Controlled Deposition of Nano-scale Dots by Electrochemical Processes

通过电化学过程控制纳米级点的沉积

• 批准号: 12650694
• 负责人: MATSUBARA Hiroshi
• 金额: $ 1.66万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12650694/
• 关键词: Quantum dot; Electroless deposition; Displacement deposition; 初期析出; 微粒子

Some unusual physical properties will come out from the materials made of nano-sized microdots, quantum dot, in which movement of electrons is limited in a very small area. New electronic devices that have revolutionary excellent functions will be expected by using such new materials. In this study the investigator aims to realize the nano-scaled microdots by means of wet processes, especially electrochemical processes such as electroless deposition and displacement deposition. The investigator revealed that initial deposits of electroless deposition were suitable for the nano-sized dots. Nickel nano-dots were fabricated by electroless deposition. Density of the dots was controlled by the number of catalyzation cycles and pH of solutions. The controlled deposition was realized by monitoring the deposition process with a newly developed QCM technique. Ruthenium and palladium nano-dots were also fabricated by means of displacement deposition. Ruthenium and palladium cations were easily reduced by electrons supplied from an oxidation process of tin (II) ion to tin (IV) ion in aqueous solutions. The ruthenium coverage of 30 - 70% was obtained from the process. From the results shown above, several kinds of nano-sized dots were successfully fabricated by the investigator.

由纳米级的微粒、量子点构成的材料，由于电子的运动被限制在一个很小的区域内，会产生一些特殊的物理性质。通过使用此类新材料，具有革命性卓越功能的新型电子设备将备受期待。在这项研究中，研究者的目的是实现纳米尺度的微粒通过湿法工艺，特别是电化学过程，如化学沉积和置换沉积。研究人员透露，无电沉积的初始沉积物适合于纳米尺寸的点。采用化学沉积法制备了镍纳米点。通过催化循环次数和溶液pH值控制点的密度。采用新开发的QCM技术对沉积过程进行监控，实现了可控沉积。采用置换沉积法制备了钌和钯纳米点。钌和钯阳离子很容易被锡（II）离子在水溶液中氧化成锡（IV）离子的过程中提供的电子还原。从该方法获得30 - 70%的钌覆盖率。从以上结果来看，研究者成功地制备了几种纳米尺寸的点。