Sökning: "Nanowires"

Visar resultat 11 - 15 av 128 uppsatser innehållade ordet Nanowires.

1. 11. Design and Fabrication of a Kinetic Inductance Parameric Amplifier for multi-mode entanglement studies

   Master-uppsats, KTH/Tillämpad fysik

   Författare :Sara Persia; [2022]
   Nyckelord :Parametric amplifier; kinetic inductance; superconducting NbTiN nanowires; Parametrisk förstärkare; kinetisk induktans; supraledanden NbTiN- nanotrådar;

   Sammanfattning : Parametric amplifiers are essential for analyzing and measuring the weak signals generated byquantum circuits at cryogenic temperatures. This project aims to realize a low noise travelingwave parametric amplifier (TWPA) by exploiting the nonlinear current dependence of thekinetic inductance of superconducting NbTiN nanowires. LÄS MER

3. 12. In situ X-ray diffraction studies of vertically aligned CsPbBr3 nanowire arrays

   Kandidat-uppsats, Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

   Författare :Jesper Larsson; [2022]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : The past decade has seen a great interest in the development of metal halide perovskite materials for use in photo-optical devices, due to the excellent photo-optical properties of these materials. The primary limitation to industrial adoption, and the subject of much research, is the susceptibility of these materials to degradation from exposure to various factors such as air, heat and moisture. LÄS MER

4. 13. BCP Lithography Defined Arrays of InAs NWs Grown Using MOVPE with Au Seeds

   Master-uppsats, Lunds universitet/Lunds Tekniska Högskola; Lunds universitet/Fasta tillståndets fysik

   Författare :Björn Landeke-Wilsmark; [2022]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : In this report we outline a detailed process flow for a quick and inexpensive implementation of large dense arrays of InAs nanowires (NWs) grown in the reactive ion etching/etched (RIE) pores of a SiO2/SiNx mask on top of an InAs/Si(111) substrate. The self-assembled (hexagonally close-packed) pattern of poly(methyl-methacrylate) (PMMA) cylinders in a poly(styrene) (PS) matrix adopted by a linear diblock poly(styrene-block-methyl-methacrylate) P(S-b-MMA) block-copolymer (BCP) was transferred to the dielectric stack (consisting of a ≈10 nm plasma enhanced chemical vapour deposition/deposited (PECVD) SiNX layer topped by a thin atomic layer deposition/deposited (ALD) SiO2 film) using a two-step RIE procedure. LÄS MER

5. 14. Thermoelectric measurements on InAs nanowires with a ratchet-barrier

   Master-uppsats, Lunds universitet/Fysiska institutionen; Lunds universitet/Fasta tillståndets fysik

   Författare :Hanna Lundström; [2022]
   Nyckelord :Physics and Astronomy;

   Sammanfattning : Efficient extraction of thermal energy from electrons at the micro- and nanoscale is a long-standing scientific goal that could enable novel types of heat engines, heat management, and solar cell applications. Semiconductor nanowires are a promising system for investigating such devices for several reasons, such as their thermoelectric properties, and the potential to be grown in heterostructures with high flexibility. LÄS MER

7. 15. Temperature Dependent Electrical Characterisation of Vertical InAs-InGaAs Nanowire MOSFETs

   Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

   Författare :Sofie Johannesson; Sebastian Skog; [2022]
   Nyckelord :Vertical InGaAs Nanowire MOSFET Temperature Dependence Noise; Technology and Engineering;

   Sammanfattning : This thesis presents the temperature dependence of InGaAs Nanowire (NW) metal-oxide-semiconductor field-effect transistors (MOSFETs) grown at two different temperatures. The two different growths represent one sample having nanowires which have a mixed crystal structure (showing stacking faults) and one sample with nanowires of pure crystal structure (without stacking faults). LÄS MER