• Toimil-Molares, Maria Eugenia
• Schubert, Ina
• Trautmann, Christina
• Burr, Loic

Abstract

<jats:p><jats:bold>Background:</jats:bold> Multicomponent heterostructure nanowires and nanogaps are of great interest for applications in sensorics. Pulsed electrodeposition in ion-track etched polymer templates is a suitable method to synthesise segmented nanowires with segments consisting of two different types of materials. For a well-controlled synthesis process, detailed analysis of the deposition parameters and the size-distribution of the segmented wires is crucial.</jats:p><jats:p><jats:bold>Results:</jats:bold> The fabrication of electrodeposited AuAg alloy nanowires and segmented Au-rich/Ag-rich/Au-rich nanowires with controlled composition and segment length in ion-track etched polymer templates was developed. Detailed analysis by cyclic voltammetry in ion-track membranes, energy-dispersive X-ray spectroscopy and scanning electron microscopy was performed to determine the dependency between the chosen potential and the segment composition. Additionally, we have dissolved the middle Ag-rich segments in order to create small nanogaps with controlled gap sizes. Annealing of the created structures allows us to influence their morphology.</jats:p><jats:p><jats:bold>Conclusion:</jats:bold> AuAg alloy nanowires, segmented wires and nanogaps with controlled composition and size can be synthesised by electrodeposition in membranes, and are ideal model systems for investigation of surface plasmons.</jats:p>

Topics

• impedance spectroscopy
• surface
• polymer
• scanning electron microscopy
• annealing
• Energy-dispersive X-ray spectroscopy
• electrodeposition
• wire
• cyclic voltammetry