Friction-directed self-assembly of Janus lithographic microgels into anisotropic 2D structures
Kodakkadan, Yadu Nath Vakkipurath and Maslen, Charlie and Cigler, Petr and Štěpánek, František and Rehor, Ivan (2021) Friction-directed self-assembly of Janus lithographic microgels into anisotropic 2D structures. Journal of Materials Chemistry B, 9 (23). pp. 4718-4725. ISSN 2050-750X (https://doi.org/10.1039/D1TB00572C)
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We present a method for creating ordered 2D structures with material anisotropy from self-assembling micro-sized hydrogel particles (microgels). Microgel platelets of polygonal shapes (hexagon, square, and rhombus), obtained by a continuous scalable lithographic process, are suspended in an aqueous environment and sediment on an inclined plane. As a consequence of gravitational pull, they slide over the plane. Each half of the microgel is composed of a different type of hydrogel [poly(N-isopropylacrylamide) (PNIPAM), and poly(ethylene glycol) diacrylate (PEGDA), respectively] which exhibit different frictional coefficients when sheared over a substrate. Hence the microgels self-orientate as they slide, and the side with the lower frictional coefficient positions in the direction of sliding. The self-oriented microgels concentrate at the bottom of the tilted plane. Here they form densely packed structures with translational as well as orientational order.
ORCID iDs
Kodakkadan, Yadu Nath Vakkipurath, Maslen, Charlie ORCID: https://orcid.org/0000-0003-2995-0918, Cigler, Petr, Štěpánek, František and Rehor, Ivan;-
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Item type: Article ID code: 89687 Dates: DateEvent21 June 2021Published12 May 2021Published Online11 May 2021AcceptedSubjects: Science > Chemistry
Science > Chemistry > Organic chemistryDepartment: Faculty of Science > Pure and Applied Chemistry Depositing user: Pure Administrator Date deposited: 21 Jun 2024 12:00 Last modified: 03 Oct 2024 10:20 URI: https://strathprints.strath.ac.uk/id/eprint/89687