Spontaneous growth and luminescence of si siox core shell nanowires
Spontaneous growth and luminescence of si siox core shell nanowires
... show that the nanowire consists of a crystalline Si core and an amorphous SiO x shell. There exist two major forms of nanowires possessing different morphologies and growth directions, which may ... different mechanisms predominate in the growth process. The photoluminescence of the Si/ SiO x core- shell nanowires presents two emission bands, around 550 and 600 nm,...
Ngày tải lên: 16/03/2014, 15:08
Multilevel modeling of the influence of surface transport peculiarities on growth, shaping, and doping of si nanowires
... shaping and selective doping of nanowires is possible by means of well-directed effects on the surface transport of both silicon and impurity adatoms. Some nonlinear effects in the growth and doping ... synthesis of NWs possessing a desired structure and properties remains a rather difficult problem so far. To determine the best conditions for the growth of NWs and fo...
Ngày tải lên: 16/03/2014, 15:18
Tài liệu Growth and Decline of the Economies of Europe and the US docx
... all the Inca and Maya gold and silver and ruled much of Mexico, Central and Latin America. Britain, France, Germany, Holland, Italy and Portugal colonized most of Asia and Africa and took complete ... Kenya, Uganda, Rhodesia (Zimbabwe), South Africa, Namibia, Nigeria, Jamaica and Trinidad and Tobago in the Caribbean Islands and Canada. France held parts of Canada...
Ngày tải lên: 21/02/2014, 14:20
The composition dependent mechanical properties of ge si core–shell nanowires
... volumes of the core and the shell, V core and V shell , we yield s zz ¼ V core V s zz core þ V shell V s zz shell , (5) where s zz core and s zz shell are the stresses of the core and the shell, ... deposition method successfully [5]. Later on, Musin and Wang [11, 12] studied the composition- and size-dependent band gaps of Ge- core /Si- shell and...
Ngày tải lên: 16/03/2014, 15:22
Báo cáo khoa học: Methylcitrate synthase from Aspergillus fumigatus Propionyl-CoA affects polyketide synthesis, growth and morphology of conidia ppt
... was produced and sequenced (Accession No. AJ888885). Comparison of genomic and cDNA revealed two introns with a size of 58 and 64 bp. Removal of the introns led to an open reading frame of 465 amino acids ... polyketide synthesis, growth and morphology of conidia Claudia Maerker 1 , Manfred Rohde 2 , Axel A. Brakhage 3 and Matthias Brock 1,3 1 Institute of Microbiology...
Ngày tải lên: 23/03/2014, 15:20
hydrothermal growth and characterizations of dandelion-like zno
... crys- tallite sizes of nanomaterials, the band edge emission peak of photoluminescence (PL) and absorption/transmission peak of UV–visible spectra will be blue or red shifted, known as the quan- tum size ... emission of ZnO nanomate- rials is liable to be quenched and only defect emissions in visible region are detected [38,39]. This limits the progress and use of ZnO in optoe...
Ngày tải lên: 06/05/2014, 13:24
Effect of substrate temperature on spontaneous gan nanowire growth and optoelectronic properties
... GaN and silicon nitride on the major part of the Si surface. The formation of amorphous silicon nitride layer has been previously reported by Kim et al. and Grandal et al. [5–15] After MBE growth ... NWs is of the order of 10 19 cm À3 . In conclusion, we have studied the effect of growth tempera- ture on GaN NW morphology. SEM results revealed that the density, diameter a...
Ngày tải lên: 16/03/2014, 15:15
Tài liệu Growth and nutritional status of children with homozygous sickle cell disease ppt
... co-enzyme of vitamin B 6 ) showed that 77% were below the reference cut-off, and there were significant positive associations between PLP levels and BMI Z-scores, weight and MUAC. 111 Reduced levels of ... Ansari B. Decreased bone mineral density in prepubertal children with sickle cell disease: correlation with growth parameters, degree of siderosis and secretion of growth...
Ngày tải lên: 12/02/2014, 19:20