Dear Sir/Madam,
 
The Membranes Editorial Office would like to invite you to participate in this survey, which aims to acknowledge and reward the best cover stories published in Membranes in 2021.
For more detail, please visit the following website: https://www.mdpi.com/journal/membranes/awards/1757. 
 
We will randomly select the votes of 10 participants and, to show our appreciation for your involvement in the voting process, 10 selected participants will each receive a CHF 100 voucher.
 
Thank you very much for your support and for taking the time to complete this questionnaire!

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* 1. Please vote for the best one you thought from the following covers (12 in total). You could click the link to see the corresponding cover story in the journal website.

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* 2. Please fill in your contact so that we can contact you.

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