Diameter-Engineered SnO2 Nanowires over Contact-Printed Gold Nanodots Using Size-Controlled Carbon Nanopost Array Stamps

作者：Lee Sang Ho; Jo Gunho; Park Woojin; Lee Seungkyo; Kim Youn Su; Cho Beong Ki; Lee Takhee^*; Kim Won Bae

来源：ACS Nano, 2010, 4(4): 1829-1836.

DOI：10.1021/nn100197u

• carbon nanopost stamps
• contact-printing of catalysts
• liquid ink
• diameter control
• SnO2 nanowires
• alumina templates
• field effect transistors

A novel and effective methodology to control the diameter; of semiconductor nanowires is reported through a versatile contact-printing method for obtaining size-controlled nanocatalysts by size-tunable carbon-based nanometer stamps. Vertically aligned carbon nanopost array;, derived from nanoporous alumina templates, are used as the nanoscale stamps for printing of catalyst nanoparticles. The diameter of the carbon nanopost can be engineered by adjusting the pore dimension of the temphtes. Over the contact-printed Au nanodots in a uniform size distribution, semiconductor SnO2 nanowires are grown via a vapor-liquid-solid growth mechanism. Consequently, a direct dimension correspondence is achieved between the carbon nanopost stamp, the printed Au catalyst, and the finally obtained SnO2 nanowires. A model example of the diameter-dependent electrical properties of the semiconductor nanowires is successfully demonstrated in this work by applying three diameter-controlled SnO2 nanowires to nanowire field effect transistors.

• 出版日期2010-4