The invention relates to a preparation method of light-driven nano
plant flower-transmission
powder. The preparation method comprises the following steps: mixing a
chitosan solution with a
PLGA solution, adding a stabilizer, performing
ultrasonic emulsification, adding a cross-linking agent, performing constant-temperature dispersion, performing centrifugal washing, and performing
freeze drying to obtain porous
chitosan-
PLGA particles; dispersing the porous
chitosan-
PLGA particles in PBS (
Phosphate Buffer Solution), adding sulfhydrylated SLG, oscillating and dialyzing to obtain functional particles of which the surfaces are grafted with targeting groups; mixing the porous chitosan-PLGA particles with the dried
pollen, and oscillating in a vacuum adsorption device; and adding a photo-thermal response material dispersion liquid, continuing vacuum adsorption, and packaging a PLGA shell layer.
Light energy is absorbed by the photo-thermal response material and then converted into
heat energy,
thermophoresis of a surrounding medium is triggered, the nano-
particle material is pushed to move directionally, namely
surface charges are generated under illumination, controllable movement is achieved through an external
electric field or a self
potential difference, and the photo-thermal response material can respond to the surface of the nano-
particle material according to the
local illumination intensity difference. And the nano-
particle material is guided to move along the
light intensity gradient, so that targeted
pollination is realized.