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Fusion and Growth Behavior of Gold Nanoparticles Stabilized by Allylmercaptane |
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| Authors: | Naoto Shirahata Tetsu Yonezawa Yoshihiro Matsushita Yoshitake Masuda Kunihito Koumoto |
| Affiliation: | 1. Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chkusa-ku, Nagoya 464-8603, Japan National Institute of Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Japan;2. Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chkusa-ku, Nagoya 464-8603, Japan;3. Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chkusa-ku, Nagoya 464-8603, Japan National Institute of Advanced Industrial Science and Technology (AIST), 2266-98 Anagahora, Shimoshidami, Moriyama-ku, Nagoya 463-8560, Japan |
| Abstract: | Fusion and growth behavior of gold nanoparticles in a relatively low temperature range were studied using a transmission electron microscopy (TEM). Using allylmercaptane (AM: 2-propene-1-thiol, HS CH2 CHCH2) as a particle stabilizer, a colloidal suspension of AM-terminated gold nanoparticles was prepared with a two-phase system. TEM observation revealed that the adjacent nanoparticles formed a particulate neck to give fused nanoproducts even at lower than 65 °C. Such fusion behavior allowed a non-spherical growth of the adjacent nanoparticles. Interestingly, the nanoparticle fused to form a nanowire-type structure when the thermal radical reaction occurred between the terminal double carbon bond of the stabilizer and the hydrogen terminated surface of silicon wafer. |
| Keywords: | gold growth immobilization nanoparticle thiol |