The Microstructure of Cellulose Nanocrystal Aerogels as Revealed by Transmission Electron Microscope Tomography

被引：29

作者：

Buesch, Christian ^{[1
]}

Smith, Sean W. ^{[2
]}

Eschbach, Peter ^{[3
]}

Conley, John F., Jr. ^{[2
]}

Simonsen, John ^{[1
]}

机构：

[1] Oregon State Univ, Wood Sci & Engn, 119 Richardson Hall, Corvallis, OR 97331 USA

[2] Oregon State Univ, Sch Elect Engn & Comp Sci, Kelley Engn Ctr 1148, Corvallis, OR 97331 USA

[3] Oregon State Univ, Linus Pauling Sci Ctr 145, Electron Microscopy Facil, Corvallis, OR 97331 USA

来源：

BIOMACROMOLECULES | 2016年 / 17卷 / 09期

基金：

美国国家科学基金会;

关键词：

MATERIALS SCIENCE; FILMS; NANOCOMPOSITES; RESOLUTION; NANOSCALE;

D O I：

10.1021/acs.biomac.6b00764

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

070307 [化学生物学]; 071010 [生物化学与分子生物学];

摘要：

The microstructure of highly porous cellulose nanocrystal (CNC) aerogels is investigated via transmission electron microscope (TEM) tomography. The aerogels were fabricated by first supercritically drying a carboxylated CNC organogel and then coating via atomic layer deposition with a thin conformal layer of Al2O3 to protect the CNCs against prolonged electron beam exposure. A series of images was then acquired, reconstructed, and segmented in order to generate a three-dimensional (3D) model of the aerogel. The model agrees well with theory and macroscopic measurements, indicating that a thin conformal inorganic coating enables TEM tomography as an analysis tool for microstructure characterization of CNC aerogels. The 3D model also reveals that the aerogels consist of randomly orientated CNCs that attach to one another primarily in three ways: end to end contact, "T" contact, and "X" contact.

引用

页码：2956 / 2962

页数：7

共 35 条

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