Single nanoskived nanowires for electrochemical applications

Area of Science:

• Nanotechnology
• Materials Science
• Electrochemistry

Background:

• Controlled fabrication of nanostructures is crucial for advanced electronic and electrochemical devices.
• Nanoskiving offers a facile method for producing high-aspect-ratio nanostructures.
• Gold nanowires are promising for electrochemical sensing due to their conductivity and biocompatibility.

Purpose of the Study:

• To fabricate gold nanowires with controlled dimensions using nanoskiving.
• To characterize the electrical and electrochemical properties of the fabricated gold nanowires.
• To evaluate the potential of these nanowires for electrochemical sensing applications.

Main Methods:

• Fabrication of gold nanowires using the nanoskiving technique.
• Electrical characterization including resistance measurements and Ohmic response assessment.
• Electrochemical characterization using cyclic voltammetry with ferrocenemonocarboxylic acid and hydrogen peroxide reduction studies.

Main Results:

• Successfully fabricated gold nanowires with controlled dimensions and lengths up to hundreds of micrometers.
• Observed low electrical resistances and linear Ohmic responses in packaged nanowire devices.
• Demonstrated scan rate independence up to 1000 mV/s and fast heterogeneous electron transfer kinetics (k(0) = 2.27 cm/s, α = 0.4).
• Achieved direct reduction of hydrogen peroxide over a wide concentration range (110 pM to 1 mM) without surface modification.

Conclusions:

• Nanoskiving is an effective method for fabricating high-quality gold nanowires for device applications.
• The fabricated gold nanowires exhibit excellent electrical and electrochemical properties, including fast electron transfer kinetics.
• These gold nanowires show significant promise for sensitive and label-free electrochemical sensing, particularly for hydrogen peroxide detection.