• VEHICLE ENGINES. APPLICATION OF FUELS TYPES. EFFICIENCY

    SURFACE PLASMON RESONANCE – A PROMISING METHOD FOR ESTIMATING THE QUALITY OF MOTOR OIL

    Trans Motauto World, Vol. 2 (2017), Issue 1, pg(s) 41-44

    Shown in this paper is the possibility to diagnose quality of motor oil by using the method of surface plasmon resonance (SPR) Investigated in this work were four samples of the motor oil Genuine 5w-30 dexos 2, namely: the fresh one and three ones taken after car mileages 180, 430 and 712 km. When measuring the kinetics of refraction indexes for the studied samples of used oil, the authors observed a characteristic “shoulder” caused by sedimentation of oxidation and wear particles on the surface of SPR device sensitive element, while in the case of fresh oil there took place only the temperature drift of the refraction index. It has been experimentally shown that using the SPR method improves more than one order (from Δfmin = 0.17 vol.% down to Δfmin = 0.0107 vol.%) the detection limit and enhances sensitivity of measuring the wear particles concentration in motor oil as compared with the refractometric method. Thus, it is experimentally proved that the SPR method can be offered to control quality of motor oils as well as the degree of wear inherent to interacting parts of machinery.

  • ADVANCED DESIGN AND TECHNOLOGY FOR PRODUCTION OF SENSOR ELEMENTS IN DEVICES BASED ON SURFACE PLASMON RESONANCE

    Machines. Technologies. Materials., Vol. 8 (2014), Issue 11, pg(s) 3-6

    Results of researches are showed, that fabrication technology of sensor elements are used in devices based on surface plasmon resonance significantly affects on the increasing uptime of measuring and substantially increases the sensitivity to low concentrations of analytes. The results of investigations have shown that deposition of plasmonexciting metal layer on glass substrate at the chosen angle enables to enhance sensitivity of the surface plasmon resonance sensor by 1.5 times for liquid media and 2 times for gas-like media as compared with standard gold chips as well as improve uniformity of deposition and durability of ligand binding to the sensitive layer. Diagnostic facilities based on surface plasmon resonance possess a high sensitivity to low concentrations of studied substances, which enables one to use them as precise analytical devices in lab investigations in industry, agriculture, medicine, and ecology.