1. Scottish Microelectronics Centre, Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, Edinburgh, United Kingdom.
2. Institute of Marine Sciences—National Research Council (ISMAR-CNR), La Spezia, Italy.
3. Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts, USA.
4. Robotics Engineering Program, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts, USA.