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Friction-directed self-assembly of Janus lithographic microgels into anisotropic 2D structures

SYSNO ASEP	0543218
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Friction-directed self-assembly of Janus lithographic microgels into anisotropic 2D structures
Author(s)	Kodakkadan, Y. N. V. (CZ) Maslen, C. (CZ) Cígler, Petr (UOCHB-X)_{RID, ORCID} Štěpánek, F. (CZ) Řehoř, Ivan (UOCHB-X)_{RID, ORCID}
Source Title	Journal of Materials Chemistry B - ISSN 2050-750X Roč. 9, č. 23 (2021), s. 4718-4725
Number of pages	8 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	lubrication ; scales ; fabrication
OECD category	Polymer science
R&D Projects	Fellowship J. E. Purkyně GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	EF16_019/0000729 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Limited access
Institutional support	UOCHB-X - RVO:61388963
UT WOS	000656978900001
EID SCOPUS	85108119319
DOI	10.1039/d1tb00572c
Annotation	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.
Workplace	Institute of Organic Chemistry and Biochemistry
Contact	asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434
Year of Publishing	2022
Electronic address	https://doi.org/10.1039/D1TB00572C

Number of the records: 1