材料科学
化学气相沉积
物理气相沉积
沉积(地质)
中尺度气象学
化学工程
气相沉积
化学物理
纳米技术
薄膜
化学
物理
古生物学
气象学
工程类
生物
沉积物
作者
Debaditya Chatterjee,Shuoyuan Huang,Kaichen Gu,Jianzhu Ju,Junguang Yu,Harald Böck,Lian Yu,M. D. Ediger,Paul M. Voyles
出处
期刊:Nano Letters
[American Chemical Society]
日期:2023-02-17
卷期号:23 (5): 2009-2015
被引量:2
标识
DOI:10.1021/acs.nanolett.3c00197
摘要
Physical vapor deposition can be used to prepare highly stable organic glass systems where the molecules show orientational and translational ordering at the nanoscale. We have used low-dose four-dimensional scanning transmission electron microscopy (4D STEM), enabled by a fast direct electron detector, to map columnar order in glassy samples of a discotic mesogen using a 2 nm probe. Both vapor deposited and liquid cooled glassy films show domains of similar orientation, but their size varies from tens to hundreds of nanometers, depending on processing. Domain sizes are consistent with surface diffusion mediated ordering during film deposition. These results demonstrate the ability of low-dose 4D STEM to characterize mesoscale structure in a molecular glass system which may be relevant to organic electronics.
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