Issue

Vol. 13 (2021)

Nanozymes in Point-of-Care Diagnosis: An Emerging Futuristic Approach for Biosensing

https://doi.org/10.1007/s40820-021-00717-0
Bhaskar Das
School of Biological Sciences, Queen’s University Belfast, Belfast, UK
Javier Lou Franco
School of Biological Sciences, Queen’s University Belfast, Belfast, UK
Natasha Logan
School of Biological Sciences, Queen’s University Belfast, Belfast, UK
Paramasivan Balasubramanian
Department of Biotechnology and Medical Engineering, National Institute of Technology Rourkela, Rourkela, India
Moon Il Kim
Department of BioNano Technology, Gachon University, Seongnam, Korea
Cuong Cao
School of Biological Sciences, Queen’s University Belfast, Belfast, UK

Corresponding Author: Cuong Cao

c.cao@qub.ac.uk

Nano-Micro Letters, Vol. 13 (2021), Article Number: 193

Abstract

Nanomaterial-based artificial enzymes (or nanozymes) have attracted great attention in the past few years owing to their capability not only to mimic functionality but also to overcome the inherent drawbacks of the natural enzymes. Numerous advantages of nanozymes such as diverse enzyme-mimicking activities, low cost, high stability, robustness, unique surface chemistry, and ease of surface tunability and biocompatibility have allowed their integration in a wide range of biosensing applications. Several metal, metal oxide, metal–organic framework-based nanozymes have been exploited for the development of biosensing systems, which present the potential for point-of-care analysis. To highlight recent progress in the field, in this review, more than 260 research articles are discussed systematically with suitable recent examples, elucidating the role of nanozymes to reinforce, miniaturize, and improve the performance of point-of-care diagnostics addressing the ASSURED (affordable, sensitive, specific, user-friendly, rapid and robust, equipment-free and deliverable to the end user) criteria formulated by World Health Organization. The review reveals that many biosensing strategies such as electrochemical, colorimetric, fluorescent, and immunological sensors required to achieve the ASSURED standards can be implemented by using enzyme-mimicking activities of nanomaterials as signal producing components. However, basic system functionality is still lacking. Since the enzyme-mimicking properties of the nanomaterials are dictated by their size, shape, composition, surface charge, surface chemistry as well as external parameters such as pH or temperature, these factors play a crucial role in the design and function of nanozyme-based point-of-care diagnostics. Therefore, it requires a deliberate exertion to integrate various parameters for truly ASSURED solutions to be realized. This review also discusses possible limitations and research gaps to provide readers a brief scenario of the emerging role of nanozymes in state-of-the-art POC diagnosis system development for futuristic biosensing applications.


Highlights:


1 Enzyme-mimicking activities of different nanomaterials (nanozymes) and the recent progress in the construction of nanozyme-based biosensors with various examples are discussed in this review.
2 Physicochemical properties of nanomaterials (size, composition, pH, temperature, surface chemistry) play crucial role in the nanozyme activities.
3 The emerging nanozyme-based biosensors promise great potential for point-of-care diagnostic applications following the ASSURED criteria defined by WHO.

Keywords

Nanozymes Biosensing Point-of-care diagnosis ASSURED diagnostics Catalytic nanomaterials
Das, Bhaskar, Javier Lou Franco, Natasha Logan, Paramasivan Balasubramanian, Moon Il Kim, and Cuong Cao. 2021. “Nanozymes in Point-of-Care Diagnosis: An Emerging Futuristic Approach for Biosensing”. Nano-Micro Letters 13 (September):193. https://doi.org/10.1007/s40820-021-00717-0.
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