Self-Assembled Two-Dimensional Array of Gold Nanoparticles with Different Size for the Sensing Application

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概要

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• Self-assembled two-dimensional array of gold nanoparticles (GNPs) on the glass substrate was systematically investigated in terms of glass cleaning, K2CO3 addition, GNP size, and pH of gold colloids. An ambient-air plasma treatment produced a highly-activated glass surface with the lowest air/water contact angles and K2CO3 addition is very effective to preserve the optical properties of gold nanoparticles for a long time. Small GNPs (${\leq}40$ nm) was uniformly arrayed on the amine-functionalized glass through the optimization process of electrostatic attractions between positively-charged glass and negatively-charged gold nanoparticles. For large GNPs (${\geq}50$ nm) that resulted in discrete (or loosely-packed) array on the glass substrate, pH adjustment of gold colloids (from pH 11 to 9) produced more densely-packed array of GNPs with less void areas, probably due to the reduction of electrostatic repulsion forces between large gold nanoparticles.

• 2009-06-25

著者

• Park Sang-Eun

  Advanced Energy Materials Processing Laboratory, Korea Institute of Science and Technology, P. O. Box 131, Cheongryang, Seoul 130-650, Korea

• Li Wan-Chao

  Department of Chemical and Bio Engineering, Kyungwon University, San 65 Bokjeong-dong, Sujeong-ku, Seongnam, Gyeonggi-do 461-701, Korea

• Kim Jongsung

  Department of Chemical and Bio Engineering, Kyungwon University, San 65 Bokjeong-dong, Sujeong-ku, Seongnam, Gyeonggi-do 461-701, Korea

• Lee Sang-Wha

  Department of Chemical and Bio Engineering, Kyungwon University, San 65 Bokjeong-dong, Sujeong-ku, Seongnam, Gyeonggi-do 461-701, Korea

関連論文

• Self-Assembled Two-Dimensional Array of Gold Nanoparticles with Different Size for the Sensing Application
• Effect of Oxygen Concentration on Properties of Indium Zinc Oxide Thin Films for Flexible Dye-Sensitized Solar Cell

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