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Updated: Jun 24, 2025

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

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Published on: April 18, 2013

High performance Pt-anchored MoS₂based chemiresistive ascorbic acid sensor.

Arpita Biswas¹, Ashok Kumar¹, Amit Kumar¹

¹Department of Electrical Engineering, Indian Institute of Technology Jodhpur, Rajasthan 342030, India.

|June 5, 2024

Summary

A new biosensor using platinum-decorated molybdenum disulfide (Pt-MoS2) offers highly sensitive and selective detection of ascorbic acid (vitamin C). This cost-effective platform demonstrates significant improvements over existing methods for vitamin C measurement.

Keywords:

3D hollow rectangular structure MoS2 ascorbic acid sensor transition metal dichalcogenides

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Area of Science:

Materials Science
Nanotechnology
Biomedical Engineering

Background:

Ascorbic acid (vitamin C) is essential for numerous physiological processes.
Accurate detection of ascorbic acid is critical for various applications.
Existing detection methods often lack selectivity, sensitivity, or economic viability.

Purpose of the Study:

To develop a highly selective, sensitive, and cost-effective biosensor for ascorbic acid detection.
To utilize platinum-decorated molybdenum disulfide (Pt-MoS2) for enhanced biosensing capabilities.

Main Methods:

Synthesis of MoS2 hollow rectangular structures via chemical vapor deposition.
Fabrication of a chemiresistive biosensor using Pt-decorated MoS2.
Characterization using FESEM, energy-dispersive spectroscopy, Raman spectroscopy, and XPS.
Evaluation of sensor response, sensitivity, and selectivity towards ascorbic acid and other biomolecules.

Main Results:

The Pt-MoS2 biosensor exhibited high precision and sensitivity for ascorbic acid detection.
The sensor demonstrated excellent selectivity towards ascorbic acid over other biomolecules.
A response of 125% was observed for 1 mM ascorbic acid, which is 2.2 times higher than pristine MoS2.

Conclusions:

Pt-decorated MoS2 is a promising material for developing efficient ascorbic acid biosensors.
The developed biosensor offers a viable solution for reliable ascorbic acid monitoring.
This advancement supports applications in environmental, biomedical, and industrial fields.