Precious metal nanoprobes based on DNA modification: design, function and their application in biosensing

Area of Science:

• Nanomaterials Science
• Biotechnology
• Analytical Chemistry

Background:

• Precious metal nanomaterials (PMNMs) exhibit limitations including aggregation, monofunctionality, and potential toxicity, restricting their biosensing applications.
• DNA's unique properties—sequence programmability, biocompatibility, and multifunctional integration—offer a solution to enhance PMNM capabilities.

Purpose of the Study:

• To review the research on DNA-modified precious metal nanomaterials (PMNMs) for biosensing applications.
• To elucidate the mechanisms of DNA binding to PMNMs and the diverse roles of DNA in nanoprobes.
• To discuss the application of these nanoprobes across various biosensing techniques and future prospects.

Main Methods:

• Review of existing literature on DNA-PMNM interactions and their application in biosensing.
• Analysis of DNA's roles: synthetic templates, property modulation, signal amplification, and target recognition.
• Discussion of biosensing platforms including colorimetric, fluorescence, SERS, and electrochemical methods.

Main Results:

• Detailed mechanisms of DNA binding to various PMNMs are presented.
• DNA's multifaceted roles in DNA-modified precious metal nanoprobes (PMNPs) are elucidated.
• Successful applications of PMNPs in diverse biosensing modalities are highlighted.

Conclusions:

• DNA modification significantly enhances the utility of PMNMs in biosensing, overcoming inherent limitations.
• DNA-modified PMNPs offer versatile platforms for sensitive and specific biomolecule detection.
• Future research should focus on optimizing designs and exploring new applications for these advanced nanoprobes.