{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/125755"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/125755","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Quantitative control and measurement of nanoparticle dynamics in liquid-phase transmission electron microscopy","abstract":"Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01","abstract_html":"Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01","abstract_has_math":false,"creators":["Qian, Chang"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Materials Science & Engr","degree_department":null,"school":null,"contributors":["Chen, Qian","Zuo, Jian-Min","Schweizer, Kenneth S.","Sing, Charles E."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2024,"date_issued":"2024-07-01","date_published":"2024-07-01","updated_at":"2026-07-22T22:25:02Z","subjects":["Nanoparticle","Liquid-phase Tem","Self-assembly","4d-stem"],"languages":["en","eng"],"rights":["Copyright 2024 Chang Qian"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/2142/125755","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Chen, Qian","Zuo, Jian-Min","Schweizer, Kenneth S.","Sing, Charles E."]},{"key":"dc:creator","label":"Author","values":["Qian, Chang"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2024-07-01","2024-08"]},{"key":"dc:type","label":"Dc Type","values":["text","Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Materials Science & Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Nanoparticle","Liquid-phase Tem","Self-assembly","4d-stem"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2024 Chang Qian"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://hdl.handle.net/2142/125755"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01","The student, Chang Qian, accepted the attached license on 2024-06-18 at 14:51.","The student, Chang Qian, submitted this Dissertation for approval on 2024-06-18 at 15:02.","This Dissertation was approved for publication on 2024-07-01 at 10:30.","DSpace SAF Submission Ingestion Package generated from Vireo submission #20842 on 2025-02-04 at 21:25:00","Liquid-phase transmission electron microscopy (LP-TEM) has been widely used to study nanoparticle (NP) dynamics within liquid environments, facilitating investigation of particle diffusion dynamics during self-assembly process, and the morphological change of individual particles during etching and growth. However, the challenge of overcoming electron beam-induced effect and attaining more quantitative control and measurement remains a prominent obstacle in LP-TEM research. Throughout my Ph.D. studies, my research has been dedicated to advancing this frontier by integrating novel techniques and instruments. In the field of NP superlattice self-assembly, we envisioned the application of these structures in mechanical metamaterials. In Chapter 2, I pioneered the realization of nanoscale Maxwell lattice design through the self-assembly of gold nanocubes, leveraging LP-TEM to characterize the phonon vibration properties. This endeavor, supported by high-precision machine learning-based tracking algorithms, unveiled a quantitative agreement between experimental observation and theoretical predictions, holding the potential for inverse design of NP superlattice phononic properties. Furthermore, the soft phonons within the system are shown to be dictating the superlattice rearrangement dynamics and leads to intriguing size-dependent structural uniformity and dynamics in Chapter 3. In Chapter 4, we extended the design of the self-assembled building blocks to gold NPs with well-defined polymer patches. Here, LP-TEM studies of the patch-clasping bonding revealed the longitudinally robust and rotationally flexible nature, presenting promising avenues for metamaterials design. Shifting to NP growth dynamics, Chapter 5 introduced the integration between LP-TEM and novel four-dimensional scanning transmission electron microscopy (4D-STEM) in an in-situ manner, enabling concurrent characterization of real-space and reciprocal-space information during NP growth. This approach facilitated systematic exploration of growth inhibition effect, unveiling the nonclassical nucleation and phase transition during growth process. Finally, Chapter 6 summarizes the research findings and highlights future prospects for achieving more quantitative control and measurement capabilities in LP-TEM."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Quantitative control and measurement of nanoparticle dynamics in liquid-phase transmission electron microscopy"]}]}],"canonical_facts":{"dc:contributor":["Chen, Qian","Zuo, Jian-Min","Schweizer, Kenneth S.","Sing, Charles E."],"dc:creator":["Qian, Chang"],"dc:date":["2024-07-01","2024-08"],"dc:description":["Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01","The student, Chang Qian, accepted the attached license on 2024-06-18 at 14:51.","The student, Chang Qian, submitted this Dissertation for approval on 2024-06-18 at 15:02.","This Dissertation was approved for publication on 2024-07-01 at 10:30.","DSpace SAF Submission Ingestion Package generated from Vireo submission #20842 on 2025-02-04 at 21:25:00","Liquid-phase transmission electron microscopy (LP-TEM) has been widely used to study nanoparticle (NP) dynamics within liquid environments, facilitating investigation of particle diffusion dynamics during self-assembly process, and the morphological change of individual particles during etching and growth. However, the challenge of overcoming electron beam-induced effect and attaining more quantitative control and measurement remains a prominent obstacle in LP-TEM research. Throughout my Ph.D. studies, my research has been dedicated to advancing this frontier by integrating novel techniques and instruments. In the field of NP superlattice self-assembly, we envisioned the application of these structures in mechanical metamaterials. In Chapter 2, I pioneered the realization of nanoscale Maxwell lattice design through the self-assembly of gold nanocubes, leveraging LP-TEM to characterize the phonon vibration properties. This endeavor, supported by high-precision machine learning-based tracking algorithms, unveiled a quantitative agreement between experimental observation and theoretical predictions, holding the potential for inverse design of NP superlattice phononic properties. Furthermore, the soft phonons within the system are shown to be dictating the superlattice rearrangement dynamics and leads to intriguing size-dependent structural uniformity and dynamics in Chapter 3. In Chapter 4, we extended the design of the self-assembled building blocks to gold NPs with well-defined polymer patches. Here, LP-TEM studies of the patch-clasping bonding revealed the longitudinally robust and rotationally flexible nature, presenting promising avenues for metamaterials design. Shifting to NP growth dynamics, Chapter 5 introduced the integration between LP-TEM and novel four-dimensional scanning transmission electron microscopy (4D-STEM) in an in-situ manner, enabling concurrent characterization of real-space and reciprocal-space information during NP growth. This approach facilitated systematic exploration of growth inhibition effect, unveiling the nonclassical nucleation and phase transition during growth process. Finally, Chapter 6 summarizes the research findings and highlights future prospects for achieving more quantitative control and measurement capabilities in LP-TEM."],"dc:format":["application/pdf"],"dc:identifier":["https://hdl.handle.net/2142/125755"],"dc:language":["en","eng"],"dc:rights":["Copyright 2024 Chang Qian"],"dc:subject":["Nanoparticle","Liquid-phase Tem","Self-assembly","4d-stem"],"dc:title":["Quantitative control and measurement of nanoparticle dynamics in liquid-phase transmission electron microscopy"],"dc:type":["text","Thesis"],"thesis:degree_discipline":["Materials Science & Engr"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:02Z"}