A Si nanoparticle surface was etched in an aqueous HE solution under monochromatic light irradiation in the infrared-to-visible region. The average size of the nanoparticles was controlled by changing the photon energy of the irradiating light. Af...
Seiichi Sato   Ayumi Matsuda   Tatsuya Sugimoto   Keisaku Kimura   
JAPANESE JOURNAL OF APPLIED PHYSICS 50(1) 1-1 2011年1月 [査読有り]
Micrometer-sized three-dimensional superlattices were fabricated by assembling Au nanocrystals modified with mercaptosuccinic acid in aqueous suspensions. Each superlattice formed a single crystal arrangement with a hexagonal close-packed structur...
Seiichi Sato   Takeyasu Ito   Keisaku Kimura   
JAPANESE JOURNAL OF APPLIED PHYSICS 49(6) 1-6 2010年 [査読有り]
Micrometer-sized three-dimensional superlattices with different lattice constants were fabricated by assembling Au nanocrystals modified with mercaptosuccinic acid in aqueous suspensions. The refractive index of the superlattices was varied betwee...
Keisaku Kimura   Nobuyuki Sugimoto   Seiichi Sato   Hiroshi Yao   Yuichi Negishi   Tatsuya Tsukuda   
JOURNAL OF PHYSICAL CHEMISTRY C 113(32) 14076-14082 2009年8月 [査読有り]
Polyacrylamide gel electrophoresis (PAGE) is used to separate the component of the glutathione protected gold clusters up to Au(160) core size and compare the size with the mobility data from PAGE. Both electrospray mass spectrometry and transmiss...
Seiichi Sato   Takatoshi Ikeda   Kengo Hamada   Keisaku Kimura   
SOLID STATE COMMUNICATIONS 149(21-22) 862-865 2009年6月 [査読有り]
A germanium (Ge) nanoparticle surface was etched in an aqueous solution under monochromatic light irradiation in the infrared-to-ultraviolet region. Since the bandgap widened up to the photon energy of the irradiating light, the average size of th...