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Spontaneous formation of gold nanostructures in aqueous microdroplets

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Title
Spontaneous formation of gold nanostructures in aqueous microdroplets
Author(s)
Jae Kyoo Lee; Devleena Samanta; Hong Gil Nam; Richard N. Zare
Publication Date
2018-04
Journal
NATURE COMMUNICATIONS, v.9, no., pp.1562 -
Publisher
NATURE PUBLISHING GROUP
Abstract
The synthesis of gold nanostructures has received widespread attention owing to many important applications. We report the accelerated synthesis of gold nanoparticles (AuNPs), as well as the reducing-agent-free and template-free synthesis of gold nanoparticles and nanowires in aerosol microdroplets. At first, the AuNP synthesis are carried out by fusing two aqueous microdroplet streams containing chloroauric acid and sodium borohydride. The AuNPs (similar to 7 nm in diameter) are produced within 60 mu s at the rate of 0.24 nm mu s(-1). Compared to bulk solution, microdroplets enhance the size and the growth rate of AuNPs by factors of about 2.1 and 1.2 x 10(5), respectively. Later, we find that gold nanoparticles and nanowires (similar to 7 nm wide and > 2000 nm long) are also formed in microdroplets in the absence of any added reducing agent, template, or externally applied charge. Thus, water microdroplets not only accelerate the synthesis of AuNPs by orders of magnitude, but they also cause spontaneous formation of gold nanostructures © The Author(s) 2018
URI
http://pr.ibs.re.kr/handle/8788114/4595
DOI
10.1038/s41467-018-04023-z
ISSN
2041-1723
Appears in Collections:
Center for Plant Aging Research (식물 노화·수명 연구단) > Journal Papers (저널논문)
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