The editors of Micromachines would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2013:
| Abbott, Derek | Garstecki, Piotr | Lee, Yung-Chun |
| Abe, Jiro | Gebeshuber, Ille C. | Lepioufle, Bruno |
| Al-Kaysi, Rabih | Geng, Tao | Li, Wen J. |
| Ando’, Bruno | Georgilas, Iannis | Mak, Michael |
| Atencia, Javier | Gogolides, Evangelos | Malmstrom, Rex R. |
| Behnam, Mohsen | Gu, Jian | Manolache, Sorin O. |
| Benecke, Wolfgang | Guijt, Rosanne M. | Marcos |
| Bremond, Nicolas | Haick, Hossam | McFarlane, Nicole |
| Cameselle, Claudio | Haider, Mohammad Rafiqul | Meng, Dennis Desheng |
| Cheng, Chao-Min | Hartman, Ryan L. | Mohanty, Swomitra |
| Chiou, Pei-Yu | Heiskanen, Arto | Motosuke, Masahiro |
| Cho, Sung Kwon | Hill, Reghan J. | Nakano, Kimihiko |
| Choi, Wonjae | Hirshy, Hassan | Ng, Sum Huan |
| Chun, Myung-Suk | Hobbs, Jamie K. | Ngo, Ha-Duong |
| Chung, Sang Kug | Jaeger, Magnus S. | Nguyen, Nam-Trung |
| Cicuta, Pietro | James, Timothy | Ohta, Aaron T. |
| Consi, Thomas R. | Jornet, Josep Miquel | Padial-Molina, Miguel |
| Cozzolino, Daniel | Kanda, Kensuke | Park, Bum Jun |
| Crane, Matthew | Kaneda, Shohei | Park, Yong-Lae |
| Daniele, Passeri | Khismatullin, Damir B. | Pavel, Ioana E. |
| Del Valle, Manuel | Kim, Joonwon | Pelssers, Eduard |
| Deutsch, Mordechai | Kleinstreuer, Clement | Pérez-Murano, Francesc |
| Doktycz, Mitchel J. | Krylov, Slava | Postava, Kamil |
| Du, Hejun | Kuzyk, Mark G. | Prakash, Shaurya |
| Eda, Shigetoshi | Lang, Walter | Pui, Tze Sian |
| Ertl, Peter | Lee, Chia-Yen | Rack, Jeffrey J. |
| Retterer, Scott D. | Tang, Kea-Tiong | Wu, Chien-Jang |
| Sakaki, Kelly | Théodoly, Olivier | Wu, Hongkai |
| Schomburg, Werner Karl | Trau, Dieter | Wu, Jayne |
| Shikida, Mitsuhiro | Valley, Justin | Yang, Yingchen |
| Shim, Jung-uk | Volder, Michael De | Zare, Richard |
| Stampfl, Jürgen | Wakamoto, Yuichi | Zhu, Yonggang |
| Steager, Edward B. | Wang, Michael | |
| Talbi, M. Abdelkrim | Woyke, Tanja |
© 2014 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).