Volumetric Bar-Chart Chips for Biosensing.

Area of Science:

• Biomedical Engineering
• Analytical Chemistry
• Point-of-Care Diagnostics

Background:

• Biomarker quantification is crucial for personalized diagnostics.
• Existing methods often require complex instrumentation and data analysis.
• There is a need for portable, cost-effective, and user-friendly diagnostic tools.

Purpose of the Study:

• To describe the fabrication and application of the volumetric bar-chart chip (V-Chip).
• To demonstrate V-Chip's capability for multiplexed and quantitative biomarker measurement.
• To highlight V-Chip as a potential instrument-free point-of-care diagnostic solution.

Main Methods:

• Fabrication of the microfluidics-based V-Chip device.
• Utilizing volumetric oxygen generation for quantitative readout.
• Employing silica nanoparticles as probe carriers for V-Chip-based ELISA.
• Performing multiplexed biomarker detection.

Main Results:

• V-Chip enables instant visual quantitation of biomarkers through bar charts.
• The device provides quantitative measurements without external instruments or data processing.
• Silica nanoparticles facilitate V-Chip-based ELISA for biomarker detection.
• The V-Chip system is portable and low-cost.

Conclusions:

• The V-Chip represents a significant advancement in point-of-care diagnostics.
• It enables instrument-free, personalized diagnostics with high-throughput capabilities.
• V-Chip technology holds promise for accessible and efficient biomarker analysis.