Search for dissertations about: "metal assisted chemical etching"

Found 5 swedish dissertations containing the words metal assisted chemical etching.

  2. 1. Metal-assisted chemical etching for nanofabrication of hard X-ray zone plates

    Author : Rabia Akan; Ulrich Vogt; Muhammet Toprak; Carmen Vogt; Lucia Romano; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; metal-assisted chemical etching; zone plate; high-aspect ratio; silicon; nanostructures; Material and Nano Physics; Material- och nanofysik; Optik och fotonik; Optics and Photonics;

    Abstract : Hard X-ray scanning microscopes, or nanoprobes, make it possible to image samples and probe their chemical, elemental and structural properties at nanoscale resolution. This is enabled by the use of nanofocusing optics. Commonly used optics in nanoprobes for high resolution X-ray experiments are zone plates. READ MORE

  4. 2. High-Aspect Ratio Nanofabrication for Hard X-Ray Zone Plates

    Author : Karolis Parfeniukas; Ulrich Vogt; Hans Hertz; Anne Sakdinawat; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nanofabrication; x-ray optics; zone plate; tungsten; silicon; reactive ion etching; metal-assisted chemical etching; Ronchi test; Fysik; Physics;

    Abstract : Hard x-ray nanoimaging enables structural investigations of new materials for many applications. For high-resolution experiments, zone plate x-ray optics are commonly chosen.Two methods of zone plate nanofabrication are presented in this thesis.Zone plates are circular diffraction gratings with radially decreasing grating period. READ MORE

  5. 3. Dynamics of a Droplet that Assists III-V Nanowire Growth

    Author : Marcus Tornberg; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Crystal growth; III-V semiconductor nanowires; Environmental transmission electron mircoscopy; MOCVD; X-ray energy-dispersive spectroscopy; Fysicumarkivet A:2020:Tornberg;

    Abstract : Control of the process of crystal growth has for decades been achieved by addressing the growth temperature and material supply of the growth species. Directional control of both crystal growth and etching has, for example, been achieved by utilizing a liquid droplet to assist the process. READ MORE

  6. 4. Investigation of New Concepts and Solutions for Silicon Nanophotonics

    Author : Zhechao Wang; Lech Wosinski; Kresten Yvind; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Planar integrated circuit; silicon photonics; slot waveguide; finite-difference time-domain; waveguide grating coupler; ring resonator; polarization diversity scheme; polarization beam splitter; polarization rotator; hybrid silicon laser; epitaxial lateral overgrowth; chemical-mechanical polishing.; Optics; Optik;

    Abstract : Nowadays, silicon photonics is a widely studied research topic. Its high-index-contrast and compatibility with the complementary metal-oxide-semiconductor technology make it a promising platform for low cost high density integration. READ MORE

  7. 5. Nanofabrication processes for high-aspect ratio X-ray zone plates

    Author : Hanna Ohlin Ohlin; Ulrich Vogt; Matias Kagias; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik;

    Abstract : The field of nanofabrication is vast, and there are many methods available to facilitate the fabrication of different types of structures. Nanostructured materials make up critical infrastructure in fields like medical technology, energy storage and production, computer science and more. READ MORE