photoisomerizatiqn in organic thin films

... concerns thin oxide films, which can exhibit some specific metastable structures The final structure of WO3 observed in thin films annealed in air at 450 8C is the monoclinic structure, with WO3yx in ... annealing temperature, the results are identical for a cumulative step-by-step annealing and after continuous annealing Results During annealing, the grain size and structure of thin oxide films ... substrates maintained at 300 8C during deposition For TEM observations, the WO3 thin films can be detached from their substrate in hydrofluoric acid After deposition, the thin tungsten oxide films were...

Ngày tải lên: 20/03/2014, 13:05

... optically sensitive chromophores containing polymeric films (photoreactive organic thin films, POTF) has exploded during the past decade, and it is continuing to be a very active area of science ... AND ORGANIC NONLINEAR I OPTICS Photoisomerization Effects in Organic Nonlinear Optics: Photo-Assisted Poling and Depoling and Polarizability Switching ZOUHEIR SEKKAT 8.1 8.2 8.3 8.4 8.5 Introduction ... determining how many kinetically independent reactions (s) occur in the reaction system (the three elementary reactions in Scheme I are not independent) » s = 1: In a series of spectra taken during...

Ngày tải lên: 18/04/2014, 11:01

... thin films was discussed in detail In Chapter 5, stress-induced anisotropy has CHAPTER INTRODUCTION been studied in pure and SiO2 doped cobalt ferrite thin films The properties of these two films ... anisotropy In part I, magnetocrystalline anisotropy was studied in Al-doped barium ferrite, both in powders and in thin films Other kinds of anisotorpies, i.e shape anisotropy and stress-induced ... anisotropy was finally exhibited in thick films (∼500 nm) v SUMMARY Both SiO2 doped and pure cobalt ferrite thin films were synthesized using a sputtering method in order to study the stress-induced...

Ngày tải lên: 10/11/2015, 11:33

Ngày tải lên: 14/03/2014, 13:20

... Various solution printing techniques have been developed such as ink-jet printing, nozzle printing, screen printing, gravure printing, and so on Thinfilm transfer process, organic vapor deposition, ... deposition of polymer thin films for organic light-emitting diodes Wontae Hwang1, Guoqing Xin1, Minjun Cho1, Sung Min Cho1, and Heeyeop Chae*2 School of Chemical Engineering, Sungkyunkwan University ... 72:519-521 Inkjet printing of doped polymers for organic light emitting devices Pardo DA, Jabbour GE, Peyghambarian N: Application of screen printing in the fabrication of organic light-emitting devices...

Ngày tải lên: 20/06/2014, 23:20

... scanning rate of 1°min-1 Surface morphology of the as-deposited thin films was characterized using a Hitachi S-4100 field emission scanning electron microscope (FESEM) Weights of the MnO2 thin films ... for the MnO2 thin films with different nanostructures A depressed semicircle in the high-frequency range corresponding to the charge-transfer resistance, and a straight sloping line in the low-frequency ... number for the MnO2 thin film synthesized at RT increased to 80 °C, a film composed of nanoflakes can be prepared in a very short time The CV measurements indicate that MnO2 thin films prepared by...

Ngày tải lên: 21/06/2014, 20:20

Ngày tải lên: 21/07/2014, 16:21

... doping, including interactions with induced charges at the dielectric discontinuity, requires investigation Fundamentally, quantum confinement pushes up the allowed energies resulting in an increase ... windows' is to control the flow of light and heat passing the building glazing and the glazing of vehicles In future, the electrochromic windows will be massively applied for energy saving in ... Qualitatively, quantum confinement cuts down the motion of electrons, resulting in a reduction in screening Using the Bohr model for shallow dopants, the binding energy is inversely proportional...

Ngày tải lên: 25/03/2015, 11:58

... all the films deposited RBS-Ion Channeling studies showed that the crystallinity of the thin films improved with increasing deposition temperature and increasing oxygen partial pressure Films with ... as a function of Ta incorporation in Ti1-xTaxO2 thin films (blue solid squares) Variation of calculated carrier density as a function of Ta incorporation in Ti1-xTaxO2 thin films with 100% carrier ... metallic in nature, making it a possible replacement to tin doped indium oxide (ITO) Adding to that, the Kondo effect has also been observed in the anatase phase of TiO2, making it more interesting...

Ngày tải lên: 09/09/2015, 18:49

... observed in a variety of systems containing FM/AFM interfaces, such as inhomogeneous materials, 2, 39 particles 1, 2, and FM thin films on AFM single crystals 40, 41 and thin films. 39, 42, 43 In addition ... back the spins in FM layer to original position as shown in Fig 2.2(b), because the ferromagnetic coupling in the FM-AFM interface helps the spins of FM layer to rotate back as shown in Fig 2.2 ... produce neighboring antiparallel spins and there by reduce the number of interfacial uncompensated spins Most investigations of the roughness role on exchange bias in textured thin films seem to...

Ngày tải lên: 10/09/2015, 15:53

... compositions corresponding to peaks in glass-forming ability and amorphous packing efficiency, indicating that the packing efficiency may not play a dominant role in determining the elastic moduli ... capping layer, by measuring the tip deflections of micro-cantilevers The stress is found to increase with decreasing film thickness A thin dielectric capping layer leads to a further increase in ... materials - 62 2.2 The stresses in thin films 64 2.2.1 The origins of stresses in thin films 64 v 2.2.1.1 The mismatch...

Ngày tải lên: 11/09/2015, 09:16

... their films As an introduction, the whole work in this research is explained below with brief motivation while the corresponding results and discussion will be explained in detail in the coming ... literature survey involving the developments in ultra -thin film lubrication is explained in Chapter All 11 Chapter 1: Introduction experimental characterization techniques used in the present thesis ... properties of this thin layer evolve during the sliding process due to changes in the interfacial temperature In the case of elastomeric polymers, the frictional work is done in moving waves of attachment...

Ngày tải lên: 14/09/2015, 12:11

... as-deposited iron thin films, (b) α-Fe2O3 thin films obtained from the as-deposited iron thin films after two hours of calcination in air at 650 oC (c) shows the absence of peaks from crystalline Fe (44.7°), ... activities include the following: Synthesis of α-Fe2O3 thin films The synthesis of α-Fe2O3 thin films by a two-step process comprising the electrodeposition of thin iron films and the calcination ... as-deposited iron thin films, (b) α-Fe2O3 thin films obtained from the as-deposited iron thin films after two hours of calcination in air at 650 oC (c) shows the absence of peaks from crystalline Fe (44.7°),...

Ngày tải lên: 26/09/2015, 10:05

... fabricating thin films of high quality to obtain sufficiently high MR values, resulting in little interests in this feild However, with the advancement in deposition techniques, and its potential in ... coupling[5], as shown in Figure 2.3.1a, resulting in majority of electrons in adjacent layers having opposite spins A spin ‘up’ majority electron in one layer will encounter strong scattering ... ferromagnetic layers sandwiching a thin insulating layer The common ferromagnetic materials used include Ni80Fe20 and Co In this project, the metal Ta was examined to determine its suitability as the...

Ngày tải lên: 10/11/2015, 11:35

... of Thin Films 451 10.1 Introduction to Electrical Properties of Thin Films 451 Conduction in Metal Films 455 Electrical Transport in Insulating Films ... response to this need It is intended for Science and engineering students in advanced undergraduate or first-year graduate level courses on thin films Participants in industrial in- house courses or ... identifying Miller indices are indicated in Fig 1-3 Note that a negative index is indicated above the integer with a minus sign Crystallographic directions shown in Fig 1-3 are determined by...

Ngày tải lên: 05/03/2014, 17:20

... as-prepared CdS thin films 3.4 Photoluminescence spectra Preliminary investigations show that photoluminescence (PL) spectra of the obtained CdS thin films have two distinct bands at ca 465 nm and ca ... 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 ASTM card for CdS [10] 2θ 24.828 26.449 ... characterization is to be investigate for further detailed information in this regard Fig Typical photoluminescence spectrum of the as-prepared CdS thin films Conclusions In this work, we show a...

Ngày tải lên: 14/03/2014, 13:20

... subtilisin in the presence of 98% (w/w) of KCl was tentatively explained by either rigid salt structure protecting the enzyme in organic solvents or polar environment of salt helping in maintaining ... Antibody-antigen binding in organic solvents Biochem Biophys Res Commun 158, 80–85 Stocklein, W., Gebbert, A & Schmid, R.D (1990) Binding of triazine herbicides to antibodies in anhydrous organic solvents ... is in environmental control and analysis [95] Russell et al [96] showed that antigen–antibody interaction is possible in low water containing organic solvents Stocklein et al [97] studied binding...

Ngày tải lên: 16/03/2014, 16:20

... verified by performing experiments with aluminium doped titanium dioxide thin films grown on insulating quartz substrates instead of conducting gold-coated titanium substrates The oxide thin films were ... can increase either with the increase in height or decrease in width of the ridges and in this case ‘h’ increases and ‘w’ decreases, for the samples etched in presence of UV light Since the increase ... ∼100–250 nm The relative increase in the grain size implies a possibility of grain growth during etching in presence of UV light This is attributed to the vigorous etching rate attained upon UV exposure...

Ngày tải lên: 19/03/2014, 16:47

... Lottici, Thin Solid Films 516 (2008) 4128 Please cite this article as: N Naseri, et al., Thin Solid Films (2009), doi:10.1016/j.tsf.2009.08.001 ARTICLE IN PRESS N Naseri et al / Thin Solid Films ... been explained in other literatures [1,19,33] By examining the various values of η, as a result of line fitting, η=2 was determined for the pure and doped WO3 films describing their indirect allowed ... WO3 thin films were investigated on ITO/glass substrates in a 50 ml glassy cell containing two electrodes The Au–WO3 films, as working electrodes, were electrochemically cycled in a M LiClO4 in...

Ngày tải lên: 20/03/2014, 13:04