Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Liquid phase exfoliation"”.
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On the fundamental mechanisms & optimisation of ultrasonic assisted liquid phase exfoliation of two dimensional nanomaterials
… of ultrasound and acoustic cavitation in liquid exfoliation of bulk layered materials is a widely used method. Ultrasonic assisted liquid phase exfoliation (ULPE) is a promising procedure for the large scale production of two dimensional (2D) materials. As of this date, toxic solvents such …
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Advances in Phenyl-Modified Carbon Nitride: Towards Sustainable Environmental Applications
… study investigates changes in PhCN induced by liquid phase exfoliation, co-catalyst addition, organic-inorganic heterojunction formation and non-metal doping and their potential applications. The study seeks to address existing limitations in PhCN, providing a pathway toward scalable, …
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Low Temperature Electrical Transport in 2D Layers of Graphene, Graphitic Carbon Nitride, Graphene Oxide and Boron-Nitrogen-Carbon
… chemical vapor deposition (CVD) method. Liquid phase exfoliation technique was utilized to exfoliate graphene and graphitic carbon nitride samples in isopropyl alcohol. Chemical reduction technique was used to reduce graphene oxide (rGO) by utilizing ascorbic acid (a green chemical) as a …
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Photodetection and Spectrometry at the Nanoscale
… black phosphorus dispersions are produced by liquid-phase-exfoliation. Optimisation of a solvent-exchange method facilitates conversion of these dispersions into inks, which can be reliably inkjet printed to produce highly uniform black phosphorus films without significant flake degradation. …
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Nanomaterials-based inks for flexible electronics, energy and photocatalytic applications
… \par In this dissertation I investigate liquid phase exfoliation and formulation of GRMs-based inks for flexible (opto) electronics, energy and photocatalysis. First I develop a protocol for the characterization of graphene inks, based on the statistical analysis of their Raman spectra. …
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Inkjet Printing of 2d Materials on Flexible and Rigid Substrates
… this work are formulated via ultrasonic assisted liquid phase exfoliation (UALPE) of bulk graphite in isopropyl alcohol (IPA) with polyvinylpyrrolidone (PVP), followed by a centrifuge process. This allows one-step formulation of a polymer stabilised graphene ink. For MXene inks, I design a …
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Thermodynamics of ionic liquid solvents in gas purification and exfoliation mechanisms: molecular dynamics simulation and Monte Carlo calculations
… to the atmosphere. In the first study, the exfoliation of bismuth telluride (Bi2Te3) as a well-know thermoelectric (TE) material was investigated. In the literature, it has been experimentally and computationally proven that producing a thinner layer of Bi2Te3 increases the “figure of merit” …
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Preparación de nuevos nanocomposites multifuncionales de matriz epoxi basados en el empleo de materiales grafénicos
… been characterized by three different graphite exfoliation techniques: Liquid Phase Exfoliation (LPE) aiming to obtain two types of graphene with different lateral size; ultra-expansion of an intercalated compound, in this case a Stage I of GIC (graphite intercalation compound), producing a very …
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Printable 2d Material Optoelectronics and Photonics
… 2d material flakes via ultrasonic assisted liquid phase exfoliation. This allows one-step formulation of a polymer stabilised graphene ink. For TMDs and BP, I design a binary solvent carrier for binder-free ink formulation. I show that these 2d material inks have optimal fluidic properties, …
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Two-dimensional material inks and composites for printed electronics and energy
… boron nitride (h-BN) which are produced by liquid phase exfoliation for use in printed electronics and energy composite applications. In Chapter 2 I give a broad overview of the electrical, mechanical and optical properties of 2D materials among other nanomaterials that were used in the …
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Nanofluids with optimised thermal properties based on metal chalcogenides with different morphology
… two preparation methods have been explored: the liquid phase exfoliation method, and the solvothermal synthesis of the nanomaterial and its subsequent dispersion in the thermal oil by ultrasound. Experimental parameters such as surfactant concentration, time and sonication frequency for …
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Self-Powered Wearable Sweat Monitoring using 2D WS2 Textile Integrated Triboelectric Nanogenerators for Future Personalized Healthcare
… into textile substrates. 2D WS2 was produced via liquid-phase exfoliation and deposited onto fabrics using three methods: ultrasonic spray coating, drop casting, and immersion. Among these, spray coating emerged as the optimal technique due to its superior film uniformity, reproducibility, and …
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SYNTHESIS, ELECTRONIC AND OPTO-ELECTRONIC TRANSPORT PROPERTIES OF ATOMICALLY THIN 2D LAYERS OF MoS2, WSe2 and CuIn7Se11
… methods such as Chemical Vapor Deposition (CVD), liquid phase exfoliation and mechanical exfoliation as well as CVT grown mechanically exfoliated WSe2 and ternary alloy of CuIn7Se11 is reported. Specifically, it is shown that in case of MoS2, the ac conductance (σ(ω); measured in the range of …
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Molecular-thermodynamic and simulation-assisted modeling of interfacial energetics
… dynamic reconfiguration, of three-phase and four-phase complex emulsions. This fabrication makes use of the temperature-sensitive miscibility of hydrocarbon, silicone, and fluorocarbon liquids and is applied to both microfluidic and scalable batch production of complex droplets. I …
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Sensors: Metal-Organic Cages and Graphene
… into a commercial and scalable setting using liquid phase exfoliated graphene with a sulfonate-edged metal-organic cage with the intent to create an inkjet-printable selective sensor. We encountered expected successes and unexpected failures. Our aim is to establish research towards the field …
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Graphene and Related Materials Inks and Composites for Space Applications
… related materials (GRMs) can be fine-tuned via exfoliation and tailored processing conditions to enable the development of advanced materials and manufacturing capabilities for space applications. Utilizing high-pressure homogenization (HPH), I establish a framework for several techniques that …
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Graphene-based wearable textile-triboelectric nanogenerators and biokinetic sensors [Nanogeneratori triboelettrici tessili indossabili a base di grafene e sensori biocinetici]
… di grafene tramite esfoliazione in fase liquida (LPE), consentendo una produzione ad alto rendimento con una stabilità di dispersione migliorata. Questo metodo offre una soluzione scalabile ed economicamente vantaggiosa per la fabbricazione di grafene di alta qualità adatto …