electro optical properties of wo3 based electrochromic device studied in situ by optics multi canal analyzer
DSpace at VNU: Optical Properties of Zn-based Semiconductor Nanoparticles and Application in Two-barcode Encryption
... Photoluminescences of the ZnO:ZnS/Mn pellets of different mass ratios (A) and the graph of relative PL intensity (B – square points), intergral intensity ratio (B – circle points) of peaks at 515 of ... dependence of relative intensity of peak at 515 nm to 600 nm on the mass ratio (Fig 5B) Decreasing of the proportion of ZnS/Mn results in the decreasing of the relative intensity of the peak ... to PL peak of ZnS/Mn The change of the relative intensity of the peak 600 nm is evaluated by two methods On one hand, the ratio of the absolute PL intensity of peak at 515 nm to that of peak at...
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Báo cáo hóa học: " Design of zone-based bandwidth management scheme in IEEE 802.16 multi-hop relay networks" doc
... time of BS bandwidth allocation Intra-zone handoff and inter-zone handoff Moreover, by introduction the idea of zone, two types of handoff between RSs are defined, intra-zone handoff and inter-zone ... To integrate IP layer scheduling (L3) and IEEE 802.16 scheduling (L2), Chen et al [14,15] proposed the idea of multilayer QoS scheduling support by assigning different scheduling algorithms in ... Alanen, J Karhula, T Hamalainen, Ensuring the QoS requirements in 802.16 scheduling in Proceedings of 9th ACM International Symposium on Modeling Analysis and Simulation of Wireless and Mobile Systems...
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Influences of titanium oxide additions on the electrochromic properties of WO3 thin films
... of electrochromic technology with a film of WO3 immersed in an ion-containing electrolyte.[17] In 1975, Faughnan et al of the RCA Laboratories in Princetonreported WO3 undergoing reversible electrochromic ... following electrochemical reduction of solid tungsten trioxide.[7] By 1942 Talmay had a patent for electrochromic printing called electrolytic writing paper involving MoO2 and/ or WO3. [8-9] In 1951, ... wavelength of 800nm of 64cm2/C, compared to 73% and 19cm2/C for the pure WO3 thin film Based on these improvements on electrochromic properties by doping TiO2 into WO3 thin films in chapter 4,...
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Effects of simultaneous doping with boron and phosphorous on the structural, electronic and optical properties of silicon nanostructures
... absorption peak Multidoping In this section, we will study how the FE and the electronic properties of the Si-nc are in uenced by the insertion of more and more impurities We call this insertion of several ... in uence of the electronic and transport properties from doping [52,53] In particular, due to the application in electronic devices, the main efforts have been devoted to the study of B and P singledoped ... P codoping in Si-nw, concentrating not only on the structural properties but also on how doping in uences the electronic and optical properties Here, we aim to resume the main outcome of this...
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Tripathy, optical properties of nano silicon
... Raman spectra of (a) nanocrystalline Si prepared by pulsed plasma processing and (b) porous silicon prepared by anodic etching using 488 nm line of Ar+ laser Optical properties of nano-silicon ... decreasing the thickness of the a-Si : H layer This results in termination of dangling bonds of the surface Si atoms of nanocrystalline silicon Nanocrystalline silicon thus fabricated is embedded in ... of the dot under linear mapping d = Na (Å) only to get a proper scaling of our data points We find the gap energy increases as the size of the dot decreases, which confirms the stronger confinement...
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First principles optical properties of silicon and germanium nanowires
... in simple EMA models Optical properties of SiNWs and GeNWs In Section of the present paper, we aim to point out the importance of the many-body effects on the optical response of some of the studied ... character of the conduction band minima (CBM) in the two cases These CBM are obtained through the folding of the bulk energy bands on the wires axis; whereas in Si the CBM retain mainly the original indirect ... explained in terms of the different geometrical structure of wires grown with different orientation Finally the comparison of the optical spectra of SiNWs and GeNWs with diameters of the order of...
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Electronic structure and magneto optical properties of solids v antonov, b harmon, a yaresko
... DFT is based on the Hohenberg and Kohn theorem [43] whereby all properties of the ground state of an interacting electron gas may be described by introducing certain functionals of the electron ... occupied d bands in the later case Also of interest is how the spin-orbit interaction of the nonmagnetic metal (increasing along the series of Cu, Pd, Pt, and Au) in uences the MO response of the MLS ... TLFeBOOK 30 ELECTRONIC STRUCTURE AND MO PROPERTIES OF SOLIDS This formula can be written in a more instructive form By expanding εi (λ) into a series in λ and allowing for the dependence of these...
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electrical and gas - sensing properties of wo3 semiconductor material
... on an alumina tube with Au electrodes and Platinum wires The SiO2 was used to add intensity of sensitive material of WO3 , but it did not in uence the gas-sensing properties of WO3 -based sensor ... reducing gas acting on the WO3 sensor surface can be explained as [18]: R OÀ RO eÀ ads To maintain neutrality, the electrons release back WO3 material, resulting in the increase of the electron ... sensor in air at operating temperature (a) 200°C and (b) 250°C In this study, we ®rst examined the eect of calcining temperature on gas-sensing properties of sensor It was found that the calcining...
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ethanol and ozone sensing characteristics of wo3 based sensors activated by au and pd
... and the electrons capture by oxygen through the interface Au /WO3 In this case the conductance is mainly controlled by the grains boundaries phenomena, i.e by the electron transfer step in these ... Electrical and optical properties of WO3 thin films, Thin Solid Films 397 (2001) 238–243 [8] W Yu-De, C Zhan-Xian, L Yan-Feng, Z Zhen-Lai, W Xing-Hui, Electrical and gas-sensing properties of WO3 semiconductor ... Physics at the Engineering Institute of Tunis (INSAT) in 2000 He was awarded his Doctorat d’Etat in semiconductors from University of Tunis (Tunisia) in 1994 He is head of research group in Semiconductor...
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gas sensing properties of wo3 doped rutile tio2 thick film at high operating temperature
... treatment, the grain sizes of the fabricated sensing films increased But, WO3 doping disturbed the grain growth of the sensing films That is, the WO3 doping clearly affected the grain growth of the TiO2 ... electrical properties of the sensing film The WO3 may occupy the interstitial sites in TiO2 lattice according to the following: TiO2 WO3 ! W 00 ỵ V 00 ỵ Ox O Ti O 4ị Since the predominant defect ... increasing amount of doped WO3 The grain sizes of the sensing films were calculated by the Scherrer equation (1) t ¼ 0:9 k=B cos hB : Fig The results of NO2 (500 ppm) detection at 600 °C ð1Þ In...
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influence of binders on the sensing and electrical characteristics of wo3-based gas sensors
... example, the grain size of WO film decreases as the amount of SiO binder is increased w3x Thus the addition of a suitable amount of SiO in WO sol–gel is believed to increase the porosity of the composite ... of the resistance in NO x gas to that in normal air, S is given by Ss R gas R air s exp qDVi ž / kT Ž Thus, the influence of binders on the sensitivity of the WO gas sensors can be studied by ... influence of Debye length on the binder-dependent sensing characteristics should be marginal One may imagine that the grain size affects some sensing characteristics of our samples since the NO...
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study of wo3-based sensing materials for nh3 and no detection
... and responding properties of WO decayed with loading of alkali metals The responding and recovery properties were obviously improved by loading with alkali earth metals The materials of WO loaded ... the surface of the WO 3 -based sensing element Two kinds of NO reduction catalysts of TiO q 10 wt.% CuO q wt.% SiO and TiO q wt.% V2 O5 q wt.% WO q wt.% SiO were used for the coating layers, and ... obtained The designed NH –NO equivalent point sensor includes two parts: one is a sensing material and the other is a catalyst This research gives a number of good candidates in semiconducting...
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synthesis and optical properties of colloidal tungsten oxide nanorods
... COMMUNICATIONS Comparing the intensities of the (010) and (014) peaks of the sample with those of the bulk W18O49, it was found that the relative intensity of (010) has been dramatically increased (from ... nm in length (aspect ratio ≈ 10) were obtained at the reaction temperature of 250 °C (Figure 3a).19 Longer nanorods of 130 ( 30 nm in length (aspect ratio ≈ 20) were prepared at 270 °C by using ... and the intensity of this peak increases relative to that of UV emission as the length of nanorods increases A similar PL pattern with two emission maxima, yet at much lower energies of 2.8 and...
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Báo cáo khoa học: "Computational properties of environment-based disambiguation" docx
... adjoining grammar for english Technical report, University of Pennsylvania S Billot and B Lang 1989 The structure of shared forests in ambiguous parsing In Proceedings of the 27 Annual Meeting of ... within the comfor a contextplexity of parsing (i.e within free grammar, where is the number of words in the input sentence), without sacrificing logical correctness, in order to make environmentbased ... linear in space and time on the number of elements in each of the composed sets (assuming the sets are sorted in advance and remain so), the calculation of referent sets only adds a factor of...
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optical properties of solids
... most important processes (intraband and interband) involved in studies of electronic properties of solids If we think of the optical properties for various classes of materials, it is clear from ... consist of a spatial and a spin part The effect of the spin-orbit interaction is to introduce a partial lifting of the degeneracy of band states at high symmetry points in the Brillouin zone Also, ... bands of Ge: (a) without and (b) with spin–orbit interaction The listing above gives the Γ point splittings The spin-orbit splittings are k-dependent and at the L-point are typically about 2/3 of...
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optical properties of epitaxial bifeo3thin film
... functions of optical constants and layer or film thickness, were fitted to the corresponding optical model depicted in the inset of Figure By varying the parameters of the models in the fitting procedure, ... Shanghai Engineering Research Center of Ultra-Precision Optical Manufacturing, Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China 2State Key Laboratory of ASIC ... Principles of optics In Spectroscopic Ellipsometry: Principles and Applications Chichester: Wiley; 2007:13–48 28 Basu PK: Interband and impurity absorptions In Theory of Optical Processes in...
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evaluation of shape and size effects on optical properties of zno pigment
... affects the scattering properties of ice particles [33] The higher surface roughness of nanoparticle-decorated ZnO led to multiple scattering and increasing of the reflectance Presence of nanoparticles ... role in light scattering efficiency [15,22,23] Wave theories of light account for bending phenomena which give rise to scattering Light scattering by this mechanism increases with decreasing particle ... decreases, reflectance increases as the number of first-surface reflections and the amount of multiple scattering increases Further decreases in particle size result in an improvement of the reflectance...
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fabrication and optical properties of ordered sea urchin-like zno
... pattern in Fig 2e further depicts that the sample is single crystalline, which is in agreement with analysis results of Fig 2d For analyzing the photoelectric properties of the sea urchin-like ... sea urchin-like ZnO nanostructures efficiency is ascribable to the contributions from electron through the enrichment of dye loading without sacrificing electron-transport properties [18,19] In addition, ... nanostructures, respectively The intact morphology of an individual sea urchinlike ZnO nanostructure is observed in Fig 2b It is clear that the ZnO crystals are assembled by a central nucleus and many...
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