Journal
ULTRASONICS SONOCHEMISTRY
Volume 19, Issue 3, Pages 621-626Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2011.08.012
Keywords
Sonication; Gold nanoparticles; Layer-by-layer deposition; Polyimide; Ethanedithiol (EDT)
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Funding
- GIST
- National Research Foundation of Korea (NRF)
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Sonication-assisted layer-by-layer (LBL) deposition of gold nanoparticles (GNPs) was carried out in an attempt to prepare highly conductive gold patterns on polyimide substrates. First, sonication time was optimized with GNPs (12.8 nm) whose size was large enough to be analyzed by FE-SEM in order to evaluate the surface coverage. Next, multilayer formation (4, 8 and 12 layer) was confirmed using ethanedithiol (EDT) as linker molecules under optimized conditions by measuring their UV absorption, near-IR (NIR) transmittance, thickness, and electrical conductivity. Finally, 20-layer films using small GNPs (2.5 nm) were prepared with or without patterning, followed by sintering at 150 degrees C for 1 h, which provided clean gold patterns with high electrical conductivity (2.5 x 10(5) Omega(-1) cm(-1)). (C) 2011 Elsevier B.V. All rights reserved.
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