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However, the weak bonding between host and guest prevents atomic-resolution studies of their structure and chemistry using transmission electron microscopy (TEM). This problem is exacerbated in metal-organic frameworks (MOF), in which the host framework is easily damaged by the electron beam. Here, we use cryogenic-electron microscopy (cryo-EM) to simultaneously address these two challenges and resolve the atomic surface structure of zeolitic imidazolate framework (ZIF-8) and its interaction with guest CO2 m"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1904.04173","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-08T16:28:57Z","cross_cats_sorted":[],"title_canon_sha256":"8e2d18f061b05f905c4c0272e3b6d4773ec30493a9ed96d632a1dd434b3ddb62","abstract_canon_sha256":"b3777c2a0424d32ef311f2d39e60b01f4057ba7cd1f4d991861e67316062556d"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:06.865419Z","signature_b64":"1WC2jCgq15OHjjuKkXfCtuK+W7Va6ze6uPX4J7qrLOqwUl8LdbbDI2SJXqKhux/lTZNJ8UnVNjs3OJPZS5LLCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0b889262fd479624460a7e755093443e6c69fb30a4fa49f82298730cc5d61e45","last_reissued_at":"2026-05-17T23:49:06.864754Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:06.864754Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Cryo-EM structures of atomic surfaces and host-guest chemistry in metal-organic frameworks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Gong-Her Wu, Guangxu Chen, Hansen Wang, Hongxia Wang, Kecheng Wang, Rafael Vila, Robert Sinclair, Wah Chiu, Weijiang Zhou, William Huang, Yanbin Li, Yi Cui, Yuchi Tsao, Yuzhang Li","submitted_at":"2019-04-08T16:28:57Z","abstract_excerpt":"Host-guest interactions govern the chemistry of a broad range of functional materials. 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