Research Development Corporation of Japan

Other

Noboru Kitamura

Hiroaki Misawa

Keiji Sasaki

Hiroshi Masuhara

Masanori Koshioka

Masazumi Ishikawa

Kenji Kamada

Kiyoharu Nakatani

Tatsuya Uchida

Ryo Fujisawa

Particulates are trapped by laser beam and brought into contact with electrodes to electrochemically and spectroscopically measure the reaction process thereof. Precise measurement of the process of chemical reactions such as electrochemical and photochemical ones of a single particulate is made possible.

Method for forming particulate reaction and measuring method thereof

A method of spectrometry is disclosed for measuring transient absorbance and transient absorption spectrum of a substance to be measured at interfaces in liquid phase of particulates containing a fluorescent pigment and the substance to be measured by the utilization of optical resonance phenomenon. An apparatus for carrying out the method is also disclosed and comprises: (a) a pulse laser oscillator for exciting the fluorescent pigment and the substance to be measured, respectively; (b) an optical delay device for causing delay of any one of pulse laser beams of two kinds of wavelengths generated by the pulse laser oscillator; (c) a microscope system for condensing laser beams generated by the pulse laser oscillator and irradiating the condensed beams to the sample; and (d) a detector for detecting light emission of the sample. According to the method of the present invention, it is possible to measure transient absorbance and transient absorption spectrum at a high sensitivity even when particulates containing the substance to be measured in liquid phase are present.

Method and apparatus for spectrometric measurement of particulate

The present invention provides microprocessing and the device therefor which is characterized by radiating proessing pulse laser together with trapping laser to perform the modification and processing of particles and micropcapsules. In the case of using such method for implosion, the reaction group is caused to be released by imploding the micro capsule with the reactive goup enclosed to implosion, permitting specified reaction and processing.

Laser microprocessing and the device therefor

A method for forming a polymer particle is provided which involved irradiating a polymer solution with a laser beam. The polymer particle is formed at the focal area of the beam. The particle is reversible and disappears upon discontinuing the irradiation. Irreversible particles can be formed by including a reactive monomer in the solution. The particles are trapped by the beam and may be moved for processing and modification by moving the laser beam.

Method for forming and denaturing particles

A method for forming microilluminants, which comprises the steps of irradiating laser beam to microparticles doped with a laser pigment in a liquid medium, trapping the microparticles and causing these microparticles to emit light. According to this method, it is possible to form microilluminants, permitting application to new physical and chemical processes and to processing and modification of microparticles, and new developments such as optical STM.

Method for forming microilluminants

The present invention provides microprocessing and the device therefor which is characterized by radiating proessing pulse laser together with trapping laser to perform the modification and processing of particles and microcapsules. In the case of using such method for implosion, the reaction group is caused to be released by imploding the microcapsule with the reactive goup enclosed to implosion, permitting specified reaction and processing.

This invention provides laser trapping designed to trap a microparticle or a group of microparticles by scanning at least a focused laser beam at high speed. This laser trapping make it possible to control the formation of microparticles into a specified pattern according to the scanning form of the focused laser beam, fix and transport said pattern, and trap and manipulate the microparticles with lower index of refraction than that of a medium, or other photoreflective microparticles such as a metal. Consequently, with increasing degree of freedom of processing and modification on various microparticles, the field of application expands.

Growing community of inventors

Kyoto, Japan

Noboru Kitamura