Reflection spectroscopy for the determination of Au nanostructure formation on carbon surfaces

► Reflectance spectroscopy of electrodeposited Au nanoparticles is monitored on chips. ► Impedance spectroscopy and cyclic voltammetry were used to characterize the chips. ► Novel surface modifications enable simultaneous dual-transduction capabilities. Au electrodeposition has been performed on car...

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Bibliographic Details
Published in:Talanta (Oxford) 2011-10, Vol.86, p.421-424
Main Authors: Cheng, Xin Ran, Veloso, Anthony J., Kerman, Kagan
Format: Article
Language:English
Subjects:
Analytical chemistry
Au nanostructures
Carbon
Chemistry
Chips
Deposition
Electrochemical methods
Electrodeposition
Electrodes
Exact sciences and technology
Gold
Nanostructure
Optical properties
Reflectance spectroscopy
Reflection
Screen-printed chips
Spectrometric and optical methods
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Summary:► Reflectance spectroscopy of electrodeposited Au nanoparticles is monitored on chips. ► Impedance spectroscopy and cyclic voltammetry were used to characterize the chips. ► Novel surface modifications enable simultaneous dual-transduction capabilities. Au electrodeposition has been performed on carbon electrodes to fabricate Au nanostructures on the working electrode of screen-printed carbon chips. The amount of Au deposited was characterized using the raw reflection spectra obtained by detecting UV–Vis spectrum reflected from the electrode surface. SEM images at different deposition time points provided evidence for the growth of Au nanostructures. The increase in deposition time led to an increase in the intensity of the spectrum obtained for both chips. The acquired optical properties of the carbon chips provide a promising platform for simultaneous optical and electrochemical measurements.
ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2011.08.039