Materials Functions in Nanometer Particles

纳米粒子中的材料功能

• 批准号: 10354005
• 负责人: KASUYA Atsuo
• 金额: $ 20.67万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10354005/
• 关键词: Nanometer Particles; Microclusters; Small Particles; II-VI Semiconductors; Metal Oxides; Carbon Clusters; C60; Colloid; 超微粒子; クラスター; クラスター集合体; CdSe; CdS; ナノ構造; 液体クロマトグラフ; 半導体粒子; 磁性流体; ナノ構造物質; II-VI族化合物

Nanometer-scale semiconductor and oxide particles are synthesized by solution methods with flotation, emulsion, or reverse micelle technique. Their physical and chemical properties are analyzed for specific materials functions. Sizes are controlled not only by synthesis conditions but also by making use of liquid chromatography.Small particles of Fe304 are synthesized in their diameter ranging from 4 to 20 nm. These particles are reacted with surfactants in solution and only smallest size particles of 5 nm are selected by flotation. Their size and shape are sufficiently uniform to form regular arrangement in two-dimension on a substrate. Magnetic measurements at 100 Oe show the blocking temperature of 15 K explained by the anisotropy energy coming form surface spin disorder around the surface.Small particles of CdSe of size as small as 1.3 nm are produced by reverse micelle technique. Optical measurements show a large quantum-size effect of blue shift to 415 nm as compared with 700 nm of the bulk. Absorption spectra are in good agreement with prediction by the spherical quantum well model with effective mass approximation.Other samples such as CeO2 and ZnO are also produced and their various photochemical effects such as photo-catalytic reactions are analyzed in terms of their size and shape.

纳米级半导体和氧化物颗粒通过溶液法采用浮选、乳液或反胶束技术合成。对它们的物理和化学特性进行分析以了解特定的材料功能。尺寸不仅可以通过合成条件来控制，还可以通过使用液相色谱来控制。合成的 Fe304 小颗粒的直径范围为 4 至 20 nm。这些颗粒与溶液中的表面活性剂反应，通过浮选仅选择最小尺寸的颗粒（5 nm）。它们的尺寸和形状足够均匀以在基底上形成二维规则排列。 100 Oe 下的磁测量显示 15 K 的阻挡温度可以通过表面周围的表面自旋无序产生的各向异性能量来解释。尺寸小至 1.3 nm 的 CdSe 小颗粒是通过反胶束技术生产的。光学测量显示，与 700 nm 的体相比，蓝移至 415 nm 具有较大的量子尺寸效应。吸收光谱与有效质量近似的球形量子阱模型的预测非常吻合。还制备了其他样品，例如CeO2和ZnO，并根据其尺寸和形状分析了它们的各种光化学效应，例如光催化反应。

项目成果

H.Takahash, E.Matsubara, A.Kasuya, K.Kikuchi Y.Chiba, T.Kudo, B.Jeyadewan, K.Tohji: "Extraction of fullerenes from residual soot using HIDE method"Proc. Int. Symp. on Cluster Assembled Materials, IPAP Conf.. Series3. 113-117 (2001)

H.Takahash、E.Matsubara、A.Kasuya、K.Kikuchi Y.Chiba、T.Kudo、B.Jeyadewan、K.Tohji：“使用 HIDE 方法从残余烟灰中提取富勒烯”Proc。

B.Sndarakannan, G.Milczarek, A.Kasuya, T.Ogawa, B.Jeyadevan, K.Tohji: "Investigation on the effect of particale size of CdS film on the hydrogen production"Proc. Int. Symp. on Cluster Assembled Materials, IPAP Conf.. Series3. 59-62 (2001)

B.Sndarakannan、G.Milczarek、A.Kasuya、T.Okawa、B.Jeyadevan、K.Tohji：“CdS 薄膜颗粒尺寸对制氢影响的研究”Proc。

T.Ogawa, Y.Sato, K.Shinoda, K.Motomiya, B.Jeyadevan, K.Tohji, A.Kasuya, Y.Nishina: "Purification method for SWNTs and its automation"Proc. Int. Symp. on Cluster Assembled Materials, IPAP Conf.. Series3. 97-100 (2001)

T.Okawa，Y.Sato，K.Shinoda，K.Motomiya，B.Jeyadevan，K.Tohji，A.Kasuya，Y.Nishina：“单壁碳纳米管的纯化方法及其自动化”Proc。

Y.Akimoto, T.Kudo, K.Shinoda, B.Jeyadewan, K.Tohji, T.Nirasawa, A.Kasuya, Y.Nishina: "Synthesis of water-soluble fullerene and its isolation"Proc. Int. Symp. on Cluster Assembled Materials, IPAP Conf.. Series3. 123-126 (2001)

Y.Akimoto，T.Kudo，K.Shinoda，B.Jeyadewan，K.Tohji，T.Nirasawa，A.Kasuya，Y.Nishina：“水溶性富勒烯的合成及其分离”Proc。

A.Kasuya: "Optical absorption spectra of Au2 using the gas evaporation technique: 211-229 nm"Molecular Physics. 96・1. 143-145 (1999)

A.Kasuya：“使用气体蒸发技术的 Au2 的光学吸收光谱：211-229 nm”分子物理学 96・1（1999）。