nanocrystals embedded in waveguides tomáš ostatnický martin rejman jan valenta kateřina herynková and ivan pelant
Báo cáo hóa học: " Optical characterisation of silicon nanocrystals embedded in SiO2/Si3N4 hybrid matrix for third generation photovoltaics" doc
Ngày tải lên :
20/06/2014, 23:20
... The Netherlands) using Cu Ka radiation (l = 0.154 nm), operating at a voltage of 45 kV and a current of 40 mA (The results are shown in Figure 2) The primary optics was defined by using a 1/16° ... The band gaps are of indirect nature, as g = 1/2 is used to obtain the linearised spectra [17,18] The estimated first indirect gaps are 1.90 eV, 1.95 eV and 1.84 eV for undoped, B-doped and P ... uncertainty in the analysis However, the absorption curves in this region generally follow a square-root dependence Thus by taking g = in the generalised Tauc analysis (Figure 4d), we obtain x-intercepts...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 1
Ngày tải lên :
14/09/2015, 14:04
... between 300 to 500 cm-1, with increase in annealing temperature due to the localized Si-Si optic mode in near vicinity of Ge atoms The random introduction of Ge atoms into an initially pure Si crystal ... that annealing in N2 ambient up to 1000°C resulted in relatively featureless spectra, indicating that no Ge nanocrystals has been formed However, when the sample was annealed in forming gas, a ... well-formed single crystalline Ge nanocrystal There also exists a region that is void of nanocrystals between the substrate and a band of nanocrystals in the bulk of the film The large nanocrystals...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 2
Ngày tải lên :
14/09/2015, 14:04
... minutes Further increase in the annealing duration to 60 minutes resulted in the disappearance of such peak It should be pointed out here that annealing Sample C at 900°C and beyond resulted in ... observed indicating the presence of Ge nanocrystals in the HfAlO matrix However, at higher annealing temperatures (i.e 900 and 1000°C), no Ge peak can be detected Note that increasing the annealing ... crystalline Ge Raman peak at annealing temperatures ranging from 700 to 1000°C after annealing for 15 minutes Figure 4.8 reveals that a 15 minutes annealing at 800°C resulted in the formation of nanocrystals...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 3
Ngày tải lên :
14/09/2015, 14:04
... annealing time was increased from 15 to 60 minutes As such, the nanocrystals would grow and increase in number as the annealing duration increases, which causes an increase in P shown in Figure 6.5 ... (P) experienced by Ge nanocrystals embedded in silicon oxide matrix from Sample A and annealed for 15 and 60 minutes in forming gas (10% H2, 90% N2) as a function of annealing temperature Beyond ... the nanocrystals embedded in silicon oxide and free-standing Ge nanocrystals respectively, and ω0 is the Raman peak position of bulk Ge, γ = 0.89 cm-2 is the mode-Grüneisen parameter [8], S11 and...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 4
Ngày tải lên :
14/09/2015, 14:04
... minimize their strain energy and thus minimize stress for the nanocrystals At 1000°C, the Ge atoms would become molten and lose their atomic ordering This resulted in a significant increase in ... Luan and L C Kimerling, “Strain-induced band gap shrinkage in Ge grown on Si substrate”, Appl Phys Lett., vol 82, pp 2044-2046, 2003 [3] L K Lam, S Chen and D G Ast, “Kinetics of nickel-induced ... Ge nanocrystals will be analyzed using Equation 6.1 highlighted in Section 6.3 7.2 Influence of the Annealing Technique In order to examine the effects of annealing technique on the growth and...
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Synthesis and stress analysis of germanium nanocrystals embedded in dielectric matrices 5
Ngày tải lên :
14/09/2015, 14:04
... discussed in the following sections 8.4 Synthesis of Ge nanocrystals in U-shape groove In order to minimize the shadowing effect and make a relatively conformal film deposition, the KOH etching process ... inevitably cause the shadowing effect and results in the thicker film on the mesa and thinner film inside the groove It is well established that thermal annealing of Ge and silicon oxide system ... laser interference lithography Synthesis of Ge nanocrystals in V-shape groove The SiO2 + Ge thin film was firstly deposited in the V-shape groove by the co-sputtering a SiO2 + Ge target in argon...
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Effect of periodic suction on three dimensional flow and heat transfer past a vertical porous plate embedded in a porous medium
Ngày tải lên :
05/09/2013, 14:58
... his M Sc degree in Physics from Utkal University, Orissa (India) in 1982 and obtained his Ph D degree in Physics from the same University in 2002 He served as a Faculty of Physics in Nayagarh (Autonomous) ... Orissa (India) from 1982-2004 and presently working as the Head of the faculty of Physics in KBDAV College, Nirakarpur, Orissa (India) since 2004 He has 27 years of teaching experience and 10 ... sign in the above equation indicates that the suction is towards the plate Due to this kind of injection velocity the flow remains three dimensional All the physical quantities involved are independent...
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báo cáo hóa học:" Implantation of neural stem cells embedded in hyaluronic acid and collagen composite conduit promotes regeneration in a rabbit facial nerve injury model" doc
Ngày tải lên :
18/06/2014, 15:20
... days in 4% paraformaldehyde and embedded in paraffin Sections were de-waxed and stained with haematoxylin and eosin for histological examination Toluidine blue staining was performed to assess ... poly-L-ornithine- and laminin-coated coverslips displaying a microglial morphology derived Immunofluorescence staining of β-tubulin, glial fibrillary acidic protein (GFAP) and galactocerebroside (GalC) in ... Immunohistochemical staining of BrdU and S-100 was performed to track the homing of NSC and to mark nerve fibers in the facial muscles of injured rabbits with and without reconstruction Paraffin -embedded muscle...
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Báo cáo hóa học: " Mixed convective boundary layer flow over a vertical wedge embedded in a porous medium saturated with a nanofluid: Natural Convection Dominated Regime" pdf
Ngày tải lên :
21/06/2014, 05:20
... plate in a fluidsaturated porous medium Gorla and Tornabene [7] and Gorla and Zinolabedini [8] solved the nonsimilar problem of free convective heat transfer from a vertical plate embedded in a ... Figures and as Nt and Nb vary Figure illustrates the variation of velocity within the boundary layer as Le increases The velocity increases as Le increases As Le increases, the temperature and concentration ... manuscript Author details Cleveland State University, Cleveland, OH 44115 USA 2Manufacturing Engineering Department, The Public Authority for Applied Education and Training, Shuweikh 70654, Kuwait...
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Báo cáo hóa học: " The role of the surfaces in the photon absorption in Ge nanoclusters embedded in silica" potx
Ngày tải lên :
21/06/2014, 05:20
... localized at the interface between Ge QDs and the hosting matrix Experimental Ge QDs embedded in silica have been obtained by magnetronco-sputtering of SiO2 and Ge targets (Ar atmosphere,nominal deposition ... glancing-incidence X-ray diffraction (GI-XRD) analysis, using the Ka radiation of Cu (l = 0.154 nm), fixing the incidence angle at 0.5° and performing the 2θ scan Basing on the (111), (110), and ... [20] The inset in Figure 1b reports an HR-TEM image of the annealed sample, evidencing a clear crystalline phase for Ge QD with the fringes due to crystalline planes (indicated by red lines and separated...
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Báo cáo hóa học: " Electrical behavior of multi-walled carbon nanotube network embedded in amorphous silicon nitride" potx
Ngày tải lên :
21/06/2014, 06:20
... network embedded in PMMA is explained by a combination of Sheng’s fluctuation induced tunneling and 1D variable range hopping models [20] Percolation in a 2D MWCNT network [24] is strongly influenced ... using mechanical polishing and ion thinning in a Gatan PIPS device Electrical measurements were performed in a Janis CCS-450 cryostat at room temperature (298 K) and low temperature (20 K), using ... of sharp and equal current steps, in contrast to metal wires that fail continuously and in accelerating mode The percolation phenomena in films with MWCNTs are extensively investigated in the literature,...
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Báo cáo hóa học: " Avoiding Loss of Catalytic Activity of Pd Nanoparticles Partially Embedded in Nanoditches in SiC Nanowires'''' doc
Ngày tải lên :
22/06/2014, 00:20
... of fresh (a) and used (c) catalyst (etching at 85°C for 30 min) showing that the Pd nanoparticles can easily migrate and grow in the calcination process whereas remain their size during the reaction ... metal nanoparticles and SiC support In other words, the metal particles migrate and grow easily on the inert SiC surface, and therefore decreasing the catalyst stability Since industrial powder-like ... 10-nm-thick fins standing on the nanowires, and the nanoditches between neighboring fins are obviously deeper than the 60°C etched and have a size of about 20 nm The Pd particles embedded in these nanoditches...
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Báo cáo hóa học: " Research Article Adaptive Probabilistic Tracking Embedded in Smart Cameras for Distributed Surveillance in a 3D Model" doc
Ngày tải lên :
22/06/2014, 22:20
... tracking and person handover itself, and the integration of all cameras’ tracking results in one consistent model We present two consecutive systems to come closer to this vision First, in Section ... capable of embedded probabilistic real-time object tracking in image domain Due to the embedded and decentralized nature of such a vision system, besides real-time constraints, the robust and fully ... For increased computational efficiency, the tracking directly runs on the raw and thus still Bayer colorfiltered pixels exist Instead of first doing expensive Bayer demosaicing and finally only using...
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Báo cáo hóa học: " Research Article Design Considerations for Scalable High-Performance Vision Systems Embedded in Industrial Print Inspection Machines" potx
Ngày tải lên :
22/06/2014, 22:20
... stages In this context, several kinds of pipelining have to be distinguished (i) Cycle pipelining That is, pipelining based on the cycle time of the production process which means pipelining as ... complex pipeline tasks from Figure by simple image processing stages For example, a pipeline containing a stage for applying a pixel offset and scaling, followed by two stages implementing different ... Processing module Camera interface FPGA High-speed input link (from other PMs) GBE High-speed output link (to other PMs) Ring node Memory GBE interface DSP Figure 4: Processing module processing...
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Báo cáo hóa học: " Optimal Detector for Multiplicative Watermarks Embedded in the DFT Domain of Non-White Signals" pptx
Ngày tải lên :
23/06/2014, 01:20
... p2 Using the equation sin 1/2(N + 1)a sin[Na/2] , sin(a/2) sin(na) = 0, n=1 N a = 2lπ, a = 2lπ, (A.5) and following the same procedure, we end up in the following equation: and splitting ... Researcher in the Artificial Intelligence and Information Analysis Group at the Department of Informatics at Aristotle University of Thessaloniki His research interests include image and signal processing ... S(k), respectively As mentioned in the introduction, the watermark embedding is performed in the Fourier domain and more specifically in its magnitude Thus, starting from the magnitude of the Fourier...
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Báo cáo toán học: "On the connectivity of graphs embedded in surfaces II" docx
Ngày tải lên :
07/08/2014, 07:21
... path joining u and w by using vertices in Ψ Similarly, for u and w both in Ψ , it is easy to construct m − disjoint paths joining them So it will suffice to consider the case with u is in Ψ and w ... number of vertex-disjoint paths between u and w First suppose k = 2, If u and w are both in Ψ, then there exist m − disjoint paths joining them in Ψ since Ψ is an embedding of Km−1 It is easy ... graphs and embeddings constructed in Section As before, let m = 12s + k and assume s ≥ and ≤ k ≤ 11 Let us once again begin by genus embedding graph Km into orientable surface Sγ(s,k) when k = 2, and...
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Báo cáo y học: "Computational identification of obligatorily autocatalytic replicators embedded in metabolic networks" docx
Ngày tải lên :
14/08/2014, 08:20
... diverse information sources and contain accurate information on reaction reversibility, cofactor usage and also include transport processes and reactions without assigned open reading frames [14] In ... this issue for Synechocystis in favor of sugar metabolism being truly autocatalytic in the autotrophic mode In a similar vein, it will be interesting to examine in the future the autocatalytic ... condition where only glucose and inorganic compounds were included in the food set (that is, a minimal medium) We found that in addition to ATP, NAD+, CoA and quinones also behave as autocatalytic...
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a study on race discrimination embedded in the short story christina rosenthal by jeffrey archer) from a critical discourse analysis = nghiên cứu sự phân biệt chủng tộc trong truyện ngắn christina rosenthal
Ngày tải lên :
02/03/2015, 14:22
... Benjamin and Christina’s father Only one conversation between Benjamin and Christina‟s father had been seen, however, a lot of things need to be investigated in it When Christina and Benjamin found ... Benjamin: Bold - Christina: Bold and Italic - The rabbi: Italic - Mr von Braumer: regular and underlined - Mrs von Braumer: Italic and underlined - Benjamin and Christina: Bold and Underlined ... with studying and analyzing written and spoken texts to reveal the discursive sources of power, dominance, inequality and bias It examines how these discursive sources are maintained and reproduced...
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ART EMBEDDED IN ART
Ngày tải lên :
13/06/2015, 08:00
... GIOCONDA CRISTÓBAL COLÓN PORTARETRATO JANE FONDA MARLENA LUPE IMAGINA METAMORFOSIS POR AMOR AMISTAD DE DON QUIJOTE VISIONES DEL QUIJOTE Obras de Octavio Ocampo Pintor Celayense nacido el 28 de febrero...
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Improvement of nutrient removal and phosphorus recovery in the anaerobic/oxic/anoxic process combined with sludge ozonation and phosphorus adsorption
Ngày tải lên :
05/09/2013, 09:38
... K and Hirata, A (2006) Simultaneous nitrogen and phosphorus removal using denitrifying phosphate-accumulating organisms in a sequencing batch reactor, Biochem Eng J., 27(3), 191-196 Yasui, H and ... using DNPAOs In the present study, phosphorus was - 140 - Journal of Water and Environment Technology, Vol 7, No 2, 2009 removed both in the oxic and anoxic tanks, suggesting that both PAOs and ... energy balance and life cycle assessment analyses will be necessary in a future study CONCLUSIONS In order to meet the increasingly stringent requirements for environmental protection and phosphorus...
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