{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:2KQD7KFMMCM4RGZ564PJHHZGII","short_pith_number":"pith:2KQD7KFM","canonical_record":{"source":{"id":"2108.00852","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-07-27T14:13:51Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"6cec4a5b6228a81e7dc4d46a5e3411146d2db55bd9e17071897b72af3fb249a8","abstract_canon_sha256":"bc911825ba2aa72116d1e80b36316882921b6c5cec23a6b3c7c32f310851e8e2"},"schema_version":"1.0"},"canonical_sha256":"d2a03fa8ac6099c89b3df71e939f26423e5dac3b2f22d4428d1174d8ce19ccef","source":{"kind":"arxiv","id":"2108.00852","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.00852","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"arxiv_version","alias_value":"2108.00852v1","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.00852","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"pith_short_12","alias_value":"2KQD7KFMMCM4","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"pith_short_16","alias_value":"2KQD7KFMMCM4RGZ5","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"pith_short_8","alias_value":"2KQD7KFM","created_at":"2026-07-05T03:02:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:2KQD7KFMMCM4RGZ564PJHHZGII","target":"record","payload":{"canonical_record":{"source":{"id":"2108.00852","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-07-27T14:13:51Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"6cec4a5b6228a81e7dc4d46a5e3411146d2db55bd9e17071897b72af3fb249a8","abstract_canon_sha256":"bc911825ba2aa72116d1e80b36316882921b6c5cec23a6b3c7c32f310851e8e2"},"schema_version":"1.0"},"canonical_sha256":"d2a03fa8ac6099c89b3df71e939f26423e5dac3b2f22d4428d1174d8ce19ccef","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:02:27.539398Z","signature_b64":"kghcviXsE/2HhwbpCU/gDOHswMr7Io2VF+orYev2oCIM7QqeViZy45PbVpyjFVxpi50Lkj4wZSDmTaCb9A8hBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2a03fa8ac6099c89b3df71e939f26423e5dac3b2f22d4428d1174d8ce19ccef","last_reissued_at":"2026-07-05T03:02:27.538972Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:02:27.538972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2108.00852","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":"2026-07-05T03:02:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ijz0IUsTI1+mhi9k6i/aen1O6EM7F++C3qAj1yCY133sgMRUupIWlF3tMVXPZ6TsJ7UPqRmuRHtXBY8RfUA+AQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T18:26:21.973306Z"},"content_sha256":"f9f6ed55df034c4abba3052bb4e5a2e373012e0b53f42b9b5eed590fdbd0d5eb","schema_version":"1.0","event_id":"sha256:f9f6ed55df034c4abba3052bb4e5a2e373012e0b53f42b9b5eed590fdbd0d5eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:2KQD7KFMMCM4RGZ564PJHHZGII","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"One-pot Liquid-Phase Synthesis of MoS$_2$-WS$_2$ van der Waals Heterostructures for Broadband Photodetection","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.app-ph","authors_text":"Samit Kumar Ray, Sanjeev Kumar Srivastava, Shaona Bose, Subhajit Jana, Subhrajit Mukherjee","submitted_at":"2021-07-27T14:13:51Z","abstract_excerpt":"Two dimensional (2D) van der Waals heterostructures (vdWHs) have their unique potential in facilitating the stacking of layers of different 2D materials for optoelectronic devices with superior characteristics at a reduced cost. However, the fabrication of large area all-2D heterostructures is still challenging towards realizing practical devices. In the present work, we have demonstrated a rapid yet simple, impurity free and highly efficient sonication-assisted chemical exfoliation approach to synthesize hybrid vdWHs based on 2D molybdenum disulphide (MoS$_2$) and tungsten disulphide (WS$_2$)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.00852","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/2108.00852/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":"2026-07-05T03:02:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6vMVPqrD7Vfr1Wkni+UqMT4dicl1o1ZJ6EHPq9w6fq1/vtnV/q6WSXS8yXN0CvkInZ9dHCEo2f1BcapVOtatAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-17T18:26:21.973704Z"},"content_sha256":"f09565073a37f3679be5448bd102f11090788b988d6edc6c83175bc68fb96aa1","schema_version":"1.0","event_id":"sha256:f09565073a37f3679be5448bd102f11090788b988d6edc6c83175bc68fb96aa1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2KQD7KFMMCM4RGZ564PJHHZGII/bundle.json","state_url":"https://pith.science/pith/2KQD7KFMMCM4RGZ564PJHHZGII/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2KQD7KFMMCM4RGZ564PJHHZGII/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":"2026-07-17T18:26:21Z","links":{"resolver":"https://pith.science/pith/2KQD7KFMMCM4RGZ564PJHHZGII","bundle":"https://pith.science/pith/2KQD7KFMMCM4RGZ564PJHHZGII/bundle.json","state":"https://pith.science/pith/2KQD7KFMMCM4RGZ564PJHHZGII/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2KQD7KFMMCM4RGZ564PJHHZGII/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:2KQD7KFMMCM4RGZ564PJHHZGII","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":"bc911825ba2aa72116d1e80b36316882921b6c5cec23a6b3c7c32f310851e8e2","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-07-27T14:13:51Z","title_canon_sha256":"6cec4a5b6228a81e7dc4d46a5e3411146d2db55bd9e17071897b72af3fb249a8"},"schema_version":"1.0","source":{"id":"2108.00852","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2108.00852","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"arxiv_version","alias_value":"2108.00852v1","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2108.00852","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"pith_short_12","alias_value":"2KQD7KFMMCM4","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"pith_short_16","alias_value":"2KQD7KFMMCM4RGZ5","created_at":"2026-07-05T03:02:27Z"},{"alias_kind":"pith_short_8","alias_value":"2KQD7KFM","created_at":"2026-07-05T03:02:27Z"}],"graph_snapshots":[{"event_id":"sha256:f09565073a37f3679be5448bd102f11090788b988d6edc6c83175bc68fb96aa1","target":"graph","created_at":"2026-07-05T03:02:27Z","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/2108.00852/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Two dimensional (2D) van der Waals heterostructures (vdWHs) have their unique potential in facilitating the stacking of layers of different 2D materials for optoelectronic devices with superior characteristics at a reduced cost. However, the fabrication of large area all-2D heterostructures is still challenging towards realizing practical devices. In the present work, we have demonstrated a rapid yet simple, impurity free and highly efficient sonication-assisted chemical exfoliation approach to synthesize hybrid vdWHs based on 2D molybdenum disulphide (MoS$_2$) and tungsten disulphide (WS$_2$)","authors_text":"Samit Kumar Ray, Sanjeev Kumar Srivastava, Shaona Bose, Subhajit Jana, Subhrajit Mukherjee","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-07-27T14:13:51Z","title":"One-pot Liquid-Phase Synthesis of MoS$_2$-WS$_2$ van der Waals Heterostructures for Broadband Photodetection"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2108.00852","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:f9f6ed55df034c4abba3052bb4e5a2e373012e0b53f42b9b5eed590fdbd0d5eb","target":"record","created_at":"2026-07-05T03:02:27Z","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":"bc911825ba2aa72116d1e80b36316882921b6c5cec23a6b3c7c32f310851e8e2","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.app-ph","submitted_at":"2021-07-27T14:13:51Z","title_canon_sha256":"6cec4a5b6228a81e7dc4d46a5e3411146d2db55bd9e17071897b72af3fb249a8"},"schema_version":"1.0","source":{"id":"2108.00852","kind":"arxiv","version":1}},"canonical_sha256":"d2a03fa8ac6099c89b3df71e939f26423e5dac3b2f22d4428d1174d8ce19ccef","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2a03fa8ac6099c89b3df71e939f26423e5dac3b2f22d4428d1174d8ce19ccef","first_computed_at":"2026-07-05T03:02:27.538972Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:02:27.538972Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"kghcviXsE/2HhwbpCU/gDOHswMr7Io2VF+orYev2oCIM7QqeViZy45PbVpyjFVxpi50Lkj4wZSDmTaCb9A8hBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T03:02:27.539398Z","signed_message":"canonical_sha256_bytes"},"source_id":"2108.00852","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f9f6ed55df034c4abba3052bb4e5a2e373012e0b53f42b9b5eed590fdbd0d5eb","sha256:f09565073a37f3679be5448bd102f11090788b988d6edc6c83175bc68fb96aa1"],"state_sha256":"96e5f5842b2cfe6cbd21e671adde57ac1ff2aa9c3f21f5a5103d1f31b3fac458"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZwhTfRi574p5PY94W4Ll9gfW6wxzw/QrApCJ2iLoSgHIBeqUTMLRzbfnCH9R5ima5fFHpq9ZLgm+oSYrF9k1Aw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-17T18:26:21.976295Z","bundle_sha256":"a2658e651014fdf96c6fb8c66b0cb1b9514ea684255eaaf9a7bd9746bbbd4adf"}}