Laser-Induced Formation and Disintegration of Gold Nanopeanuts and Nanowires
- Authors
- Park, Jung Shin; Yoon, Jun Hee; Kim, Hyung Jun; Huh, Young-Duk; Yoon, Sangwoon
- Issue Date
- Apr-2010
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- Nanopeanuts; Nanowires; Photoreaction; Gold nanoparticles
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.31, no.4, pp 819 - 824
- Pages
- 6
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 31
- Number
- 4
- Start Page
- 819
- End Page
- 824
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/54846
- DOI
- 10.5012/bkcs.2010.31.04.819
- ISSN
- 0253-2964
1229-5949
- Abstract
- We report the laser-induced formation of peanut-shaped gold nanoparticles (Au nanopeanuts) and gold nanowires (AuNWs), and their morphological properties. Pulsed laser irradiation of citrate-capped gold nanoparticles at 532 nm induces fragmentation, spherical growth, the formation of Au nanopeanuts, and the formation of AuNWs, sequentially High-resolution transmission electron microscopy images reveal that the Au nanopeanuts are formed by instantaneous fusion of spherical nanoparticles in random orientation by laser heating Furthermore, Au nanopeanuts are bridged in a linear direction to form AuNWs by an amorphous accumulation of gold atoms in the Junction. The laser-produced Au nanopeanuts and AuNWs slowly disintegrate, restoring the spherical shape of the original Au nanoparticles when the laser irradiation is stopped. The addition of citrate effectively prevents them from transforming back to the nanospheres.
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Collections - College of Natural Sciences > Department of Chemistry > 1. Journal Articles
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