Static and dynamic self-assembly of nanoparticles and post-assembly modifications of the resulting materials
28 March 2019
Campus Groenenborger, Building U, Room 244 - Groenenborgerlaan 171 - 2020 Antwerpen
11:30 AM - 12:30 PM
Organization / co-organization:
EMAT lecture by Prof Rafal Klajn from Department of Organic Chemistry, Weizmann Institute of Science
Self-assembly has emerged as the method of choice for preparing materials made of nanosized particles [1–3]. Over the past several years, our group has been interested in developing new ways to control self-assembly of inorganic nanoparticles into higher-order, static and dynamic structures. I will begin this talk by discussing our most recent studies on electrostatic self-assembly of oppositely charged nanoparticles. We have conceived a novel method to induce co-assembly of positively- and negatively-charged nanoparticles, which, unlike previously reported methods, maintains the high surface charge on these nanoparticles during the self-assembly process, and leads to previously unknown assemblies . Next, I will introduce ways to control self-assembly of nanoparticles using external stimuli, such as light [5, 6], magnetic field [7, 8], and CO2 , as well as emerging applications of such nanoparticles [10, 11]. The final part of my talk will focus on post-assembly modifications of nanoparticle aggregates, and will demonstrate that such aggregates can serve as precursors for further transformations. Specifically, I will discuss selective etching of binary nanoparticle superlattices and its use to prepare a novel family of materials, non–close-packed nanoparticle arrays .
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