Gold nanoparticle-based colorimetric biosensors

Aldewachi, H. and Chalati, T. and Woodroofe, M. N. and Bricklebank, N. and Sharrack, B. and Gardiner, P. H. (2018) Gold nanoparticle-based colorimetric biosensors. Nanoscale . ISSN 2040-3364

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Item Type:Review
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Abstract

Gold nanoparticles (AuNPs) provide excellent platforms for the development of colorimetric biosensors as they can be easily functionalized, and display different colours depending on their size, shape and state of aggregation. In the last decade, a variety of biosensors have been developed that exploit the extent of colour changes as nanoparticles (NPs) either aggregate or disperse, in the presence of analytes. Of critical importance to the design of these methods is that the behaviour of the systems has to be reproducible and predictable. Much has been accomplished in understanding the interactions between a variety of substrates and AuNPs, and how these interactions can be harnessed as colorimetric reporters in biosensors. However, despite these developments, only a few biosensors have been used in practice for the detection of analytes in biological samples. The transition from proof-of-concept to market biosensors requires extensive long-term reliability and shelf life testing, and modification of protocols and design features to make them safe and easy to use by the population at large. Developments in the next decade will see the adoption of user friendly biosensors for point-of-care and medical diagnosis as innovations are brought to bear in improving the analytical performances and usability of the current designs. This review discusses the mechanisms, strategies, recent advances and perspectives for the use of AuNPs as colorimetric biosensors.

Keywords:biosensors, colloids, gold nanoparticles, nanotechnology, surface plasmon resonance, enzymes, quantification
Subjects:A Medicine and Dentistry > A100 Pre-clinical Medicine
C Biological Sciences > C570 Serology
J Technologies > J700 Industrial Biotechnology
Divisions:College of Science > School of Pharmacy
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ID Code:29790
Deposited On:28 Nov 2017 15:38

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