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 9 of 9 for “"atom beam"”.
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Studies of diamond film growth using atom beam sources
… and diamond substrates. A well characterised<br/>atomic hydrogen source developed in this laboratory is positioned at right angles to a carbon sputter source, which has been characterised using a quartz crystal monitor. Substrates are positioned at 45° to the two sources on a molybdenum holder …
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Tune-out Wavelength Measurement and Gyroscope Using Dispersion Compensation in an Atom Interferometer
… how I used a three nanograting Mach-Zehnder atom beam interferometer to precisely measure a wavelength of light, known as a tune-out wavelength, that causes zero energy shift for an atom. I also describe how such measurements can be remarkably sensitive to rotation rates. It is well known …
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Optical manipulation of helium(2(3)S) atoms with a diode laser
… has been used to efficiently spin polarize an atomic beam of He(2$\sp3$S) metastable atoms by optical pumping on the $\rm 2\sp3S\sb1\rightarrow2\sp3P\sb1$ (D1) transition. The diode laser is an InGaAs/GaAs strained multiquantum well with a distributed Bragg reflector to insure single …
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Optimization of Reactive Ion Etching to Fabricate Silicon Nitride Stencil Masks in SF6 Plasma
… ultra-high resolution patterns using helium ion/atom beam lithography and are often manufactured from thin, free-standing silicon nitride membranes. The masks have sub-200nm openings etched through the thickness of the membrane using a reactive ion etch (RIE) process that determine the printed …
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Bottlebrush Polymers: A Pathway to Engineering Surfaces and Interfaces
… bottlebrush networks that were crosslinked using atom beam lithography. We found that swelling declines as the number of side-chains is increased, which is consistent with a simple Flory model for equilibrium swelling of networks.
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Supramolecular organisation, conformation and electronic properties of porphyrin molecules on metal substrates
… exposing a layer of well-ordered TPyP to an iron atom beam, demonstrating a novel approach towards the fabrication of metallo-tetraaryl porphyrins performed in two dimensions under ultrahigh vacuum conditions. This method was similarly used to form lanthanideporphyrinates by coordinating …
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Instrumentation and contrast mechanisms in scanning helium microscopy
… that uses low energy (5-100 meV) helium atoms to image the surface of a sample. Since helium is inert and neutral, it can be used to study delicate and insulating surfaces, but that also means it can be difficult to manipulate for focussing and detection. The first reflection mode helium …
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Microfabricated Surfaces and Particles for Advanced Immunoassay Platforms and High-Efficiency Electrowetting Heat Transfer System
… activated through the exposure to a helium atom beam, which is subsequently functionalized with anti-hCG antibodies. The positive sample microcubes that have been functionalized with anti-hCG and incubated with hCG, showed selective binding on the anti-hCG stripe. On the other hand, the …
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Návrh efuzní cely pro depozici ultratenkých vrstev Al
Tato bakalářská práce se zabývá návrhem efuzní cely pro tvorbu ultrathenkých vrstev hliníku v podmínkách ultravysokého vakua. Byly navrhnuty dvě varianty lišící se typem ohřevu. První využívá energie urychlených elektronů, druhý tepelné záření. Zbylé části cel jsou plně zaměnitelné.