TY - JOUR
T1 - Size control of Au NPs supported by pH operation
AU - Ichiji, Masumi
AU - Akiba, Hiroko
AU - Hirasawa, Izumi
N1 - Funding Information:
This research was supported by Waseda University (Grant no. 2015S-079) Grant for Special Research Projects.
Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Au NPs are expected to become useful functional particles, as particle gun used for plant gene transfer and also catalysts. We have studied PSD (particle size distribution) control of Au NPs by reduction crystallization. Previous study found out importance of seeds policy and also feeding profile. In this paper, effect of pH in the reduction crystallization was investigated to clarify the possibility of Au NPs PSD control by pH operation and also their growth process. Au NPs of size range 10–600 nm were obtained in single-jet system using ascorbic acid (AsA) as a reducing agent with adjusting pH of AsA. Au NPs are found to grow in the process of nucleation, agglomeration, agglomeration growth and surface growth. Au NPs tend to grow by agglomeration and become larger size in lower pH regions, and to grow only by surface growth and become smaller size in higher pH regions.
AB - Au NPs are expected to become useful functional particles, as particle gun used for plant gene transfer and also catalysts. We have studied PSD (particle size distribution) control of Au NPs by reduction crystallization. Previous study found out importance of seeds policy and also feeding profile. In this paper, effect of pH in the reduction crystallization was investigated to clarify the possibility of Au NPs PSD control by pH operation and also their growth process. Au NPs of size range 10–600 nm were obtained in single-jet system using ascorbic acid (AsA) as a reducing agent with adjusting pH of AsA. Au NPs are found to grow in the process of nucleation, agglomeration, agglomeration growth and surface growth. Au NPs tend to grow by agglomeration and become larger size in lower pH regions, and to grow only by surface growth and become smaller size in higher pH regions.
KW - A2. Growth from solutions
KW - A2. Industrial crystallization
KW - B1. Metals
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U2 - 10.1016/j.jcrysgro.2016.09.044
DO - 10.1016/j.jcrysgro.2016.09.044
M3 - Article
AN - SCOPUS:84998579520
SN - 0022-0248
VL - 469
SP - 168
EP - 171
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
ER -