Facile size-tunable fabrication of functional tin dioxide nanostructures by multiple size reduction lithography

Hyeong Ho Park, Wai Lung Law, Xin Zhang, Seon Yong Hwang, Sang Hyun Jung, Hyun Beom Shin, Ho Kwan Kang, Hyung Ho Park, Ross H. Hill, Chul Ki Ko

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A novel ultraviolet (UV)-assisted imprinting procedure that employs photosensitive tin(II) 2-ethylhexanoate is presented for the facile size-tunable fabrication of functional tin dioxide (SnO 2) nanostructures by varying annealing temperatures. These imprinted SnO 2 nanostructures were also used as new masters for size reduction lithography. SnO 2 lines down to 40 nm wide were obtained from a silicon master with 200 nm wide lines by simply performing size reduction lithography twice. This leads to 80 and 87.5% reduction in the width and height of imprinted lines, respectively. An imprinted pattern annealed at 400 °C demonstrated transmittance greater than 90% over the range of 350700 nm, which is high enough to make the pattern useful as a transparent SnO 2 mold. This demonstrated approach allows the accessibility to size-tunable molds, eliminating the need for conventional expensive imprinting masters with very fine structures, as well as functional SnO 2 nanostructures, potentially useful in applications where ordered surface nanostructures are required, such as photonic crystals, biological sensors, and model catalysts.

Original languageEnglish
Pages (from-to)2507-2514
Number of pages8
JournalACS Applied Materials and Interfaces
Volume4
Issue number5
DOIs
Publication statusPublished - 2012 May 23

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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