Characterization of a DC-driven microplasma between a capillary tube and water surface Y. Lu, S. F. Xu, X. X. Zhong, K. Ostrikov, U. Cvelbar and D. Mariotti EPL, 102 1 (2013) 15002 Published online: 15 April 2013 DOI: 10.1209/0295-5075/102/15002