@misc{WolpertWolfbeisMirsky, author = {Wolpert, Benjamin and Wolfbeis, Otto S. and Mirsky, Vladimir M.}, title = {Gas sensing properties of electrically conductive Cu(I) compounds at elevated temperatures}, series = {Sensors and Actuators B: Chemical}, volume = {142}, journal = {Sensors and Actuators B: Chemical}, number = {2}, issn = {0925-4005}, doi = {10.1016/j.snb.2009.04.042}, pages = {446 -- 450}, abstract = {Changes in the electrical conductance at 240 °C of a number of copper(I) compounds including CuI, CuBr, Cu2Te, Cu12Sb4S13, (CuI)2P14, and of NiO were measured following the exposure to the gases ammonia, nitrogen dioxide, nitrous oxide, carbon monoxide, carbon dioxide, and propane. Analytical sensitivity and kinetic parameters were compared quantitatively. The high diversity of sensitivity patterns makes these compounds promising candidates for use in sensor arrays. Principal component analysis of the data obtained with a virtual sensor array enabled highly selective sensing of five of the six analytes studied using only two principle components. Activation energies of the charge transport in the materials were determined.}, language = {en} } @misc{WolpertLeitlPfitzneretal., author = {Wolpert, Benjamin and Leitl, Michael and Pfitzner, Arno and Mirsky, Vladimir M.}, title = {Chemosensitive properties of electrically conductive Cu(I)-compounds at room temperature}, series = {Sensors and Actuators B: Chemical}, volume = {134}, journal = {Sensors and Actuators B: Chemical}, number = {2}, issn = {0925-4005}, doi = {10.1016/j.snb.2008.06.047}, pages = {839 -- 842}, abstract = {Changes of the electrical conductance of a number of inorganic copper(I) conductive compounds including Cu₁₂Sb₄S₁₃,CU₂O, CuI, CuBr and CuCl were tested on exposure to different gases and vapors, including ammonia, nitrogen monoxide, octanethiol, hydrogen chloride, acetic acid, formic acid, ethanol, humidity and piperidine. The sensitivity of the resistivity to ammonia was estimated as 2.7\%/ppm for CuBr,1.4\%/ppm for Cu₂O, 1.2\%/ppm for CuCl, 0.013\%/ppm for CuI, but only 0.0028\%/ppm for Cu₁₂Sb₄S₁₃. The highest selectivity for ammonia was observed for Cu₁₂Sb₄S₁₃. The sensitivity patterns of these materials to the tested gases and vapors are very different which makes them applicable for sensor arrays for identification and quantification of these species.}, language = {en} }