Pt/Au双金属纳米粒子的制备及表征

Poly (N-vinyl-2-pyrrolidone)-protected Pt/Au bimetallic nanoparticles were obtained by reducing the mixture of HAuCl4 and H2PtCl6 with sodium borohydride. UV-vis spectra, transmission electronic microscopy and X-my diffraction reveal that the prepared bimetallic nanoparticles are of alloy structure.     

pH值对硫醇修饰的金纳米粒子聚集态的影响

制备了3 巯基丙酸修饰的金纳米颗粒,溶胶的pH值变化导致颗粒表面的电荷发生变化.随着pH值的降低,颗粒的聚集体增大,在pH值小于4时颗粒下沉.加碱增大溶胶的pH值,聚集的颗粒会重新分散.