Related Experiment Video
Updated: Aug 25, 2025
Fully Automated Centrifugal Microfluidic Device for Ultrasensitive Protein Detection from Whole Blood
Published on: April 16, 2016
Localized hydrodynamic flow confinement assisted nanowire sensor for ultrasensitive protein detection
Haifeng Lin1, Nahoko Kasai2, Ning Xu3
1Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, Minamiohsawa, Hachioji, Tokyo, 192-0397, Japan; Department of Chemistry, Beijing Key Laboratory of Microanalytical Methods and Instrumentation, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing, 100084, China.
A new, low-cost method for fabricating nanowire sensors (NWS) enables ultra-sensitive protein detection. This accessible technique uses simple equipment, improving biomarker detection in resource-limited settings.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Biosensing
Background:
- Ultra-sensitive biomarker detection is crucial for healthcare, especially in resource-constrained regions.
- Current nanowire sensor (NWS) fabrication relies on expensive, complex equipment, limiting accessibility.
- There is a need for affordable and simple methods for NWS fabrication.
Purpose of the Study:
- To develop an accessible and low-cost methodology for fabricating nanowire biosensors.
- To achieve ultra-sensitive protein detection using the developed fabrication method.
- To demonstrate the potential of this method for improving biomarker detection in resource-limited environments.
Main Methods:
- Localized hydrodynamic flow confinement was employed for NWS fabrication.
- A microchemical pen (MCP) and an X-Y positioner were used for tunable chemical deposition.
- The fabrication process avoided the need for expensive and specialized equipment.
Main Results:
- The developed NWS achieved ultra-sensitive detection of IgA and IgG biomarkers.
- Limits of detection (LOD) were 0.089 fg/mL for IgA and 0.93 fg/mL for IgG.
- The sensitivity demonstrated a 10-fold improvement compared to previously published NWS.
Conclusions:
- A simple, accessible, and cost-effective nanowire biosensor fabrication method was successfully developed.
- This approach significantly enhances protein detection sensitivity, making it suitable for resource-limited settings.
- The developed NWS technology holds promise for broader applications in biomarker detection and other sensing fields.
