optical properties of zno and related alloys

... nm and thicknesses of 50 nm In Fig 2(c) and (d), FE-SEM images of the submicrorods ZnO is shown The diameters of ZnO rods are about 100 nm and their lenghts are up to ␮m The FE-SEM images of ... 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 was ... is due to 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...

Ngày tải lên: 06/05/2014, 13:23

... impurities and is helpful in understanding the optical and electrical performances of the materials We focused on the temperature-dependent PL measurements of various silver-doped ZnO (SZO) NWs ... 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 ... Page of (c) EDS (b) (103) ZnO NW nm Figure TEM images of 3SZO NW (a) The location and the size of the Au catalyst, the present of Au catalyst, is demonstrated the VLS method (b) The HR-TEM and...

Ngày tải lên: 20/06/2014, 22:20

... 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

... physical properties of ZnO nanostructures [19] The irradiation changes the amount of defects in ZnO nanorods resulting in changes in the optical properties of ZnO The effect of the ion irradiation of ... Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light-emitting diodes N H Alvi*1, S Hussain1, J Jensen2, O Nur1, and M Willander1 Department of Science and Technology ... influence the optical and electrical properties of heterojunctions The p-GaN as a substrate is a good candidate that has small lattice mismatch with ZnO There is only few growth reports of n -ZnO nanorods...

Ngày tải lên: 18/06/2014, 22:20

... physical properties of ZnO nanostructures [19] The irradiation changes the amount of defects in ZnO nanorods resulting in changes in the optical properties of ZnO The effect of the ion irradiation of ... Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light-emitting diodes N H Alvi*1, S Hussain1, J Jensen2, O Nur1, and M Willander1 Department of Science and Technology ... influence the optical and electrical properties of heterojunctions The p-GaN as a substrate is a good candidate that has small lattice mismatch with ZnO There is only few growth reports of n -ZnO nanorods...

Ngày tải lên: 20/06/2014, 04:20

... attack is of interest 15.3 Record the number of attacked sites on each side of the specimen (Methods D and F), the maximum depth of attack (Methods D and F), and the average depth of attack (Method ... Results for ASTM G48 Standard Test Method for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of the Ferric Chloride Solution - Methods E and F,9 February 1, ... different laboratories 16.1.1 The precision of Methods A and B for measuring the pitting and crevice corrosion resistance of stainless steels and related alloys using a ferric chloride solution is...

Ngày tải lên: 13/01/2016, 17:51

... 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 360 ... and SAED pattern of the sea urchin-like ZnO nanostructures are presented in Fig Fig 2a and b displays the low magnification and high magnification SEM images of the sea urchin-like ZnO nanostructures, ... 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...

Ngày tải lên: 06/05/2014, 13:23

... 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 ... Japan), and the optical properties were observed in a UV-vis spectrometer (S-3100, Scinco, Gangnam-gu, Seoul, South Korea) Results and discussion Figure shows cross-sectional FE-SEM images of the ZnO...

Ngày tải lên: 21/06/2014, 17:20

... both in shape and in dimension to the fibrils of hTTR and sbTTR formed by heating The thick and straight morphology of heat-induced fibrils of hTTR, sbTTR and ecTRP is similar to that of amyloid fibrils ... Stability and fibril formation of TTR and TRP Fig DSC profiles of hTTR, sbTTR, and ecTRP The melting temperatures (Tm) were 97.8 °C for hTTR, 93.0 °C for sbTTR, and 66.7 °C for ecTRP Fig Analysis of tetramer ... that of TTRs and TRPs (Fig 1) In the current study, the fibril-forming and amyloidforming properties of three representatives from the TTR and TRP families were investigated Amyloidogenic properties...

Ngày tải lên: 16/03/2014, 01:20

... 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

... images of the ZnO nanorods; (c) low- and (d) high-magnification FESEM images of the ZnO submicrorods and (e) low- and (f) high-magnification FESEM images of the ZnO microrods detailed morphology of ... characterization and optical properties of star-like ZnO nanostructures, Mater Lett 64 (2010) 898–900 [28] Y.H Ni, X.W Wei, J.M Hong, Y Ye, Hydrothermal preparation and optical properties of ZnO nanorods, ... diameters of about 200 nm and lenghts of lm Fig 2e and f shows the SEM images of the ZnO microrods The lower magnification image (2e) indicates that ZnO microrods highly disperse have diameters of about...

Ngày tải lên: 06/05/2014, 13:22

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

... 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 ... designed and carried out the experiments and wrote the first draft of the manuscript JHA analyzed the properties and helped draft the manuscript KNH and KSH detailed the original idea and modified ... temperature [6] Figure shows the plot of (ahν)2 versus hν, where a is the optical absorption coefficient, and hν is the energy of the incident photon The optical band gap (Eg) is calculated from the...

Ngày tải lên: 20/06/2014, 21:20

... 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