[1] Univ Twente, Mol Nanofabricat Grp, NL-7500 AE Enschede, Netherlands
[2] Univ Twente, Biophys Engn Grp, NL-7500 AE Enschede, Netherlands
[3] Univ Twente, Transducer Sci & Technol Grp, NL-7500 AE Enschede, Netherlands
[4] Univ Sheffield, Dept Mol Biol & Biotechnol, Sheffield S10 2TN, S Yorkshire, England