Related Experiment Video
Updated: Apr 12, 2026
Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates
Published on: March 20, 2015
Enabling Rapid and Specific Surface-Enhanced Raman Scattering Immunoassay Using Nanoscaled Surface Shear Forces.
Yuling Wang1, Ramanathan Vaidyanathan1, Muhammad J A Shiddiky1
1†Centre for Personalized Nanomedicine, Australian Institute for Bioengineering and Nanotechnology (AIBN), Corner College and Cooper Roads (Bldg 75), and ‡School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane QLD 4072, Australia.
This study introduces a novel surface-enhanced Raman scattering (SERS) immunoassay using gold/silver nanoshells and electrohydrodynamics. This rapid method enhances detection sensitivity and specificity for breast cancer biomarkers.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Analytical Chemistry
Background:
- Surface-enhanced Raman scattering (SERS) immunoassays face challenges with nonspecific adsorption and long assay times.
- Efficient capture kinetics are crucial for sensitive and rapid immunoassay development.
Purpose of the Study:
- To develop a rapid and sensitive SERS immunoassay by addressing nonspecific adsorption and reducing assay duration.
- To utilize novel SERS nanotags and physical forces for enhanced immunoassay performance.
Main Methods:
- Integration of fluorophore-conjugated gold/silver nanoshells as SERS nanotags.
- Application of alternative current electrohydrodynamics (ac-EHD) to generate nanoscaled surface shear forces.
- Validation of assay performance against conventional methods and hydrodynamic flow.
Main Results:
- Achieved rapid assay time of 40 minutes.
- Demonstrated high sensitivity with a detection limit of 10 fg/mL.
- Showcased high specificity in detecting human epidermal growth factor receptor 2 (HER2) in breast cancer patient samples.
Conclusions:
- The developed approach effectively overcomes limitations in SERS immunoassays.
- Nanoscaled physical forces significantly enhance capture kinetics for rapid and sensitive detection.
- This method holds promise for routine clinical diagnosis of breast cancer through SERS immunoassays.
