通过气相渗透对独立颗粒进行保形涂层处理。
Conformal Coating of Freestanding Particles by Vapor-Phase Infiltration.
作者信息
Liapis Andreas C, Subramanian Ashwanth, Cho Sangyeon, Kisslinger Kim, Nam Chang-Yong, Yun Seok-Hyun
机构信息
Wellman Center for Photomedicine, Massachusetts General Hospital and Harvard Medical School, Cambridge, MA, 02139, USA.
Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, USA.
出版信息
Adv Mater Interfaces. 2020 Dec 17;7(24). doi: 10.1002/admi.202001323. Epub 2020 Nov 9.
A novel atomic layer method for encapsulating individual micro- and nano-particles with thin (sub-10-nm) dielectric films is presented. This method leverages the diffusion of vapor-phase precursors through an underlying inert polymer film to achieve growth of a metal oxide film on all sides of the particle simultaneously; even on the side that is in contact with the substrate. Crucially, the deposition is performed on stationary particles and does not require an agitation mechanism or a special reaction chamber. Here, conformal coatings of alumina are shown to improve stability in aqueous environments for two optically-relevant particles: compound semiconductor laser microparticles and lead halide perovskite nanocrystals.
本文提出了一种新颖的原子层方法，用于用薄（小于10纳米）介电膜封装单个微米和纳米颗粒。该方法利用气相前驱体通过底层惰性聚合物膜的扩散，在颗粒的所有面上同时实现金属氧化物膜的生长；即使是与基板接触的面。至关重要的是，沉积是在固定颗粒上进行的，不需要搅拌机制或特殊的反应室。在此，氧化铝的保形涂层被证明可提高两种与光学相关的颗粒在水性环境中的稳定性：化合物半导体激光微粒和卤化铅钙钛矿纳米晶体。
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