDSR7EVHYCHJTWR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/C2EEDTN3P4YSDSR7EVHYCHJTWR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:C2EEDTN3P4YSDSR7EVHYCHJTWR","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":"d83d3bd606ea7ab1bfa4cb896013813342cf801212f158efcdb85b3867a21cf6","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-19T09:45:12Z","title_canon_sha256":"b9f1998b3e44c9361525f87b10c7fa81b8113ddb9daa8edf8fb04dc4f5645876"},"schema_version":"1.0","source":{"id":"1909.08889","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1909.08889","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"arxiv_version","alias_value":"1909.08889v1","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1909.08889","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"pith_short_12","alias_value":"C2EEDTN3P4YS","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"pith_short_16","alias_value":"C2EEDTN3P4YSDSR7","created_at":"2026-07-05T00:05:38Z"},{"alias_kind":"pith_short_8","alias_value":"C2EEDTN3","created_at":"2026-07-05T00:05:38Z"}],"graph_snapshots":[{"event_id":"sha256:726e2b6eec84adedb6c99d4e2bd2756ebcff6e8797c35749fb029ae277e6e9be","target":"graph","created_at":"2026-07-05T00:05:38Z","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/1909.08889/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Halide perovskite nanocrystals (NCs) have shown impressive advances, exhibiting optical properties that outpace conventional semiconductor NCs, such as near-unity quantum yields and ultrafast radiative decay rates. Nevertheless, the NCs suffer even more from stability problems at ambient conditions and due to moisture than their bulk counterparts. Herein, we report a strategy of employing polymer micelles as nanoreactors for the synthesis of methylammonium lead trihalide perovskite NCs. Encapsulated by this polymer shell, the NCs display strong stability against water degradation and halide io","authors_text":"Alexander S. Urban, Anton X. B\\\"ohm, Bert Nickel, Carola Lampe, Cornelia Sattler, Janina Roemer, Maximilian L\\\"ow, Moritz Gramlich, Theobald Lohm\\\"uller, Verena A. Hintermayr, Willem Vanderlinden","cross_cats":["physics.app-ph"],"headline":"","license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-19T09:45:12Z","title":"Polymer Nanoreactors Shield Perovskite Nanocrystals from Degradation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1909.08889","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":"sha256:630b5c285976f6581737dbec3a9ed2d6d4999dad733fb7245b9141a4688a5c03","target":"record","created_at":"2026-07-05T00:05:38Z","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":"d83d3bd606ea7ab1bfa4cb896013813342cf801212f158efcdb85b3867a21cf6","cross_cats_sorted":["physics.app-ph"],"license":"http://creativecommons.org/licenses/by-sa/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-09-19T09:45:12Z","title_canon_sha256":"b9f1998b3e44c9361525f87b10c7fa81b8113ddb9daa8edf8fb04dc4f5645876"},"schema_version":"1.0","source":{"id":"1909.08889","kind":"arxiv","version":1}},"canonical_sha256":"168841cdbb7f3121ca3f254f811d33b44762359f68421c3254866cd5b343b898","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"168841cdbb7f3121ca3f254f811d33b44762359f68421c3254866cd5b343b898","first_computed_at":"2026-07-05T00:05:38.797886Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:05:38.797886Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7NAtNPYPqkLTO3HOAarX9NVPY/6fPjAwjUBq7U9Tshh4+eBhYWDQQRWE1hZTojDmC7wghaYMRVXkjKfBEC0jDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:05:38.798276Z","signed_message":"canonical_sha256_bytes"},"source_id":"1909.08889","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:630b5c285976f6581737dbec3a9ed2d6d4999dad733fb7245b9141a4688a5c03","sha256:726e2b6eec84adedb6c99d4e2bd2756ebcff6e8797c35749fb029ae277e6e9be"],"state_sha256":"91465f09f80b5d48b4b7176862122a6b467f335e7dc78bb845ed5de6ebea1e76"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZM+Q+uF95MGc9o8hKB+UK+EDfHvTJRZ4mT8hC11ToYc2wxNSGAmNW24cIUavPV++eOxeUatham+rXHmfoZh6BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T14:49:56.583926Z","bundle_sha256":"52c177848c3f2d03c621ddd0bce3b95b9a8db6745263497af4a9916fc2fc3d9d"}}