T1 - Deposition of nanocrystalline silicon films at room temperature
Janik: "Convenient synthesis of nanocrystalline powders of phase-pure manganese nitride n-Mn3N2", J.
Synthesis of nanocrystalline silicon ..
Deposition on a cold or heated surface of a substrate allows making films and coatings, i.e., continuous layers of a nanocrystalline substance not more than several micrometers thick. Films may have different compositions and the size of their crystallites may change over a wide interval including the amorphous state and multilayer structures (superlattices). Pressing is not necessary because a bulk layer of a nanomaterial is obtained.
AB - Interest in the synthesis of semiconductor nanoparticles has been generated by their unusual optical and electronic properties arising from quantum confinement effects. We have synthesized silicon and germanium nanoclusters by reacting Zintl phase precursors with either silicon or germanium tetrachloride in various solvents. Strategies have been investigated to stabilize the surface, including reactions with RLi and MgBrR (R = alkyl). This synthetic method produces group IV nanocrystals with passivated surfaces. These nanoparticle emit over a very large range in the visible region. These particles have been characterized using HRTEM, FTIR, UV-Vis, solid state NMR, and fluorescence. The synthesis and characterization of these nanoclusters will be presented.
Synthesis of nanocrystalline silicon in the system La…
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Nanocrystalline cementite, silicon carbide and titanium carbide powders were prepared from elemental constituent powder particles by reaction milling. A high energy dual drive planetary mill has been fabricated for the synthesis of carbides. The strong collision energy field of the dual drive planetary mill reduced the carbide formation time as compared to earlier reported studies. Forty hours is required to produce nanocrystalline cementite and silicon carbide powder. Whereas only 10 hours is required to produce titanium carbide powder, because self propagating reaction takes place between Ti and graphite during milling. The morphology of powders and evolution of different phases were studied by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
Synthesis of nanocrystalline silicon in the system La-Si …
Wells: „An Alternative Synthesis of Cyclotrigallazane, [H2GaNH2]3, a Precursor to Nanocrystalline, Phase-Inhomogeneous Gallium Nitride, GaN”,
Olejniczak: „Silicon carbide modified carbon materials. Formation of nanocrystalline SiC from thermochemical processes in the system coal tar pitch/poly(carbosilane)”,
Synthesis of nanocrystalline silicon carbide using the …
Thermoelectric Properties of Nanocrystalline Silicon …
Nanocrystalline silicon carbide (SiC) with a diameter of 7 nm was synthesized in a high voltage electrical explosion
Thermoelectric Properties of Nanocrystalline Silicon from a Scaled ..
A solution of sugar in silica sol was used as parent material for the manufacture of nanocrystalline SiC powders
Nanocrystalline silicon - Revolvy
Preparation of Nanocrystalline Silicon from SiCl 4 at 200 °C in Molten ..
05.04.2014 · The term Nanocrystalline silicon ..
Twardowski: „Magnetic and optical properties of (GaMn)N nanocrystalline powders prepared by the aerosol-assisted vapour phase synthesis and anaerobic imide route methods",
US8404313B1 - Synthesis of nanocrystalline diamond …
semiconductor-based, nanocrystalline fluorescent markers for cell and intracellular detection and analysis; therapeutic compounds and procedures for the diagnosis and treatment of cancer; and the very innovative OptiCell ®, a product that represents a significant step forward in the evolution of cell and tissue culture technology."BioForce Nanosciences"...
Nanocrystalline Materials: Synthesis and Properties Part …
The microstructure of submicrocrystalline substances, which are synthesized using severe plastic deformation, differs from the microstructure of compacted nanocrys-talline substances. The main feature of the structure of submicrocrystalline substances is the presence of randomly misoriented nonequilibrium grain boundaries.
Apr 05, 2014 · The term Nanocrystalline silicon ..
Fig. 12 Two-dimensional schematic model of a nanocrystal-line material with microscopic free volumes as detected by positron lifetime spectroscopy: (From Ref.  ) vacancy-like free volumes (with positron lifetime tj) in the interface, nano-voids (agglomerates of about 10 vacancies) at the triple junction of crystallites (t2), and a large void (t3) of the size of missing crystallites.
Ordering and self-organization in nanocrystalline silicon
Considerable study currently devoted to crystallization of amorphous alloys in connection with development of soft magnetic materials in Fe-Cu-M-Si-B (M=Nb, Ta, W, Mo, or Zr) systems. Amorphous alloys of the Fe-Cu-Nb-Si-B system proved to be most successful. Their crystallization at 700-900 K resulted in formation of a uniform nanocrystalline structure. Grains of the a-Fe(Si) phase ~ 10 nm in size and copper clusters about 1 nm in size were uniformly distributed in the amorphous matrix of the alloy.
Hydrogenated nanocrystalline silicon thin film prepared …
and and (2011) Synthesis and characterization of nanocrystalline carbides By reaction milling. In: VI International Conference on Mechanochemistry and Mechanical Alloying (INCOME 2008), 1-4 December 2008, NML Jamshedpur, India.
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