Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.815952
Title: Production and characterisation of phosphorene nanoribbons
Author: Watts, Mitchell C.
ISNI:       0000 0004 9359 1427
Awarding Body: UCL (University College London)
Current Institution: University College London (University of London)
Date of Award: 2020
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Abstract:
Phosphorene is a mono-elemental two-dimensional (2D) material with highly anisotropic and tunable properties. Phosphorene nanoribbons (PNRs) present opportunities for additional control over the properties of phosphorene such as electronic & optical band structure and mobilities, as well as the emergence of novel phenomena for applications. Discrete PNRs have previously not been produced. Here a method of production of PNRs is presented by ionic scissoring of macroscopic black phosphorus (BP) crystals. This scalable and top-down method results in stable solutions of PNRs with typical widths of 4-50 nm, predominantly single layer thicknesses, and lengths up to 75 μm and aspect ratios of up to 1000. The PNRs are atomically flat single crystals exclusively aligned in the zigzag (ZZ) crystallographic direction, have uniform width and extreme flexibility. In this thesis, the production methods for PNRs are fully characterised at each stage, as well as a stability study which suggests improved stability v phosphorene sheets. A mechanism is suggested and future experiments are outlined which will allow finer control over the properties of PNRs. This work forms the basis of the current PNR experimental literature and will guide future PNR researchers to create high-quality PNRs and explore their exciting predicted properties and applications.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.815952  DOI: Not available
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