TY - GEN A1 - Vasjari, Majlinda A1 - Shirshov, Yuri M. A1 - Samoylov, Anton V. A1 - Mirsky, Vladimir M. T1 - SPR investigation of mercury reduction and oxidation on thin gold electrodes T2 - Journal of Electroanalytical Chemistry N2 - 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. KW - Surface plasmon resonance KW - Electrochemical SPR KW - Simultaneous SPR and voltammetry KW - Mercury KW - Amalgam Y1 - 2007 U6 - https://doi.org/10.1016/j.jelechem.2007.03.019 SN - 1572-6657 VL - 605 IS - 1 SP - 73 EP - 76 ER - 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 - Zynio, Stepan A. A1 - Samoylov, Anton V. A1 - Surovtseva, Elena R. A1 - Mirsky, Vladimir M. A1 - Shirshov, Yuri M. T1 - Bimetallic layers increase sensitivity of affinity sensors based on surface plasmon resonance T2 - Sensors N2 - 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. KW - Surface plasmon resonance KW - Biosensor KW - Sensitivity KW - Signal / noise ratio Y1 - 2002 U6 - https://doi.org/10.3390/s20200062 SN - 1424-8220 VL - 2 IS - 2 SP - 62 EP - 70 ER -