无机功能材料组邀请学术报告
Langmuir−Blodgett Colloidal Assembly: An Electrospray Update
报 告 人：Dr. Jiaxing Huang (美国西北大学)
报告时间：2016年11月6日（星期日）10:00-11:00
报告地点：过程大厦308会议室
主 办：无机功能材料课题组
报告人简介：
黄嘉兴教授2000年本科毕业于中国科学技术大学化学物理系，2004年于美国加州大学洛杉矶分校取得化学博士学位，2004-2007年获得米勒研究奖资助前往加州大学伯克利分校从事博士后工作。2007起在美国西北大学材料科学与工程系工作。他的研究组致力于实践这样一个理念：通过科研和教学来创造具有潜在用途的新知识，材料和技术；来培育直觉，激发创造力，并最好地提升自己。黄老师的研究组在材料化学方面做出了很多原创性的工作。本次报告将介绍他们在胶体颗粒的LB组装技术方面的进展。
报告简介：
LB assembly has been routinely used in research labs for nearly a century for preparing molecular and colloidal monolayers. Volatile, water-immiscible solvents are convenient for spreading, but they have also been a “pain” in terms of colloidal stability, processability and chemical safety, making scaled up applications difficult. The use of water-miscible spreading solvents would avoid all of these problems, but it tends to lose most materials to water subphase due to intermixing, making such LB colloidal assembly ineffective and hard to standardize or reproducible.
This dilemma can be solved by electrospray spreading, in which the small volume of the microdroplets is readily depleted during initial spreading, leaving no extra solvent for mixing. As is demonstrated with several prototypical colloidal systems, electrospray allows high-yield, high-throughput spreading of colloidal materials on water surface using environmentally benign, water-miscible solvents (even water itself), which liberates this century-old technique from many constrains related to material processing and significantly expands its scope. Electrospray apparatus can be readily automated and fully integrated with existing LB systems, which should help to standardize this technique and scale it up from LB assembly to LB manufacturing.
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