|
Nano-gallium phosphide (GaP) is an important group III-V compound semiconductor nano materials due to their novel different material properties, particularly optical properties at the nano-photonics and potential applications to science research and technical applications aroused widespread interest. But the current method of preparation of GaP nanocrystals is still relatively small, high requirements on the reaction conditions, not only requires water and oxygen, but also requires high temperature, long reaction against Nanocrystals control ability is poor, difficult to obtain high-quality nanocrystals . In this paper, on the basis of previous work research group, based on recent progress in nano-materials preparation and crystal growth mechanism, using a reverse micelle method and multi-step benzene thermal method attempts to GaP Nanocrystals regulate in order to get high-quality nanomaterials. After several tests, get some good results, and these results are discussed for the next Nanomaterials provide a foundation. CTAB in xylene was added to form reverse micelles, reverse micelles become the main place reaction, reverse micelle in xylene is spherical particles thus obtained are mostly spherical particles, the particle size is relatively small, CTAB of coated weakened reunion obtain good dispersion of the particles. Benzene thermal method to change multi-step quality nanocrystals, after many tests we obtained the best time to feed three times and the best dosage. Feeding a first nucleation, the second growth, the third thing increasing the crystallinity, the particle size distribution narrower. Finally we got a small particle size and narrow distribution, single dispersion, high crystallinity GaP quantum dots. UV - visible spectroscopy validate its strong quantum effects. The GaP nanocrystals prepared by ultrasonic irradiation and morin prepared complexes, detection complex spectra UV-visible absorption and fluorescence emission spectra of the two substances had weak absorption, but the compound after the strong absorption, the absorption peak position in between the two substances, and the ligand-field region, the same emission peak is in between the two, which can explain the GaP nanocrystals and morin-OH group forming a chemical bond. After several tests to explore the best ratio of composites with coumarin as a reference calculation fluorescence quantum yield is 25%, and finally with the best ratio of the complex solution tested stability of the complexes, indicating that types of nano-composite material can be present in the water for a long time stability, fluorescence intensity hardly decreased.
|