1. Petrobras S.A., Rio de Janeiro, Brazil
2. Laboratory of Nano and Microfluidics and Microsystems, LabMEMS, Mechanical Engineering Department, POLI and COPPE, UFRJ, Federal University of Rio de Janeiro, Brazil
3. General Directorate of Nuclear and Technological Development, DGDNTM, Brazilian Navy, Rio de Janeiro, Brazil
4. Nanoengineered Systems Laboratory, UCL Mechanical Engineering, University College London, London WC1E 7JE, UK
5. Wellcome/EPSRC Centre for Interventional and Surgical Sciences (WEISS), University College London, London W1 W 7TS, UK