Hwang, W Ham, MH Sohn, BH Huh, J Kang, YS Jeong, W Myoung, JM Park, C 2024-01-21T04:04:58Z 2024-01-21T04:04:58Z 2021-09-02 2005-12 0957-4484 https://pubs.kist.re.kr/handle/201004/135957 This paper describes a new and facile method, 'solvent capillary contact printing (SCCP)', that fabricates micro-patterned hydrophilic/hydrophobic surface caused by the selective manipulation of nanometre-scale block copolymer micelles. The method is based on using capillary injection and evaporation of a solvent, which is preferential to a core block of micelles, through poly(dimethylsiloxane) (PDMS) microchannels placed on a pre-formed block copolymer micelle monolayer. We produced well-defined surface micropatterns where a nanostructure consisting of core-opened micelles gave rise to hydrophilic surface property in the regions in contact with solvent while one consisting of hemispherical micelles remained hydrophobic in the regions contacted by the PDMS mould. Our method allows repetitive micropatterning; a surface micropattern previously formed is simply erased by exposure of preferential solvent vapour due to reversible structure modification of micelles. Furthermore, SCCP with various metal salts., precursors of metal nanoparticles, enables us to fabricate micropatterned arrays of well-separated metal nanoparticles which can be used as a catalyst for synthesizing nanowires. The micropatterned GaN nanowires are demonstrated, fabricated by SCCP. English IOP PUBLISHING LTD TEMPLATES SURFACE Micropatterning of block copolymer micelle thin films using solvent capillary contact printing Article 10.1088/0957-4484/16/12/028 1 NANOTECHNOLOGY, v.16, no.12, pp.2897 - 2902 NANOTECHNOLOGY 16 12 2897 2902 scie scopus 000234304000036 2-s2.0-27944455150 Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Science & Technology - Other Topics Materials Science Physics Article TEMPLATES SURFACE micropatterning micelle thin films block copolymer solvent capillary