Cd concentration sensor based on fiber grating technology

Raikar, U. S.; Lalasangi, Anandkumar S.; Akki, Jyoti F.; Raikar, Prasad; Manohar, K. G.; Srinivas, T.; Badiger, N.M.; Radhakrishnan, P.

doi:10.1016/j.snb.2011.11.039

Cited by 17 publications

(5 citation statements)

References 15 publications

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“…[21][22][23][24] Due to the significance of Cd 2+ both in the environment and living organisms, many groups have contributed strategies that focus on organic dyes, nano-materials and polymers to develop Cd 2+ chemosensors for environmental monitoring and cell imaging. 14,21,[25][26][27][28][29][30][31][32] Most endeavors in this field have met the same issues whereby the chemosensors have relatively lower water solubility, biological compatibility, and higher toxicity. 10,33,34 Based on our knowledge, only a few examples have been reported to use peptide-based fluorescent chemosensors to detect Cd 2+ in live cells to satisfy the demands of biological applications.…”

Section: Introductionmentioning

confidence: 99%

A peptide-based fluorescent chemosensor for measuring cadmium ions in aqueous solutions and live cells

Wang

Liu

et al. 2015

Dalton Trans.

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A novel peptide fluorescent chemosensor (H2L) with a lysine backbone and both -NH2 sites conjugated with cysteine and dansyl groups has been designed and synthesized by solid phase peptide synthesis with Fmoc chemistry. This chemosensor is a promising analytical tool for detecting Cd(2+) based on the photo-induced electron transfer (PET) effect by turn-on response in 100% aqueous solutions. As designed, H2L exhibits excellent cell permeation and low biotoxicity as well as displaying relatively high selectivity and sensitivity. The chemosensor penetrated live HeLa cells and detected intracellular Cd(2+) by turn-on response. The binding stoichiometry and affinity, interference test, pH sensitivity, fluorescence quantum yield, quantum mechanical calculations, lifetimes, and cytotoxicity of the chemosensor H2L to Cd(2+) were also investigated. Moreover, H2L exhibits low biotoxicity with a limit of detection (LOD) for Cd(2+) of about 52 nM, implying that H2L can be used as a highly selective and sensitive peptide fluorescent chemosensor in biological systems.

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Section: Introductionmentioning

confidence: 99%

A peptide-based fluorescent chemosensor for measuring cadmium ions in aqueous solutions and live cells

Wang

Liu

et al. 2015

Dalton Trans.

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“…Therefore LPFG has a larger sensitivity. But LPFG being very sensitive to optical fiber bending and laying state, the high order cladding mode transmission properties being unstable, and its multi-Peak Value, large bandwidth and the working mode of using the transmission spectrum only to detect limit its measuring precision and multiplexing capability [6] . Currently, the refractive index sensor based on FBG has been reported [7] , but there are no in-depth theoretical analysis, numerical calculations and experiment contrast results.…”

Section: Introductionmentioning

confidence: 99%

FBG Concentration Chemical Sensor with Three Layer Structure

et al. 2014

AMM

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FBG concentration chenical sensor with three layer structure is proposed in this paper. And through experimental study and reasoning calculation to verify the three layer structure of the optical waveguide model, so the sensitivity characteristic of the Bragg wavelength to the refractive index of chemical solution is obtained. And the relationships between the concentration and the shift of Bragg wavelength of sucrose, ethanol, and Nacl solution are achieved. Finally the shifts of the Bragg wavelength with the external concentration are obtained by experiments.

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“…The study of the transmission spectrum of LPFG and behavior of transmission dips with change in various physical parameters broadened the optical fiber field both in communication as well as sensing. LPFG has many applications due to its sensitivity to temperature, strain, bend, refractive index etc [1][2][3][4]. Their resonance wavelengths are very much dependent on the core-cladding differential effective refractive index.…”

Section: Introductionmentioning

confidence: 99%

Core-cladding mode resonances of long period fiber grating in concentration sensor

Akki¹,

Lalasangi²,

Raikar³

et al. 2013

IOSR-JAP

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Long period fiber grating (LPFG) is photoinduced fiber device that facilitates the coupling of core mode to different cladding modes resulting into series of transmission dips in the transmission spectrum. Here we present LPFG chemical sensor to determine the concentration of Manganese in water at ppm level. We fabricated LPFG of period 600µm in single mode communication fiber using 12W carbon dioxide laser applying point by point method. The fabricated LPFG is directly used as chemical sensor since cladding modes coupled to core mode directly come in contact with surrounding chemicals. Concentration of manganese in our collected sample is found to be 0.0329ppm. The result is verified with sophisticated Atomic Absorption Spectrometer (AAS).

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Cd concentration sensor based on fiber grating technology

Cited by 17 publications

References 15 publications

A peptide-based fluorescent chemosensor for measuring cadmium ions in aqueous solutions and live cells

A peptide-based fluorescent chemosensor for measuring cadmium ions in aqueous solutions and live cells

FBG Concentration Chemical Sensor with Three Layer Structure

Core-cladding mode resonances of long period fiber grating in concentration sensor

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