Photofunctional Characteristics at Interfaces

界面处的光功能特性

基本信息

批准号：
14050001
负责人：
KITAMURA Noboru
金额：
$ 21.89万
依托单位：
Hokkaido University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2006
项目状态：
已结题

项目摘要

Irradiation of a focused 1064 nm laser beam to an aqueous butanol solution under an optical microscope gives rise to formation of a single butanol microdroplet through photo-thermal phase separation of the solution. Simultaneously, the butanol microdroplet produced can be manipulated in space by the 1064 nm laser beam and studied by fluorescence/Raman microspectroscopies. The particular technique was also combined successfully with a microchip as well as with a capillary electrophoresis. On the basis of such a new developed technique, an ultra-race amount of an analyte in an aqueous butanol solution can be extracted into a single picoliter butanol droplet by laser irradiation and the liquid/liquid extraction processes of the analyte have been studied in detail on the basis of fluorescence microspectroscopy. In the case of the use of a microchip, in particular, consecutive and automatic liquid/liquid extraction of an analyte into a single droplet has been achieved by a laser beam. Furth … More ermore, the analyte separated by a capillary electrophoresis has been extracted and analyzed by the present methodology, which has high potential as a novel technique for microanalytical chemistry.On the other hand, gold electrodes modified with a ferrocene-terminated alkanethiol self-assembled monolayer (SAM) have been successfully integrated into a polymer microchannel chip. On the basis of oxidation-reduction reactions of the ferrocenyl groups in the SAM, electrochemical flow control of the solution in a microchannel has been demonstrated. The fundamental mechanisms of the electrochemical flow control in the microchannel chip have been also elucidated on the basis of contact angle measurements and surface-enhanced infrared absorption spectroscopy. The study has demonstrated that a perchlorate anion as a counter ion of the ferrocenium cation adsorbed simultaneously onto the SAM surface upon the electrochemical oxidation of the ferrocenyl group in the SAM and this accompanies adsorption of water molecules on the SAM surface, giving rise to the increase in the wettability of the SAM/electrode surface. Upon reduction of the ferrocenyl group, a perchlorate ion and water molecules distribute to the water phase. Through adsorption/desorption of a perchlorate ion and water molecule, the surface wettability can be controlled electrochemically. Less

在光学显微镜下，聚焦的1064 nm激光束对水溶液溶液的辐射会通过溶液的光热相分离产生单个丁醇显微镜的形式。同时，可以通过1064 nm激光束在空间中操纵产生的丁醇微颗粒，并通过荧光/拉曼微光谱杆菌进行研究。该特定技术还与微芯片以及毛细管电泳成功合并。基于这种新开发的技术，可以通过激光照射将超级量的分析物在水溶液溶液中提取到单个PICOLITER丁醇液滴中，并且已经根据泛光微光谱镜详细研究了分析物的液体/液体提取过程。在使用微芯片的情况下，激光束实现了分析物中的连续和自动液体/液体提取到单滴。更重要的是，通过本方法提取和分析了通过毛细管电泳分离的分析物，该方法作为微分析化学的新技术具有很高的潜力。另一方面，用二甲基末端的烷烃自组装单层（SAM）修饰的金电极已成功整合到聚合物微通道芯片中。基于甲基苯基在SAM中的氧化还原反应，已经证明了微通道中溶液的电化学流控制。微通道芯片中电化学流控制的基本机制也已根据接触角度测量和表面增强的非授予光谱阐明。该研究表明，高氯酸盐阴离子是氟化纤维阳离子的反离子，在SAM中的甲基丙基基团的电化学氧化上，简单地吸附到SAM表面上，这涉及Sam/Electerode表面的湿气表面的增长，这涉及水分子在SAM表面上的吸附。减少亚铁丙基群后，高氯酸盐离子和水分子分布到水相。通过高氯酸盐离子和水分子的添加/解吸，可以通过电化学控制表面润湿性。较少的