Peer review is the driving force of journal development, and reviewers are gatekeepers who ensure that Surfaces maintains its standards for the high quality of its published papers. Thanks to the cooperation of our reviewers, in 2021, the median time to first decision was 15 days and the median time to publication was 36.5 days. The editors would like to express their sincere gratitude to the following reviewers for their precious time and dedication, regardless of whether the papers were finally published:
| Abou-Kandil, Ahmed I. | Kotsiomiti, Eleni |
| Ali Shah, Anwar-ul-Haq | Kwon, Oh Seok |
| Atuchin, Victor | Leśniak, Magdalena |
| Aversa, Lucrezia | Manakhov, Anton |
| Barbinta-Patrascu, Marcela-Elisabeta | Manini, Paola |
| Bessergenev, Valentin G. | Memon, Hafeezullah |
| Braga, Guilherme S. | Minakshi, Manickam |
| Brantley, William A. | Morales-García, Ángel |
| Bulgariu, Laura | Morkoc, Hadis |
| Chang, Hai-Chou | Naghdi, Samira |
| Chen, Chengpeng | Pielichowski, Krzysztof |
| Du, Cheng-Feng | Rijckaert, Hannes |
| Fabianowski, Wojciech | Rodrigo, Luis |
| Fattah, Sarinj | Rodrigues, Natércia d. N. |
| Favieres, Cristina | Rubio, Ramón González |
| Felgueiras, Helena | Sasaki, Nobuo |
| Ferreira, Quirina | Selli, Elena |
| Fotovvati, Behzad | Silva, Elisângela |
| Francesco, Carla | Tan, Qinggang |
| Fukushima, Tomohiro | Thangavel, Gurunathan |
| Gangadharan, Rajan | Tien, Chuen-Lin |
| Garoli, Denis | Tverdokhlebov, Sergei |
| Gauden, Piotr | Tzetzis, Dimitrios |
| Ghadami, Farzin | Varade, Vaibhav |
| Ghahari, Seyed Ali | Velea, Alin |
| Hosu, Oana | Wang, Ruoxing |
| Ihsanullah, Ihsanullah | Yadav, Hemraj |
| Janas, Dawid | Yoshioka, Tomohiko |
| Jarząbek, Bożena |
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