{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:V2PPG2UWIV6UV47WRROQSZJ6IF","short_pith_number":"pith:V2PPG2UW","canonical_record":{"source":{"id":"1506.06800","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-22T21:52:35Z","cross_cats_sorted":[],"title_canon_sha256":"a1df257d253c362c0c193aa23ffd415b261b13b689e2fd6e6eeb59a0401a831c","abstract_canon_sha256":"e97dee636a56a4b38a651dccb70e5d82e7e0a2c403bbeb6361a36534bd51a0d8"},"schema_version":"1.0"},"canonical_sha256":"ae9ef36a96457d4af3f68c5d09653e416feb8a199d420204eb931d79b6896f33","source":{"kind":"arxiv","id":"1506.06800","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.06800","created_at":"2026-05-18T01:37:03Z"},{"alias_kind":"arxiv_version","alias_value":"1506.06800v2","created_at":"2026-05-18T01:37:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.06800","created_at":"2026-05-18T01:37:03Z"},{"alias_kind":"pith_short_12","alias_value":"V2PPG2UWIV6U","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"V2PPG2UWIV6UV47W","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"V2PPG2UW","created_at":"2026-05-18T12:29:44Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:V2PPG2UWIV6UV47WRROQSZJ6IF","target":"record","payload":{"canonical_record":{"source":{"id":"1506.06800","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-22T21:52:35Z","cross_cats_sorted":[],"title_canon_sha256":"a1df257d253c362c0c193aa23ffd415b261b13b689e2fd6e6eeb59a0401a831c","abstract_canon_sha256":"e97dee636a56a4b38a651dccb70e5d82e7e0a2c403bbeb6361a36534bd51a0d8"},"schema_version":"1.0"},"canonical_sha256":"ae9ef36a96457d4af3f68c5d09653e416feb8a199d420204eb931d79b6896f33","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:37:03.514276Z","signature_b64":"1/hK5OwF34sKGWcwSUTnWfVamExgZWHkKOJjmhw6N0Una4zReEhCxC4nHRS7OJDmt5t6YBWCP5v1RTDfsgKeCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ae9ef36a96457d4af3f68c5d09653e416feb8a199d420204eb931d79b6896f33","last_reissued_at":"2026-05-18T01:37:03.513845Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:37:03.513845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.06800","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":"2026-05-18T01:37:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ruKOLvIC9BcDU9hp9JnOvxsXwuuwQ7LT3PjHCQlQoLz5YVsjwv8Aa2hPcW/Jl+cJWLLYSrI6IR1THSJ06tA2DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:38:10.612961Z"},"content_sha256":"181a1385b5d0540099e476e591a9589b841d1b0494b5e53ad1c7fca15e89c17e","schema_version":"1.0","event_id":"sha256:181a1385b5d0540099e476e591a9589b841d1b0494b5e53ad1c7fca15e89c17e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:V2PPG2UWIV6UV47WRROQSZJ6IF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mid-Infrared Plasmonic Biosensing with Graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.optics","authors_text":"Daniel Rodrigo, Davide Janner, Dordaneh Etezadi, F. Javier Garc\\'ia de Abajo, Hatice Altug, Odeta Limaj, Valerio Pruneri","submitted_at":"2015-06-22T21:52:35Z","abstract_excerpt":"Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. However, infrared light interacts poorly with nanometric size molecules. Here, we exploit the unique electro-optical properties of graphene to demonstrate a high-sensitivity tunable plasmonic biosensor for chemically-specific label-free detection of protein monolayers. The plasmon resonance of nanostructured graphene is dynamically tuned to selectively probe the protein at different frequencies and extract its complex refractive index. Additionally, the extreme s"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.06800","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":"2026-05-18T01:37:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YHoglcsptZqMd0OQN73CmaBero1oDFkuZAMQ8cZTrikeCW/XwQdv7lYNPEqi8O32mQtkFU91YwNLhWCjcl5sBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T18:38:10.613301Z"},"content_sha256":"b5e75422445fbaa5136c0109363aebda774e8af03962327c0a7f5bdcc49830db","schema_version":"1.0","event_id":"sha256:b5e75422445fbaa5136c0109363aebda774e8af03962327c0a7f5bdcc49830db"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V2PPG2UWIV6UV47WRROQSZJ6IF/bundle.json","state_url":"https://pith.science/pith/V2PPG2UWIV6UV47WRROQSZJ6IF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V2PPG2UWIV6UV47WRROQSZJ6IF/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":"2026-06-02T18:38:10Z","links":{"resolver":"https://pith.science/pith/V2PPG2UWIV6UV47WRROQSZJ6IF","bundle":"https://pith.science/pith/V2PPG2UWIV6UV47WRROQSZJ6IF/bundle.json","state":"https://pith.science/pith/V2PPG2UWIV6UV47WRROQSZJ6IF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V2PPG2UWIV6UV47WRROQSZJ6IF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:V2PPG2UWIV6UV47WRROQSZJ6IF","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":"e97dee636a56a4b38a651dccb70e5d82e7e0a2c403bbeb6361a36534bd51a0d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-22T21:52:35Z","title_canon_sha256":"a1df257d253c362c0c193aa23ffd415b261b13b689e2fd6e6eeb59a0401a831c"},"schema_version":"1.0","source":{"id":"1506.06800","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.06800","created_at":"2026-05-18T01:37:03Z"},{"alias_kind":"arxiv_version","alias_value":"1506.06800v2","created_at":"2026-05-18T01:37:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.06800","created_at":"2026-05-18T01:37:03Z"},{"alias_kind":"pith_short_12","alias_value":"V2PPG2UWIV6U","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_16","alias_value":"V2PPG2UWIV6UV47W","created_at":"2026-05-18T12:29:44Z"},{"alias_kind":"pith_short_8","alias_value":"V2PPG2UW","created_at":"2026-05-18T12:29:44Z"}],"graph_snapshots":[{"event_id":"sha256:b5e75422445fbaa5136c0109363aebda774e8af03962327c0a7f5bdcc49830db","target":"graph","created_at":"2026-05-18T01:37:03Z","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":"Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. However, infrared light interacts poorly with nanometric size molecules. Here, we exploit the unique electro-optical properties of graphene to demonstrate a high-sensitivity tunable plasmonic biosensor for chemically-specific label-free detection of protein monolayers. The plasmon resonance of nanostructured graphene is dynamically tuned to selectively probe the protein at different frequencies and extract its complex refractive index. Additionally, the extreme s","authors_text":"Daniel Rodrigo, Davide Janner, Dordaneh Etezadi, F. Javier Garc\\'ia de Abajo, Hatice Altug, Odeta Limaj, Valerio Pruneri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-22T21:52:35Z","title":"Mid-Infrared Plasmonic Biosensing with Graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.06800","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":"sha256:181a1385b5d0540099e476e591a9589b841d1b0494b5e53ad1c7fca15e89c17e","target":"record","created_at":"2026-05-18T01:37:03Z","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":"e97dee636a56a4b38a651dccb70e5d82e7e0a2c403bbeb6361a36534bd51a0d8","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2015-06-22T21:52:35Z","title_canon_sha256":"a1df257d253c362c0c193aa23ffd415b261b13b689e2fd6e6eeb59a0401a831c"},"schema_version":"1.0","source":{"id":"1506.06800","kind":"arxiv","version":2}},"canonical_sha256":"ae9ef36a96457d4af3f68c5d09653e416feb8a199d420204eb931d79b6896f33","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ae9ef36a96457d4af3f68c5d09653e416feb8a199d420204eb931d79b6896f33","first_computed_at":"2026-05-18T01:37:03.513845Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:37:03.513845Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1/hK5OwF34sKGWcwSUTnWfVamExgZWHkKOJjmhw6N0Una4zReEhCxC4nHRS7OJDmt5t6YBWCP5v1RTDfsgKeCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:37:03.514276Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.06800","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:181a1385b5d0540099e476e591a9589b841d1b0494b5e53ad1c7fca15e89c17e","sha256:b5e75422445fbaa5136c0109363aebda774e8af03962327c0a7f5bdcc49830db"],"state_sha256":"9c6c063ac32b7cf566a93dc6f0dc87775ee4c9d34f22a0cdbc029ce3e9201573"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LbdpIdzS69umlBLlAs4KDhwZhIm0DleDBo2xFilG+czcI6LmS0NzNexhIsqkUS9KKgnB9waBXVr1irQWNVljCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T18:38:10.615280Z","bundle_sha256":"92cc61d86f97d3efd6fdd7ecda5101c1efd04c279fb36c43a00d1f3c5e6971ea"}}