Multifunctional Moth-Eye TiO2/PDMS Pads with High Transmittance and UV Filtering

Segeun Jang; Seong Min Kang; Mansoo Choi

doi:10.1021/acsami.7b15502

Multifunctional Moth-Eye TiO₂/PDMS Pads with High Transmittance and UV Filtering

ACS Appl Mater Interfaces. 2017 Dec 20;9(50):44038-44044. doi: 10.1021/acsami.7b15502. Epub 2017 Dec 11.

Authors

Segeun Jang, Seong Min Kang¹, Mansoo Choi

Affiliation

¹ Department of Mechanical Engineering, Chungnam National University , Daejeon 34134, Republic of Korea.

PMID: 29188987
DOI: 10.1021/acsami.7b15502

Abstract

This work reports a facile fabrication method for constructing multifunctional moth-eye TiO₂/polydimethylsiloxane (PDMS) pads using soft nano-imprinting lithography and a gas-phase-deposited thin sacrificial layer. Mesoporous TiO₂ nanoparticles act as an effective UV filter, completely blocking high-energy UVB light and partially blocking UVA light and forming a robust TiO₂/PDMS composite pad by allowing the PDMS solution to easily fill the porous TiO₂ network. The paraboloid-shaped moth-eye nanostructures provided high transparency in the visible spectrum and also have self-cleaning effects because of nanoroughness on the surface. Furthermore, we successfully achieved a desired multiscale-patterned surface by partially curing select regions using TiO₂/PDMS pads with partial UVA ray blockers. The ability to fabricate multifunctional polymeric pads is advantageous for satisfying increasing demands for flexible and wearable electronics, displays, and solar cells.

Keywords: antireflection; moth-eye structure; multiscale synthesis; titanium dioxide; ultraviolet protection.