Bioconjugated gold nanoparticles as an efficient colorimetric sensor for cancer diagnostics

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Analytical Chemistry

Background:

• Early cancer detection significantly improves treatment outcomes and reduces adverse effects.
• Colorimetric sensor techniques offer a promising approach for sensitive cancer detection.
• These methods rely on simple visual color changes, avoiding complex and expensive instrumentation.

Purpose of the Study:

• To provide a technical overview of reported studies on invitro colorimetric cancer detection.
• To highlight the principles and potential of gold nanoparticle-based colorimetric sensors.
• To emphasize the importance of understanding these techniques for commercial viability.

Main Methods:

• Utilizing gold nanoparticles (Au Nps) functionalized with specific biomolecules.
• Exploiting the aggregation or dispersion of Au Nps upon interaction with target cancer analytes.
• Observing visual color changes (red to blue or blue to red) for detection.

Main Results:

• Functionalized Au Nps enable sensitive detection of cancer biomarkers.
• The interaction leads to measurable changes in nanoparticle aggregation/dispersion.
• Visual color shifts indicate the presence of the target analyte, allowing for naked-eye detection.

Conclusions:

• Colorimetric sensors based on Au Nps offer a facile and visually detectable method for invitro cancer detection.
• The high sensitivity and low cost present significant commercial potential.
• Further understanding of these techniques is essential for advancing cancer diagnostics.