Recent advances in nanoparticle based aptasensors for food contaminants.

Richa, Sharma and Ragavan, K. V. and Thakur, M. S. and Raghavarao, K. S. M. S. (2015) Recent advances in nanoparticle based aptasensors for food contaminants. Biosensors and Bioelectronics, 74. pp. 612-627. ISSN 0956-5663

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Abstract

Food safety and hazard analysis is a prime concern of human life, thus quality assessment of food and water is the need of the day. Recent advances in nano-biotechnology play a significant role in providing possible solutions for developing highly sensitive and affordable detection tools for food analysis. Nanomaterials based aptasensors hold great potential to overcome the drawbacks of conventional analytical techniques. Aptamers comprise a novel class of highly specific bio-recognition elements which are produced by SELEX (systematic evolution of ligands by exponential enrichment) process. They bind to target molecules by folding into 3D structures that can discriminate different chiral compounds. The flexibility in making modifications in aptamers contribute to the design of biosensors, enabling the generation of bio-recognition elements for a wide variety of target molecules. Nanomaterials such as metal nanoparticles, metal nanoclusters, metal oxide nanoparticles, metal and carbon quantum dots, graphene, carbon nanotubes and nanocomposites enable higher sensitivity by signal amplification and introduce several novel transduction principles such as enhanced chemiluminescence, fluorescence, Raman signals, electrochemical signals, enhanced catalytic activity, and super-paramagnetic properties to the biosensor. Although there are a few reviews published recently which deal with the potential of aptamers in various fields, none are devoted exclusively to the potential of aptasensors based on nanomaterials for the analysis of food contaminants. Hence, the current review discusses several transduction systems and their principles used in aptamer based nanosensors which have been developed in the past five years, the challenges faced in their designing, along with their strengths and limitations.

Item Type:	Article
Uncontrolled Keywords:	Aptamers Nanoparticles Food contaminants Biosensors Food safety
Subjects:	600 Technology > 05 Chemical engineering > 01 Biotechnology and Bioengineering 600 Technology > 08 Food technology > 13 Quality control > 02 Safety
Divisions:	Food Engineering
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	31 May 2019 04:31
Last Modified:	31 May 2019 04:31
URI:	http://ir.cftri.res.in/id/eprint/14097

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