TY - JOUR A1 - Davydova, Marina A1 - Kulha, Pavel A1 - Laposa, Alexandr A1 - Hruska, Karel A1 - Demo, Pavel A1 - Kromka, Alexander T1 - Gas sensing properties of nanocrystalline diamond at room temperature JF - Beilstein Journal of Nanotechnology PY - 2014/// VL - 5 SP - 2339 EP - 2345 SN - 2190-4286 DO - 10.3762/bjnano.5.243 PB - Beilstein-Institut JA - Beilstein J. Nanotechnol. UR - https://doi.org/10.3762/bjnano.5.243 KW - gas sensor KW - integrator KW - interdigitated electrodes KW - nanocrystalline diamond KW - response N2 - This study describes an integrated NH3 sensor based on a hydrogenated nanocrystalline diamond (NCD)-sensitive layer coated on an interdigitated electrode structure. The gas sensing properties of the sensor structure were examined using a reducing gas (NH3) at room temperature and were found to be dependent on the electrode arrangement. A pronounced response of the sensor, which was comprised of dense electrode arrays (of 50 µm separation distance), was observed. The sensor functionality was explained by the surface transfer doping effect. Moreover, the three-dimensional model of the current density distribution of the hydrogenated NCD describes the transient flow of electrons between interdigitated electrodes and the hydrogenated NCD surface, that is, the formation of a closed current loop. ER -