molecular structure analyses of sio2 thin films

... (111), (200), (220), and (311) planes of cubic CdS [10] Fig Typical X-ray diffractogram of CdS thin films as grown Inset shows XRD pattern of the CdS thin films reported in [9] Table Standard ... VNU Journal of Science, Mathematics - Physics 24 (2008) 119-123 (a) (b) Fig SEM images of CdS thin films prepared in the bath with ml of 1M CdSO4 solution for 9h (a) and with 25 ml of 1M CdSO4 ... spectroscopy The typical Raman spectrum of the as-prepared CdS thin films is displayed in Fig The related researches [6] show that Raman spectra of CdS thin films strongly depends on the film grain...

Ngày tải lên: 14/03/2014, 13:20

... thin films grown by atomic layer deposition for electroluminescent applications Appl Surf Sci 2004, 229:105-111 12 Zhang R, Wang B, Wei L: Influence of RF power on the structure of ZnS thin films ... However, the FWHM value of the film prepared at 400°C increased to 0.154°, indicating the deterioration of the crystallinity of the films The mean crystallite sizes of the films were about 22.3, ... FWHM value of 0.141° has also been observed for these films, indicating that the crystallinity of the films can be improved by increasing the substrate temperatures All of the ZnS films deposited...

Ngày tải lên: 20/06/2014, 21:20

... applicability of the electrospray process to organic thin films in OLEDs was demonstrated in small-scale devices [12] In this work, we demonstrated nanoscale-thick organic thin films using the ... Hachioji, Tokyo, Japan), and a wavelength of 335 nm was used for analysis of PL excitation The thickness and roughness of PVK films were determined by a surface profiler (Alpha-Step, KLA-Tencor Corporation, ... [CF] and 1,2-dichloroethane [DCE] The mixture of CB and DCB was selected as it was optimum for our device structure and process The PL peaks of the thin films were observed at 407 nm with CF and...

Ngày tải lên: 20/06/2014, 23:20

... peaks correspond to the carbon coated copper grid of TEM No peaks of other impurity have been detected Therefore, the EDX profile of sample (inset of Figure 2) indicates that the silver nanoparticles ... http://www.nanoscalereslett.com/content/6/1/434 Page of Figure Resistivity as function of temperature for thin film of silver nanoparticles Inset shows the plot of ln r vs T-1/4 where kB is the Boltzmann ... nanoparticles with a fractal structure embedded in a Teflon AF (R) matrix Appl Phys Lett 2006, 88:13103 17 Wei H, Eilers H: From silver nanoparticles to thin films: Evolution of microstructure and electrical...

Ngày tải lên: 21/06/2014, 02:20

... OF CONTENTS v ABSTRACT vii LIST OF PUBLICATION ix LIST OF FIGURES xi LIST OF SYMBOLS .xiv Chapter-1 Introduction 1 Crystal Structure of ... Electronic Band Structure of TiO2 The electronic band structures of the three polymorphous TiO2-rutile, anatase and brookite are shown in figure 1.2 The DFT-GGA band structure of rutile indicates ... characterization technique of thin films of Ti1-xTaxO2 PLD technique has been used for the film fabrication X-ray diffraction (XRD) studies have been carried out on the epitaxially grown thin films on STO...

Ngày tải lên: 08/09/2015, 15:20

... spectra of the top surface of the Co-Si/C sample (take off angle of 5°) 159 Figure 10-4 XPS Co2p/3 spectrum of the Co/Si mixed layer (interface of Co film and Si/C layer) at take off ... ions of 350 eV prior to deposition of a 10 nm ta-C overcoat The effect of this surface treatment on the structure of the ta-C/AlTiC interface, chemical state of the overcoat and wear resistance of ... Figure 4-10 Structure of the head positioning stage and head mount assembly 60 Figure 4-11 Head mount assembly and structure of the load cell 61 Figure 5-1 Depth profiles of ions in substrate...

Ngày tải lên: 09/09/2015, 10:17

... doped WO3 thin films show two layer structures consisting of nanopillars on top of a compact layer with uniform Ti/W atomic ratio of 4:1 In the present work, on the one hand, this thin film presents ... structural, electrochemical and electrochromic properties of the thin films Furthermore, in this chapter, the pure thin film and the titanium doped thin films are anodized in aqueous acidic solutions, ... WO3 thin films for their first cycle in CV test Table 4.3 List of optical and kinetic parameters for pure WO3 and TiO2 doped WO3 thin films obtained from Figure 4.13 and 4.14 at wavelengths of...

Ngày tải lên: 09/09/2015, 11:16

... thin films and heterostructures BTS thin films have been successfully deposited on LaNiO3 (LNO) /SiO2/ Si substrates by PLD The role of oxygen pressure and the effect of thickness on the microstructure, ... properties of the B-site doped BaTiO3, i.e., Ba(Ti1-xSnx)O3 (BTS) thin films The effects of stress and microstructure on the tunable properties of BTS thin films have been studied, where the films ... design of a BTS/BZN heterostructure to improve the tunable and pyroelectric properties of BTS thin films The performance of the heterostructure is discussed in terms of the thickness effect of the...

Ngày tải lên: 10/09/2015, 15:48

... and coefficients of thermal expansion of amorphous Cu-Zr thin films - 162 7.1 Measurement of Young’s modulus of amorphous Cu-Zr thin films - 162 7.1.1 Analytical model ... review of the basic concepts and analyses of the mechanical properties of materials, as well as the elements of beam mechanics used in this project Chapter describes the fabrication xiv processes of ... analysis, respectively, of the density changes in Cu-Zr and Zr-Cu-Al systems The measurement of Young’s moduli and coefficients of thermal expansion of amorphous Cu-Zr thin films will be covered...

Ngày tải lên: 11/09/2015, 09:16

... adjustment of chains is also worthy of consideration 1.5 Why thin films? Besides the property-oriented molecular tailoring, the introduction of the asymmetric membranes, which typically consist of a thin ... profile of 6FDA- Durene polyimide dense films with different thickness, thus to correlate the aging of hollow fiber containing a thin and dense selective layer with the aging of dense films of ... correlate the aging of hollow fiber containing a thin and dense selective layer with the aging of dense films of comparable thickness; (ii) the CO2 plasticization behaviors of 6FDA-Durene films with different...

Ngày tải lên: 26/09/2015, 10:13

... properties of FePt-Ag thin films, the first step is to fabricate the materials Characterization of the thin films provided information about structural and magnetic information of FePt-Ag thin films ... components for the FePt-Ag thin films on MgO substrate 76 Figure 5-1 Structure illustration of the FePt/Ag/FePt thin films 82 Figure 5-2 XRD scans of FePt films with various inserted ... illustration of cosputtered FePt-Ag thin films 43 viii List of Figures Figure 3-8 XRD scans of (FePt)1-x-Agx films on CrRu underlayer 44 Figure 3-9 FePt grain size as a function of Ag content...

Ngày tải lên: 30/09/2015, 06:41

... and oxygen pressure on crystal structure of MgO films 38 3.3.2 The effect of etching condition of the Si substrates on microstructure of differently oriented MgO films 42 3.3.3 The relationship ... Results and discussion 59 iv 4.3.1 The effect of temperature on Crystal Structure of CoFe2O4 films 59 4.3.2 HRTEM study on the microstructure of our CoFe2O4/MgO/Si multilayer system 60 4.3.3 Magnetic ... orientations of MgO films 47 3.3.4 The influence of target-substrate distance on film quality 50 3.4 Conclusions 52 3.5 References 54 High perpendicular coercive field of (100)-oriented CoFe2O4 thin films...

Ngày tải lên: 07/10/2015, 10:10

... termination case of BaTiO3 films, the asymmetry of barium sites plays the prime role STUDY ON LATTICE AND ELECTRONIC STRUCTURES AT THE SURFACE OF 215 Table The location and DOS peak structure of energy ... electronic structures of thin films It is well evidenced that due to the break of the TiO6 octahedral coordination into TiO5 pyramidal one at the surface the lattice and the electronic structures of ... contraction of both center and surface unit cells of studied films seems to in contrary with the experimental observation on the anomalous lattice expansion of nanocrystalline BaTiO3 particles of S...

Ngày tải lên: 30/10/2015, 19:59

... in SiO2 content, indicating that the growth of WO3 grains was suppressed by SiO2 Fig Average grain size of WO3 evaluated from XRD as a function of SiO2 content Fig shows AFM images of the thin ... grain size of WO3, the dispersion of SiO2 would also change the microstructure of the film, e.g porosity and pore size distribution which affects the rate of response In this respect, the SiO2 (5%)–WO3 ... NO2 Fig Response transients of SiO2 (5%)–WO3 thin film on turning on and off various concentrations of NO2 diluted in air is primarily determined by the grain size of WO3 in agreement with literature...

Ngày tải lên: 20/03/2014, 13:08

... Rocking curves of the FePt fct (001) peak of FePt thin films with and without Ag intermediate layers Figure 8-4 Plane view TEM images of FePt thin films with (a) Structure I and (b) Structure III ... and coercivity values for FePt thin films with different intermediate layer structures Table 8-I Layer structure of FePt films and coercivity values for FePt thin films grown on corning glass and ... and SiO27 9,80 have also been dopped into FePt films as a insulation matrix to form a granular structure The magnetic properties of granular thin film are different to those of continuous thin films...

Ngày tải lên: 13/09/2015, 21:23

... some of the experiments to produce PZT films with different morphology We focused our research on investigating the microstructure of the PZT thin films and the correlation between the structure ... scans of the thin films The films were first mounted onto a glass slide The xray was produced by impinging a copper target with an electron beam of 30 kV with a current of 20 mA An incident slit of ... method 61 Figure 4.2 Surface SEM images of the PZT thin films deposited by (a) PLD method and (b) sol-gel method; Cross-sectional SEM images of the PZT thin films grown by (c) PLD and (d) sol-gel...

Ngày tải lên: 16/09/2015, 08:31

... eV) of batch E 4.5 The thickness of five batches of thin films 4.6 Measured direct gaps of five batches of films 52 5.1 Some important parameters of three kinds of substrates involved 5.2 PE-MOCVD ... lot of attention recently However, synthesis of pure CuAlO2 thin films is complicated due to the variety of possible copper aluminum oxide (Cu-Al-O) phases [7] Qualities of CuAlO2/Cu-Al-O thin films ... CuAlO2/Cu-Al-O thin films are striving to find the conduction mechanisms of the thin films, while others are trying to find new or improved growth methods to enhance the performance of the thin films, ...

Ngày tải lên: 05/10/2015, 13:53

... does and because of the heteroepitaxial growth of films WO3 in which the parameters of plane ITO (440) are slightly larger than the ones of WO3 planes The relation between shifts of XRD peaks and ... LeGore, R.J Lad, Thin solid films 400 (2001) 56 Huiyao Wang, Pei Xu, Tianmin Wang, Thin solid films 388 (2001) 68 Christian Salinga, Hansjörg Weis, Matthias Wuttig, Thin solid films 414 (2002) ... spectra of WO3 films on layers ITO with different thicknesses Figure is XRD spectra of films on layers ITO with different thicknesses However their peaks distribute in such a small range of the...

Ngày tải lên: 13/02/2014, 03:20

... years Thin Films - A Historical Perspective Thin- film technology is simultaneously one of the oldest arts and one of the newest sciences Involvement with thin films dates to the metal ages of antiquity ... 10 Electrical and Magnetic Properties of Thin Films 451 10.1 Introduction to Electrical Properties of Thin Films 451 Conduction in Metal Films 455 ... and solid-state reactions in thin films Much of this chapter is a condensed adaptation of standard treatments of bulk materials, but it is equally applicable to thin films Nevertheless, many distinctions...

Ngày tải lên: 05/03/2014, 17:20

Ngày tải lên: 14/03/2014, 13:20