Department of Chemistry , University of Illinois at Urbana-Champaign , 600 S. Mathews Avenue , Urbana , Illinois 61801 , United States.
Department of Materials Science and Engineering , University of Illinois at Urbana-Champaign , 1304 W. Green Street , Urbana , Illinois 61801 , United States.
Nano Lett. 2019 Mar 13;19(3):1938-1943. doi: 10.1021/acs.nanolett.8b05117. Epub 2019 Feb 12.
Spray-coating using ultrasonic nebulization is reported for depositing nanoparticles on a TEM grid without many of the drying artifacts that are often associated with drop-casting. Spray-coating is suitable for preparing TEM samples on fragile support materials, such as suspended single-layer graphene, that rupture when samples are prepared by drop-casting. Additionally, because ultrasonic nebulization produces uniform droplets, nanoparticles deposited by spray-coating occur on the TEM grid in clusters, whose size is dependent on the concentration of the nanoparticle dispersion, which may allow the concentration of nanoparticle dispersions to be estimated using TEM.
超声雾化喷涂被报道用于在 TEM 网格上沉积纳米颗粒，而不会产生许多与滴铸相关的干燥伪影。喷涂适用于制备脆弱支撑材料上的 TEM 样品，例如悬浮的单层石墨烯，当通过滴铸制备样品时，这些材料会破裂。此外，由于超声雾化产生均匀的液滴，通过喷涂沉积的纳米颗粒在 TEM 网格上以簇的形式出现，其大小取决于纳米颗粒分散体的浓度，这可能允许使用 TEM 估计纳米颗粒分散体的浓度。
