@misc{VasjariShirshovSamoylovetal., author = {Vasjari, Majlinda and Shirshov, Yuri M. and Samoylov, Anton V. and Mirsky, Vladimir M.}, title = {SPR investigation of mercury reduction and oxidation on thin gold electrodes}, series = {Journal of Electroanalytical Chemistry}, volume = {605}, journal = {Journal of Electroanalytical Chemistry}, number = {1}, issn = {1572-6657}, doi = {10.1016/j.jelechem.2007.03.019}, pages = {73 -- 76}, abstract = {Mercury reduction and oxidation on ultrathin gold electrodes was investigated by simultaneous voltammetry and surface plasmon resonance (SPR). The angle dependencies of SPR signal were analyzed quantitatively. The results indicate partially reversible formation of amalgam with optical properties in between of optical properties of mercury and gold. Up to 12\% content of mercury in the gold layer is suggested.}, language = {en} } @misc{SamoylovMirskyHaoetal., author = {Samoylov, Anton V. and Mirsky, Vladimir M. and Hao, Qingli and Swart, Claudia and Shirshov, Yuri M. and Wolfbeis, Otto S.}, title = {Nanometer-thick SPR sensor for gaseous HCl}, series = {Sensors and Actuators B: Chemical}, volume = {106}, journal = {Sensors and Actuators B: Chemical}, number = {1}, issn = {0925-4005}, doi = {10.1016/j.snb.2004.08.029}, pages = {369 -- 372}, abstract = {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.}, language = {en} } @misc{ZynioSamoylovSurovtsevaetal., author = {Zynio, Stepan A. and Samoylov, Anton V. and Surovtseva, Elena R. and Mirsky, Vladimir M. and Shirshov, Yuri M.}, title = {Bimetallic layers increase sensitivity of affinity sensors based on surface plasmon resonance}, series = {Sensors}, volume = {2}, journal = {Sensors}, number = {2}, issn = {1424-8220}, doi = {10.3390/s20200062}, pages = {62 -- 70}, abstract = {Two metals are used in resonant layers for chemical sensors based on surface plasmon resonance (SPR) - gold and silver. Gold displays higher shift of the resonance angle to changes of ambient refraction index and is chemically stable. Silver posses narrower resonance curve thus providing a higher signal/noise ratio of SPR chemical sensors, but has a poor chemical stability. A new structure of resonant metallic film based on bimetallic silver/gold layers (gold as an outer layer) is suggested. It combines advantages of both gold and silver resonant layers. Bimetallic resonant films display so high shift of resonance angle on changes of ambient refraction index as gold films, but show narrower resonance curve, thus providing a higher signal / noise ratio. Additionally, the outer gold layer protects silver against oxidation.}, language = {en} }