Surface Plasmon Resonance-A Promising Method for Estimating the Quality of Motor Oil (original) (raw)
Related papers
Real time oil control by surface plasmon resonance transduction methodology
Sensors and Actuators A: Physical, 2015
The present work focuses on the development of a Surface Plasmon Resonance (SPR) sensor transducer able to measure lubricant degradation in real time. Preliminary, several simulations were performed, by means of a commercial software (Film Wizard), in order to optimize for the specific application the sensor transducers in term of the proper choice and combination of metal layers material and thickness. In order to realize the sensing transducers, metal thin films were deposited onto SF10 glass slabs by e-beam evaporation. 4 sensing devices have been realized, calibrated and tested. They have been used to acquire the experimental reflectance curves of a new (0 km) and partially used synthetic motor oil (5700 km). Measurements proved that alteration of lubricants, which flow in the SPR sensing device, modifies the signal, which reaches the detector. Therefore, the system can be used to observe in real time oil degradation by the measurement of its optical properties, following the variation in surface plasmon resonance curves. Experimental results showed that all sensors provide good responses, variable within the range of 1%.
LWT - Food Science and Technology, 2013
The acid value (AV) of edible vegetable oils provides important information about the quality and the degree of purity of oil during processing and storage. The present study was designed to correlate the refractive index (RI) obtained using SPR with AV obtained using the official AOCS method (Cd 3a-63). The SPR curve obtained from methanol layer of oilemethanol mixture was converted into RI based on pure water. The value of RI increased with oleic acid content added in vegetable oil. Oleic acid content of soybean oil had the determination coefficient of 0.988 with RI of SPR and 0.997 with AV of the official method at the significant level of 0.01. Samples of refined vegetable oils (4 kinds and 12 brands) and pressed and non-refined vegetable oils (3 kinds and 9 brands) were analyzed. RI of SPR correlated well with the AV of the AOCS official method, with the determination coefficient of 0.91e0.98. Every correlation equations of oil samples have the same slope of 0.005 and y-intercept from 1.3297 to 1.3301.
Measuring Asphaltene Deposition Onset from Crude Oils Using Surface Plasmon Resonance
Energy & Fuels, 2017
We present a surface plasmon resonance (SPR) sensor for crude oils that can be used to directly measure asphaltene deposition onset. Surface plasmon resonance describes a condition in which light incident onto a highly conductive metallic film couples into resonant charge oscillations of the metal. The SPR condition is highly sensitive to slight perturbations in the dielectric environment in the immediate vicinity of the thin-film, less than 1 µm away at visible frequencies. Here, we show that shifts in the peak surface plasmon resonant wavelength can be used to measure the onset of deposition of asphaltenes from a titration experiment. Initially, the SPR peak wavelength of the neat crude oil is measured. Next, the gradual addition of n-heptane dilutes the crude oil and produces a lower SPR peak wavelength, which results from the lower refractive index of the mixture. When the amount of added n-heptane approaches the deposition onset point, asphaltenes precipitate and are deposited onto the thin-film surface. We then observe that the SPR peak wavelength increases as the deposit is formed on the sensing surface. The asphaltenes continue to deposit on the surface until a deposit thicker than the SPR field penetration depth is reached. Even though the crude oil has been substantially diluted in n-heptane, the final SPR peak wavelength exceeds that of the native crude oil due to the dense asphaltene deposit on the surface. Three crude oils were evaluated with the SPR approach for measuring asphaltene deposition onset.
CORROSION, 2012
An ASTM standard copper strip corrosion test is typically utilized to evaluate the corrosiveness of biodiesel toward a copper surface. Unfortunately, this technique is limited in its ability to qualify and distinguish the extent of attack for lowcorrosiveness biodiesel. In this study, a surface plasmon resonance (SPR) sensor using a copper layer was evaluated as a potentially more accurate means of assessing the aggressiveness of low-corrosiveness biodiesel. The experiments utilizing two different sensor designs were carried out at room temperature, and the results then were compared with those obtained by the ASTM standard copper strip corrosion standard test. The SPR-based technique was demonstrated to be considerably more sensitive than the ASTM standard, and it was capable of detecting a change in thickness with corrosion of less than 1.3 nm.
Surface plasmon resonance-based gold-coated biosensor for the detection of fuel adulteration
Journal of Computational Electronics, 2019
A novel surface plasmon resonance (SPR)-based gold-coated photonic crystal fiber (PCF) biosensor is proposed herein for the detection of oil adulteration. The overall performance is studied using full three-dimensional (3D) simulations based on the finite-difference method on a mesh of 221,209 elements in COMSOL Multiphysics software, considering adulteration measurements at 25 °C (298 K) on different mixtures and concentrations of adulterated oil. Such measurements of fuel adulteration can have important implications for the global economy and gross domestic product (GDP) growth, as well as for quality control of imported or exported crude oil and fossil fuels worldwide. In this regard, the oil sensor proposed herein represents an important option and is shown to offer better performance compared with other sensors. The main advantages of such plasmonic sensors are their reusability, low cost, and portability, while offering better accuracy than existing electronic sensors. The maximum performance in terms of the major optical parameters of birefringence (B i), coupling length (L c), power fraction (P f), confinement loss (α c), amplitude sensitivity (S a), wavelength sensitivity (S w), resolution (Rl), transmittance (T x), transmittance variance (T v), relative sensitivity (S r), figure of merit, and resonance (R 2) is found to be 4.0 × 10 −3 ,
Novel Detection of Diesel Adulteration Using Silver-Coated Surface Plasmon Resonance Sensor
Plasmonics, 2021
In this study, we propose a silver-coated (SPR-surface plasmon resonance) based biosensor for the detection of diesel adulteration for the first time in the field of bio-sensing. Here, the numerical analysis is done by COMSOL Multiphysics V-5.1 and fully simulation software MATLAB-V16 on 30190 mesh elements, 2792 boundary elements, and 206593 degrees of freedom using finite element method (FEM) at 25 0 C (298 K) for different concentration level. Moreover, the entire experiment on SPR-PCF is done for the major optical parameters for instance-Birefringence (B i), Coupling-length (L c), Power-fraction (P f), Confinement-loss (α c), Amplitudesensitivity (S a), Wavelength-sensitivity (S w), Resolution (R l), Transmittance (T x), Transmittancevariance (T v), Relative-sensitivity (S r), Figure-of-merit (F OM) and Resonance (R 2) etc which are respectively to their corresponding maximum performance profiles of 2.5 × 10 −3 , 1300 µm, 99.93%, 1200-1600 dB/cm,-7950 RIU −1 , 49941.169 nm/RIU , 6.319 × 10 −4 RIU ,-180 dB, 170 dB/RIU , 97.25%, 980, and 0.98312 at operating wavelength 0.5-2 µm. Therefore, it is noticed that the proposed sensor can be able to establish itself as one of the toughest candidates in fiber sensing. Also, diesel adulteration sensing including the entire working procedure using a SPR platform will be regarded as a novel procedure for diesel sensing in the history of photonics.
Analytical and Bioanalytical Chemistry, 2002
In order to simplify the procedure for assembling a surface-plasmon resonance (SPR) sensor, a refractive index matching polymer film was prepared as an alternative to the conventionally used matching oil. The refractive index matching polymer film, the refractive index of which was nearly equal to the prism and sensor chip material (a cover glass) of the SPR sensor, was prepared by casting a tetrahydrofuran solution of poly (vinyl chloride) (PVC) containing equal weights of dioctyl phthalate and tricresyl phosphate. The refractive index matching polymer film was found to have a refractive index of 1.516, which is identical to that of the prism and the cover glass used for the present SPR sensor. The utility of the matching polymer film for the SPR sensor was confirmed by the detection of anti-human albumin, based on an antigen-antibody reaction.
Prospective Directions for the Development of Surface Plasmon Resonance Studies in Ukraine
2017
Main centers for the development of applied plasmonics in Ukraine are Institute of Cybernetics and Lashkaryov Institute of Semiconductor Physics. The most significant advantage of biosensors “Plasmon” series produced by Lashkaryov Institute of Semiconductor Physics are block-modular design, which makes it easy to update the device for various applications and possibility investigation gaseous media. Original technical solutions allowed making quite inexpensive and affordable analytical device for researches in Ukraine, yet comparable in detection limit (3 × 10-6 RIU) and accuracy (± 1 × 10-6 RIU) with the most applicable instruments from the world’s leading manufacturers. Wide measuring range from 1,0 to 1,5 RIU allowed study liquids with high refractive index like motor oils and polymers. So, promising areas of development of SPR-devices are increasing their accuracy, improving the technology of manufacturing a sensitive element and developing algorithms for processing results. Thi...
Current Trends in Technology and Materials of Sensors Based on Surface Plasmon Resonance
Advances in Materials Science and Engineering
Considered in this review are main directions of developing technology and construction of the available sensors based on surface plasmon resonance phenomenon to increase their sensitivity and accuracy of measurements. It has been shown that reducing roughness of the plasmon carrying layer in the sensor as well as application of an additional covering dielectric layer with developed surface enables two-fold increase in the sensitivity due to the twice increased surface of interaction between the sensor and studied substance. The main technical way enabling to diminish surface roughness is thermal annealing, and the best result is usually reached for the annealing temperature 120 °С. In most cases, as a dielectric layer they use metal oxides Al2 O3 , TiO2 , SiOx and ZnO, which allows attaining the detection limit in changes of the studied substance refraction index close to 1 • 10–9, what is one order better than that in available commercial analytic devices based on SPR phenomenon. ...
2019
The laser based high resolution spectroscopic experimental techniques such as Laser Induced Breakdown Spectroscopy (LIBS), Rotating Disk Electrode Optical Emission spectroscopy (RDE-OES) and Surface Plasmon Resonance (SPR) have been used for the study of composition and degradation analysis of used engine oils. Engine oils are mainly composed of aliphatic and aromatics compounds and its soot contains hazardous components in the form of fine, coarse and ultrafine particles consisting of wear metal elements. Such coarse particulates matter (PM) and toxic elements are extremely dangerous for human health that can cause respiratory and genetic disorder in humans. The combustible soot from thermal power plants, industry, aircrafts, ships and vehicles can lead to the environmental and climate destabilization. It contributes towards global pollution for land, water, air and global warming for environment. The detection of such toxicants in the form of elemental analysis is a very serious i...