title: Scalable nanopillar arrays with layer-by-layer patterned overt and covert images.
abstract: Transferring flexible and scalable nano-pillar arrays on a variety of unconventional substrates, including fabric, paper, and metals, is achieved by a single-step replication process using UV-curable polymers. Local alteration of the contact angle on the nanopillar arrays by LBL films creates selectively hidden images. They can be revealed by the breath and used as an innovative anti-counterfeit technology.
authors.affiliation: Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan, 48109, USA; Department of Nano Bio Research, National Nanofab Center (NNFC), Daejeon, 305-806, Republic of Korea.
authors.forename: Kyoung G
authors.initials: KG
authors.lastname: Lee
authors.forename: Bong Gill
authors.initials: BG
authors.lastname: Choi
authors.forename: Byeong Il
authors.initials: BI
authors.lastname: Kim
authors.forename: Terry
authors.initials: T
authors.lastname: Shyu
authors.forename: Myung Seok
authors.initials: MS
authors.lastname: Oh
authors.forename: Sung Gap
authors.initials: SG
authors.lastname: Im
authors.forename: Sung-Jin
authors.initials: SJ
authors.lastname: Chang
authors.forename: Tae Jae
authors.initials: TJ
authors.lastname: Lee
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Kotov
authors.forename: Seok Jae
authors.initials: SJ
authors.lastname: Lee
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction; D011140:Polyurethanes / Q000737:chemistry; D012825:Silicon / Q000737:chemistry; D013499:Surface Properties
chemical_list: D004129:Dimethylpolysiloxanes; D011140:Polyurethanes; C013830:baysilon; D012825:Silicon
keywords: layer-by-layer assembly; nanomaterials; nanopatterning; nanopillars; nanostructures; scalable nanotechnology; wettability