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Localized surface plasmon resonance-based label-free biosensor for highly sensitive detection of dopamine
Journal of Nanoscience and Nanotechnology
|May 5, 2015
Summary
This study introduces a novel sensor for detecting dopamine (DA), a neurotransmitter linked to neural diseases. The sensor utilizes localized surface plasmon resonance (LSPR) on gold nanoparticles for sensitive and direct detection of low DA concentrations.
Area of Science:
- Nanotechnology
- Biosensing
- Neurochemistry
Background:
- Localized surface plasmon resonance (LSPR) on noble metal nanoparticles (NPs) enables sensitive detection of biomaterials.
- Dopamine (DA), a key neurotransmitter, is difficult to detect at low concentrations, hindering diagnosis of related neural diseases.
Purpose of the Study:
- To develop a sensitive and direct sensor for detecting dopamine (DA) using the LSPR phenomenon.
- To investigate the feasibility of using gold nanoparticles (Au NPs) on ITO substrates for DA detection.
Main Methods:
- Fabrication of LSPR substrates by electrochemical deposition of Au NPs onto ITO glasses.
- Immobilization of antibodies on LSPR substrates.
- Detection of varying DA concentrations via LSPR peak intensity changes.
Main Results:
- The fabricated LSPR substrates exhibited characteristic optical properties.
- A linear increase in LSPR peak intensity was observed with increasing concentrations of deposited DA.
- The proposed sensor demonstrated sensitive detection capabilities for DA.
Conclusions:
- The developed LSPR sensor shows promise for sensitive and direct detection of dopamine.
- This technology could be applied in clinical diagnostics for diseases associated with small molecules like DA.
- Further research can explore its application in various clinical trials.
