Prospects of Nanobiomaterials for Biosensing

Singh, Ravindra Pratap

doi:10.4061/2011/125487

Cited by 70 publications

(27 citation statements)

References 323 publications

(304 reference statements)

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“…Current developments in nanotechnology, particularly the capability to synthesise highly methodical nanomaterials of any shape and size, have led to the production of innovative materials. The characters of metal and metal oxide nanomaterials have been of great interest due to their distinctive feature such as catalytic activity, optical, magnetic and electrical properties [4][5][6][7][8][9]. Nanoparticles coordination with biological entities (e.g., microorganisms) has created a succession of nanoparticle-biological interfaces that depend on both colloidal forces and dynamic biophysicochemical interactions [2,5,6].…”

Section: Introductionmentioning

confidence: 99%

Green synthesis of Cu/Cu2O/CuO nanostructures and the analysis of their electrochemical properties

Fuku¹,

Modibedi²,

Mathe³

2020

SN Appl. Sci.

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Heterogeneous Cu/Cu 2 O/CuO nanoparticles were synthesised via polyphenols of pomegranate for various application. X-ray diffraction and high resolution-scanning electron microscopy confirmed Cu/Cu 2 O/CuO NPs crystallinity and the particle size which ranged from 5 to 20 nm. The electrochemical band gap energies of Cu/Cu 2 O/CuO NPs were calculated to be between 0.9 and 2.1 eV. EIS measurements were used to calculate the capacitance and specific capacitance of the nanoparticles which were found to be 11.2 F and 69 F g −1 . Surface diffusion coefficient obtained from cyclic voltammetry was found to be 1.54 × 10 −6 cm 2 s −1 with r 2 of 0.99 suggesting a fast electron movement. The calculated surface coverage was 1.38 × 10 −3 mol cm −2 suggesting the formation of monolayer at the electrode interface. The results confirmed the electroactivity of Cu/Cu 2 O/CuO electrode towards the volatile organic compound-ethanol. Cu/Cu 2 O/CuO exhibited good electrochemical performance towards ethanol with higher current density and most negative onset potential − 0.3 V, meaning that it requires lower energy for ethanol activity to occur at the electrode interface. EIS profiles confirmed the kinetics of Cu/Cu 2 O/CuO at the electrode surface with characteristic small circular curvature signifying that the polarisation resistance (R p ) is prominent, proposing a faster electron shuttling process for ethanol activity. Further, the amperometric response with long time test for the Cu/Cu 2 O/CuO based electrode system estimated a lower limit of detection to be 0.09 µM at a signal to noise ratio of 3 with sensitivity of 0.049 µA µM −1 at steady state. Raman and FTIR highlighted mechanism of coordination.

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Section: Introductionmentioning

confidence: 99%

Green synthesis of Cu/Cu2O/CuO nanostructures and the analysis of their electrochemical properties

Fuku¹,

Modibedi²,

Mathe³

2020

SN Appl. Sci.

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“…Nanotechnology is playing an important role in the development of efficient biosensors for the pesticide detection [148][149][150]. Different types of nanomaterials (e.g.…”

Section: Resultsmentioning

confidence: 99%

“…The emerging synergy between nanotechnology and sensors has been exploited over the past few years [148][149][150]. Intensive research efforts have been performed for the design of efficient nanomaterial-based biosensors that exhibit high sensitivity and stability.…”

Section: Nanomaterialsmentioning

confidence: 99%

Biosensors for Pesticide Detection: New Trends

Sassolas¹,

Prieto‐Simón²,

Marty³

2012

AJAC

186

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Due to the large amounts of pesticides commonly used and their impact on health, prompt and accurate pesticide analysis is important. This review gives an overview of recent advances and new trends in biosensors for pesticide detection. Optical, electrochemical and piezoelectric biosensors have been reported based on the detection method. In this review biosensors have been classified according to the immobilized biorecognition element: enzymes, cells, antibodies and, more rarely, DNA. The use of tailor-designed biomolecules, such as aptamers and molecularly imprinted polymers, is reviewed. Artificial Neural Networks, that allow the analysis of pesticide mixtures are also presented. Recent advances in the field of nanomaterials merit special mention. The incorporation of nanomaterials provides highly sensitive sensing devices allowing the efficient detection of pesticides

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“…Existing diagnostic methods are limited and paralyzed due to limitations associated with restricted/accurate experimental determination, economic and infrastructural barriers. Also, traditional (biopsy, histolytic etc) and current methods (RIA, ELISA, MS-MS) are limited in terms of cost, time lapse, availability of trained personnel and false positive/negatives [4]. It is evident that a comprehensive approach is needed through integration of potential nano materials with novel biomarkers expressed in body fluids.…”

Section: Introductionmentioning

confidence: 99%