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Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates

Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates

Published on: March 20, 2015

Frequency shifts in SERS for biosensing.

Kiang Wei Kho¹, U S Dinish, Anil Kumar

¹The Blackett Laboratory, Imperial College London, Prince Consort Road, London, UK.

|May 31, 2012

Summary

This summary is machine-generated.

Antibody-conjugated SERS reporters act as nanomechanical sensors, shifting frequency with antigen concentration. This novel biodetection method offers high sensitivity and potential for label-free protein nanoarrays.

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Area of Science:

Nanotechnology
Biochemistry
Analytical Chemistry

Background:

Surface-Enhanced Raman Spectroscopy (SERS) is a powerful technique for molecular detection.
Antibody-antigen interactions are crucial in biological recognition and diagnostics.
Developing sensitive and specific biodetection methods is essential for medical and research applications.

Purpose of the Study:

To investigate the potential of antibody-conjugated SERS-active reporters as nanomechanical sensors.
To demonstrate quantitative correlation between antigen concentration and SERS frequency shifts.
To explore multiplexed biodetection using multiple SERS reporters.

Main Methods:

Conjugating SERS-active reporter molecules with antibodies.
Exposing the antibody-conjugated reporters to varying concentrations of target antigens.
Analyzing vibrational frequency shifts of SERS reporters using spectroscopy.
Conducting proof-of-concept studies for multiplexed detection.

Main Results:

Observed quantitative correlation between antigen concentration and SERS frequency shifts.
Attributed frequency shifts to mechanical forces from antibody-antigen interactions.
Achieved detection sensitivity comparable to conventional sandwich immunoassays with a single antibody.
Demonstrated feasibility of multiplexed detection using multiple SERS reporters.

Conclusions:

Antibody-conjugated SERS reporters function as effective nanomechanical sensors for biodetection.
This approach offers high sensitivity and potential for label-free detection.
The technology could lead to high-density protein nanoarrays for advanced diagnostics.