Browsing by Subject "2D materials"
Now showing items 1-20 of 30
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3D MXene Architectures for Efficient Energy Storage and Conversion
(2020)2D transition metal carbides and/or nitrides (MXenes), by virtue of high electrical conductivity, abundant surface functional groups and excellent dispersion in various solvents, are attracting increasing attention and ... -
Adsorption of common solvent molecules on graphene and MoS2 from first-principles
(2018)Solvents are an essential element in the production and processing of two-dimensional (2D) materials. For example, the liquid-phase exfoliation of layered materials requires a solvent to prevent the resulting monolayers ... -
Controlled synthesis of transition metal dichalcogenide thin films for electronic applications
(2014)Two dimensional transition metal dichalcogenides (TMDs) are exciting materials for future applications in nanoelectronics, nanophotonics and sensing. In particular, sulfides and selenides of molybdenum (Mo) and tungsten ... -
Defect-moderated oxidative etching of MoS<inf>2</inf>
(2019)We report a simple technique for the selective etching of bilayer and monolayer MoS 2. In this work, chosen regions of MoS 2 were activated for oxygen adsorption and reaction by the application of low doses of He + at 30 ... -
Dependence of Photocurrent Enhancements in Hybrid Quantum Dot-MoS2 Devices on Quantum Dot Emission Wavelength
(2019)The spectral dependence of nonradiative energy transfer (NRET) from three spectrally different quantum dot (QD) ensembles to monolayer MoS2 is reported. The QDs with peak emission wavelengths of 450, 530, and 630 nm induce ... -
Dependence of Photocurrent Enhancements in Quantum Dot (QD)-Sensitized MoS2 Devices on MoS2 Film Properties
(2018)This report demonstrates highly efficient nonradiative energy transfer (NRET) from alloyed CdSeS/ZnS semiconductor nanocrystal quantum dots (QDs) to MoS2 films of varying layer thicknesses, including pristine monolayers, ... -
Environmental effects on the electrical characteristics of back-gated WSe2 field-effect transistors
(2018)We study the effect of polymer coating, pressure, temperature, and light on the electrical characteristics of monolayer WSe2 back-gated transistors with Ni/Au contacts. Our investigation shows that the removal of a layer ... -
Exploring the Diverse Landscape of Layered Double Hydroxide-Based Nanomaterials
(Trinity College Dublin. School of Chemistry. Discipline of ChemistryTrinity College Dublin, School of Chemistry, 2024)This thesis details the synthesis, characterisation, and an exploration of the diverse application landscape of layered double hydroxide (LDH)-based nanomaterials. The aim is to showcase the potential of LDHs in chirality ... -
Highly Selective Non-Covalent On-Chip Functionalization of Layered Materials
(2021)Non-covalent functionalization of layered 2D materials is an essential tool to modify and fully harness their optical, electrical, and chemical properties. Herein, a facile method enabling the selective formation of ... -
Influence of graphene oxide/Ag nanoparticle composites on the fluorescence properties of organic dyes
(2017)Graphene oxide/Ag nanoparticle (AgGO) composite materials have been proposed for surface enhanced Raman scattering (SERS) detection of fluorescent dye molecules. In this study we examine the role of the different components ... -
Interfacing 2D VS2 with Janus MoSSe: Antiferromagnetic electric polarization and charge transfer driven Half-metallicity
(2021)Half metallic 2D materials with 100% spin polarization at the fermi level can be applied to spintronics to enhance the device efficiency. We identified that the Janus MoSSe monolayer can induce halfmetallicity in the VS2 ... -
Investigation of growth-induced strain in monolayer MoS2 grown by chemical vapor deposition
(2020)Two-dimensional materials such as transitional metal dichalcogenides exhibit unique optical and electrical properties. Here we report on the varying optical properties of CVD grown MoS2 monolayer flakes with different ... -
Liquid Phase Exfoliation of 2D Materials under Ambient Conditions
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)A technique developed by the Coleman group in 2008 called liquid phase exfoliation (LPE) has been shown to be effective for the delamination of any material exhibiting a layered structure. Molybdenum dioxide ... -
Liquid-Phase Exfoliation of Nonlayered Non-Van-Der-Waals Crystals into Nanoplatelets
(2023)For nearly 15 years, researchers have been using liquid-phase exfoliation (LPE) to produce 2D nanosheets from layered crystals. This has yielded multiple 2D materials in a solution-processable form whose utility has been ... -
Mechanisms of Liquid Phase Exfoliation for the Production of Graphene
(2020)Liquid- phase exfoliation (LPE) is the principal method of producing two-dimensional (2D) materials such as graphene in large quantities with a good balance between quality and cost and is now widely adopted by both the ... -
Nanoelectromechanical sensors based on suspended 2D materials
(2020)The unique properties and atomic thickness of two-dimensional (2D) materials enable smaller and better nanoelectromechanical sensors with novel functionalities. During the last decade, many studies have successfully shown ... -
Nonradiative Energy Transfer and Photocurrent Enhancements in Hybrid Quantum Dot-MoS<inf>2</inf> Devices
(2018)The energy transfer mechanism leading to highly efficient nonradiative energy transfer (NRET) from quantum dots (QDs) to monolayer MoS 2 devices has been investigated via a spectral dependence study. The spectral dependence ...