Relevant bibliographies by topics / 2D material technology / Dissertations / Theses
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Dissertations / Theses on the topic '2D material technology'

Author: Grafiati
Published: 6 September 2023

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1

Hempel, Marek Ph D. Massachusetts Institute of Technology. "Technology and applications of 2D materials in micro- and macroscale electronics." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/130201.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, May, 2020<br>Cataloged from student-submitted PDF of thesis.<br>Includes bibliographical references (pages 198-209).<br>Over the past 50 years, electronics has truly revolutionized our lives. Today, many everyday objects rely on electronic circuitry from gadgets such as wireless earbuds, smartphones and laptops to larger devices like household appliances and cars. However, the size range of electronic devices is still rather limited from the millimeter to meter scale. Being able to
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2

ROTTA, DAVIDE. "Emerging devices and materials for nanoelectronics." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2015. http://hdl.handle.net/10281/76048.

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Questa tesi analizza la possibile implementazione di due tipologie di dispositivi elettronici con funzionalità innovative: dispositivi per la computazione quantistica e transistors a film sottile. Negli ultimi decenni l’industria dei semiconduttori ha portato alla realizzazione di circuiti integrati con milioni di transistors e performance sempre migliori a costi contenuti. Tuttavia, questo processo di miniaturizzazione è giunto a un punto tale che i dispositivi elettronici sono ora composti da pochissimi atomi e ridurne ulteriormente le dimensioni sta diventando sempre più difficile. L’Intern
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3

Jaouen, Kévin. "Backside absorbing layer microscopy : a new tool for the investigation of 2D materials." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS296/document.

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La microscopie optique sur substrats antireflets est un outil de caractérisation simple et puissant qui a notamment permis l'isolation du graphène en 2004. Depuis, le domaine d'étude des matériaux bidimensionnels (2D) s'est rapidement développé, tant au niveau fondamental qu'appliqué. Ces matériaux ultraminces présentent des inhomogénéités (bords, joints de grains, multicouches, etc.) qui impactent fortement leurs propriétés physiques et chimiques. Ainsi leur caractérisation à l'échelle locale est primordiale. Cette thèse s'intéresse à une technique récente de microscopie optique à fort contra
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4

Biasco, Simone. "Photonic engineering of CW, ultrabroad gain, aperiodic quantum cascade lasers at terahertz frequencies integrations with 2D materials and study of the optical mode dynamics." Doctoral thesis, Scuola Normale Superiore, 2019. http://hdl.handle.net/11384/85908.

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The terahertz (THz) frequency range of the electromagnetic spectrum is usually defined in the range between 0.1 THz and 10 THz, corresponding to wavelengths in the interval from 3 mm to 30 µm, lying in-between the infrared and the microwave spectral regimes. In recent years, the progress of THz technology has fostered interdisciplinary research in spectroscopy and tomography to map macroscopic systems, (chemical detection and imaging, amongst others) or microscopic ones, such as nanoparticles and nanowires on either static or dynamic timescales. THz radiation is commonly generated with
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5

Ullberg, Nathan. "Field-effect transistor based biosensing of glucose using carbon nanotubes and monolayer MoS2." Thesis, Uppsala universitet, Molekyl- och kondenserade materiens fysik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-397719.

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As part of the EU SmartVista project to develop a multi-modal wearable sensor for health diagnostics, field-effect transistor (FET) based biosensors were explored, with glucose as the analyte, and carbon nanotubes (CNTs) or monolayer MoS2 as the semiconducting sensing layer.  Numerous arrays of CNT-FETs and MoS2-FETs were fabricated by photolithographic methods and packaged as integrated circuits.  Functionalization of the sensing layer using linkers and enzymes was performed, and the samples were characterized by atomic force microscopy, scanning electron microscopy, optical microscopy, and e
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6

Bandyopadhyay, Avra Sankar. "Light Matter Interactions in Two-Dimensional Semiconducting Tungsten Diselenide for Next Generation Quantum-Based Optoelectronic Devices." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1752376/.

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In this work, we explored one material from the broad family of 2D semiconductors, namely WSe2 to serve as an enabler for advanced, low-power, high-performance nanoelectronics and optoelectronic devices. A 2D WSe2 based field-effect-transistor (FET) was designed and fabricated using electron-beam lithography, that revealed an ultra-high mobility of ~ 625 cm2/V-s, with tunable charge transport behavior in the WSe2 channel, making it a promising candidate for high speed Si-based complimentary-metal-oxide-semiconductor (CMOS) technology. Furthermore, optoelectronic properties in 2D WSe2 based pho
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7

Prasad, Parmeshwar. "Parametric Manipulation in 2D Material based NEMS Resonators." Thesis, 2018. https://etd.iisc.ac.in/handle/2005/4669.

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In this this thesis, I have studied dynamics of the two-dimensional (2D) material based NEMS resonators with resonant frequency ranging typically from 10 MHz to 100 MHz. The experiment involved fabrication of the suspended nano-scale devices both with global and local gate architectures. The experiments focused on parametric manipulation of MoS2 drum resonator using electrical actuation and detection schemes. This study demonstrated parametric ampli cation in the NEMS at non-cryogenic temperature and discussed effects of During non-linearity on the parametric gain. Further, multimo
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8

Duarte, Henrique Manuel Sousa. "The material non linear analysis of 2D strutures using a radial point interpolation method." Dissertação, 2014. https://repositorio-aberto.up.pt/handle/10216/84114.

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9

Duarte, Henrique Manuel Sousa. "The material non linear analysis of 2D strutures using a radial point interpolation method." Master's thesis, 2014. https://repositorio-aberto.up.pt/handle/10216/84114.

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10

Kuruva, Hemanjaneyulu. "Addressing the Performance and Reliability Bottlenecks in 2D Transition Metal Dichalcogenide (TMD) Based Transistor Technology." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5716.

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In this thesis, we presented different contributions towards the development of 2D material technology. Firstly the realization of desired dimensions over singlecrystal high-quality MoS2 material through dry etching techniques. SF6 plasma induces large residue over the material, inhibiting the application despite its advantage over SiO2 etch selectivity. On the other hand, CHF3 plasma is shown to give a well-controlled etching process with its relatively lower etch rate than SF6 plasma. However, under over-etch conditions, plasma is observed to introduce two significant challenges. The
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11

Brahma, Madhuchhanda. "Multiscale Modeling of Quantum Transport in 2D Material Based MoS Transistors." Thesis, 2019. https://etd.iisc.ac.in/handle/2005/5133.

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Atomically thin 2D materials have ushered in a new era in the fi eld of nano-science and tech- nology and have been translated to notable advancements in the design of sensors, optoelectronic devices, exible electronics. These atomically thin materials are predicted to replace conven- tional bulk materials, Si and Ge, for transistor channels and extend the complementary metal oxide semiconductor technology road-map beyond the deca-nanometer regime. Constant efforts are being made to fabricate devices based on some of the recently discovered van der Waal's materials such as graphene, hexa
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12

(11036556), Yen-yu Chen. "2D MATERIALS FOR GAS-SENSING APPLICATIONS." Thesis, 2021.

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<div> <div> <div> <p> </p><div> <div> <div> <div> <div> <div> <p> </p><div> <div> <div> <p>Two-dimensional (2D) transition-metal dichalcogenides (TMDCs) and transition metal carbides/nitrides (MXenes), have been recently receiving attention for gas sensing applications due to their high specific area and rich surface functionalities. However, using pristine 2D materials for gas-sensing applications presents some drawbacks, including high operation temperatures, low gas response, and poor selectivity, limiting their practical sensing applications. Moreover, one of the long-standing challe
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13

Ansh. "Disruptive Approaches to Address Performance & Reliability Challenges in 2-Dimentional (2D) Material Based Transistors & Memories." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5278.

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In 2020, Apple introduced its most advanced laptop that has the A14 Bionic processor. The very first processor, Intel’s 4004, was launched in 1971 and had a transistor (the basic building block of a processor) density of ~ 205 transistors/mm2. Compared to that, Apple’s A14 Bionic processor comes with an astonishingly large ~ 125 million transistors/mm2. Such a remarkable evolution in silicon transistor technology has occurred in the last five decades. This has arguably been the most rapidly growing field in the 300,000 thousand years old history of modern humans. Computational power, functio
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14

Kumar, Jeevesh. "Atomic-level Investigation and Proposals to Address Technological Roadblocks and Reliability Challenges in 2D Material Based Nanoelectronic Devices." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5872.

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The transistor scaling is witness to many extraordinary inventions during its consecutive miniaturization. The journey began from Dennard’s classical constant field scaling, crossing through the milestones like strain engineering, high ‘k’ gate dielectric, ultrathin body transistor (UTB), silicon on insulator (SOI), and multi-gate 3D architectures, and continues in the form of advanced FinFET technology. However, further downscaling is sensing a dead-end because of the various challenges due to fundamental limitations of silicon, the building material of the transistor. Among these, two signif
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15

Kedambaimoole, Vaishakh. "Wearable Sensors using Solution Processed 2D Materials." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4920.

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Wearable sensors, as the name implies, are devices that can be donned onto the body in order to continuously detect, monitor and analyze various signals generated by the subject and the immediate surroundings. Applications of these sensors span over the vast domains of healthcare, athletics, automation and robotics. Conventional wafer-based electronics are brittle and rigid. Wearable devices demand new materials that provide mechanical liberty in terms of flexibility and stretchability with superior functionalities. When the physical dimensions of materials are reduced to the nano scale r
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16

Fontes, Hélder Filipe Verdade da Silva. "Synthesis and characterization of doped 2D materials." Master's thesis, 2019. https://hdl.handle.net/10216/122274.

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17

(9337943), Chun-Li Lo. "Applications of Two-Dimensional Layered Materials in Interconnect Technology." Thesis, 2020.

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<p>Copper (Cu) has been used as the main conductor in interconnects due to its low resistivity. However, because of its high diffusivity, diffusion barriers/liners (tantalum nitride/tantalum; TaN/Ta) must be incorporated to surround Cu wires. Otherwise, Cu ions/atoms will drift/diffuse through the inter-metal dielectric (IMD) that separates two distinct interconnects, resulting in circuit shorting and chip failures. The scaling limit of conventional Cu diffusion barriers/liners has become the bottleneck for interconnect technology, which in turn limits the IC performance. The interconnect half
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18

Tripathi, Rahul. "Synergetic effect of electrostatic gating and interfacial states in molecular switching operation in molybdenum disulfide based thin hetero-interfaces." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/5145.

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Nowadays, two-dimensional (2D) materials have stimulated intensive research due to their intriguing physical properties and excellent electronic application. van der Waals (vdW) semiconductors are attractive for electrically controllable carrier confinement, combined with the diverse nature of 2D materials that enable superior electrostatic control. Molecular interaction in two-dimensional van der Waals interfaces has drawn tremendous attention for extraordinary materials characteristics. This work encompasses molecular responses study of various atomically thin heterostructures made of moly
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19

Kesharwani, Om. "First-principles based study of graphene inserted tellurene-metal interface." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5107.

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Atomically thin two-dimensional (2D) materials have attracted extensive research interest since the journey started with the successful isolation of graphene in 2004. 2D materials have shown remarkable advancement in the design of the sensor, optoelectronic devices, and flexible electronics. Continuous efforts are being made to fabricate the electronic devices based on these two-dimensional layered materials such as graphene, hexagonal boron nitride, transition metal dichalcogenides (TMD), phosphorene etc. Recently a new 2D material, tellurene has joined the 2D material family and its po
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20

Das, Biswapriyo. "Atom-to-circuit Modeling Strategy for 2d Transistors." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4934.

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Two-dimensional materials are now being considered as viable options for CMOS (complementary metal-oxide-semiconductor) technology extension due to their diverse electronic and opto-electronic properties. However, introduction of any new material in the process integration phase of technology development in the semiconductor industry is an expensive and time-consuming affair. It is also difficult to select an appropriate 2D material from the plethora without assessing their performance at circuit level. Thus, first-principles-based multiscale models that enable systematic performance evaluatio
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21

Murali, Krishna. "Engineering van der Waals Heterojunctions for Electronic and Optoelectronic Device Applications." Thesis, 2020. https://etd.iisc.ac.in/handle/2005/4778.

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Efficient preparation and characterization of layered materials and their van der Waals heterojunctions lay the foundation for various opportunities in both fundamental studies and device applications. The vast library of 2D materials displays a range of electronic properties, including conductors, semiconductors, insulators, semimetal, and superconductors, and shows strong light-matter interaction. The fact that each layer in the layered material is bonded via van der Waals interaction opens up the possibility of assembling different layers arbitrarily without any consideration over the
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22

Jain, Tripti. "Classifying Magnetic and Non-magnetic Two-dimensional Materials by Machine Learning." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5557.

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There has been a giant leap in technological advancement with the introduction of graphene and its remarkable properties after 2005. Since the inception of graphene, the new class of materials called 2D materials are actively being focused on for their potential use case. The recent introduction of magnetism in 2D materials has sparked a new interest among researchers due to the potential use of magnetic properties in spintronics, which is highly admired in storage devices. The extensive library of newly predicted or even synthesized 2D materials made it impossible to screen them experimentall
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23

Dandu, Medha. "Tailoring optical and electrical characteristics of layered materials through van der Waals heterojunctions." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5623.

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The feasibility of isolation of layered materials and arbitrary stacking of different materials provide plenty of opportunities to realize van der Waals heterostructures (vdWhs) with desired characteristics. In this thesis, we experimentally demonstrate the tunability of optical and electrical characteristics of transition metal dichalcogenides (TMDs), a class of layered materials, using their vdWhs. Monolayer (1L) TMDs exhibit remarkable light-matter interaction by hosting direct bandgap, strongly bound excitonic complexes, ultra-fast radiative decay, many-body states, and coupled spin-valley
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24

Singh, Deependra Kumar. "Layered Metal Dichalcogenides-Based Hybrid Devices for Resistive Sensing." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5175.

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During the past few decades, photodetectors (PDs) are being regarded as the crucial components of many photonic devices which are being used in various important applications. However, the PDs based on the traditional bulk semiconductors still face a lot of challenges in terms of the device performance such as low responsivities, high response/recovery times, high power consumption, narrow detection range, and so forth. To overcome these limitations, a novel class of two-dimensional materials known as layered metal dichalcogenides (LMDCs) has shown great promise and the LMDCs-based PDs have be
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25

Gupta, Garima. "Excitons in monolayer transition metal dichalcogenides." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5706.

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Excitons are quasiparticles formed due to electrostatic attraction between the electrons and the holes in a semiconductor. This Coulomb attraction is very strong in the mono- layers of Transition Metal Dichalcogenides (TMDs) mainly because of strong quantum confinement, reduced dielectric screening, and high effective mass of electrons and holes in these material systems. A 2D hydrogen atom is a simple model to describe confined excitons in these monolayer films. A more formal way to describe excitons in thin semi- conductors is through the Bethe-Salpeter formalism which describes these
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26

Kumar, Mayank. "First principles-based study of monolayer WSSe and metal interface." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/6144.

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The semiconductor-metal interface is universal for any electron device. Two-dimensional semiconductors have the advantages of free dangling bonds and atomically flat surfaces, making them promising materials to substitute bulk-Silicon in next-generation transistors. However, two-dimensional material like transition metal dichalcogenides (TMD) makes highly resistive contact with metallic electrodes in electronic devices. A material with intrinsic dipole can optimize this effect. 2D Janus TMD MoSSe has structural symmetry like MoS2 and contains intrinsic dipoles that strongly modify the metal co
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27

Desjardins, Marc-Antoine. "Construction interactive de BRDFs par simulation 2D de micro-géométries en couches multiples." Thèse, 2012. http://hdl.handle.net/1866/9201.

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Les modèles de réflexion complexes, avec leurs nombreux paramètres dont certains restent non intuitifs, sont difficiles à contrôler pour obtenir une apparence désirée. De plus, même si un artiste peut plus aisément comprendre la forme de la micro-géométrie d'une surface, sa modélisation en 3D et sa simulation en 4D demeurent extrêmement fastidieuses et coûteuses en mémoire. Nous proposons une solution intermédiaire, où l'artiste représente en 2D une coupe dans un matériau, en dessinant une micro-géométrie de surface en multi-couches. Une simulation efficace par lancer de rayons en seulement 2
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28

Ullberg, Nathan. "Characterizing optical and electrical properties of monolayer MoS2 by backside absorbing layer microscopy." Thesis, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-419630.

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Nanomaterials are playing an increasing role in novel technologies, and it is important to develop optical methods to characterize them in situ.  To that end, backside absorbing layer microscopy (BALM) has emerged as a powerful tool, being capable to resolve sub-nanometer height profiles, with video-rate acquisition speeds and a suitable geometry to couple live experiments.  In the internship, several techniques involving BALM were developed, and applied to study optical and electrical properties of the transition metal dichalcogenide (TMD) monolayer MoS2, a type of 2-dimensional (2D) crystall
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29

Abraham, Nithin. "Van der Waals Heterojunctions for Emerging Device Applications." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/6049.

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Low-dimensional systems are an exciting platform for exploring new physics and realizing novel devices. The intriguing features, such as the existence of strongly bound multiparticle complexes and thickness-dependent band structures, enable us to utilize them to overcome many challenges faced by bulk materials and conceive new technologies. Since the isolation of graphene, the class of two-dimensional materials has grown tremendously. The array of materials one can choose from for implementing an idea is vast. Nevertheless, understanding the underlying physics is essential for utilizing these
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