Photo-force controlled molecular systems and materials

光力控制的分子系统和材料

基本信息

批准号：
14103006
负责人：
MASUHARA Hiroshi
金额：
$ 67.23万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (S)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14103006/
关键词：
Laser Trapping Photon pressure Chemistry Gold nanoparticle Polymer nanosphere Hyper Rayleigh scattering Hyper Raman scattering Single nanoparticle spectroscopy Two-photon excitation fluorescence 光捕捉 J会合体光重合蛍光スペクトル蛍光相関分光高分子

项目摘要

We have explored new phenomena by applying photon pressure of a focused 1064 nm laser beam to molecular and nanoparticle systems in solution and analyzed their trapping and assembling dynamics from molecular viewpoints. New laser deposition phenomena were found and elucidated, while new spectroscopic and patterning methods for individual nanoparticles were proposed. The results are novel and form a new research area on "photon pressure chemistry", whose main results are listed below.1. Fiber-like structure of polymers in solution at room temperature are prepared by the focused beam and deposited on a substrate. The preparation is made possible under the super-saturated condition realized by trapping polymers in the flowing solvent.2. When the beam is intense, simultaneous trapping of the polymer and deformation of the solution surface is made possible. As a result polymer assembly is left at the focal point, whose volume is largest at the medium laser power, for which a model was presented.3. Optical trapping dynamics of fluorescent polymer nanospheres were measured by single particle fluorescence measurement and fluorescence correlation spectroscopy, and how trapping of individual nanoshperes evolves to a large aggregate was analyzed.4. Laser trapping and spectroscopy of single nanoparticles and nanocrystals in solution was successfully demonstrated for gold nanoparticles, J-aggregates, and silver nanopaticles with dyes.5. A 3-dimensional trapping and patterning method of single nanoparticles in solution was presented by combining trapping, heating, and polymerization. This method will be useful to pattern soft materials such as polymers, dendrimers, proteins, living cells, and others in solution.

我们通过将聚焦的1064 nm激光束的光子压力应用于溶液中的分子和纳米颗粒系统，并分析了它们从分子观点中分析其捕获和组装动力学，从而探索了新现象。发现并阐明了新的激光沉积现象，同时提出了单个纳米颗粒的新光谱和图案化方法。结果是新颖的，并形成了“光子压力化学”的新研究领域，其主要结果在下面列出1。聚合物在室温下的聚合物的纤维状结构由聚焦梁制备，并沉积在基板上。在流动溶剂中捕获聚合物实现的超饱和条件下，制剂成为可能。2。当光束强烈时，可以同时捕获聚合物并使溶液表面的变形成为可能。结果，聚合物组件留在焦点，在中型激光功率下，其体积最大，为此呈现模型。3。通过单个颗粒荧光测量和荧光相关光谱法测量荧光聚合物纳米球的光学陷阱动力学，以及如何分析单个纳米杂质的捕获转化为大骨料。4。在溶液中，单纳米颗粒和纳米晶体的激光捕获和光谱已成功证明了带有染料的金纳米颗粒，J-聚集剂和银纳米剂。5。通过结合捕获，加热和聚合，提出了溶液中单纳米颗粒的3维捕获和模式化方法。该方法将有助于对诸如聚合物，树突聚合物，蛋白质，活细胞等诸如溶液中的柔软材料进行有用。