Jia En Aw
Non-close-packed breath figures via ion-partitioning-mediated self-assembly
Aw, Jia En; Goh, Glen Tai Wei; Huang, Shengnan; Reithofer, Michael R.; Thong, Aaron Zhenghui; Chin, Jia Min
Authors
Glen Tai Wei Goh
Shengnan Huang
Michael R. Reithofer
Aaron Zhenghui Thong
Jia Min Chin
Abstract
We report a one-step method of forming non-close-packed (NCP) pore arrays of micro- and sub-micropores using chloroform-based solutions of polystyrene acidified with hydrogen bromide for breath figure (BF) patterning. As BF patterning takes place, water vapor condenses onto the polystyrene solution, forming water droplets on the solution surface. Concurrently, preferential ion partitioning of hydrogen bromide leads to positively charged water droplets, which experience interdroplet electrostatic repulsion. Self-organization of charged water droplets because of surface flow and subsequent evaporation of the droplet templates result in ordered BF arrays with pore separation/diameter (L/D) ratios of up to 16.5. Evidence from surface potential scans show proof for preferential ion partitioning of HBr. Radial distribution functions and Voronoi polygon analysis of pore arrays show that they possess a high degree of conformational order. Past fabrication methods of NCP structures typically require multi-step processes. In contrast, we have established a new route for facile self-assembly of previously inaccessible patterns, which comprises of only a single operational step.
Citation
Aw, J. E., Goh, G. T. W., Huang, S., Reithofer, M. R., Thong, A. Z., & Chin, J. M. (2015). Non-close-packed breath figures via ion-partitioning-mediated self-assembly. Langmuir : the ACS journal of surfaces and colloids, 31(24), 6688-6694. https://doi.org/10.1021/la504656j
Journal Article Type | Article |
---|---|
Acceptance Date | May 20, 2015 |
Online Publication Date | May 26, 2015 |
Publication Date | Jun 23, 2015 |
Deposit Date | Jun 30, 2015 |
Publicly Available Date | Jun 30, 2015 |
Journal | Langmuir |
Print ISSN | 0743-7463 |
Publisher | American Chemical Society |
Peer Reviewed | Peer Reviewed |
Volume | 31 |
Issue | 24 |
Pages | 6688-6694 |
DOI | https://doi.org/10.1021/la504656j |
Keywords | Breath figures, Non-close packed, Ion partitioning, Self-assembly, Pore arrays |
Public URL | https://hull-repository.worktribe.com/output/375895 |
Publisher URL | http://pubs.acs.org/doi/abs/10.1021/la504656j |
Additional Information | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see 10.1021/la504656j |
Contract Date | Jun 30, 2015 |
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