optical properties of films and coatings

... 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 ... 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 0.8 nm, ... onset of optical absorption is found only in the case of GeNWs and not in the case of SiNWs With the inclusion of the excitonic effects (bottom panels) we see that an important transfer of the...

Ngày tải lên: 16/03/2014, 15:33

... temperatures on the structural properties of the films has been investigated, and the optical properties of the films have also been analyzed Methods Synthesis ZnS films were deposited onto a Corning ... composition of the films on glass substrates was investigated by energy dispersive analysis of Xray [EDAX] (Horiba 7593-H; Horiba, Ltd., Kyoto, Japan) The optical properties of the films were ... migration of the sputtered atoms, thus forming a denser film with larger grains and lower defects Optical properties The optical transmittance spectra in the wavelength range of 200 to 1,100 nm of ZnS...

Ngày tải lên: 20/06/2014, 21:20

... well-established knowledge of the electrical and optical properties of GaSe thin films, in this paper, we report the results on electrical and optical measurements of amorphous thin films of GaSe nanorods ... frequency doubling and fast optical gating [11] and behaves as an X-ray detector [12] Electronic and optoelectronic properties of GaSe, GaS, and InSe materials indicate the possibilities of realizing ... field of micro/optoelectronics Significant research efforts have been focused to the study of the electrical and optical properties of this compound in thin film formation Since the optimization of...

Ngày tải lên: 21/06/2014, 17:20

... application of identification of compounds, there are a large number of reported works on the characterisation of concentration and mobility of free carriers, strain and crystal quality, determination of ... Ta and Nb Recently discovered water splitting ability of TiO2 has generated a great deal of interest in the field of energy and environment science research because of its unique conduction band ... the lower edge of the O2p-like valence band and extend almost through the whole band Whereas, the uppermost valence band edge consists of pz-type states that form the lone pair (out -of- plane) π...

Ngày tải lên: 08/09/2015, 15:20

... effects of size and shape of Si-nc on the incorporation of group-III (B and Al), group-IV (C and Ge) and group-V (N and P) impurities Single-doping has been investigated both in spherical and faceted-like ... approaching asymptotically the value of the band-gap of the undoped Si-nw This is another indication of how doping can modify the electronic and optical properties of the Si nanostructures Conclusions ... the FE and the electronic properties of the Si-nc are influenced by the insertion of more and more impurities We call this insertion of several impurities multidoping Fig shows how the FE of a large...

Ngày tải lên: 16/03/2014, 15:15

... 2.1.8 Fe3O4 and Mg2+ -, or Al3+ -substituted magnetite Magneto -optical properties of magnetic multilayers 2.2.1 Magneto -optical properties of Co/Pd systems 2.2.2 Magneto -optical properties of Co/Pt ... STRUCTURE AND MAGNETO -OPTICAL PROPERTIES OF SOLIDS TLFeBOOK This page intentionally left blank TLFeBOOK Electronic Structure and Magneto -Optical Properties of Solids by Victor Antonov Institute of Metal ... theoretical investigations of the electronic structure, optical, MO, and XMCD properties of compounds and multilayered structures Chapter of this book is of an introductory character and presents the theoretical...

Ngày tải lên: 17/03/2014, 14:51

... 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 ... band gap due to impurities.22b In light of these assignments, we suggest that the UV emission of nanorod samples in this work might correspond to the band-toband transition The blue emission of ... 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...

Ngày tải lên: 20/03/2014, 13:08

Ngày tải lên: 22/03/2014, 11:20

... diameters of about 200 nm and lengths of ␮m The FE-SEM images of nanorod ZnO pigment are shown in Fig 2(g) and (h) It is found that the product is composed of well-dispersed Fig XRD patterns of the ... a large scale, and all of the nanorods have diameters of about 50 nm and lengths of 300 nm Fig (i–k) exhibits the FESEM images of nanoparticle-decorated ZnO pigment The surface of ZnO pigment ... ZnO band gap and this phenomenon is one of the most important ZnO characteristics [14] The particle sizes of scale-like and submicrorod ZnO pigments are in the optimum range of 0.25–0.45 ␮m, and...

Ngày tải lên: 06/05/2014, 13:23

... pattern (a) and UV–visible optical absorption characteristics (b) of the sea urchin-like ZnO nanostructures Fig SEM images (a,b), TEM image (c), HRTEM image (d) and SAED pattern (e) of the sea ... the difference of cell configurations and the quality of the dye However, in the same condition, the conversion efficiency of sea urchin-like ZnO nanostructures is superior to that of ZnO nanorod ... the well-crystallized particles of prepared ZnO Fig 1b shows the UV–visible optical absorption characteristics of the sea urchin-like ZnO Excitonic absorption peak of the ZnO sample is at about...

Ngày tải lên: 06/05/2014, 13:23

Ngày tải lên: 13/05/2014, 09:07

... Thus the control of structural type and composition of bimetallic nanoparticles comprised of Ag and Au have been a subject of considerable interest; and the developed of simple and versatile methods ... the scattering coefficients an and bn, and are function of particle radius, and light wavelength λ (in terms of the Ricatti-Bessel functions) As the absorption band of noble metal nanoparticles ... frequency and intensity of SPR band depend on the size, shape, structure and composition [39,40,45] of the metal nanoparticles While the techniques like TEM, HREM reveal the exact size and shape of...

Ngày tải lên: 04/06/2014, 15:20

... Anomalous optical magnetic shift of self-assembled GaSb/GaAs quantum dots J Appl Phys 2011, 110:013522 Figure AFM and STEM images of GaSb/In0.53Ga0.47As QDs and histogram of the height of GaSb/In0.53Ga0.47As ... measurements were performed for the optical properties of the sample at 20 K using the source of a 532-nm line, and the excitation power is changed from mW to 30 mW Results and discussion In order to ... diameter, and height size distribution of GaSb/ InGaAs QDs on InP (100) substrate, the AFM and STEM measurements were carried out Figure shows the AFM and STEM images of GaSb/In0.53Ga0.47As QDs and...

Ngày tải lên: 20/06/2014, 20:20

... Realization of p-type ZnO thin films via phosphorus doping and thermal activation of the dopant Appl Phys Lett 2003, 83:63 32 Jie J, Wang G, Chen Y, Han X, Wang Q, Xu B, Hoe JG: Synthesis and optical properties ... in acetone and methanol for 20 and rinsed in de-ionized water for The 1, 3, and wt % SZO (5SZO) NWs are grown in a furnace at 800°C with argon gas of 90 sccm and a working pressure of 1.2 torr ... images of various SZO NWs grown using 1, 3, and wt.% Ag-doped ZnO ceramic targets As shown in Figure 1a, b, the distribution of the SZO NWs is random, with the average diameter of about 60 nm and...

Ngày tải lên: 20/06/2014, 22:20

... objective of this study is to investigate the effect of Zn2+ partially substituting for Co2+ in CoFe2O4 nanoparticles (Co1-xZnxFe2O4; x = 0, 0.5, and 1) and shelling with silica on the magnetic and optical ... optical properties of the ferrite nanoparticles for a variety of magneto -optical nanodevice applications From a synthesis point of view exploring the effect of firing temperatures (400°C, 600°C and ... nanoparticles (zinc ferrite and cobalt zinc ferrite nanoparticles) This is due to the effect of the change of color on the optical properties of the ferrite nanoparticles from black at CoFe2 O4 , to brown...

Ngày tải lên: 21/06/2014, 01:20

... in the middle of a quartz tube and heated to 350°C for between 30 and a few hours under continuous flow of a hydrogen-containing forming gas The optical properties of as-grown and annealed samples ... using standard lock-in detection technique Results and discussion The optical properties of the as-grown and annealed QDs on CHP structure are analyzed against those of the controlled QDs and CHP ... Figure PL spectra of sample D, and changes in integrated intensity and FWHM (a) PL spectra of sample D [QDs on CHP] subject to 350°C ex situ hydrogen annealing for 0, 30, 60, and 120 (offset for clarity)...

Ngày tải lên: 21/06/2014, 01:20

... Page of (a-2) (b-2) (c-2) Figure FE-SEM images of ZnO films with various growth angles ZnO films at (a-1) 0°, (b-1) 15°, and (c-1) 30° growth angles and their enlarged images (a-2, b-2, and c-2) ... thickness of the ZnO thin films was checked by FE-SEM and was fixed at 100 nm Three growth angles (0°, 15°, and 30°) of the columnar ZnO films were carefully selected The intensities of the main ... condition on average and low values The transmittance and reflectance are slightly changed by the growth angle of ZnO films Figure shows the reflectance patterns of the ZnO films with different...

Ngày tải lên: 21/06/2014, 17:20

... GaSb/In0.53Ga0.47As QDs and histogram of the height of GaSb/In0.53Ga0.47As QDs (a) The AFM image of GaSb/In0.53Ga0.47As QDs, (b) histogram of the height of GaSb/In0.53Ga0.47As QDs, and (c) the STEM image of GaSb/In0.53Ga0.47As ... diameter, and height size distribution of GaSb/InGaAs QDs on InP (100) substrate, the AFM and STEM measurements were carried out Figure shows the AFM and STEM images of GaSb/ In0.53Ga0.47 As QDs and ... measurements were performed for the optical properties of the sample at 20 K using the source of a 532-nm line, and the excitation power is changed from mW to 30 mW Results and discussion In order to...

Ngày tải lên: 21/06/2014, 17:20

... GaSb/In0.53Ga0.47As QDs and histogram of the height of GaSb/In0.53Ga0.47As QDs (a) The AFM image of GaSb/In0.53Ga0.47As QDs, (b) histogram of the height of GaSb/In0.53Ga0.47As QDs, and (c) the STEM image of GaSb/In0.53Ga0.47As ... diameter, and height size distribution of GaSb/InGaAs QDs on InP (100) substrate, the AFM and STEM measurements were carried out Figure shows the AFM and STEM images of GaSb/ In0.53Ga0.47 As QDs and ... measurements were performed for the optical properties of the sample at 20 K using the source of a 532-nm line, and the excitation power is changed from mW to 30 mW Results and discussion In order to...

Ngày tải lên: 22/06/2014, 00:20

... composed of stannum and sulfur, and the ratio of the S atom and Sn atom is 1:0.985, which just accords with the stoichiometric ratio of SnS The representative optical absorption spectrum of the ... = and 2/3 for direct allowed and forbidden transitions, respectively, and n = 1/2 and 1/3 for indirect allowed and forbidden transitions, respectively Figure shows curves of (ahm)2 versus hm of ... 361 Fig SEM images of AAO template and SnS nanowire arrays a Typical SEM image of AAO template b and c The top view in a low magnification d SEM image of a typical crosssection and uniformly distributed...

Ngày tải lên: 22/06/2014, 01:20