{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:GIHHKVAHIPCZPMAFK4W4DJ3K6C","short_pith_number":"pith:GIHHKVAH","canonical_record":{"source":{"id":"1911.01101","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-11-04T10:06:08Z","cross_cats_sorted":[],"title_canon_sha256":"d43e584a834050d8d2530626c5d6ac12ffa85927c0a1402b956058999244ef03","abstract_canon_sha256":"cef87cb55104fb2152d8df9f2b8a5b90a7d93558a146f72ed639513bedeaeea3"},"schema_version":"1.0"},"canonical_sha256":"320e75540743c597b005572dc1a76af09fbf0c706a1e6bb1bdd6c10785a24825","source":{"kind":"arxiv","id":"1911.01101","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.01101","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"arxiv_version","alias_value":"1911.01101v2","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.01101","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"pith_short_12","alias_value":"GIHHKVAHIPCZ","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"pith_short_16","alias_value":"GIHHKVAHIPCZPMAF","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"pith_short_8","alias_value":"GIHHKVAH","created_at":"2026-07-05T00:17:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:GIHHKVAHIPCZPMAFK4W4DJ3K6C","target":"record","payload":{"canonical_record":{"source":{"id":"1911.01101","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-11-04T10:06:08Z","cross_cats_sorted":[],"title_canon_sha256":"d43e584a834050d8d2530626c5d6ac12ffa85927c0a1402b956058999244ef03","abstract_canon_sha256":"cef87cb55104fb2152d8df9f2b8a5b90a7d93558a146f72ed639513bedeaeea3"},"schema_version":"1.0"},"canonical_sha256":"320e75540743c597b005572dc1a76af09fbf0c706a1e6bb1bdd6c10785a24825","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:17:19.491506Z","signature_b64":"cEareZ8Inj7JRGr/LbVVg7JGPCLd+Bpz+YbsIfXIhmd5L0dWjYC2yhQ5MLcrAA+hGgPqcbNdmjzWelfOqN/hBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"320e75540743c597b005572dc1a76af09fbf0c706a1e6bb1bdd6c10785a24825","last_reissued_at":"2026-07-05T00:17:19.491108Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:17:19.491108Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.01101","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":"2026-07-05T00:17:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gg3AcBbCn0pIo/iLLVitlxi8YVrSsP5YBQ46+0mbWt5M/5FkLII7aGOp5uLlCDyOAeAWjm8O2xBgrk7zwn3eDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:59:50.045025Z"},"content_sha256":"478a2a38793125b93cf832843e18c7861b810add8f0cd2bb3a82c5c1c89fc59f","schema_version":"1.0","event_id":"sha256:478a2a38793125b93cf832843e18c7861b810add8f0cd2bb3a82c5c1c89fc59f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:GIHHKVAHIPCZPMAFK4W4DJ3K6C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Deterministic direct growth of WS2 on CVD graphene arrays","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Camilla Coletti, Filippo Fabbri, Giulia Piccinini, Leonardo Martini, Sergio Pezzini, Stiven Forti, Ulrich Starke, Vaidotas Miseikis","submitted_at":"2019-11-04T10:06:08Z","abstract_excerpt":"The combination of the exciting properties of graphene with those of monolayer tungsten disulfide (WS2) makes this heterostack of great interest for electronic, optoelectronic and spintronic applications. The scalable synthesis of graphene/WS2 heterostructures on technologically attractive substrates like SiO2 would greatly facilitate the implementation of novel two-dimensional (2D) devices. In this work, we report the direct growth of monolayer WS2 via chemical vapor deposition (CVD) on single-crystal graphene arrays on SiO2. Remarkably, spectroscopic and microscopic characterization reveals "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.01101","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.01101/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":"2026-07-05T00:17:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vQQBFo0AKazCL5Ehq4XmMt6Le6Y608hX5Q2SwcRyi+QSF9W7zrbglnMaimErZjBe5FZiEDPDKaathGfxciE5CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T22:59:50.045584Z"},"content_sha256":"c6923fc0547df6cff01bea58380ca68cb83d4c6485cf83b8db82b106a2ada78a","schema_version":"1.0","event_id":"sha256:c6923fc0547df6cff01bea58380ca68cb83d4c6485cf83b8db82b106a2ada78a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/GIHHKVAHIPCZPMAFK4W4DJ3K6C/bundle.json","state_url":"https://pith.science/pith/GIHHKVAHIPCZPMAFK4W4DJ3K6C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/GIHHKVAHIPCZPMAFK4W4DJ3K6C/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":"2026-08-04T22:59:50Z","links":{"resolver":"https://pith.science/pith/GIHHKVAHIPCZPMAFK4W4DJ3K6C","bundle":"https://pith.science/pith/GIHHKVAHIPCZPMAFK4W4DJ3K6C/bundle.json","state":"https://pith.science/pith/GIHHKVAHIPCZPMAFK4W4DJ3K6C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/GIHHKVAHIPCZPMAFK4W4DJ3K6C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:GIHHKVAHIPCZPMAFK4W4DJ3K6C","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":"cef87cb55104fb2152d8df9f2b8a5b90a7d93558a146f72ed639513bedeaeea3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-11-04T10:06:08Z","title_canon_sha256":"d43e584a834050d8d2530626c5d6ac12ffa85927c0a1402b956058999244ef03"},"schema_version":"1.0","source":{"id":"1911.01101","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.01101","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"arxiv_version","alias_value":"1911.01101v2","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.01101","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"pith_short_12","alias_value":"GIHHKVAHIPCZ","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"pith_short_16","alias_value":"GIHHKVAHIPCZPMAF","created_at":"2026-07-05T00:17:19Z"},{"alias_kind":"pith_short_8","alias_value":"GIHHKVAH","created_at":"2026-07-05T00:17:19Z"}],"graph_snapshots":[{"event_id":"sha256:c6923fc0547df6cff01bea58380ca68cb83d4c6485cf83b8db82b106a2ada78a","target":"graph","created_at":"2026-07-05T00:17:19Z","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/1911.01101/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The combination of the exciting properties of graphene with those of monolayer tungsten disulfide (WS2) makes this heterostack of great interest for electronic, optoelectronic and spintronic applications. The scalable synthesis of graphene/WS2 heterostructures on technologically attractive substrates like SiO2 would greatly facilitate the implementation of novel two-dimensional (2D) devices. In this work, we report the direct growth of monolayer WS2 via chemical vapor deposition (CVD) on single-crystal graphene arrays on SiO2. Remarkably, spectroscopic and microscopic characterization reveals ","authors_text":"Camilla Coletti, Filippo Fabbri, Giulia Piccinini, Leonardo Martini, Sergio Pezzini, Stiven Forti, Ulrich Starke, Vaidotas Miseikis","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-11-04T10:06:08Z","title":"Deterministic direct growth of WS2 on CVD graphene arrays"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.01101","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":"sha256:478a2a38793125b93cf832843e18c7861b810add8f0cd2bb3a82c5c1c89fc59f","target":"record","created_at":"2026-07-05T00:17:19Z","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":"cef87cb55104fb2152d8df9f2b8a5b90a7d93558a146f72ed639513bedeaeea3","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-11-04T10:06:08Z","title_canon_sha256":"d43e584a834050d8d2530626c5d6ac12ffa85927c0a1402b956058999244ef03"},"schema_version":"1.0","source":{"id":"1911.01101","kind":"arxiv","version":2}},"canonical_sha256":"320e75540743c597b005572dc1a76af09fbf0c706a1e6bb1bdd6c10785a24825","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"320e75540743c597b005572dc1a76af09fbf0c706a1e6bb1bdd6c10785a24825","first_computed_at":"2026-07-05T00:17:19.491108Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:17:19.491108Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"cEareZ8Inj7JRGr/LbVVg7JGPCLd+Bpz+YbsIfXIhmd5L0dWjYC2yhQ5MLcrAA+hGgPqcbNdmjzWelfOqN/hBg==","signature_status":"signed_v1","signed_at":"2026-07-05T00:17:19.491506Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.01101","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:478a2a38793125b93cf832843e18c7861b810add8f0cd2bb3a82c5c1c89fc59f","sha256:c6923fc0547df6cff01bea58380ca68cb83d4c6485cf83b8db82b106a2ada78a"],"state_sha256":"511ee4c4a68526133bb39d1317b855b3f5446890629b664001391ff097937d1a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"12uEE32GHXbxDFRHYLjaSeRfKOveIZwtsSGCS3VtfiZzctH/1Sfcw6XIbrGkV1g0yf8HBW7YdauZnQXfCtZKDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T22:59:50.055242Z","bundle_sha256":"802b9f6ec06e8fbd903bfa8901e62f692b4d25d0e58149da04157b1b6c72577d"}}