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. 2022 Nov 16;12:19650. doi: 10.1038/s41598-022-21882-1

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© The Author(s) 2022, corrected publication 2022

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Preparation B of MS2. (A) Bright light microscope image. The sample is not in contact with the first C-layer. The green speckles are due to the camera. (B + C) SEM-SE + BSE imaging 2 kV | 10 Pa. (B) The carbon line is broken around the sample and it is not regular. (C) The detail of the uneven carbon layer of (B).