double layers optical properties and electrochemistry

... ZnS has a wider band gap (Eg = 3.7 eV) than CdS The surface modification of a wide band gap semiconducting shell around a narrow band gap core can alter the charge, functionality, and reactivity ... functional groups, or additional covalent and/ or noncovalent interconnectivity for the growth of ZnS onto CdS nanowires in our experiments The optical properties and photocatalytic activities of the ... mono˚ chromator and Cu Ka radiation (k = 1.5418 A) in the range of 15–80° at room temperature while the tube voltage and electric current were held at 40 kV and 20 mA The morphology and microstructure...

Ngày tải lên: 22/06/2014, 01:20

... Sheldrick GM SHELXS97 and SHELXS-97 Göttingen: University of Göttingen; 1997 [21] Zhou HP, Li DM, Zhang JZ, Zhu YM, Wu JY, Hu ZJ, et al Crystal structures, optical properties and theoretical calculation ... Xue Xuan, Wang Jia Feng, Dong Yi, Jia Yong Synthesis, optical properties and biological imaging of the rare earth complexes with curcumin and pyridine J Mater Chem 2012;22:22774e80 [25] Demas ... bond lengths of C5eC7 (1.47.1(4)) and C8eC9 (1.455(7)) are longer than that of C7e C8 (1.320(4)) and O3eC9 (1.304(4)), or the bond lengths of C14e C13 (1.457(4)) and C12eC11 (1.449(4)) are longer...

Ngày tải lên: 01/07/2014, 13:22

... their optical properties A general introduction of the fine-tuning of optical properties and functionalization of upconversion nanocrystals is presented in the next section Chapter 1.5 Optical properties ... excess potassium and free manganese ions, and redispersed in mL of deionized water 2.2.6 Cell Culture and Labeling HepG2 and HeLa cell lines were maintained at 37oC in 5% CO2 in RPMI and DMEM media ... sensors to biological imaging and drug delivery The aim of this thesis was to further investigate on synthetic approaches, structural features, optical properties and their relationship to the...

Ngày tải lên: 10/09/2015, 09:04

... graphene on mirror before and after laser irradiation (A-C) Raman images of D band, G band and 2D band before strong laser irradiation (D-F) Raman images of D band, G band and 2D band after strong laser ... materials, and it has already been demonstrated to show very interesting optical properties Therefore, we studied the optical properties of graphene As graphene shows rich nonlinear optical properties ... band gap, sub band gap and band edge excitation, the defect states (with their carrier relaxation lifetimes) within the band gap of SrTiO3 have been studied From a previous photoluminescence and...

Ngày tải lên: 10/09/2015, 09:30

... 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 ... concentrating not only on the structural properties but also on how doping influences the electronic and optical properties Here, we aim to resume the main outcome of this work and illustrate specific results ... different sites labelled 1, and The lines are guide for the eye The structural, electronic and optical properties of Si nanostructures doped with different numbers of B and P impurities have been...

Ngày tải lên: 16/03/2014, 15:15

... [41] Optical gaps in SiNWs and GeNWs: quantum confinement and anisotropy effects In this section, we will describe the electronic properties of hydrogen passivated, free standing silicon and germanium ... more extended description about the Green’s function theory for the calculation of band structures and optical properties is given in the paper by Del Sole et al., in this volume In short, through ... gap in SiNWs (left) and GeNWs (right) as a function of wires’ size and orientation Table DFT-LDA electronic gaps in SiNWs and GeNWs are reported, respectively, in the third and fourth column,...

Ngày tải lên: 16/03/2014, 15:33

... 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 ... multilayers 2.2.3 Magneto -optical properties of Co/Cu multilayers 2.2.4 Magneto -optical anisotropy in Fen /Aun superlattices 75 99 121 127 135 138 141 158 159 178 193 203 MAGNETO -OPTICAL PROPERTIES ... ELECTRONIC STRUCTURE AND MAGNETO -OPTICAL PROPERTIES OF SOLIDS TLFeBOOK This page intentionally left blank TLFeBOOK Electronic Structure and Magneto -Optical Properties of Solids by Victor...

Ngày tải lên: 17/03/2014, 14:51

... clearly indicates that these nanowires are of uniform size and smooth surface, and the average diameter and length of these nanowires are 80 nm and ␮m, respectively The energy dispersive X-ray spectroscopy ... single crystalline and grows along [12-1] direction, which is different from common [1 1] and [1 0] growth direction [26,27] No obvious defects and dislocations are observed, and the interplanar ... decomposed into Sn and SnO vapor Sn and SnO vapor subsequently are transported to low temperature zone and form liquid droplets The liquid droplets gradually absorb oxygen and are further oxidized...

Ngày tải lên: 19/03/2014, 16:48

... localized states in the 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 ... 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 ... 20 nm (medium), and 130 ( 30 nm (long) The strongest PL emission peaks appear at 3.60 eV (344 nm), 3.56 eV (348 nm), 3.55 eV (349 nm) for short (25 ( nm), medium (75 ( 20 nm), and long (130 (...

Ngày tải lên: 20/03/2014, 13:08

Ngày tải lên: 22/03/2014, 11:20

... higher and more uniform than scale-like ZnO The scattering of light by small particles is determined not only by the composition of the incident light and the optical properties of the particles and ... synthesis and optical property of scale-like and spindle-like ZnO, Ceramics International 39 (2013) 813–818 [20] J.E Van Nostrand, R Cortez, Z.P Rice, N.C Cady, M Bergkvist, Local transport properties, ... hydrothermal method Evaluation of their optical properties indicated that the spectral reflectance was strongly affected by particle shape and size Nanorod and microrod ZnO pigments had shown the...

Ngày tải lên: 06/05/2014, 13:23

... SEM images, TEM image, HRTEM image 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 ... are assembled by a central nucleus and many needlelike ZnO which grow radially from the nucleus The TEM image in Fig X-ray diffraction pattern (a) and UV–visible optical absorption characteristics ... X-ray diffraction system (SIEMENS D5000) UV–visible optical absorption was measured by UV–visible spectrophotometer (Beijing,TU-1901) Results and discussion Fig 1a shows the XRD pattern of the...

Ngày tải lên: 06/05/2014, 13:23

Ngày tải lên: 13/05/2014, 09:07

... been paid to the synthesis and characterization of bimetallic nanoparticles due to their unique catalytic, electronic, optical, structural and thermal properties [1-5] and subsequent technological ... [37] Optical and structural properties of the samples were studied using optical absorption spectroscopy in the UV-Vis range, transmission electron microscopy (TEM), high resolution TEM (HREM), and ... shape of those nanoparticles, optical absorption spectra give a quick and gross idea on their shapes and sizes In this study we used TEM, HREM and HAADF, along with optical absorption spectroscopy...

Ngày tải lên: 04/06/2014, 15:20

... structural and optical properties of type-II GaSb/InGaAs quantum dots [QDs] grown on InP (100) substrate by molecular beam epitaxy Rectangular-shaped GaSb QDs were well developed and no nanodash-like ... 17] The reason is that they offer comparatively large bandgap energies and provide a possibility of covering the whole middle and far-infared optical range for photoelectric devices Among these ... the quantum-dot infrared detectors [QDIP] and quantum-dot field-effect transistors [QD-FET] In this work, we investigated the structural and optical properties of type-II GaSb/InGaAs QDs grown...

Ngày tải lên: 20/06/2014, 20:20

... value The optical band gap of the film deposited at 100°C was 3.45 eV As the growth temperature increased from 200°C to 350°C, the optical band gap red-shifted from 3.57 to 3.79 eV The band gaps ... manuscript JHA analyzed the properties and helped draft the manuscript KNH and KSH detailed the original idea and modified the first draft of manuscript YGS finalized the manuscript and supervised the ... 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...

Ngày tải lên: 20/06/2014, 21:20

... very sensitive tool for the characterization of acceptor/donor impurities and is helpful in understanding the optical and electrical performances of the materials We focused on the temperature-dependent ... were cleaned 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 ... structural and (a) (b) optical properties of the nanostructures were investigated by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), and low temperature...

Ngày tải lên: 20/06/2014, 22:20

... nanoparticles (Co1-xZnxFe2O4; x = 0, 0.5, and 1) and shelling with silica on the magnetic and optical properties of the ferrite nanoparticles for a variety of magneto -optical nanodevice applications From ... important role on the optical properties enhancement The firing temperatures as well as the crystallite size parameters have great effect on the magnetic and the optical properties of core/shell ... gel matrix: optical and magneto -optical properties J Appl Phys 1999, 85(4):2270-2278 16 Hocini A, Boumaza T, Bouchemat M, Royer F, Jamon D, Rousseau JJ: Birefringence in magneto -optical rib waveguides...

Ngày tải lên: 21/06/2014, 01:20

... in a 1-m monochromator and collected by a cooled InGaAs detector using standard lock-in detection technique Results and discussion The optical properties of the as-grown and annealed QDs on CHP ... forming gas The optical properties of as-grown and annealed samples are characterized by macroscopic PL at 20 K The samples are mounted on the cold finger of a closedcycle He cryostat and excited ... 0.13Ga0.87As bandgap of 1.323 eV and agrees well with the electron and hole eigenenergies estimated from self-consistent solutions of coupled Poisson-Schrodinger equation [29] Sample C’s PL exhibits a double, ...

Ngày tải lên: 21/06/2014, 01:20

... M NaCl solution, and 80 mg PAH was added and stirred for 0.5 h Subsequently, the excess PAH was removed by six repeated centrifugation/wash cycles Similarly, the PSS and PAH layers were then ... 500 and 700 cm-1, which is different from Fe3O4 [40, 41] The IR analysis combined with TEM images and XRD pattern can confirm the synthesis of a-Fe2O3–Au and Fe3O4–Au hybrid nanorods Fe3O4–Au and ... combined magnetic and optical properties, which originate 123 1758 Nanoscale Res Lett (2010) 5:1755–1761 Fig a, b Infrared spectra of FeOOH nanorods (curve a) before layer-by-lay assembly and (curve...

Ngày tải lên: 21/06/2014, 07:20