Rayleigh and Raman Scattering Spectroscopy of Individual Extreme Nanowires

Lead Research Organisation: University of Southampton
Department Name: School of Physics and Astronomy

Abstract

Extreme nanowires are arguably the smallest possible periodic materials. Typically they are defined as wires with diameters of less than 5 nm, and they express behaviours not easily comparable to their larger counterparts. Filling carbon nanotubes allows the creation of extreme nanowires inside the CNTs that would otherwise be chemically and physically unstable. This method can produce nanowires with cross sections as small as single atom. The aim of this project is to determine the electronic structure and vibrational modes of individual extreme nanowires of known physical structure. This will be achieved by developing a system for performing Rayleigh and Resonance Raman spectroscopy on individual suspended and filled CNTs which will also be imaged by high resolution TEM.

Publications

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Studentship Projects

Project Reference Relationship Related To Start End Student Name
EP/N509747/1 01/10/2016 30/09/2021
1953806 Studentship EP/N509747/1 28/09/2017 31/03/2021 Jacob Viner
 
Description During my PhD I have been studying TMDC heterostructures - these are 3 atom thick semiconductors. I have used Raman spectroscopy to examine the excitons in monolayers and bilayers of these materials. I have investigated how it is possible to couple these excitons with vibrational modes of a material called hexagonal boron nitride (hBN) commonly used in TMDC devices.
Exploitation Route This research was applicable to photodetectors and other photonic devices based on these materials.
Sectors Electronics,Energy