Surface plasmon resonance sensor based on a new opto-mechanical scanning mechanism

Devanarayanan, V.P.; Manjuladevi, V.; Gupta, Raj K.

doi:10.1016/j.snb.2016.01.027

Cited by 20 publications

(17 citation statements)

References 36 publications

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“…The linear behavior is a good indicator for the development of a sensor. The slope of a response curve is a measure of sensitivity of the sensor . The linear behavior of the response is fit linearly and the slope of the straight line was found to be 15.5 ng/cm 2 /ppb.…”

Section: Resultsmentioning

confidence: 99%

Detection of Cadmium Ion in Potable Water Using Quartz Crystal Microbalance

Taneja¹,

Manjuladevi²,

Gupta³

et al. 2017

Macromolecular Symposia

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The presence of heavy metal e.g. cadmium in potable water is one of the major threats on our health. It should be detected and removed from potable water before consumption. The maximum permissible concentration of cadmium ion in drinking water lies in the range of 2–10 ppb. The consumption of excessive cadmium through potable water can lead to cancer, and can affect the organs like kidney and lungs severely. In this article, we report the development of a piezoelectric based sensor for the detection of cadmium ion in water. A functional layer of nanocomposite of single walled carbon nanotubes and beewax was deposited by spin coating technique onto 5 MHz AT‐cut quartz crystal wafers and the shift in resonance due to physioadsorption of cadmium from water medium was recorded. We find a very stable linear response curve with the lowest detectable concentration of 5.2 ppb. The change in the morphology of the functional layer before and after adsorption of cadmium is studied using atomic force microscope and field emission scanning electron microscope. The presence of calcium ion in water medium affected the response curves of cadmium sensing. We found a systematic variation in sensitivity towards Cd ion due to the presence of Ca ion in water medium.

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Section: Resultsmentioning

confidence: 99%

Detection of Cadmium Ion in Potable Water Using Quartz Crystal Microbalance

Taneja¹,

Manjuladevi²,

Gupta³

et al. 2017

Macromolecular Symposia

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“…The shift in RA can be measured very precisely and the corresponding change in RI can be calculated theoretically using the Fresnel's relations [9]. In addition to the traditional sensing applications, the SPR phenomenon can also be used for the measurement of optical anisotropy in thin films [10], temperature measurement [11][12][13] and optical filter [14].…”

Section: Introductionmentioning

confidence: 99%

“…A typical resolution of the Kretschmann configuration based SPR instrument lies in the range of 10 −5 to 10 −7 RIU [9,15,16]. Such a high resolution in the measurement of RI using SPR was successfully utilized for quantification of optical anisotropy in ultrathin films.…”

Section: Introductionmentioning

confidence: 99%

Surface plasmon resonance for in-plane birefringence measurement of anisotropic thin organic film

Kumar¹,

Gupta²,

V.³

et al. 2021

Preprint

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The measurement of in-plane birefringence (∆n) of ultrathin film is challenging due to a significant deviation of physical properties of materials in ultrathin regime as compared to that in bulk state. Surface plasmon resonance (SPR) phenomenon can be employed to measure change in refractive index of ultrathin film at a very high resolution. This article discusses simulation of SPR phenomenon in Kretschmann configuration for the measurement of ∆n in organic thin film exhibiting nematic-like ordering on the two dimensional gold surface. The distribution of plasmonic field on the gold surface was found to be anisotropic. This suggested that the coupling plasmonic field with that of organic thin film exhibiting nematic-like ordering on the gold surface will be non-isotropic. Therefore, a non-zero difference in resonance angle (RA) was obtained from SPR measurement performed along the optic-axis (OA) and orthogonal to OA of the in-plane nematic ordering (∆θ). A calibration surface showing the variation of (∆θ) as a function of ∆n and thickness of thin organic film consisting of shape anisotropic tilted molecules exhibiting nematic-like ordering on gold surface was obtained. This calibration surface was employed for the measurement of ∆n of single layer of Langmuir-Blodgett films of cadmium stearate (CdSA) and 4'-octyl-4-biphenylcarbonitrile (8CB) deposited on SPR chips. The thickness of the LB films was estimated using X-ray reflectivity measurement and ∆θ was measured using a home built SPR instrument. The ∆n values were found to be 0.012 and 0.022 for ultrathin films of CdSA and 8CB molecules, respectively.

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“…e decreasing degree of the output light is related to the the incident light, and the SPR angle is the incident light as the output light is decreased to the minimum. SPR can be excited in a variety of ways, such as prism coupling, grating coupling, and optical fiber coupling, and SPR has been extensively used in sensing of various physical, chemical, and biochemical parameters [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

High-Sensitivity Biosensor-Based Enhanced SPR by ZnO/MoS₂ Nanowires Array Layer with Graphene Oxide Nanosheet

Guo

et al. 2020

International Journal of Optics

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A novel SPR biosensor that can achieve a high sensitivity is proposed; therefore, a new prism coupling structure based on metal nanowires array layer is designed in this paper. The thickness of each medium layer for the structure is analyzed to obtain the optimal SPR spectrum, by the finite element method, so that the sensitivity is able to be enhanced greatly. The optimal thicknesses of each medium layer are given, and the sensitivity of the SPR biosensor can reach as high as 210.75°/RIU for the refractive index of the sensing medium, from 1.30 to 1.38.

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Surface plasmon resonance sensor based on a new opto-mechanical scanning mechanism

Cited by 20 publications

References 36 publications

Detection of Cadmium Ion in Potable Water Using Quartz Crystal Microbalance

Detection of Cadmium Ion in Potable Water Using Quartz Crystal Microbalance

Surface plasmon resonance for in-plane birefringence measurement of anisotropic thin organic film

High-Sensitivity Biosensor-Based Enhanced SPR by ZnO/MoS₂ Nanowires Array Layer with Graphene Oxide Nanosheet

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Surface plasmon resonance sensor based on a new opto-mechanical scanning mechanism

Cited by 20 publications

References 36 publications

Detection of Cadmium Ion in Potable Water Using Quartz Crystal Microbalance

Detection of Cadmium Ion in Potable Water Using Quartz Crystal Microbalance

Surface plasmon resonance for in-plane birefringence measurement of anisotropic thin organic film

High-Sensitivity Biosensor-Based Enhanced SPR by ZnO/MoS2 Nanowires Array Layer with Graphene Oxide Nanosheet

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Product

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High-Sensitivity Biosensor-Based Enhanced SPR by ZnO/MoS₂ Nanowires Array Layer with Graphene Oxide Nanosheet