Capping Agent-Mediated Synthesis of Colloidal Nanocrystals
The understanding of size and shape controls of nanocrystals formed in solutions in the presence of capping agents, mostly surfactants, is still rather rudimental. This surfactant-based approach however has been widely used in making high quality shape-controlled monodisperse nanocrystals. In this presentation, I will discuss our recent understanding on the formation of different nanocrystals, including nanorods and worm-like structures. The platinum mixed alloy nanostructures will be given special attentions. The worm-like platinum alloy nanocrystals are formed in the presence of oleyamine and oleic acid through oriented attachment. High resolution transmission electron microscope (HR-TEM) is used to characterize the nanostructures. Molecular dynamic (MD) simulation is employed to obtain the stability and structural orders of the nanoparticles. The computational data suggest that the formation of Pt alloy nanowires is driven by the interplay between the binding energy and the collision characteristics of the primary nanoparticles. Such observation can have broad ramifications in the design of morphologically controllable nanomaterials.
Yang Hong
Department of Chemical Engineering, University of Rochester, 206 Gavett Hall, Rochester, New York 14627-0166, USA
国际会议
International Symposium on Crystal Engineering and Drug Delivery System 2009(2009晶体工程与药物传送系统国际会议)
天津
英文
71
2009-09-05（万方平台首次上网日期，不代表论文的发表时间）