{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:4CB7DB7VIRJCR6UTLCQE2VWXZR","short_pith_number":"pith:4CB7DB7V","canonical_record":{"source":{"id":"0801.3318","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-22T07:55:22Z","cross_cats_sorted":[],"title_canon_sha256":"fc430298153d9c4fa5255d43d5922836886033cc26ab257a5bdd9232a396eee7","abstract_canon_sha256":"b068eef97dd1b0766fbdf2e8577891884e9cf195b1c75d00ba07ade14a633017"},"schema_version":"1.0"},"canonical_sha256":"e083f187f5445228fa9358a04d56d7cc646306d950b847e99d9ea80fa410e10b","source":{"kind":"arxiv","id":"0801.3318","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.3318","created_at":"2026-05-18T04:03:44Z"},{"alias_kind":"arxiv_version","alias_value":"0801.3318v1","created_at":"2026-05-18T04:03:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.3318","created_at":"2026-05-18T04:03:44Z"},{"alias_kind":"pith_short_12","alias_value":"4CB7DB7VIRJC","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"4CB7DB7VIRJCR6UT","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"4CB7DB7V","created_at":"2026-05-18T12:25:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:4CB7DB7VIRJCR6UTLCQE2VWXZR","target":"record","payload":{"canonical_record":{"source":{"id":"0801.3318","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-22T07:55:22Z","cross_cats_sorted":[],"title_canon_sha256":"fc430298153d9c4fa5255d43d5922836886033cc26ab257a5bdd9232a396eee7","abstract_canon_sha256":"b068eef97dd1b0766fbdf2e8577891884e9cf195b1c75d00ba07ade14a633017"},"schema_version":"1.0"},"canonical_sha256":"e083f187f5445228fa9358a04d56d7cc646306d950b847e99d9ea80fa410e10b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:03:44.132303Z","signature_b64":"USh/Kh18mFkCa1gnHWtuGY1NSNMI0zb8+WXsEjyv0nxMephxamE1Ge8WHySIU3bK/UBzLlTx3Jpcz1CySFtgDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e083f187f5445228fa9358a04d56d7cc646306d950b847e99d9ea80fa410e10b","last_reissued_at":"2026-05-18T04:03:44.131579Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:03:44.131579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0801.3318","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":"2026-05-18T04:03:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tiDRuDdP3MULTi77vqbX4/WLcQkR/G/yuyVoLrBZafimdaVubfn0uyfHDJcMp4S5b43nAe5vir2K28+F3MDnBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T10:32:20.315041Z"},"content_sha256":"ac9f6f1b5bf3b54c4755bf9324934590b4652e10ffefed9e34994392ee7f9557","schema_version":"1.0","event_id":"sha256:ac9f6f1b5bf3b54c4755bf9324934590b4652e10ffefed9e34994392ee7f9557"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:4CB7DB7VIRJCR6UTLCQE2VWXZR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Interfacial Instability of Charged End-Group Polymer Brushes","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.soft","authors_text":"David Andelman, Jean-Fran\\c{c}ois Joanny, Yoav Tsori","submitted_at":"2008-01-22T07:55:22Z","abstract_excerpt":"We consider a polymer brush grafted to a surface (acting as an electrode) and bearing a charged group at its free end. Using a second distant electrode, the brush is subject to a constant electric field. Based on a coarse-grained continuum model, we calculate the average brush height and find that the brush can stretch or compress depending on the applied field and charge end-group. We further look at an undulation mode of the flat polymer brush and find that the electrostatic energy scales linearly with the undulation wavenumber, $q$. Competition with surface tension, scaling as $q^2$, tends "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.3318","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":"2026-05-18T04:03:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ik4DLQNwMVa4hbkPcTsXSl4LAjnzLJ9GRLs3+Pu8KgBb1PX+I3CnWKJtJD2x5iOx1IlShl/CqBCRSJh/KW1bCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-11T10:32:20.315411Z"},"content_sha256":"58a165a9967536d4a0f83acee3239af77623f4de13473d4584051c7fc9ae1d52","schema_version":"1.0","event_id":"sha256:58a165a9967536d4a0f83acee3239af77623f4de13473d4584051c7fc9ae1d52"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4CB7DB7VIRJCR6UTLCQE2VWXZR/bundle.json","state_url":"https://pith.science/pith/4CB7DB7VIRJCR6UTLCQE2VWXZR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4CB7DB7VIRJCR6UTLCQE2VWXZR/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":"2026-06-11T10:32:20Z","links":{"resolver":"https://pith.science/pith/4CB7DB7VIRJCR6UTLCQE2VWXZR","bundle":"https://pith.science/pith/4CB7DB7VIRJCR6UTLCQE2VWXZR/bundle.json","state":"https://pith.science/pith/4CB7DB7VIRJCR6UTLCQE2VWXZR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4CB7DB7VIRJCR6UTLCQE2VWXZR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:4CB7DB7VIRJCR6UTLCQE2VWXZR","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":"b068eef97dd1b0766fbdf2e8577891884e9cf195b1c75d00ba07ade14a633017","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-22T07:55:22Z","title_canon_sha256":"fc430298153d9c4fa5255d43d5922836886033cc26ab257a5bdd9232a396eee7"},"schema_version":"1.0","source":{"id":"0801.3318","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0801.3318","created_at":"2026-05-18T04:03:44Z"},{"alias_kind":"arxiv_version","alias_value":"0801.3318v1","created_at":"2026-05-18T04:03:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0801.3318","created_at":"2026-05-18T04:03:44Z"},{"alias_kind":"pith_short_12","alias_value":"4CB7DB7VIRJC","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_16","alias_value":"4CB7DB7VIRJCR6UT","created_at":"2026-05-18T12:25:56Z"},{"alias_kind":"pith_short_8","alias_value":"4CB7DB7V","created_at":"2026-05-18T12:25:56Z"}],"graph_snapshots":[{"event_id":"sha256:58a165a9967536d4a0f83acee3239af77623f4de13473d4584051c7fc9ae1d52","target":"graph","created_at":"2026-05-18T04:03:44Z","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 consider a polymer brush grafted to a surface (acting as an electrode) and bearing a charged group at its free end. Using a second distant electrode, the brush is subject to a constant electric field. Based on a coarse-grained continuum model, we calculate the average brush height and find that the brush can stretch or compress depending on the applied field and charge end-group. We further look at an undulation mode of the flat polymer brush and find that the electrostatic energy scales linearly with the undulation wavenumber, $q$. Competition with surface tension, scaling as $q^2$, tends ","authors_text":"David Andelman, Jean-Fran\\c{c}ois Joanny, Yoav Tsori","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-22T07:55:22Z","title":"Interfacial Instability of Charged End-Group Polymer Brushes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0801.3318","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:ac9f6f1b5bf3b54c4755bf9324934590b4652e10ffefed9e34994392ee7f9557","target":"record","created_at":"2026-05-18T04:03:44Z","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":"b068eef97dd1b0766fbdf2e8577891884e9cf195b1c75d00ba07ade14a633017","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.soft","submitted_at":"2008-01-22T07:55:22Z","title_canon_sha256":"fc430298153d9c4fa5255d43d5922836886033cc26ab257a5bdd9232a396eee7"},"schema_version":"1.0","source":{"id":"0801.3318","kind":"arxiv","version":1}},"canonical_sha256":"e083f187f5445228fa9358a04d56d7cc646306d950b847e99d9ea80fa410e10b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e083f187f5445228fa9358a04d56d7cc646306d950b847e99d9ea80fa410e10b","first_computed_at":"2026-05-18T04:03:44.131579Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:03:44.131579Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"USh/Kh18mFkCa1gnHWtuGY1NSNMI0zb8+WXsEjyv0nxMephxamE1Ge8WHySIU3bK/UBzLlTx3Jpcz1CySFtgDA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:03:44.132303Z","signed_message":"canonical_sha256_bytes"},"source_id":"0801.3318","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ac9f6f1b5bf3b54c4755bf9324934590b4652e10ffefed9e34994392ee7f9557","sha256:58a165a9967536d4a0f83acee3239af77623f4de13473d4584051c7fc9ae1d52"],"state_sha256":"eddfc25363d7becd7b35a3903850aeb62c7f398e826b5bbe35caba3d90483e7c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SiLxTgyT//znH2PK8SCgIj670codAN2QonlKoRsQu5JcGMaGWMw0IXmMM4PWhTyJK6JwqLCKK36sOisey2gMBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-11T10:32:20.317295Z","bundle_sha256":"13e5627932618da7eaa9930c4212a40e00a35d9b2a3def07fe7f9ecfec25c9b9"}}