{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:6QWYALYPIHKHR3EIO42KWIHBTK","short_pith_number":"pith:6QWYALYP","canonical_record":{"source":{"id":"1407.2016","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-07-08T09:53:04Z","cross_cats_sorted":[],"title_canon_sha256":"f3e253cacc8da47c8f3661c1d0838876e7dab4f143fc96373ed59cb3c80acd22","abstract_canon_sha256":"f983abbc6b4c2648709f39a23da40133b8ca1b40fbf121492b81cdb4842a8d54"},"schema_version":"1.0"},"canonical_sha256":"f42d802f0f41d478ec887734ab20e19ab163d1962d5d521cfc2c498dc157d3a6","source":{"kind":"arxiv","id":"1407.2016","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2016","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2016v2","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2016","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"pith_short_12","alias_value":"6QWYALYPIHKH","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"6QWYALYPIHKHR3EI","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"6QWYALYP","created_at":"2026-05-18T12:28:16Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:6QWYALYPIHKHR3EIO42KWIHBTK","target":"record","payload":{"canonical_record":{"source":{"id":"1407.2016","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-07-08T09:53:04Z","cross_cats_sorted":[],"title_canon_sha256":"f3e253cacc8da47c8f3661c1d0838876e7dab4f143fc96373ed59cb3c80acd22","abstract_canon_sha256":"f983abbc6b4c2648709f39a23da40133b8ca1b40fbf121492b81cdb4842a8d54"},"schema_version":"1.0"},"canonical_sha256":"f42d802f0f41d478ec887734ab20e19ab163d1962d5d521cfc2c498dc157d3a6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:48:01.896027Z","signature_b64":"6jg4P9BHPZqBq6du4TBoGNSTaxUILHjoQsb9GHcweb0pNqiJ6Vh8gPlnS1593UPnojSCKslPtAVvUmg1HlO1Aw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f42d802f0f41d478ec887734ab20e19ab163d1962d5d521cfc2c498dc157d3a6","last_reissued_at":"2026-05-18T02:48:01.895525Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:48:01.895525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.2016","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":"2026-05-18T02:48:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OTQ9vYnL74fwqJXnn9W2AevE3zEYAeei8vF9lwrPNfZjFNkVtLlmWEFDqHVzSU8bXVBp90ntk/BjyGiKCKjZCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:07:16.745406Z"},"content_sha256":"71baddcd374bfdcffd1e5e25725bd0b6387a9663d470998294ea5c8dd4a4768f","schema_version":"1.0","event_id":"sha256:71baddcd374bfdcffd1e5e25725bd0b6387a9663d470998294ea5c8dd4a4768f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:6QWYALYPIHKHR3EIO42KWIHBTK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Three dimensional valency mapping in CeO$_{2-x}$ nanocrystals","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Bart Goris, Gustaaf Van Tendeloo, Sara Bals, Stuart Turner","submitted_at":"2014-07-08T09:53:04Z","abstract_excerpt":"Using electron tomography in combination with spatially resolved electron energy-loss spectroscopy at high energy resolution, we are able to map the valency of the Ce ions in CeO$_{2-x}$ nanocrystals. Our three-dimensional results show a clear facet-dependent reduction shell at the surface of ceria nanoparticles; {111} surface facets show a low surface reduction, whereas at {001} surface facets the cerium ions are more likely to be reduced over a larger surface shell. The novelty of this generic tomographic technique is that it allows a full three dimensional datacube to be reconstructed, cont"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2016","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":"2026-05-18T02:48:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2VCkyrVIBH1PWxxg+/rv9/BmV0HFHxEYvwPaF46AuClVJHBF8Gcv9rwfZvxazcdh0DlpxRD6sKYcW3RawiDeBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T05:07:16.745745Z"},"content_sha256":"655b421fc1c5d4d732cbb8caaa784ca7709cd17d68c49a8f5bcd37bca5c05ab7","schema_version":"1.0","event_id":"sha256:655b421fc1c5d4d732cbb8caaa784ca7709cd17d68c49a8f5bcd37bca5c05ab7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/6QWYALYPIHKHR3EIO42KWIHBTK/bundle.json","state_url":"https://pith.science/pith/6QWYALYPIHKHR3EIO42KWIHBTK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/6QWYALYPIHKHR3EIO42KWIHBTK/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":"2026-06-04T05:07:16Z","links":{"resolver":"https://pith.science/pith/6QWYALYPIHKHR3EIO42KWIHBTK","bundle":"https://pith.science/pith/6QWYALYPIHKHR3EIO42KWIHBTK/bundle.json","state":"https://pith.science/pith/6QWYALYPIHKHR3EIO42KWIHBTK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/6QWYALYPIHKHR3EIO42KWIHBTK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:6QWYALYPIHKHR3EIO42KWIHBTK","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":"f983abbc6b4c2648709f39a23da40133b8ca1b40fbf121492b81cdb4842a8d54","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-07-08T09:53:04Z","title_canon_sha256":"f3e253cacc8da47c8f3661c1d0838876e7dab4f143fc96373ed59cb3c80acd22"},"schema_version":"1.0","source":{"id":"1407.2016","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.2016","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"arxiv_version","alias_value":"1407.2016v2","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.2016","created_at":"2026-05-18T02:48:01Z"},{"alias_kind":"pith_short_12","alias_value":"6QWYALYPIHKH","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_16","alias_value":"6QWYALYPIHKHR3EI","created_at":"2026-05-18T12:28:16Z"},{"alias_kind":"pith_short_8","alias_value":"6QWYALYP","created_at":"2026-05-18T12:28:16Z"}],"graph_snapshots":[{"event_id":"sha256:655b421fc1c5d4d732cbb8caaa784ca7709cd17d68c49a8f5bcd37bca5c05ab7","target":"graph","created_at":"2026-05-18T02:48:01Z","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":"Using electron tomography in combination with spatially resolved electron energy-loss spectroscopy at high energy resolution, we are able to map the valency of the Ce ions in CeO$_{2-x}$ nanocrystals. Our three-dimensional results show a clear facet-dependent reduction shell at the surface of ceria nanoparticles; {111} surface facets show a low surface reduction, whereas at {001} surface facets the cerium ions are more likely to be reduced over a larger surface shell. The novelty of this generic tomographic technique is that it allows a full three dimensional datacube to be reconstructed, cont","authors_text":"Bart Goris, Gustaaf Van Tendeloo, Sara Bals, Stuart Turner","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-07-08T09:53:04Z","title":"Three dimensional valency mapping in CeO$_{2-x}$ nanocrystals"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.2016","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":"sha256:71baddcd374bfdcffd1e5e25725bd0b6387a9663d470998294ea5c8dd4a4768f","target":"record","created_at":"2026-05-18T02:48:01Z","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":"f983abbc6b4c2648709f39a23da40133b8ca1b40fbf121492b81cdb4842a8d54","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2014-07-08T09:53:04Z","title_canon_sha256":"f3e253cacc8da47c8f3661c1d0838876e7dab4f143fc96373ed59cb3c80acd22"},"schema_version":"1.0","source":{"id":"1407.2016","kind":"arxiv","version":2}},"canonical_sha256":"f42d802f0f41d478ec887734ab20e19ab163d1962d5d521cfc2c498dc157d3a6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f42d802f0f41d478ec887734ab20e19ab163d1962d5d521cfc2c498dc157d3a6","first_computed_at":"2026-05-18T02:48:01.895525Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:48:01.895525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6jg4P9BHPZqBq6du4TBoGNSTaxUILHjoQsb9GHcweb0pNqiJ6Vh8gPlnS1593UPnojSCKslPtAVvUmg1HlO1Aw==","signature_status":"signed_v1","signed_at":"2026-05-18T02:48:01.896027Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.2016","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:71baddcd374bfdcffd1e5e25725bd0b6387a9663d470998294ea5c8dd4a4768f","sha256:655b421fc1c5d4d732cbb8caaa784ca7709cd17d68c49a8f5bcd37bca5c05ab7"],"state_sha256":"2fa162787684f890f495134b37f69c5776687862d0a4356c73a1f61d86e0fcfa"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FHAf0YEiiqh4art4mQzTU25W/IscmDVYZd74BAB29Nrpg14+osOyXw5UusAum22mYgYvQLrD+fhHy4fEmN1lDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T05:07:16.747700Z","bundle_sha256":"ec1cf3304ecd4a0d06fdc0835cea15dba3979c5dabefdea068a3b60e7454c712"}}