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 17 of 17 for “"Nanomembranes"”.
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Molecular Separation and Power Generation by Carbon Nanomembranes
… First, a regular synthesis of carbon nanomembranes (CNMs) from thiol molecules and a facile fabrication of CNMs from polycyclic aromatic hydrocarbons (PAHs) are illustrated. The thickness of pyrene CNMs can be controlled between 3.0 to 6.5 nm by varying the residence time in the …
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Elastic properties of Carbon nanomembranes and graphene: theory and experiment
The Young's modulus and 2D modulus of CVD graphene and different kinds of CNMs was investigated by the Bulge Test and AFM nanoindentation. A detailed theoretical description of Bulge Test and nanoindentation is given and the accuracy of the mathematical models is estimated.
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Three-dimensional nanostructures fabricated by stacking pre-patterned monocrystalline silicon nanomembranes
… connected counterparts. Initially, connected nanomembranes patterned in a thin layer of silicon on glass were released in hydrofluoric acid where surface tension caused them to float flat. Their fragility inspired novel handling and position manipulation techniques for layer-to-layer …
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The effect of surface roughness on thermal and acoustic phonon transport in nanowires and nanomembranes
… theory. This work investigates Si nanowires and nanomembranes with characteristic sizes smaller than 200 nm. Using a MEMS-based measurement platform, we observe the low-temperature dependence of thermal conductivity in silicon nanowires fabricated using a two-step, metal-assisted chemical etch. …
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Materials and design strategies for flexible electronics
… assemblies of single-crystalline semiconducting nanomembranes on plastic substrates appear to be quite promising because it can catch two hares at once; mechanical flexibility and high electronic performances. This thesis is focused on materials and design strategies to realize complex integrated …
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Plasmonic Optical Sensors: Performance Analysis and Engineering Towards Biosensing
… plasmonic optical fibers and freestanding nanomembranes. (1) Periodic nanohole arrays are patterned on chip by a simple and robust template-transfer approach. A spectral analysis approach is also developed for improving the sensor performance. This sensor is applied to demonstrate the …
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Alignment and actuation of compliant nanostructures and diffractive optics by inter-nanomagnet forces
… method is applied for precise self-alignment of nanomembranes with applications in three-dimensional nanostructures manufacturing as well as distortion and patterning errors correction in a promising unconventional way. The second application addressed in this work shows the ability of …
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Three-dimensional (3D) electronics by compressive buckling process
… process. Highly phosphorus doped silicon nanomembranes from a silicon-on-insulator wafer are transfer-printed onto the 3D structures and introduce changes of the electrical properties under compressive strain. A commercial chip from X-FAB Semiconductor Foundries is successfully placed onto …
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Utilizing Nanoporous Alumina Membranes for Molecular Transport and Silica Nanotube Synthesis
Alumina-based nanomembranes with pores of ̃200 nanometers in diameter were modified with a variety of different substituted silanes. The transport of ions through these treated membranes was studied using several analytical tools such as ultraviolet-visible and fluorescence spectroscopy. The …
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Materials and designs for 3D conformal electronics with capabilities in cardiac mapping and stimulation
… composite for tactile sensors, silicon nanomembranes for strain gauges, iridium oxide for pH sensors, gallium nitride and gallium arsenide for optoelectronics, metal thin films for temperature sensing, and nanotextured electrode coatings for characterizing electrical activities. Careful …
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Materials for bioimplantable / bioresorbable electronics
… investigate chemical stabilities of thin nanomembranes of silicon and thermally grown silicon dioxide in biofluids for their provisioned importance as a thin film water barrier in implantable flexible electronics. The different materials dissolution rates in silicon and its oxide provide …
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Fabrication of Hybrid Optical Electrical Platforms for Potential Applications in Neuromodulation
… developed based on inorganic thin films, i.e., nanomembranes (NMs) formed in ordered arrays of buckled channels on com- pliant substrates. The buckled NMs include light-emitting structures in the visible range (namely Si nano-crystals) and graphene electrodes to control and record neu- ral …
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Characterization of Dopant Diffusion in Bulk and lower dimensional Silicon Structures
… the dopant diffusion mechanisms in Silicon nanomembranes (2D), nanoribbons (â 1.Xâ D), and nanowires (1D). This study also attempts to benchmark the 1D and 2D diffusion against the well-known bulk (3D) diffusion mechanisms.
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Putting the Needle to the Haystack: Submolecular Structure Elucidation with Atomic Force Microscopy in Ultra High Vacuum
… layer forms an amorphous membrane. These carbon nanomembranes possess remarkable properties like selective permeation. Since the exact origin of this extraordinary high water permeation was so far unknown, this work aims at directly imaging pores that shall give these membranes their properties. …
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Multifunctional wearable fingertip electronics
This thesis describes the device designs, fabrication methods and the results of simulations and tests for a class of electronics capable of integration onto the inner and outer surfaces of thin, elastomeric sheets in closed-tube geometries, specially formed for mounting on fingertips. …
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Application of self-rolled-up membrane technology for enhanced neuron guidance and alignment
Neural circuits are fundamental components that regulate critical autonomic functions throughout the human body. Disruption of neural circuits, through neurodegenerative diseases such as Parkinson’s disease or multiple sclerosis, as well as sensory neuropathies, and traumatic injuries can be …