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2.6. The Scanning Electron Microscope (SEM) Analysis of the Hydrogel

ZW Zhidan Wang
JW Jie Wu
XS Xiaoyu Shi
FS Fei Song
WG Wenli Gao
SL Shouxin Liu
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TM 3030 desktop scanning electron microscope (SEM) was used to observe the microscopic morphology of the gel in a low vacuum mode. The gel with swelling equilibrium under different conditions was quickly frozen with liquid nitrogen to better retain the gel morphology. Then the gel was dried by a freeze dryer. Before observation, 80 s of gold spray treatment is needed to improve the conductivity of the sample.

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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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