Rayleigh and Raman Scattering Spectroscopy of Individual Extreme Nanowires
Lead Research Organisation:
University of Southampton
Department Name: Sch 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.
Organisations
People |
ORCID iD |
David Smith (Primary Supervisor) | |
Jacob Viner (Student) |
Publications
Xia X
(2021)
Atomic and electronic structure of two-dimensional Mo (1- x )W x S 2 alloys
in Journal of Physics: Materials
Viner J
(2021)
Insights into hyperbolic phonon polaritons in h - BN using Raman scattering from encapsulated transition metal dichalcogenide layers
in Physical Review B
Viner J
(2021)
Excited Rydberg states in MoSe 2 /WSe 2 heterostructures
in 2D Materials
McDonnell L
(2021)
Superposition of intra- and inter-layer excitons in twistronic MoSe 2 /WSe 2 bilayers probed by resonant Raman scattering
in 2D Materials
McDonnell L
(2020)
Observation of intravalley phonon scattering of 2s excitons in MoSe 2 and WSe 2 monolayers
in 2D Materials
Studentship Projects
Project Reference | Relationship | Related To | Start | End | Student Name |
---|---|---|---|---|---|
EP/N509747/1 | 30/09/2016 | 29/09/2021 | |||
1953806 | Studentship | EP/N509747/1 | 30/09/2017 | 29/06/2021 | 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 |