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Spontaneous formation of gold nanostructures in aqueous microdroplets

Title
Spontaneous formation of gold nanostructures in aqueous microdroplets
Authors
Lee, Jae KyooSamanta, DevleenaNam, Hong GilZare, Richard N.
DGIST Authors
Nam, Hong Gil
Issue Date
2018-04
Citation
Nature Communications, 9(1)
Type
Article
Article Type
Article
Keywords
CHARGED MICRODROPLETSNANOPARTICLE CATALYSTSMETAL NANOPARTICLESNANOWIRE ARRAYSSHAPE CONTROLWATERGROWTHSIZEMICROREACTORSACCELERATION
ISSN
2041-1723
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 (∼7 nm in diameter) are produced within 60 μs at the rate of 0.24 nm μs-1. Compared to bulk solution, microdroplets enhance the size and the growth rate of AuNPs by factors of about 2.1 and 1.2 × 105, respectively. Later, we find that gold nanoparticles and nanowires (∼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. © 2018 The Author(s).
URI
http://hdl.handle.net/20.500.11750/6289
DOI
10.1038/s41467-018-04023-z
Publisher
NATURE PUBLISHING GROUP
Related Researcher
  • Author Nam, Hong Gil CBRG(Complex Biology Research Group)
  • Research Interests Plant Aging and Life History; Systems Biology; Complexbiology; Comparative Aging Research
Files:
Collection:
Department of New BiologyCBRG(Complex Biology Research Group)1. Journal Articles


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