{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:MMHMNRUEZ472GS4V4FMGJXXIQZ","short_pith_number":"pith:MMHMNRUE","canonical_record":{"source":{"id":"0910.2596","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-14T12:07:56Z","cross_cats_sorted":[],"title_canon_sha256":"a32c4b1dd070b4e6f717c9d078eda45e66b09e801e3799d89ad5444820f0f6b8","abstract_canon_sha256":"a2a82702ff3b4624bd5d1a3be1f4ef2ecf58d43b22fca3ba3a831569d0c493cd"},"schema_version":"1.0"},"canonical_sha256":"630ec6c684cf3fa34b95e15864dee88640328db78e2ffe3f64305cec2cb5dc0f","source":{"kind":"arxiv","id":"0910.2596","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.2596","created_at":"2026-05-18T02:11:23Z"},{"alias_kind":"arxiv_version","alias_value":"0910.2596v1","created_at":"2026-05-18T02:11:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.2596","created_at":"2026-05-18T02:11:23Z"},{"alias_kind":"pith_short_12","alias_value":"MMHMNRUEZ472","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MMHMNRUEZ472GS4V","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MMHMNRUE","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:MMHMNRUEZ472GS4V4FMGJXXIQZ","target":"record","payload":{"canonical_record":{"source":{"id":"0910.2596","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-14T12:07:56Z","cross_cats_sorted":[],"title_canon_sha256":"a32c4b1dd070b4e6f717c9d078eda45e66b09e801e3799d89ad5444820f0f6b8","abstract_canon_sha256":"a2a82702ff3b4624bd5d1a3be1f4ef2ecf58d43b22fca3ba3a831569d0c493cd"},"schema_version":"1.0"},"canonical_sha256":"630ec6c684cf3fa34b95e15864dee88640328db78e2ffe3f64305cec2cb5dc0f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:23.746180Z","signature_b64":"DyXYWsP3Kkf97pJ89Hm1G4V5ki+8iPITKAGqlpuZZd+zZzHMP0v/RTAmqPbilc9RQ84/xvtYv2TOzX4QLjroDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"630ec6c684cf3fa34b95e15864dee88640328db78e2ffe3f64305cec2cb5dc0f","last_reissued_at":"2026-05-18T02:11:23.745454Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:23.745454Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.2596","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":"2026-05-18T02:11:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EDbbnFV5lIwzNkTZsU6WudjdMoymwK2T3ikqgNGwP7S0hp5ePcL2Hxf3vF0nMQR7lfo8AiBa+tauEpWhTQaeAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:13:39.485630Z"},"content_sha256":"bc2b96529ff352843b365e1fffce8f793df46d78964e0f5d1f07b1cf272afdb0","schema_version":"1.0","event_id":"sha256:bc2b96529ff352843b365e1fffce8f793df46d78964e0f5d1f07b1cf272afdb0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:MMHMNRUEZ472GS4V4FMGJXXIQZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Graphene on a hydrophobic substrate: Doping reduction and hysteresis suppression under ambient conditions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Benjamin Krauss, Germany), Hagen Klauk, Jurgen H. Smet (Max Planck Institute for Solid State Research, Klaus v. Klitzing, Myrsini Lafkioti, Stuttgart, Timm Lohmann, Ute Zschieschang","submitted_at":"2009-10-14T12:07:56Z","abstract_excerpt":"The intrinsic doping level of graphene prepared by mechanical exfoliation and standard lithography procedures on thermally oxidized silicon varies significantly and seems to depend strongly on processing details and the substrate morphology. Moreover, transport properties of such graphene devices suffer from hysteretic behavior under ambient conditions. The hysteresis presumably originates from dipolar adsorbates on the substrate or graphene surface. Here, we demonstrate that it is possible to reliably obtain low intrinsic doping levels and to strongly suppress hysteretic behavior even in ambi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.2596","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":"2026-05-18T02:11:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"dfHZE0FxkZRHKmq21qYZOmOijdDeAv51eZpkcLmsawf6//Gxzg0+SiJItyzdjz9rbmtFgRjD/6HC2Lim2BRxAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T23:13:39.486275Z"},"content_sha256":"04903efa30edcf1b8af749ccbfbd467a30f6e9df47df303b5cb9bd4b0176783a","schema_version":"1.0","event_id":"sha256:04903efa30edcf1b8af749ccbfbd467a30f6e9df47df303b5cb9bd4b0176783a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MMHMNRUEZ472GS4V4FMGJXXIQZ/bundle.json","state_url":"https://pith.science/pith/MMHMNRUEZ472GS4V4FMGJXXIQZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MMHMNRUEZ472GS4V4FMGJXXIQZ/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":"2026-05-25T23:13:39Z","links":{"resolver":"https://pith.science/pith/MMHMNRUEZ472GS4V4FMGJXXIQZ","bundle":"https://pith.science/pith/MMHMNRUEZ472GS4V4FMGJXXIQZ/bundle.json","state":"https://pith.science/pith/MMHMNRUEZ472GS4V4FMGJXXIQZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MMHMNRUEZ472GS4V4FMGJXXIQZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:MMHMNRUEZ472GS4V4FMGJXXIQZ","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":"a2a82702ff3b4624bd5d1a3be1f4ef2ecf58d43b22fca3ba3a831569d0c493cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-14T12:07:56Z","title_canon_sha256":"a32c4b1dd070b4e6f717c9d078eda45e66b09e801e3799d89ad5444820f0f6b8"},"schema_version":"1.0","source":{"id":"0910.2596","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.2596","created_at":"2026-05-18T02:11:23Z"},{"alias_kind":"arxiv_version","alias_value":"0910.2596v1","created_at":"2026-05-18T02:11:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.2596","created_at":"2026-05-18T02:11:23Z"},{"alias_kind":"pith_short_12","alias_value":"MMHMNRUEZ472","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"MMHMNRUEZ472GS4V","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"MMHMNRUE","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:04903efa30edcf1b8af749ccbfbd467a30f6e9df47df303b5cb9bd4b0176783a","target":"graph","created_at":"2026-05-18T02:11:23Z","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":"The intrinsic doping level of graphene prepared by mechanical exfoliation and standard lithography procedures on thermally oxidized silicon varies significantly and seems to depend strongly on processing details and the substrate morphology. Moreover, transport properties of such graphene devices suffer from hysteretic behavior under ambient conditions. The hysteresis presumably originates from dipolar adsorbates on the substrate or graphene surface. Here, we demonstrate that it is possible to reliably obtain low intrinsic doping levels and to strongly suppress hysteretic behavior even in ambi","authors_text":"Benjamin Krauss, Germany), Hagen Klauk, Jurgen H. Smet (Max Planck Institute for Solid State Research, Klaus v. Klitzing, Myrsini Lafkioti, Stuttgart, Timm Lohmann, Ute Zschieschang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-14T12:07:56Z","title":"Graphene on a hydrophobic substrate: Doping reduction and hysteresis suppression under ambient conditions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.2596","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:bc2b96529ff352843b365e1fffce8f793df46d78964e0f5d1f07b1cf272afdb0","target":"record","created_at":"2026-05-18T02:11:23Z","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":"a2a82702ff3b4624bd5d1a3be1f4ef2ecf58d43b22fca3ba3a831569d0c493cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2009-10-14T12:07:56Z","title_canon_sha256":"a32c4b1dd070b4e6f717c9d078eda45e66b09e801e3799d89ad5444820f0f6b8"},"schema_version":"1.0","source":{"id":"0910.2596","kind":"arxiv","version":1}},"canonical_sha256":"630ec6c684cf3fa34b95e15864dee88640328db78e2ffe3f64305cec2cb5dc0f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"630ec6c684cf3fa34b95e15864dee88640328db78e2ffe3f64305cec2cb5dc0f","first_computed_at":"2026-05-18T02:11:23.745454Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:23.745454Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DyXYWsP3Kkf97pJ89Hm1G4V5ki+8iPITKAGqlpuZZd+zZzHMP0v/RTAmqPbilc9RQ84/xvtYv2TOzX4QLjroDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:23.746180Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.2596","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bc2b96529ff352843b365e1fffce8f793df46d78964e0f5d1f07b1cf272afdb0","sha256:04903efa30edcf1b8af749ccbfbd467a30f6e9df47df303b5cb9bd4b0176783a"],"state_sha256":"b1acadec651448d4f4284bf72cc22fd61936d94038f327d096ab927e1e7e633e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2f8HWtw1CkhaXlU+qbxAl5sWTHZbuJxq61Rygtfjj5VUKbPY1E+1qQuh+YWtycyKhc+4fx8dPUvV5MUWQToYDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T23:13:39.488728Z","bundle_sha256":"bf0e21f169e737e79ee7344dfcd3fcde0bd0f0f5b0528c95d7198066e8143ddd"}}