Ämneskategori: Nanovetenskap och nanoteknik

Hittade 275 dokument - visar 20 per sida

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1. Fabrication of double-sided Fresnel zone plates and absolute measurements of their diffraction efficiency in an X-ray-tube-based setup
   Yurgens, Viktoria
   Examensarbete på avancerad nivå, 2019 (MSc - Nanotechnology)
   Diffractive lenses for X-rays, so-called Fresnel zone plates (FZPs), are used as focusing elements in X-ray imaging applications in synchrotrons all over the world. One of the main characteristics of FZPs is their diffraction efficiency. Measurements of the absolute diffraction efficiency as a function of the X-ray energy can reliably be done using synchrotr...
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2. Bandgap för två lager grafen vid asymmetrisk dopning och pålagt elektriskt fält
   Bossér, John; Engström, Arimande; Gulliksson, Martin; Engström, Joakim Hveisel-Ditlevsen; Rosendal, Victor; Tidekrans, Isabel Vrethed
   Examensarbete för kandidatexamen, 2018 (Teknisk fysik (300 hp))
   Syftet med projektet var att studera algoritmerna bakom täthetsfunktionalteori (DFT) och att använda DFT för att bestämma bandgap och laddningstäthet för tvålagrigt grafen, vilket gjordes med programvaran Quantum ESPRESSO. Många tillämpningar kräver ett bandgap vilket ej finns naturligt i materialet. Syftet med denna studie var därför att introducera det uta...
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3. Towards visible-to-UV photon upconversion
   Olesund, Axel
   Examensarbete på avancerad nivå, 2018 (MSc - Nanotechnology)
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4. Active electronically controlled IFF-antenna for L-band
   Nilsson, Albin; Schultze, David
   Examensarbete på avancerad nivå, 2018 (MSc - Wireless, Photonics and Space Engineering)
   The projects purpose is to design, build and measure a transmitter and receiver module (TRM) and antenna prototype for an IFF/SSR system using Active Electronically Scanned Array (AESA) technique, which is unique in these systems.The project concludes the design, build and measurement of a TRM split in its basic blocks in the form of test circuits. An antenn...
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5. Linear and Efficient Power Amplifier Design Based on a New Optimisation Method
   Antony, Chris Jean
   Examensarbete på avancerad nivå, 2018 (MSc - Wireless, Photonics and Space Engineering)
   Power Amplifiers (PAs) are an integral part of any communication system. Power Amplifiers dominate the overall power consumption of the transmitter. In orderto simplify the design procedure, simulations and measurements of PAs are usually done with simple signals such as continuous wave (CW). However, in reality thesignals are modulated and this calls for a...
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6. Contactless noninvasive probing of model cells
   Skarrie, Arvid
   Examensarbete på avancerad nivå, 2017 (MSc - Nanotechnology)
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7. The effect of PLGA nanoparticles on the osteogenic differentiation of hMSC
   Dahlgren, Lukas
   Examensarbete på avancerad nivå, 2017 (MSc - Materials Chemistry and Nanotechnology)
   The polymer poly(lactic-co-glycolic acid) (PLGA) is both biocompatible and biodegradableand has therefore become one of the most frequently used polymers inthe biomedical field. In this thesis, a literature study has been conducted on PLGAas a biomaterial. PLGA nanoparticles with a diameter of approximately 400 nmhave been produced with the solvent evaporati...
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8. Quantum state tomography of 1D resonance fluorescence
   Strandberg, Ingrid
   Examensarbete på avancerad nivå, 2017 (MSc - Physics and Astronomy)
   Tomography is the name under which all state reconstruction techniques are denoted,one of the most recognized examples being medical tomography. Quantumstate tomography is a procedure to determine the quantum state of a physical system.By performing homodyne measurements on resonance fluorescence from anartificial atom coupled to a one-dimensional transmissi...
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9. Understanding the Mechanism of PAQR-2 through Modeling and Simulations
   Sandström, Hilda
   Examensarbete på avancerad nivå, 2017 (MSc - Nanotechnology)
   PAQR-2 is a transmembrane protein in C. elegans with seven transmembrane helicesand a zinc site. As a homolog to the human ADIPOR receptors, which areinvolved in regulating membrane fluidity and are of importance when studying glucosetoxicity in diabetes patients, the mechanism of PAQR-2 holds many undiscoveredsecrets to understanding membrane fluidity regul...
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10. Lågpassfilter för supreledande mikrovågsresonatorer
    EDENBORG, PHILIP; LINA, HULTQUIST; MATTIAS, SJÖSTEDT; JOHAN, WINTHER
    Examensarbete för kandidatexamen, 2017 (Kandidatarbete)
    Vi hypotiserar att kommersiella bandpassfilter släpper igenom fotoner över supraledande aluminiums bandgapsfrekvens 88 GHz som orsakar förluster i supraledande mikrovågsresonatorer. Vi tillverkade distribueradelågpassfilter för att öka interna kvalitetsfaktorn Qiför resonatorerna. Filtrens frilagda ledare var av varierande längd och omgavs av Stycast. Mätnin...
11. Charge and Heat Control in Nanoelectronic Devices
    Johansson, Erik; Max, Jakob; Nilsson, Hampus Renberg; Tabakovic, Selma
    Examensarbete för kandidatexamen, 2017 (Kandidatarbete)
    This study examines thermoelectric properties in nanoelectronic devices, specifically setupsknown as quantum dots. Thermoelectric effects, the relation between voltage gradients andtemperature biases, are investigated. Some useful thermoelectric properties of quantum dotsinclude the ability to extract electrical power from a temperature gradient or transport...
12. Numerisk modell av det mänskliga ögat
    FERNANDEZ ALONSO, BRUNO; KARLSSON, SOFIA; PANTIN LILJEVALL, SEBASTIAN; SECH, MARTIN
    Examensarbete för kandidatexamen, 2017 (Kandidatarbete)
    Ögat är en komplex del av den mänskliga kroppen. Att kunna simulera det med hjälp av ma-tematiska modeller gör det enklare att förstå hur synen fungerar, samt hur denna påverkasav eventuella synfel. Syftet med detta projekt är att ta fram en sådan numerisk modell ochundersöka synfelen myopia (närsynthet), hyperopia (långsynthet), astigmatism, presbyopia (ål-...
13. Photochemistry of a Photochromic Ruthenium Sulfoxide Complex for increased Understanding of Structure–Properties Relationship
    Gasslander, August Karlsson
    Examensarbete på avancerad nivå, 2017 (MSc - Materials Chemistry and Nanotechnology)
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14. Radiometrisk fjärrmätning av isbildning på vägytor
    Axelsson, Martin; Forsberg, Gustav; Håkansson, Aron Laurell; Lidholm, Edvin; Smedberg, Simon; Sällberg, Joakim
    Examensarbete för kandidatexamen, 2017 (Kandidatarbete)
    This report investigates the ability to determine road conditions with radiometric remotesensors, in order to detect ice or water at a distance. The project consists of the developmentof a theoretical model, with associated assumptions and delimitations, numericalsimulations in COMSOL Multiphysics as well as experimental measurements to verifyor dementiate t...
15. Design, fabrication and measurements of planar Goubau lines from 0.75 THz to 1.1 THz
    Cabello Sanchez, Juan
    Examensarbete på avancerad nivå, 2017 (MSc - Wireless, Photonics and Space Engineering)
    Terahertz (THz) waves have proven to possess a unique interaction with biomolecules, and therefore it’s interesting to study its influence using biosensors. Recent advances in heterodyne technology allow measuring on-wafer scattering parameters with Vector Network Analysers (VNA) up to 1.1 THz, which could be used for THz molecular spectroscopy. Compared to...
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16. Fabrication of biosensors enabling glucose and glutamate detection. Characterisation and study of enzymatic electrochemical biosensors
    Johansson, Sanna; Johansson, Ylva
    Examensarbete på grundnivå, 2017 (Kemiteknik, högskoleingenjör (180 hp))
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17. Integration of plasmonic nanostructures on waveguides
    Sjöberg, Mattias
    Examensarbete på avancerad nivå, 2017 (MSc - Nanotechnology)
    Due to the limited sensitivity of many currently used single particle analyzationmethods for the investigation of biological nanoparticles, such as exosomes andvirions, many suffer from a bias towards the larger size ranges while sub 90 nmparticles are potentially disregarded or less accurately analyzed. The division ofBiological Physics at Chalmers has for...
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18. Development of a Nanoplasmonic Ruler
    O´Reilly, Padraic
    Examensarbete på avancerad nivå, 2017 (MSc - Nanotechnology)
    The ability to simultaneously and independently measure the refractive index and thickness ofa thin film is of tremendous interest in the fields of material science and biology. For example,via these measurements it can be possible to thoroughly investigate the effects of temperatureon a material or the conformational changes of a cell membrane upon the bind...
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19. Synthesis of Catalyst-free InAs Nanowires on Silicon
    Badawy, Ghada
    Examensarbete på avancerad nivå, 2016 (Masterarbete)
    Semiconductor nanowires are nanometre-sized structures offering a wealth of unique and novel properties affiliated with their nanoscopic dimensions and are thus being extensively studied and appraised for their potential to reshape future electronic, photonic and sensing device applications. Of great significance, are nanowire (NW) synthesis techniques provi...
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20. Spectroscopic investigations of rotating gold nanorods in an optical trap
    Andrén, Daniel
    Examensarbete på avancerad nivå, 2016 (Masterarbete)
    Due to their extraordinary plasmonic properties, gold nanorods are prime candidates fora variety of sensory, biomedical, spectroscopic, and data storage applications. Recentstudies have demonstrated that gold nanorods trapped by optical tweezers can functionas nanoscopic rotary motors driven by scattering induced optical torques. The systemholds promise for...
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