2 results about "Electron absorption" patented technology

The application discloses an in-situ testing method for an electron transmission mechanism of an oxygen vacancy modified SrTiO3@Ag nanotube photocatalyst, and belongs to the technical field of energy materials. The method steps are as follows: first, SrTiO3 nanotubes are prepared by an in-situ electrospinning method; a SrTiO3@Ag nanotube is prepared by using a photoreduction method to anchor Ag nanoparticles near oxygen vacancies to construct a Schottky heterojunction. The electron absorption characteristics of the oxygen vacancies and the Ag nanoparticles provide a driving force for the transfer of photo-generated electrons, and the synergistic effect of the oxygen vacancies and the Ag nanoparticles greatly promotes the separation of photo-generated carriers. Subsequently, the migration direction of the photo-generated carriers in the system is characterized by in-situ irradiation XPS technology. By using the in-situ testing method, it is proved that the oxygen vacancies can serve as a "bridge" to transfer the photo-generated electrons activated by the SrTiO3 nanotubes to the active site Ag nanoparticles for a photocatalytic reduction reaction, and the electron transmission mechanism under the catalytic reaction condition is revealed. The method can provide a more convenient, more scientific and more actual scene conforming research mode for the research on the electron transmission mechanism of a photocatalyst with vacancies.

This invention discloses a super-resolution stimulated Raman scattering imaging method for drug distribution detection, comprising the following steps: The laser output from a laser is frequency-doubled and spatially shaped to generate three laser beams, one used as a Stokes beam, one as a pump beam, and one as a saturation beam; the Stokes beam and the pump beam are spatially collinear; the three beams are temporally coupled; the beams are connected to the scanning section of a microscope system; a digital acquisition card acquires signals, obtaining the modulation response of the pump beam to the Stokes beam, thereby monitoring drug distribution. This invention also discloses the application of this super-resolution stimulated Raman scattering imaging method for drug distribution detection in the cellular targeting and intracellular distribution of drugs in the nervous system. By controlling the spatial distribution of the laser, this invention enables a portion of molecules within the focal point to be in an electron absorption saturation state, which can suppress the pump detection signal and break the diffraction limit of non-fluorescent substances in far-field imaging.