| The bio-compatible mercapto carboxylic acid molecule and NaBH4 as protective agent and reductant respectively, prepared Au nanoparticles with organic two-phase method, realized the function of the surface of metal nanoparticles. The nanomaterials synthesized by this method has small particle size (<5 nm) and good dispersion. Furthermore, the effects of the ratio of mercapto carboxylic acid to metal precursor, the amount of NaBH4, and the length of carbone chain for carboxylic acid molecular on the morphology of nanoparticles were studied. Except for Au, this method is also suitable for the surface modification of Ag, Pt and Pd nanoparticles. |
