题目：功能纳米颗粒的密度梯度离心分离与纯化/Separation and purification of functional nanoparticles by density gradient untracentrifugation
Nanoseparation is attracting more and more interest as an important and effective complementary process to synthesis optimization for providing strictly monodisperse nanoparticles (NPs) for investigations of their size- or shape-dependent properties and assembly into superstructures or elaborate nanodevices. Here we adopted "density gradient ultracentrifuge separation" (DGUS) method for separation of polydisperse colloids to obtain more monodisperse or unique colloidal fractions. DGUS method was demonstrated a general method not only for sorting nanoparticles with different size and morphology but also applicable for various materials, such as noble metal, carbon, S-group semiconductor, or hydroxide compounds etc. Meanwhile, DGUS separation can be carried out in both aqueous and organic media. Combined with two insoluable solvents, DGUS method could even act as a hyperconcentration or hyperpurification technique for colloidal nanoparticles when centrifuging them through water/oil interfaces. Models were set up for typical systems for separation optimization. A series of nano-effects were observed or evidenced on these fractions as property investigations were performed, which provided chance to get deeper view into the structure-property relationship of colloidal nanoparticles. More importantly, nanoseparation demonstrated to us that the formation of nanoparticles with varied sizes or morphologies in one batch is not a random behavior; in contrast, they are closely related to synthetic parameters, properties of fractions, and composition distribution. The findings provide new inspirations for synthesis optimization. Furthermore, DGUS method could also be applied as an efficient analysis tool for investigation of reaction intermediate, assembly mechanisms and other quick reactions. Finally, DGUS have now been developed as a complete fabrication system for constructing monodisperse highly ordered assemblies.
主要从事无机功能材纳米料研究，在无机功能纳米结构的控制合成、表面改性与光电性能等方面取得系列有显著创新性和应用价值的成果。主持的科研项目包括国家杰出青年基金项目1项、国家“973”计划课题2项、国家自然科学基金2项。已在J. Am. Chem. Soc. (2篇)、Angew. Chem. Int. Ed. (4篇) 、Adv. Mater.(2篇), ACS Nano(2篇), Nano Res., Chem. Eur. J. 等国际顶级学术期刊上以第一作者及通讯联系人发表论文70余篇，他引3800余次，单篇最高引用680多次。获国家发明专利授权6项；申请国际专利2项。