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.
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Showing 1 to 20 of 40 for “"nanopatterning"”.
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Proximity Field Nanopatterning, Its Optics and Applications
New techniques for three dimensional (3D) nanopatterning have been an active field of research to comply demanding complex structures and nanoscale sizes of proposed ideas and potential applications; conventional photolithography and other nanopatterning methods are useful for some of them, still, …
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Scalable direct electrochemical nanopatterning of silver films
Metallic nanostructures play an important role in micro and nanotechnology, from interconnects in electronics, electrodes in chemical sensors, batteries, plasmonic waveguides, structural color generation in sub-wavelength optics and catalysts in micro-reactor surfaces. Silver, of all the elements, …
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NANOPATTERNING OF FREE-STANDING VAN DER WAALS HETEROSTRUCTURES USING CHARGED PARTICLES
… In this thesis, we demonstrate selective nanopatterning of free-standing hBN-encapsulated graphene and semiconducting TMDs using focused helium ion beams. By leveraging differences in electronic and nuclear stopping powers, we achieve layer-specific modification where the active layer …
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Studies of ion beam nanopatterning on silicon and polymer thin film
… incidence angle. A preliminary study of ion beam nanopatterning of polymer thin films is also presented in this thesis. The research on ion beam nanopatterning of Si is largely motivated by a recent theory predicting the development of well ordered ripples when the ion incidence angle is close to …
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Novel analytical method for investigating compositional driven ion-induced nanopatterning of multicomponent materials
Ion-induced nanopatterning of GaSb produces hexagonally ordered nanopatterns with cone-shaped nanofeatures, where experimental investigations have shown that these nanopatterns form under a wide variety of ion parameters – including ion energy and ion species. Several theoretical works have …
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A systematic study of ion-induced nanopatterning on photonic crystal-based label-free optical biosensor
… chemistry can be achieved by the use of ion-beam nanopatterning, in which a beam of energetic ions is incident onto the surface with a tunable energy, incident angle and fluence, in order to disturb the equilibrium of the surface and induce redistribution of surface atoms, and hence changes in …
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Disorder and nanopatterning in ordered binary alloys: in situ ion irradiation and kinetic Monte Carlo simulation
We study the effects of temperature and disordering rate on the ordered microstructures of real and simulated binary alloys. The behavior of Cu3Au, an alloy with L12 chemical order, is investigated experimentally through in situ electron diffraction and dark-field transmission electron microscopy. …
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Deciphering the role of surface composition and topography in self-organized ion-induced nanopatterning of multicomponent semiconductors with in-situ and in-operando metrology
… and compositional evolution of ion-induced nanopatterning on GaSb utilizing in-operando Grazing-Incidence Small-Angle X-ray Scattering (GISAXS), X-ray Photoelectron Spectroscopy (XPS), and Low Energy Ion Scattering Spectroscopy (LEISS) techniques, the effects of both cryogenic and high …
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A hybrid approach towards on-chip visible lasers
… devices (LEDs) for displays. However, nanopatterning these materials and integrating them into photonic devices has proven dicult due to fabrication constraints. In this work, we demonstrate strategies for processing and nanopatterning organic molecules, colloidal quantum dots, and …
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Unique Approaches to Interfacial Nanoscience
… techniques are also explored. The nanopatterning of mica with a focused ion beam (FIB), shown for the first time here, has led to the formation of a wide variety of nanorod structures embedded in and supported by a number of different surfaces. The fabrication and properties of …
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Synthesis and Application of Well-Defined Stimuli Responsive Materials
… fabricated in a single step via proximity field nanopatterning which provided interesting surface structured materials without the need for development or post curing. The same material was used to prepare isotropic colloidal particles of the polymer. These latex particles were transformed to …
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Submicron patterning using laser interference lithography
… protocol, and initial results of an alternative nanopatterning technique called Interferometric Lithography (IL) are presented. Comprised of the identical process attributes of traditional projection photolithography, IL mirrors the wafer preparation and development procedures of our existing …
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Large-scale molecular dynamics investigations of ion-induced compositional dynamics leading to nanopattern formation at semiconductor surfaces
Ion beam nanopatterning has been demonstrated to be a versatile method for obtaining a wide variety of surface features on a broad range of materials, with structures such as ripples, quantum dots, terraces, and ordered holes being obtained for various experimental conditions. However, theoretical …
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FABRICATION OF POLYMER NANOFLUIDIC CHIPS WITH PROTON BEAM WRITING AND NANOIMPRINTING FOR DNA LINEARIZATION
… are required for biomedical experiments. Nanopatterning and fabrication methods for nanochannel devices are discussed with focusing on proton beam lithography, Ormostamp mold casting, nanoimprinting on PMMA and bonding procedures. Among various nanofabrication methods and chip substrate …
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Studying the glial cell response to biomaterials and surface topography for improving the neural electrode interface
… glial scar thickness. </p> <p>Results from the nanopatterning PMMA study prompted a more thorough investigation of the nanopatterning effects using an organotypic brain slice model. PDMS was utilized as the substrate due to its optimal physical properties. Confocal and SEM imaging illustrated …
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Harnessing Solid-State Ionic Transport for Nanomanufacturing and Nanodevices
… in the field of renew-able energy. With the nanopatterning technique developed, plasmonic features with resonance in the optical range have been fabricated to study their effect on the Surface Enhanced Raman Scattering as well as Metal Enhanced Fluorescence of an adsorbate. New insight into …
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Creation of 3-dimensional micro-optical materials
… this issue. Chapter 3 discusses proximity-field nanopatterning, a variation of interference lithography where a diffractive mask generates the beams of light that create the interference pattern. The design space of this technique is examined for a cubic lattice and multilevel phase masks are …
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Fluid dynamics of thin films in semiconductor manufacturing processes
… is the UVNIL. It is a promising high-resolution nanopatterning process and a key technique for the commercialization of nanostructure applications. However, the UVNIL suffers from low throughput. The bottleneck is the resist filling step, so the fluid flow in UVNIL has been studied extensively to …
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Origami nanofabrication of three-dimensional electrochemical energy storage devices
… devices using two- dimensional micro- and nanopatterning tools and techniques. The origami method of fabrication is a two-part process in which two-dimensional (2D) membranes are first patterned and then folded into the desired 3D configuration. This thesis presents an origami fabrication …
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Micro and Nano patterns for Biosensing: from enzymatic assays to single cells interaction arrays
… high-throughput and multiplexed Dip Pen Nanopatterning methodologies in liquid format were combined with Proteic Ligand DNA-Directed Immobilization for the creation of complex protein biochips on modified glass surfaces displaying spots of cell-specific ligands with lateral dimensions …
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