Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
Utsunomiya University Department of Applied Chemistry, Faculty of Engineering
National Institute of Advanced Industrial Science and Technology AIST Tsukuba Central 2
出版者
宇宙航空研究開発機構宇宙科学研究本部
出版者（英）
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)
雑誌名
宇宙利用シンポジウム 第23回 平成18年度
雑誌名(英)
Space Utilization Research: Proceedings of the Twenty-third Space Utilization Symposium
ページ
40 - 42
発行年
2007-03
抄録（英）
We have found the enhancement of the positive temperature dependency for surface tension of dilute aqueous solution of n-butanol by coexisting aqueous suspensions of Au and Ag nanoparticles (nanofluids). Au nanoparticles were prepared by reduction of HAuCl4 with sodium borohydride (NaBH4), while Ag nanoparticles were prepared by reduction of AgNO3 with Ethylene glycol heating with microwave energy. We measured the nanoparticle size distribution, surface tension and visible spectra at various temperatures. Nanofluids with several times larger positive surface-tension gradient with temperature can be developed by adding small amount of higher alcohols into prepared suspensions of the gold nanoparticles. It was found that the surface tension dependency was greatly affected by the size of the nanoparticles.
正の表面張力温度依存性を持つ金属ナノ粒子分散液(ナノ流体)の調製と特性評価
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