(354f) Supercritical Hydrothermal Synthesis Of Organic Inorganic Hybrid Nanoparticles And Perfect Dispersion | AIChE

(354f) Supercritical Hydrothermal Synthesis Of Organic Inorganic Hybrid Nanoparticles And Perfect Dispersion

Authors 

Adschiri, T. - Presenter, Tohoku University


We propose a new method to synthesize organic-inorganic hybrid nanoparticles at supercritical hydrothermal conditions. By introducing organic species (aminoacids, carboxylic acids, amines, alcohols, aldehydes etc.) during supercritical hydrothermal synthesis, nanoparticles whose surface was modified with organic molecules were synthesized. This is due to the homogeneous phase formation for organic substance and aqueous solution at supercritical conditions. Particle size was in the range from 2.5 nm to 10 nm, and particle size dispersion is extremely narrow. Crystal shape can be controlled to be sphere, nano-cube, nano-ribbon etc. By selecting a proper modifier, particles could be dispersed perfectly in organic solvents or in aqueous solutions. By drying the colloid, we obtained self-assembly structure of nanocrystals. This implies a variety of applications of the nanoparticels including nanohybrid polymers, nano-ink, nano-paints, and bio-imaging probe.