Notice of retraction
Vol. 32, No. 8(2), S&M2292

ISSN (print) 0914-4935
ISSN (online) 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Effect of Facile Base-solution Addition on Electrochemical Synthesis of Gold Nanoparticles

Pao-Hsun Huang, Po-Yen Lin, Po-Chen Lin, Shui-Yang Lien, Po-Wen Sze, Chih-Chieh Kang, Na-Fu Wang, and Chien-Jung Huang

(Received March 13, 2020; Accepted September 23, 2020)

Keywords: electrochemical synthesis, gold nanoparticles, sodium hydroxide, condensation

In this research, the gold nanoparticles (GNPs) obtained by sono-electrochemical fabrication are prepared via the addition of a base solution, sodium hydroxide (NaOH), into the growth solution. The effect of the amount of NaOH on the growth of GNPs is investigated. The growth solution has been improved to blend collocated acetone, hexadecyltrimethylammonium (CTAB), and NaOH for the evenness control of GNPs. The excessive condensation reaction resulting from acetone is inhibited by adding 70 μl of NaOH to the growth solution to build a micelle template. Uniform and spherical GNPs with an average diameter of 25.5 nm and an absorption peak at 527 nm were achieved because the interaction between free electrons and the hydroxyl groups loosened the micelle template. The cluster agglomeration and size distribution of GNPs were also improved according to TEM observation. The results of this study can be applied to sensors to improve their sensitivity by adding more nanoparticles or enhancing the sensor signal.

Corresponding author: Chien-Jung Huang

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