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 24 for “"periodic arrays"”.
-
Model for porous alumina template formation
… of semiconductor and metal nanostructure arrays. This material system utilizes natural self-organization for the creation of periodic arrays of nanoscale structures. The underlying principle is that when aluminum is anodized in a suitable acidic electrolyte under controlled conditions, it …
-
Thermal, electrical and mechanical properties of three-dimensional functional materials
… charged surfaces can be self-assembled into the periodic arrays during the drying process of the fluids. These static periodic arrays, namely, colloidal crystals do not possess any dynamic functionalities, but serve as a sacrificial template for the fabrication of various classes of 3D functional …
-
Design optimization of acoustic metamaterials and phononic crystals with a time domain method
… unit cell and the broadband noise reduction with periodic arrays of cylinders. The acoustic wave propagation problem is solved in the time-domain using a Streamline Upwind/Petrov Galerkin formulation. Topology parameterization is accomplished using the homogenization method, and shape optimization …
-
Investigation of resonators loaded periodic structures
… components. Due to their bulk properties, periodic arrays of SRRs provide a negative permeability. Therefore under the fundamental limit of effective medium theory that the dimensions of the lattice are much smaller than the wavelength, we can treat the array of SRRs as bulk material and …
-
Large area plasmonic nanostructures design, fabrication and characterization by laser
… nanoparticles, quasi-ordered nanoparticles, and periodic arrays of nanostructures, consisting of refractive index sensing and surface enhanced Raman spectroscopy (SERS). Nanostructures are patterned by low-cost and high-efficient nanofabrication tools: thermal annealing and laser interference …
-
Optimal configuration of large arrays of floating bodies for ocean wave energy extraction
… approach to energy harvesting is to use arrays of oscillating bodies. The advantage of such a solution lies in potential amplification of the wave field through the interactions of waves that are diffracted and radiated by the bodies. Recent examples from other fields of physics (e.g. …
-
Nonlinear optical emission and near-field enhancement effects in arrays of gold bowtie nano-antennas
… the large near-field intensity enhancements from periodic arrays of gold bowtie nano-antennas (BNAs) after illumination by laser light. Specifically, we focus on laser-induced damage, nonlinear optical emission, and a proof-of-concept for utilizing arrays of gold BNAs to enhance the forces in an …
-
Frequency selective surface-based sensing: Theory and applications
"Frequency selective surfaces (FSS) are periodic arrays of resonant elements with a specific (resonant) reflection/transmission response when illuminated by electromagnetic energy. FSSs have been utilized for different applications such as spatial filters, reflectors, lenses, radomes, and more …
-
Templated self-assembly of novel block copolymers
… block copolymer is an effective way to pattern periodic arrays of features with long-range order, to generate complex patterns, and to multiplicatively increase the pattern density and resolution that are far beyond the limit of conventional lithography. Despite of the significant progress in …
-
High force density linear permanent magnet motors : "electromagnetic muscle actuators"
… sources of magnetic field, specifically periodic arrays of permanent magnets. We explain how to calculate these parameters for a variety of different types of magnet arrays using analytical magnetic field and heat transfer models, and present a new field model for tubular linear motors …
-
Envelope tracking integral equation based hybrid electromagnetic circuit simulators
… method is extended to the analysis of infinitely periodic arrays containing lumped nonlinear loads. Numerical results are presented to highlight the .features of this algorithm.
-
Order in Thin Films of Diblock Copolymers by Supramolecular Assembly
Thin membranes with dense periodic arrays of nanoscopic voids were fabricated using the principles of supramolecular assembly and self-organization in polymers. Such nanoporous membranes can be used as templates for synthesis and patterning of various organic and inorganic materials. In this thesis …
-
Fabrication of nanostructured surfaces with well-defined chemistry using particle lithography
… Particle lithography was used to produce periodic arrays of protein nanostructures. Monodisperse mesoparticles can be applied to rapidly prepare millions of uniform protein nanostructures on flat surfaces using the conventional benchtop chemistry steps of mixing, centrifuging, evaporation …
-
Photonic Properties of Self -Assembled Organic Materials: Supramolecular Films, and Nanoribbon -Templated Gels and Polymers
… glass substrates were patterned with periodic arrays of squares with lateral dimensions of 7 and 17mum, created by focused ion beams. The average molecular tilt angle was found smaller in the films on patterned substrates, suggesting that substrate micropatterning enhances overall …
-
X-ray scattering studies of strongly correlated materials: orbital ordering in KCuF3 and stripe-like domain structures in BiFeO3 epitaxial thin films
… experiments on orbitally ordered KCuF3 and periodic arrays of stripe-like ferroelectric domains in epitaxial thin films of multiferroic BiFeO3 are presented in this dissertation. Both resonant soft x-ray elastic scattering and non-resonant hard x-ray elastic scattering probes were used. Our …
-
A data storage system based on patterned magnetic media and magnetic force microscopy
… for the high performance data storage systems. Periodic arrays of nanostructured magnetic pillars have been proposed as a patterned medium for high density data storage. In patterned media, each single domain magnetic pillar is used to store one bit of data. This media can theoretically provide …
-
Multiple M-branes and 3-algebras
… on the scalar and gauge fields. We also consider periodic arrays of M2-branes in the ABJM model in the spirit of a circle compactification to D2-branes in type IIA string theory. The result is a curious formulation of three-dimensional maximally supersymmetric Yang-Mills theory. Upon further …
-
Microfluidic device and interfacial transport: application to biomolecules and nanostructures
… method to assemble these nanostructures in periodic arrays of microstripes, and form conductive electrodes with characteristic dimension of 600 nm. The conductivity of these sub-microwires is compared with the values reported in literature and bulk platinum. The process is suitable for …
-
Breaking Symmetry: A Study of Novel Phenomena in Asymmetric Nanoplasmonic Systems
… properties not achievable with symmetric or periodic optical materials, chiral, weakly disordered, deterministic aperiodic, quasiperiodic and random structures make up a new wave of asymmetric optical systems demonstrating unprecedented control of light compared to their periodic counterparts …
-
Nanophosphor-based Photonics
… combination with a photonic system based on periodic arrays of metallic nanopar-ticles. Second, for the first time, soft lithography is applied directly to phosphor nanoparticles to obtain monolithic structures with periodic surface patterns. Finally, inks are formulated to create arbitrary …
Page 1 of 2