Polycarbonate nanoparticles spray coated on silicon substrate using micro-electromechanical-systems-based high-frequency ultrasonic nozzle
Resource
APPLIED ACOUSTICS, 72(12), 949-952
Journal
Applied Acoustics
Pages
949-952
Date Issued
2011
Date
2011
Author(s)
Song, Yu Lin
Cheng, Chih Hsiao
Chang, Luh-Maan
Lee, Chia-Fone
Chou, Yuan Fang
Abstract
Mono-disperse polycarbonate (PC) nanoparticles 20 nm in diameter was spray coated on silicon substrate using a novel high-frequency ultrasonic nozzle. Specifically, Bisphenol-A polycarbonate with a molecular weight (Mw) of approximately 6.4 × 104 g/mol was first dissolved in pyridine. The resulting solution was sprayed into surfactant-containing de-ionized (DI) water using a 300 kHz silicon-based multiple-Fourier horn nozzle (MFHN). As pyridine was extracted into the water, PC nanoparticles formed but remained dispersed. This suspension of PC nanoparticles was then sprayed onto a silicon substrate using a 500 kHz 3-Fourier horn nozzle. Scanning electron microscopy (SEM) of the dried substrate revealed that PC nanoparticles were spread uniformly with no aggregation. © 2011 Published by Elsevier Ltd. All rights reserved.
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Type
journal article
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