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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 5396 for “"Deposition"”.
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Low temperature carbon material deposition with photo-enhanced chemical vapor deposition
Photo-enhanced chemical vapor deposition (CVD) technique is investigated here for low temperature deposition of carbon nanotubes (CNTs) and hexagonal diamond. Most current deposition methods require high substrate temperature. Photo-enhanced CVD utilizes light energy to dissociate carbon containing …
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Femtosecond pulsed laser deposition
… two variations of the conventional pulsed laser deposition (PLD) technique. The first technique is femtosecond PLD, whereby the laser used to ablate the target has a significantly higher peak intensity and shorter pulse duration as compared to conventional nanosecond lasers more commonly used for …
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Electroless Atomic Layer Deposition
… surface. This poses an issue when very thin film deposition is required with 2D morphology and full coverage of deposit is desired. In this thesis, we propose a protocol for aqueous solution based thin film deposition where deposit thickness is precisely controlled down to a monolayer. We …
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Atomic layer deposition of photovoltaics
… have remained major challenges. Atomic layer deposition (ALD) is a low processing temperature technique capable of providing unrivalled thin-film conformality with uniform sub-nanometre thickness on large scale areas. Its use in depositing thin charge selective contacts as well as passivation …
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The Cumberland Basin of deposition
Thesis. (Ph.D.) Massachusetts Institute of Technology. Dept. of Geology, 1951.
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Nickel deposition on hydrodemetallation catalysts
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1993.
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The Analog Between Particle Deposition in a Pipe and Particle Deposition on a Flat Plate
Made available in DSpace on 2014-12-13T19:31:27Z (GMT). No. of bitstreams: 1 7616154.pdf: 4201185 bytes, checksum: 09f9fc915d1eede0453c680977cd0469 (MD5) Previous issue date: 1976
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Particle generation in a chemical vapor deposition/plasma-enhanced chemical vapor deposition interlayer dielectric tool
… the layer. In this study, particle generation, deposition, and adhesion mechanisms are reviewed. In particular, four important sources of interlayer dielectric particle contamination were investigated: the cleanroom environment, improper wafer handling, the backside of the wafer, and microarcing …
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Strategies for cells encapsulation and deposition
A computer aided manufacturing approach to encapsulate viable mammalian cells in hydrogels and use these capsules as the building blocks for scaffolds. A novel 3D capable contactless bioprinter is presented that encapsulates cells in a alginate hydrogel through an electro hydro dynamic process and …
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Chemical vapor deposition of polymeric films
… stability. In this project, chemical vapor deposition (CVD) and plasma enhanced chemical vapor deposition (PECVD) of carbon films with PPN structure using PTCDA as precursor were carried out under different conditions. There is only limited information in literature on the synthesis of PPN …
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Precursors for copper chemical vapor deposition
… copper films of high quality by chemical vapor deposition (CVD). We investigated some copper(I) and copper(II) complexes as precursors for chemical or photochemical vapor deposition. In chapter 2, we synthesized a series of Cu(hfac)<sub>2</sub>(amine) adducts, where hfac<sup>-</sup> is …
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Electroless deposition of group eight metals
Electroless plating is the controlled chemical reduction of metals without the use of an applied external potential. The use of electroless plating has a number of advantages over electroplating including the ability to deposit coatings onto complex-shaped objects which can be metallic or …
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Mechanism of ion beam induced deposition
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1990.
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Molten microdrop deposition and solidification processes
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
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Spray deposition of cork reinforced polyester
The objective of this research is to enable large part or high volume manufacturing processes to make consumer or industrial products from a cork reinforced polymer composite, similar to current applications of glass reinforced polyester. The low initial investment and high flexibility of the spray …
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Custom mechanisms for tunable material deposition
… an array of six unique customizable and compact deposition heads for tunable material properties. Amongst those tools is a freeform extrusion head for tunable geometry without the need for auxiliary support structure; a fast thread deposition head and a fiber winding head for tunable compressive …
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Advanced electrochemical characterization of copper deposition
The electrodeposition of copper metal in a concentrated sulfuric acid solution is reported to occur through a four-step mechanism: (I) the dehydration of Cu2+ (H2O)6, (II) the reduction of Cu2+ to cu+, (III) the dehydration cu+ (H2O)6-x, (IV) the reduction of Cu+ to copper metal. The dehydration …
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Sediment erosion and deposition within mangrove forests
… creates conditions that facilitate sediment deposition by enhancing drag and slowing currents near the bed. However, pneumatophores also generate turbulence that enhances turbulent kinetic energy (TKE), which can promote sediment resuspension. Two studies were conducted to better understand …
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Ion assisted deposition of multicomponent thin films
A novel in-situ stress measurement technique to study the formation kinetics of multi component oxide thin films was developed and was applied to PbTiO₃. Single phase PbTi 0₃ thin films were formed from the reaction between films in the deposited PbO ITi0₂ multilayer. The film stoichiometry was …
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Pulsed Laser Deposition of Thin Film Heterostructures
… Aluminate (100) substrates by pulsed laser deposition. X-ray diffraction results show that the films grown on the Strontium Titanate are amorphous and polycrystalline on the Lanthanum Aluminate. Resistances versus temperature measurements show that the films exhibit semiconducting …
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