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Vertical spreading of two-dimensional crystalline colloidal arrays

Zhang, JT and Wang, L and Chao, X and Velankar, SS and Asher, SA (2013) Vertical spreading of two-dimensional crystalline colloidal arrays. Journal of Materials Chemistry C, 1 (38). 6099 - 6102. ISSN 2050-7534

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We report on a novel self-driven climbing of two-dimensional (2-D) ordered monolayer crystalline colloidal arrays (CCAs). This phenomenon can be used to rapidly and efficiently prepare large area, highly ordered 2-D array monolayer CCA films on various substrates. Large area 2-D polystyrene (PS) particle CCAs were fabricated on water surfaces by a needle tip flow technique. Introduction of a wet substrate through the 2-D particle monolayer array on the water surface causes the 2-D array to flow onto the wet substrate surface due to a surface spreading pressure. This method can quickly prepare ordered 2-D particle arrays on numerous wet substrates including flat/curved glass slides, inner walls of glass tubes, hydrogels, flexible polymer films, patterned surfaces, etc. By using responsive hydrogels as substrates, we can conveniently prepare 2-D photonic crystal sensors that can be used to visually determine analyte concentrations. For example, we prepared 580 nm PS 2-D arrays on poly(2-hydroxyethyl methacrylate) hydrogels to sense ethanol in water. © 2013 The Royal Society of Chemistry.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Zhang, JT
Wang, L
Chao, X
Velankar, SSvelankar@pitt.eduVELANKAR0000-0001-7541-1355
Asher, SAasher@pitt.eduASHER
Date: 14 October 2013
Date Type: Publication
Journal or Publication Title: Journal of Materials Chemistry C
Volume: 1
Number: 38
Page Range: 6099 - 6102
DOI or Unique Handle: 10.1039/c2tc00794k
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Refereed: Yes
ISSN: 2050-7534
Date Deposited: 22 Jul 2015 13:12
Last Modified: 13 Aug 2021 18:55


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