{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:WFXTGZS7HXMYAORFFRATCNKR7N","short_pith_number":"pith:WFXTGZS7","canonical_record":{"source":{"id":"1512.07995","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-25T13:22:10Z","cross_cats_sorted":[],"title_canon_sha256":"115152d408883d0f6a28d861ab86497c84639319cfbc443aa07319e4e71b506c","abstract_canon_sha256":"67bdf46e27faa672a954072264427fd7a87d4740ee98b754971a2c7e15caa8b8"},"schema_version":"1.0"},"canonical_sha256":"b16f33665f3dd9803a252c41313551fb4ec8f36494974f4319720b1ba262b4e7","source":{"kind":"arxiv","id":"1512.07995","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.07995","created_at":"2026-05-18T01:23:43Z"},{"alias_kind":"arxiv_version","alias_value":"1512.07995v1","created_at":"2026-05-18T01:23:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.07995","created_at":"2026-05-18T01:23:43Z"},{"alias_kind":"pith_short_12","alias_value":"WFXTGZS7HXMY","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WFXTGZS7HXMYAORF","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WFXTGZS7","created_at":"2026-05-18T12:29:47Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:WFXTGZS7HXMYAORFFRATCNKR7N","target":"record","payload":{"canonical_record":{"source":{"id":"1512.07995","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-25T13:22:10Z","cross_cats_sorted":[],"title_canon_sha256":"115152d408883d0f6a28d861ab86497c84639319cfbc443aa07319e4e71b506c","abstract_canon_sha256":"67bdf46e27faa672a954072264427fd7a87d4740ee98b754971a2c7e15caa8b8"},"schema_version":"1.0"},"canonical_sha256":"b16f33665f3dd9803a252c41313551fb4ec8f36494974f4319720b1ba262b4e7","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:23:43.645434Z","signature_b64":"yLox+oAM3NZV+gveWo207WtQdchcT9l/tfIcnZ0Cm7X0SUMbH+p+S0FxWvTTLPHKeEcglMvcidHupvZ1VuQ0Cw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b16f33665f3dd9803a252c41313551fb4ec8f36494974f4319720b1ba262b4e7","last_reissued_at":"2026-05-18T01:23:43.644701Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:23:43.644701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1512.07995","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":"2026-05-18T01:23:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mh795a1Fs/WFAR0bFO9ILIBfN3KxrL/0HQp+rF0AfDYr9p64DzfW+qXC7pxd61AdENN0X18k3Ec2ov1hnxFjBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T18:13:54.706974Z"},"content_sha256":"7ff897f23e24ae31a269d0acf0037f90f647039ddafa763ea69a7cfa9b8318ed","schema_version":"1.0","event_id":"sha256:7ff897f23e24ae31a269d0acf0037f90f647039ddafa763ea69a7cfa9b8318ed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:WFXTGZS7HXMYAORFFRATCNKR7N","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Near-IR photoluminescence from Si/Ge nanowire grown silicon wafers: effect of HF treatment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Peter Werner, Seref Kalem, Vadim Talalaev","submitted_at":"2015-12-25T13:22:10Z","abstract_excerpt":"We present the room temperature (RT) near-infrared (NIR) photoluminescence (PL) properties of Si/Ge nanowire (NW) grown silicon wafers which were treated by vapor of HF:HNO3 chemical mixture. This treatment activates or enhances the PL intensity at NIR region ranging from 1000 nm to 1800 nm. The PL consists of a silicon band-edge emission and a broad composite band which was centered at around 1400-1600 nm. The treatment modifies the wafer surface particularly at defect sites particularly pits around NWs and NW surfaces by etching and oxidation of Si and Ge. This process can induce spatial con"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.07995","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:23:43Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gBYEvV0SZ4Nr0uC9BaNKYwV4kf1Op0p2fXURj+qedQF9dFKgZjPB/hNgsTNXhOAHA3o76TEO0O8lKOxsDCTcDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T18:13:54.707764Z"},"content_sha256":"1983cccc84718e21fb9b8f56cc99f5da910d28aa99867c905221099bc4c2a08d","schema_version":"1.0","event_id":"sha256:1983cccc84718e21fb9b8f56cc99f5da910d28aa99867c905221099bc4c2a08d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WFXTGZS7HXMYAORFFRATCNKR7N/bundle.json","state_url":"https://pith.science/pith/WFXTGZS7HXMYAORFFRATCNKR7N/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WFXTGZS7HXMYAORFFRATCNKR7N/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":"2026-06-09T18:13:54Z","links":{"resolver":"https://pith.science/pith/WFXTGZS7HXMYAORFFRATCNKR7N","bundle":"https://pith.science/pith/WFXTGZS7HXMYAORFFRATCNKR7N/bundle.json","state":"https://pith.science/pith/WFXTGZS7HXMYAORFFRATCNKR7N/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WFXTGZS7HXMYAORFFRATCNKR7N/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:WFXTGZS7HXMYAORFFRATCNKR7N","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":"67bdf46e27faa672a954072264427fd7a87d4740ee98b754971a2c7e15caa8b8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-25T13:22:10Z","title_canon_sha256":"115152d408883d0f6a28d861ab86497c84639319cfbc443aa07319e4e71b506c"},"schema_version":"1.0","source":{"id":"1512.07995","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1512.07995","created_at":"2026-05-18T01:23:43Z"},{"alias_kind":"arxiv_version","alias_value":"1512.07995v1","created_at":"2026-05-18T01:23:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1512.07995","created_at":"2026-05-18T01:23:43Z"},{"alias_kind":"pith_short_12","alias_value":"WFXTGZS7HXMY","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_16","alias_value":"WFXTGZS7HXMYAORF","created_at":"2026-05-18T12:29:47Z"},{"alias_kind":"pith_short_8","alias_value":"WFXTGZS7","created_at":"2026-05-18T12:29:47Z"}],"graph_snapshots":[{"event_id":"sha256:1983cccc84718e21fb9b8f56cc99f5da910d28aa99867c905221099bc4c2a08d","target":"graph","created_at":"2026-05-18T01:23:43Z","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 present the room temperature (RT) near-infrared (NIR) photoluminescence (PL) properties of Si/Ge nanowire (NW) grown silicon wafers which were treated by vapor of HF:HNO3 chemical mixture. This treatment activates or enhances the PL intensity at NIR region ranging from 1000 nm to 1800 nm. The PL consists of a silicon band-edge emission and a broad composite band which was centered at around 1400-1600 nm. The treatment modifies the wafer surface particularly at defect sites particularly pits around NWs and NW surfaces by etching and oxidation of Si and Ge. This process can induce spatial con","authors_text":"Peter Werner, Seref Kalem, Vadim Talalaev","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-25T13:22:10Z","title":"Near-IR photoluminescence from Si/Ge nanowire grown silicon wafers: effect of HF treatment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1512.07995","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":"sha256:7ff897f23e24ae31a269d0acf0037f90f647039ddafa763ea69a7cfa9b8318ed","target":"record","created_at":"2026-05-18T01:23:43Z","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":"67bdf46e27faa672a954072264427fd7a87d4740ee98b754971a2c7e15caa8b8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-12-25T13:22:10Z","title_canon_sha256":"115152d408883d0f6a28d861ab86497c84639319cfbc443aa07319e4e71b506c"},"schema_version":"1.0","source":{"id":"1512.07995","kind":"arxiv","version":1}},"canonical_sha256":"b16f33665f3dd9803a252c41313551fb4ec8f36494974f4319720b1ba262b4e7","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b16f33665f3dd9803a252c41313551fb4ec8f36494974f4319720b1ba262b4e7","first_computed_at":"2026-05-18T01:23:43.644701Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:43.644701Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"yLox+oAM3NZV+gveWo207WtQdchcT9l/tfIcnZ0Cm7X0SUMbH+p+S0FxWvTTLPHKeEcglMvcidHupvZ1VuQ0Cw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:43.645434Z","signed_message":"canonical_sha256_bytes"},"source_id":"1512.07995","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7ff897f23e24ae31a269d0acf0037f90f647039ddafa763ea69a7cfa9b8318ed","sha256:1983cccc84718e21fb9b8f56cc99f5da910d28aa99867c905221099bc4c2a08d"],"state_sha256":"b94c46c17ece1000b2bf306c93e3a723b4eed95fa998001402b7ea5ecbd3c61c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nOmzKrPk0g4cDxzwpthdNE7mnuHHb5P5frOE46jWQAhR1N9kN9Cyhy95ofk/SOMaSlUEkwUPBFCqZX5+dEzNCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T18:13:54.711735Z","bundle_sha256":"625ed2e984b9e5ade9b692d5ad9869ea74435141de4d4347cd5e14669fe79bb1"}}