Related Experiment Video
Updated: Mar 7, 2026
05:18
A Rapid and Chemical-free Hemoglobin Assay with Photothermal Angular Light Scattering
Published on: December 7, 2016
10.2K
Aza-heterocyclic Receptors for Direct Electron Transfer Hemoglobin Biosensor.
Vinay Kumar1,2, D M Nikhila Kashyap2, Suraj Hebbar2
1Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore-560012, India.
Scientific Reports
|February 8, 2017
Summary
We developed a cost-effective electrochemical biosensor for hemoglobin (Hb) detection. This novel sensor utilizes aza-heterocyclic receptors for direct electron transfer, enabling rapid, sensitive, and point-of-care Hb measurements.
Area of Science:
- Electrochemistry
- Biosensor Technology
- Biomedical Diagnostics
Background:
- Direct Electron Transfer (DET) biosensors offer advantages over mediator-based systems by enabling direct biomolecule-electrode communication.
- Hemoglobin (Hb) detection is challenging due to inaccessible iron centers and dimer formation, hindering direct electron transfer.
- Existing methods for Hb detection often lack the sensitivity, cost-effectiveness, or point-of-care accessibility required for widespread clinical use.
Purpose of the Study:
- To develop a cost-effective, highly sensitive, and simple electrochemical biosensor for direct hemoglobin detection.
- To overcome limitations in direct electron transfer for hemoglobin sensing using aza-heterocyclic receptors.
- To demonstrate a point-of-care (POC) diagnostic platform for rapid hemoglobin quantification.
Main Methods:
- Electrochemical detection of hemoglobin using cyclic voltammetry and chronoamperometry.
- Utilizing aza-heterocyclic receptors (pyridine and imidazole) to facilitate direct electron transfer with hemoglobin's iron centers.
- Employing screen-printed carbon electrodes with either liquid micro-droplets or dry-chemistry paper membranes for receptor integration.
Main Results:
- Achieved a cost-effective, highly sensitive, and simple electrochemical hemoglobin sensor.
- Demonstrated excellent linearity and robustness against interference in clinical samples.
- Validated a point-of-care technology using disposable test strips and a handheld reader for results in under a minute.
Conclusions:
- A novel electrochemical approach using aza-heterocyclic receptors enables direct and sensitive hemoglobin detection.
- The developed sensor platform is suitable for point-of-care applications, offering rapid and reliable results from finger-prick blood samples.
- This technology presents a significant advancement for accessible and efficient hemoglobin monitoring in clinical settings.
