Related Experiment Video
Updated: Aug 1, 2025
13:15
Fabrication of Electrochemical-DNA Biosensors for the Reagentless Detection of Nucleic Acids, Proteins and Small Molecules
Published on: June 1, 2011
33.6K
DNA-Templated Silver Nanoclusters as Dual-Mode Sensitive Probes for Self-Powered Biosensor Fueled by Glucose
Akhilesh Kumar Gupta1, Alexey V Krasnoslobodtsev1
1Department of Physics, University of Nebraska at Omaha, Omaha, NE 68182, USA.
Nanomaterials (Basel, Switzerland)
|April 28, 2023
Summary
This study introduces a novel dual-mode biosensor using DNA-templated silver nanoclusters for glucose detection. The self-powered device offers improved sensitivity and specificity for advanced biosensing applications.
Area of Science:
- Nanomaterials Science
- Biosensor Technology
- Analytical Chemistry
Background:
- Nanomaterials offer unique properties for enhanced sensor performance.
- DNA-templated silver nanoclusters (AgNCs@DNA) possess advantageous optical characteristics.
- Existing biosensors require improvements in sensitivity and specificity.
Purpose of the Study:
- To develop a dual-mode, self-powered biosensor for advanced biosensing.
- To utilize DNA-templated silver nanoclusters (AgNCs@DNA) as a fluorescent and electrochemical probe.
- To detect glucose with high sensitivity and specificity.
Main Methods:
- Construction of a fluorescent/electrochemical dual-mode self-powered biosensor.
- Utilizing AgNCs@DNA as an optical probe for glucose detection via fluorescence.
- Employing AgNCs as electrochemical charge mediators for glucose detection.
- Investigating glucose oxidase (GOx) enzyme activity for signal generation.
Main Results:
- The biosensor demonstrated effective glucose detection using both fluorescence and electrochemical readouts.
- Low limits of detection (LODs) were achieved: ~23 μM (optical) and ~29 μM (electrochemical).
- Detected LODs are significantly lower than physiological glucose concentrations in body fluids.
Conclusions:
- The developed dual-mode biosensor offers a reliable platform for advanced biosensing.
- The self-powered design and dual readout strategies present new prospects for next-generation biosensor devices.
- AgNCs@DNA show promise as versatile probes in biosensor development.
