Image: Ni foam

Description: An optical image (top) and an SEM image (bottom) of a Ni foam
Title: Ni foam
Credit: [1] (Fig. 1 tweaked)
Author: Zhonghua Ren, Jianpeng Li, Yaqi Ren, Shuguang Wang, Yejun Qiu & Jie Yu
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License: CC BY 4.0
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