Citation: Bharathi Natarajan, Palanisamy Kannan, Longhua Guo. Metallic nanoparticles for visual sensing: Design, mechanism, and application[J]. Chinese Journal of Structural Chemistry, ;2024, 43(9): 100349. doi: 10.1016/j.cjsc.2024.100349 shu

Metallic nanoparticles for visual sensing: Design, mechanism, and application

Fascinating physico-chemical features of functionalized metallic nanoparticles (MNPs), which offer a high surface-to-volume ratio, biocompatibility, and flexible functionalities, are considered as potential building blocks in functionalized nano/biointerface, facilitating stable biosensing detection response towards various biological analytes. MNPs-based colorimetric biosensors have received enormous attention in chemistry, biology, and medicine owing to their simplicity, practicality, low-cost, high stability, and selectivity. Principally, the colorimetric biosensing is low-cost; it does not require advanced analytical instruments because the change in color of nanoparticle dispersion can be directly read out via the naked-eye, which is indeed used for on-field analysis and point-of-care (POC) analyses. Notably, MNPs such as gold, silver, iron oxide, and cerium oxide have been used for the simple and facile colorimetric detection of biologically important analytes via changes in various colors. In this review, the biosensing mechanism is based on the change in colors of MNPs toward the detection of clinically important biomolecules (glucose, ochratoxin A (OTA), etc.), deoxyribonucleic acid (DNA), prostate-specific antigen (PSA), α-fetoprotein (AFP), lipopolysaccharide (LPS), carcinoembryonic antigen (CEA), and proteins in various real samples. This promising discipline, at the interface of nanomaterials and biosciences, offers extensive projections for interdisciplinary researchers that comprise nanomaterial preparation, bio-element functionalization, and targeted detection in clinical diagnostics. The potential approaches for new colorimetric substrate design, important biosensing characteristics, challenges, and future opportunities for colorimetric biosensing strategies are also described.
- Metallic nanoparticles,
- Surface plasmon,
- Biomolecules,
- Real sample testing,
- Point-of-care
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沈阳化工大学材料科学与工程学院沈阳 110142