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Periodicity-controlled two-dimensional crystalline colloidal arrays

Zhang, JT and Wang, L and Chao, X and Asher, SA (2011) Periodicity-controlled two-dimensional crystalline colloidal arrays. Langmuir, 27 (24). 15230 - 15235. ISSN 0743-7463

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We developed a convenient and fast approach to preparing close-packed two-dimensional (2-D) particle arrays on mercury surfaces. Addition of cosolvents, such as alcohols, to aqueous colloidal particle suspensions induces spreading and self-assembly of the particles into 2-D arrays on top of the mercury surface. We can fabricate large-area close-packed 2-D arrays (>70 cm 2) within 30 s. We attached these 2-D arrays to functional hydrogel films such that the 2-D array spacings were altered by the hydrogel volume response to the environment. We directly observed the hydrogel volume induced 2-D array spacing changes by using confocal laser scanning microscopy to monitor the spacings of fluorescent polystyrene particle 2-D arrays in response to changes in pH, solvent composition, temperature, etc. © 2011 American Chemical Society.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Zhang, JT
Wang, L
Chao, X
Asher, SAasher@pitt.eduASHER
Date: 20 December 2011
Date Type: Publication
Journal or Publication Title: Langmuir
Volume: 27
Number: 24
Page Range: 15230 - 15235
DOI or Unique Handle: 10.1021/la203363e
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Refereed: Yes
ISSN: 0743-7463
PubMed ID: 22007604
Date Deposited: 14 Feb 2013 21:13
Last Modified: 22 Jun 2021 13:56


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