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Label-Free Biosensor Imaging on Photonic Crystal Surfaces
Yue Zhuo1, Brian T Cunningham2,3
1Department of Bioengineering, University of Illinois at Urbana-Champaign, Champaign, IL 61822, USA. yuezhuo2@illinois.edu.
Sensors (Basel, Switzerland)
|September 8, 2015
Summary
We review Photonic Crystal Enhanced Microscopy (PCEM), a novel optical microscopy technique. PCEM enables label-free monitoring of biomaterial interactions on surfaces with high sensitivity and resolution.
Area of Science:
- Biophysics
- Materials Science
- Optical Microscopy
Background:
- Traditional microscopy often requires labeling, which can affect biological processes.
- Monitoring biomaterial interactions at the nanoscale is crucial for understanding cellular behavior.
Purpose of the Study:
- To review the development and application of Photonic Crystal Enhanced Microscopy (PCEM).
- To highlight PCEM's capability for label-free, quantitative, and kinetic monitoring of biomaterial-surface interactions.
Main Methods:
- Utilizes nanostructured photonic crystal surfaces coupled with hyperspectral reflectance imaging.
- Detects dielectric nanoparticles, plasmonic nanoparticles, biomolecular layers, and live cells.
Main Results:
- PCEM offers label-free, quantitative, and kinetic monitoring of biomaterial interactions.
- Demonstrates sensitivity to nanoscale events relevant to cell adhesion, differentiation, and diagnostics.
- Capable of detecting nanoparticle contrast agents with single-molecule sensing resolution.
Conclusions:
- PCEM represents a significant advancement in optical microscopy for studying biomaterial interactions.
- Its label-free nature is ideal for long-term cell monitoring and sensitive diagnostics.
- Future applications include stem cell research, chemotaxis, metastasis studies, and digital diagnostics.
