Chandran Ramkumar, Dharmalingam Sangeetha
J Nanosci Nanotechnol. 2014 Sep;14(9):6957-64. doi: 10.1166/jnn.2014.8939.
A facile technique for the synthesis of PtCu core-shell nanoparticles (Pt@Cu and Cu@Pt) of size 10-15 nm by successive and co-reduction method is reported in this study. Optical studies such as UV-Vis and PL emission confirmed the formation of core-shell nanoparticles. The influence of particle segregation on alloy formation was studied. XRD studies revealed that the alloy formed after annealing of the core-shell nanoparticles was PtCu and PtCu3 and their average particle size was calculated to be 18 and 20 nm, respectively. The electrochemical studies of the core-shell and alloy nanoparticles revealed the segregation pattern and their stability.
本研究报道了一种通过连续共还原法合成尺寸为10 - 15纳米的PtCu核壳纳米粒子（Pt@Cu和Cu@Pt）的简便技术。紫外可见光谱和光致发光等光学研究证实了核壳纳米粒子的形成。研究了颗粒偏析对合金形成的影响。X射线衍射研究表明，核壳纳米粒子退火后形成的合金为PtCu和PtCu3，其平均粒径分别计算为18纳米和20纳米。核壳和合金纳米粒子的电化学研究揭示了偏析模式及其稳定性。
