A novel technique to measure the sucrose concentration in hydrogel sucrose solution using two dimensional photonic crystal structures (original) (raw)
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Measurement of Sucrose Concentration Using Optical Metamaterial Structure Via FDTD Technique
IETE Journal of Research, 2020
The current communication deals with the investigation of sucrose concentration in aqueous solution using copper-based metamaterial structure at a wavelength of 1550 nm. In this article, 5 × 5 air holes are engraved on a copper-based metamaterial structure, which contains the different concentration of sucrose in aqueous solution. Further, the present structure manipulates with finite difference time domain (FDTD) technique to compute the sucrose concentration. Moreover, different losses (absorption loss, dispersion loss, propagation loss, and polarization loss) are measured for the same. Nevertheless, similar type of papers have been published, the present paper has a couple of benefits including the method of computation (FDTD) and the output variation (linear ship) with the concentration. Apart from this, the present research shows the error bar, which deals with an accurate measurement. Again a mathematical model is also obtained, which gives the relationship between the sucrose concentration and the output intensity. Further, output results declared that transmitted intensity varies linearly with the concentration of sucrose. Lastly, a feeble error in the commutation proclaims an accurate investigation of sucrose in their aqueous solution with the help of a photonic structure.
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Design of Photonic Crystal-Based Biosensor for Detection of Glucose Concentration in Urine
IEEE Sensors Journal, 2015
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Photonic crystal borax competitive binding carbohydrate sensing motif
The Analyst, 2009
We developed a photonic crystal sensing method for diol containing species such as carbohydrates based on a poly(vinyl alcohol) (PVA) hydrogel containing an embedded crystalline colloidal array (CCA). The polymerized CCA (PCCA) diffracts visible light. We show that in the presence of borax the diffraction wavelength shifts as the concentration of glucose changes. The diffraction shifts result from the competitive binding of glucose to borate, which reduces the concentration of borate bound to the PVA diols.
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IEEE Sensors Journal, 2015
In this paper, a 2-dimensional "Air holes in silicon slab" photonic crystal based structure with line defect has been designed and simulated for detection of high glucose concentration in urine from 0-15 mg/dl to 10 gm/dl in the wavelength range of 1530-1565 nm. High glucose concentration in urine is referred as "Glycosuria". The proposed sensor structure is modeled and simulated in time domain by using MEEP (MIT Electromagnetic Equation Propagation) simulation tool. Finite Difference Time Domain (FDTD) method has been used for the analysis. Band structure has been computed and Eigen frequencies have been extracted for each k-point for the designed sensor structure by using MPB (MIT Photonic Bands) simulation tool. The changes in the normalized output power levels, Quality (Q)-factor and resonant frequency have been observed for different concentrations of glucose present in urine. The calculated value of Q-factor obtained is Q=23575. The study has been done for normal urine and glycosuric urine. It is clear from the simulated graphs of transmission spectrum and band structure that for minute changes in the refractive index, the transmitted output power level range varies from 0.2298 dB to-0.091 dB and the resonant frequency range varies from 0.229259-0.22914 (in units of c/a) and hence it acts as a sensor for detection for "Glycosuria". Our designed sensor has achieved sensitivity of 638 nm /RIU.
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Analytical Chemistry, 2009
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The development of a sandwich-type biosensor for glucose quantification is presented. This work is focused on the optimization of the enzymatic matrix of the biosensor. The best performance was found for an enzymatic matrix composed by 30% w/w mucin, 70% w/w albumin, 1.35 U glucose oxidase (GOX) per sensor, and glutaraldehyde diluted to 3%. The crosslinking with glutaraldehyde transforms this mixture into a hydrogel that is entrapped between two membranes of polycarbonate. The selected sandwich-type biosensor showed very good response time, sensitivity, stability, and sensor-to-sensor reproducibility. According to the results presented in this manuscript, a biosensor prepared with very high amount of enzyme would not necessarily increase the analytical signal. Simulated curves are compared with experimental data to explain the dependence of sensitivity on the concentration of enzyme. In addition, this kind of comparison represents a quite simple way to estimate the value of v max ≈0.13 M s −1 from the amperometric response of a sensor prepared with 1.34 U of GOX. Considering that sandwich-type biosensors are commonly assembled as part of devices where the sample is diluted with buffer, the more than 3 orders of magnitude of linear behavior of this sensor would ensure the possibility for assessing any sample.