TY - GEN A1 - Samoylov, Anton V. A1 - Mirsky, Vladimir M. A1 - Hao, Qingli A1 - Swart, Claudia A1 - Shirshov, Yuri M. A1 - Wolfbeis, Otto S. T1 - Nanometer-thick SPR sensor for gaseous HCl T2 - Sensors and Actuators B: Chemical N2 - The optical properties of electrochemically polymerized N-methylaniline are changed in the presence of gaseous hydrogen chloride. This effect was used for preparation of chemical sensors with transduction based on surface plasmon resonance. The interaction of hydrogen chloride with a two nm layer of poly-(N-methylaniline) on gold leads to the shift of the surface plasmon resonance. The analysis of the resonance spectra demonstrates that the effect is caused by an increase of the imaginary component of the refractive index; a minor contribution is also provided by film condensation leading to an increase of the real component of the refractive index and a decrease in the thickness. The effect is selective and quasi-reversible. The concentration dependence of the gas effect obeys Langmuir's adsorption isotherm with a reciprocal value of the binding constant of 850 ± 160 ppm. KW - Gas sensor KW - HCI sensors KW - Surface plasmon resonance KW - Electropolymerization KW - Poly-(N-methyl-aniline) KW - Fire detector Y1 - 2005 U6 - https://doi.org/10.1016/j.snb.2004.08.029 SN - 0925-4005 VL - 106 IS - 1 SP - 369 EP - 372 ER - TY - GEN A1 - Ando, Masanori A1 - Swart, Claudia A1 - Pringsheim, Erika A1 - Mirsky, Vladimir M. A1 - Wolfbeis, Otto S. T1 - Optical ozone sensing properties of poly(2-chloroaniline), poly(N-methylaniline) and polyaniline films T2 - Sensors and Actuators B: Chemical N2 - The ozone-sensitive visible/near-IR absorbance changes of poly(2-chloroaniline) (P(2ClANI)), poly(N-methylaniline) (P(NMeANI)) and polyaniline (PANI) films were investigated. These three polymer films, which were assumed to be present partially in a protonated form and partially in a reduced form, were prepared by chemical oxidation of the monomers followed by treatment with the reducing agent disodium disulfite. The P(2ClANI) film was sensitive to ozone at concentrations of down to 2.5 ppm, but saturation of sensitivity started to appear above 50 ppm. By contrast, the PANI and P(NMeANI) films were sensitive to ozone in a concentration range of 50–100 ppm without showing saturation of sensitivity. KW - Optical ozone sensing KW - Poly(2-chloroaniline) film KW - Poly(N-methylaniline) film KW - Polyaniline film KW - Visible/near-IR absorbance change Y1 - 2005 U6 - https://doi.org/10.1016/j.snb.2004.12.083 SN - 0925-4005 VL - 108 IS - 1-2 SP - 528 EP - 534 ER - TY - GEN A1 - Ando, Masanori A1 - Swart, Claudia A1 - Pringsheim, Erika A1 - Mirsky, Vladimir M. A1 - Wolfbeis, Otto S. T1 - Ozone sensing properties of polyaniline derivatives T2 - Chemical Sensors (Suppl. B) Y1 - 2004 VL - 20 SP - 534 EP - 535 ER - TY - GEN A1 - Ando, Masanori A1 - Swart, Claudia A1 - Pringsheim, Erika A1 - Mirsky, Vladimir M. A1 - Wolfbeis, Otto S. T1 - Optical ozone detection by use of polyaniline film T2 - Solid State Ionics N2 - We report on the optical ozone sensitivity of a polyaniline (PANI) film prepared on the inner wall of a polystyrene cuvette by chemical oxidation of aniline from aqueous solution. The PANI film showed changes of optical absorbance in the presence of 50–100 ppm ozone in air at room temperature. The absorbance change was largest at wavelengths in the range of 500–800 nm. The absorbance changes brought about by ozone was partially reversible after removal of ozone from the atmosphere. These results suggest that PANI is a potential material for optical ozone detection. KW - Optical ozone detection KW - Polyaniline film KW - Visible near-IR absorption Y1 - 2002 U6 - https://doi.org/10.1016/S0167-2738(02)00338-7 SN - 0167-2738 VL - 152-153 SP - 819 EP - 822 ER -