[1] Aalto Univ, Phys Lab, NanoMat Grp, Espoo 02044, Finland
[2] Aalto Univ, Ctr New Mat, Espoo 02044, Finland
[3] Seoul Natl Univ, Sch Mech & Aerosp Engn, Inst Adv Machinery & Design, Natl CRI Ctr Nano Particle Control, Seoul 151742, South Korea
[4] Aalto Univ, Metrol Res Inst, Espoo 02015, Finland
[5] VTT Microtechnol & Sensors, Espoo 02044, Finland
[6] Aalto Univ, Lab Opt & Mol Mat, Mol Mat Grp, FI-02015 Espoo, Finland
[7] Aalto Univ, Ctr New Mat, FI-02015 Espoo, Finland
[8] VTT Biotechnol, Espoo 02044, Finland