Download or read book Structural Characterization of Germanium and Gold Germanium Nanoclusters Embedded in Silica written by Julian Guzman and published by . This book was released on 2011 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fabrication and structural characterization of ion beam synthesized Ge and Ge-Au nanoclusters embedded in silica is presented. The theory of nanocluster size distribution from ion beam synthesis is discussed and a processing route to narrow the size distribution is investigated. Transmission electron microscopy is used to determine the size distribution of ion beam synthesized Ge nanoclusters embedded in silica. It is demonstrated that implantation at room temperature, liquid nitrogen (LN2) or ramping temperature, i.e., half dose at LN2 temperature immediately followed by half dose at increasing temperature until room temperature is reached, results in a narrow size distribution of particles. However, it is determined that post-growth thermal annealing broadens the size distribution regardless of the implantation condition. High resolution transmission electron microscopy is used to evaluate the crystallinity of the nanoclusters before and after thermal annealing. Ge-Au nanoclusters embedded in silica are fabricated by co-sputtering Au and silica followed by Ge implantation and thermal annealing. Scanning transmission electron microscopy, Raman spectroscopy, and synchrotron X-ray diffraction are used to demonstrate a reversible phase transition in the system. The bi-lobe structure observed after annealing is switched to a homogeneously mixed structure using a 30 ns UV laser pulse. The structure is switched back to bi-lobe by heating at 80 oC. The bi-lobe/homogeneously mixed switching can be performed at least 10 times. The phases present in the bi-lobe and homogeneously mixed structures are evaluated by synchrotron X-ray diffraction. The melting behavior of the Ge-Au nanoclusters is explored by in-situ transmission electron microscopy.
Download or read book Characterization of Silicon and Germanium Nanoparticles written by Jimmy Yi-Jie Jia and published by . This book was released on 2002 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstructural and Photuminescence Characterisation of Germanium and Silicon germanium Nanocrystalline Materials written by Giray Kartopu and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ion Beams in Materials Processing and Analysis written by Bernd Schmidt and published by Springer Science & Business Media. This book was released on 2012-12-13 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive review of ion beam application in modern materials research is provided, including the basics of ion beam physics and technology. The physics of ion-solid interactions for ion implantation, ion beam synthesis, sputtering and nano-patterning is treated in detail. Its applications in materials research, development and analysis, developments of special techniques and interaction mechanisms of ion beams with solid state matter result in the optimization of new material properties, which are discussed thoroughly. Solid-state properties optimization for functional materials such as doped semiconductors and metal layers for nano-electronics, metal alloys, and nano-patterned surfaces is demonstrated. The ion beam is an important tool for both materials processing and analysis. Researchers engaged in solid-state physics and materials research, engineers and technologists in the field of modern functional materials will welcome this text.
Download or read book Properties of Silicon Germanium and SiGe Carbon written by Erich Kasper and published by Inst of Engineering & Technology. This book was released on 2000 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: The industrial relevance of SiGe has increased dramatically in the last few years with the manufacture of heterojunction bipolar circuits for the commercial wireless and datacomms markets by IBM and TEMIC. Major high technology companies see the development and use of SiGe as an important part of their strategy, so that there is a strong impetus to improve its characterization and exploitation. This liberally illustrated and fully indexed volume distills in a homogeneous, structured way the expertise of some 40 invited authors to comprehensively review the whole range of properties as well as SiGe; C, self-assembled nanostructures, quantum effects and device trends.
Download or read book Germanium and gold wire arrays embedded in silica photonic crystal fibers written by Hemant Kumar Tyagi and published by . This book was released on 2010 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Silicon and Germanium Nanowires Silica Nanotubes and Germanium Telluride tellurium Nanostructures written by Hsing-Yu Tuan and published by . This book was released on 2007 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heterostructured nanomaterials are interesting since they merge the properties of the individual materials and can be used in diverse applications. GeTe/Te heterostructures were synthesized by reacting diphenylgermane (DPG) and TOP-Te in the presence of organic surfactants. Aligned Te nanorods were grown on the surface facets of micrometer-size germanium telluride particles.
Download or read book Characterization of atomic transport in nano structured silicon and germanium to reveal properties of self and foreign atom defects written by Tobias Südkamp and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Germanium and Gold Wore Arrays Embedded in Silica Photonic Crystal Fibers written by Hemant Kumar Tyagi and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigations Into the Electronic Structure Og Germanium Nanoislands Embedded in Silicon written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Properties of Silicon Germanium and SiGe written by Erich Kasper and published by Inst of Engineering & Technology. This book was released on 1999-12 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: The industrial relevance of SiGe has increased dramatically in the last few years with the manufacture of heterojunction bipolar circuits for the commercial wireless and datacomms markets by IBM and TEMIC, with over 20 companies planning manufacture in the near future. Major high technology companies see the development and use of SiGe as an important part of their strategy, so that there is a strong impetus to improve its characterization and exploitation. This liberally illustrated and fully indexed volume distils in a homogeneous, structured way the expertise of some 40 invited authors to comprehensively review the whole range of properties as well as SiGe: C, self-assembled nanostructures, quantum effects and device trends. The book contains 75% more text than Prof. Kasper's earlier book Properties of strained and relaxed SiGe (INSPEC, IEE, 1995), thoroughly updates its content and adds many new topics.
Download or read book The Synthesis and Characterization of Germanium Nanoparticles and Nanowires and the Study of Their Potential in Photovoltaics written by Stephen Corey Codoluto and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increasing energy demand of an overpopulated society has bolstered the interest in exploring renewable energy forms, one of which is solar energy. Current solar cell technology is neither an efficient nor cost-effective alternative to currently used fossil fuels. Nanostructured semiconductor building blocks are expected to play a central role in the development of next-generation cost-effective solar cell technology. Among the various materials that have been explored and studied, Ge holds particular promise due to it favorable band gap and good transport characteristic. A method to produce colloidal Ge nanocrystals, however, has not yet been established. Colloidal synthesis provides a scalable and cost-effective route to nanocrystalline semiconductor material as building blocks in low-cost PV energy conversion devices. This work describes the synthesis and characterization of Ge nanoparticles and Ge nanowires and their potential applications. Ge nanoparticles, 1.9 - 16.0 nm, are synthesized via colloidal synthesis by reducing germanium iodide using a strong reducing agent in various coordinating solvents. The effects of reaction and injection temperature, reaction time, and initial concentration are studied. A minimum temperature of 250 °C is required to crystallize Ge in a colloidal synthesis, below which only amorphous material is formed. An increase in reaction temperature from 250 to 300 °C has little effect on the final nanocrystal size and structure. A temperature of 200 °C was found to minimize crystal growth defects. Increasing or decreasing the injection temperature increased the crystal defects. The final crystalline products are analyzed using XRD, FTIR, TEM, HR-TEM, SEM, UV-vis spectroscopy, and PL to study oxidation, crystal structure, and optical properties. Spin coated germanium nanoparticles are combined with sputtered a-Si to create a polysilicon-Ge matrix which could direct charge transfer and decrease recombination of photogenerated charges. As a complementary nanocrystalline Ge building block nanowires were also synthesized by the thermal decomposition of DPG and TMG in supercritical hexane using a batch and a semicontinuous supercritical reactor. Up to 210 mg are synthesized and collected using this process with a diameter range of 20 nm to 60 nm and lengths up to 15 [MICRO SIGN]m. The continuously grown nanowire experimental yield is ~35%, compared to the batch experimental yield of 15%. The Ge nanowires were easily extracted from the collection vessel and characterized using TEM, SEM, and XRD to confirm the presence of Ge and to study the structure of the wires.
Download or read book Multiscale Modeling of Formation and Structure of Oxide Embedded Silicon and Germanium Nanocrystals written by Decai Yu and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Germanium Nanowires and Germanium silicon Radially Heterostructured Nanowires written by Irene Anne Goldthorpe and published by . This book was released on 2009 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electrical Characterization of Germanium silicon Alloy written by Kumar P. Kishore and published by . This book was released on 1994 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dekker Encyclopedia of Nanoscience and Nanotechnology written by James A. Schwarz and published by CRC Press. This book was released on 2004 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
