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.
Results
Showing 1 to 20 of 466 for “"nanowires"”.
-
Metal-organic nanowires
Metal-organic nanowires exhibit not only the properties of one-dimensional structures including ultra-small scale, large surface-to-volume ratio etc., but also obvious advantages in their tunable properties and label-free sensing ability by optical or electrical readout. Thus, the evaluation of …
-
Spectroscopy of correlated nanowires
… is concerned with spectroscopy of correlated nanowires, in particular carbon nanotubes and La_{2/3}Sr{1/3}MnO_3 (LSMO) nanowires. The technique of nonequilibrium superconducting tunnel spectroscopy is performed on carbon nanotube devices, and after subsequent deconvolution, the nonequilibrium …
-
Magnetostatic interaction in nanowires
… on the manipulation of domain walls in magnetic nanowires, and scaling of these devices requires an understanding of domain wall behavior as a function of the wire width. Due to the increased importance of edge roughness and microstructure in narrow lines, domain wall pinning increases …
-
Thermoelectric properties of Bi₁âx̳Sbx̳ nanowires and lead salt superlattice nanowires
… transport properties of BilxSbx nanowires, and presents a theoretical framework for predicting the electrical properties of superlattice nanowires. A template-assisted fabrication scheme is employed to synthesize Bi-based nanowires by pressure injecting liquid metal alloys into …
-
Microwave Response in Superconducting Nanowires
We fabricate superconducting wires using molecular templating technique to study their transport properties when exposed to microwave radiation (MW), at cryogenic temperatures. Our wires have a diameter on the order of the zero temperature coherence length, which makes them quasi-one-dimensional at …
-
Electrochemical synthesis of functional nanowires
Semiconducting, metal, and multi-segmented nanowires of 200 nm diameters with lengths up to 10_m were synthesized through electrochemical deposition in the pores of anodic aluminium oxide (AAO) and polycarbonate track-etched (PCTE) templates. With the work focusing on CdSe nanowires, results from …
-
Study of ultranarrow superconducting NbN nanowires and nanowires under strong magnetic field for photon detection
Photon detection is an integral part of experimental physics, high-speed communication, as well as many other high-tech disciplines. In the realm of communication, unmanned spacecraft are travelling extreme distances, and ground stations need more and more sensitive and selective detectors to …
-
Silicon nanowires : photovoltaic and thermoelectric applications
Örtækni gegnir þýðingarmiklu og vaxandi hlutverki við nútíma orkuöflun og orkuvinnslu. Markmið þessa verkefnis er að beita örtækni til að framleiða sólarhlöð og varmahlöð (e. thermoelectric cell), byggð á örgrönnum kísilvírum, til orkuvinnslu. Kostir nanóvíra í sólarhlöðum eru m.a. stórt …
-
Semiconductor nanowires: towards enhanced terahertz sources
… frequency region by utilizing semiconductor nanowires due to advantages attributed to their one-dimensional structure, and also studying materials properties by adopting ultrafast THz time-domain spectroscopy (THz-TDS). In order to achieve stronger THz emission from semiconductor nanowires, …
-
Interaction Effects in Nickel Nanowires Arrays
Systems of magnetic nanowires are considered strong candidates in many technological applications as microwave filters, sensors or devices for data storage. Because of their strong potential as candidates in such applications they became lately the object of many studies. However, due to the very …
-
Controlled Lasing in Gallium Nitride Nanowires
… lasers. The first method involves placing two nanowires side-by-side in contact to form a coupled cavity. The coupled cavity can generate a Vernier effect, which is able to suppress both multi-longitudinal and multi-transverse mode operation, giving rise to the single-mode lasing in these …
-
Dielectrophoretic formation of nanowires and devices
… report the self-assembly of metallic palladium nanowires from the aqueous solution by dielectrophoresis. The metal cations with the surrounding hydration shell and counter-ion cloud results in the formation of a dipole which responds to the local dielectrophoretic forces. Structural properties …
-
Fabrication and characterisation of bismuth nanowires
Single- and polycrystalline bismuth nanowires were created by electrochemical deposition in ion track-etched polycarbonate membranes. Wires fabricated potentiostatically possess a strong <110> texture which becomes more pronounced for wires deposited at lower overpotentials, at higher temperatures, …
-
Doping of group IV semiconductor nanowires
As Moore’s Law predicted in the 1960s, advancements in technology have led to an exponential increase in the numbers of transistors required per square inch of integrated circuits, leading to an ever pressing need for smaller transistors. In turn, there is a need for novel transistor architectures …
-
Titania Nanowires: synthesis, characterization and properties.
… explored the synthesis of titanium dioxide nanowires by seed assisted thermal growth in the temperature range between 600-1000 °C. In order to improve the photocatalytic performances of TiO2 NWs, we modified the samples applying two approach: doping by ion implantation of Fe+ and annealing …
-
Fabrication and measurement of superconducting nanowires
… to produce sub-100nm wide superconducting nanowires. Nanowires of niobium and Y Ba\(_2\)Cu\(_3\)O\(_{7-δ}\) (YBCO) were fabricated in thin films using focused gallium ion beam milling (FIB) to a range of widths (100nm-300nm). A procedure was developed to controllably reduce the wire widths …
-
Resistance in Superconducting Epitaxial Niobium Nanowires
… resistance observed in extremely narrow nanowires well below the critical temperature. However, attributing this additional resistance to quantum phase slips has been controversial. In part, this controversy is due to the amorphous nature of the majority of manufactured nanowires; such …
-
Engineering superconductivity in ballistic semiconductor nanowires
Semiconductor nanowires are promising materials for studying novel quantum devices. Following proposals to use 1D nanostructure to realize Majorana zero modes, quasiparticles that are relevant for topological quantum computing, many groups have attempted to engineer these modes in hybrid …
-
Electrodeposited Functional Nanowires for Energy Applications
… intrinsic material properties. In particular, nanowires (NWs) have large surface-to-volume ratio and large aspect ratio (length / diameter), which makes them sensitive to low-amplitude vibrations and have increased flexibility compared to the bulk form of the material. In this thesis, …
-
Smoothing silver nanowires for optoelectronic applications
Silver nanowire meshes have shown potential for becoming a more robust, flexible alternative to traditional ceramic and brittle metal oxides. However, the current methods employed at making these films are not scalable and the high aspect ratios limit their final use. Spray coating is a technique …
Page 1 of 24