modelo s a de c v
Cu AND mn EMBEDDED zno NANOCLUSTER ASSEMBLED FILMS AND NANOCOMPOSITES FABRICATION, CHARACTERIZATION AND PROPERTIES
... technique such as nanocluster beam deposition and RF sputtering techniques and material characterization techniques such as XRD, TEM, AGM, XPS, SEM, SQUIDS, Raman spectroscopy, UV-Vis and PL spectroscopy ... semiconductor oxides (DMSOs) which is applicable in spintronic devices has a lot of advantages as compared to traditional charge based electronics devices in terms of power consumption, coherence times ... Inset shows the Cu 2p3/2 XPS spectra of as-deposited and 400 C vacuum-annealed ZnO:Cu nanoclusters assembled films Figure 5.5 Raman spectra of as-deposited and annealed ZnO:Cu nanocluster assembled...
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Cu AND mn EMBEDDED zno NANOCLUSTER ASSEMBLED FILMS AND NANOCOMPOSITES FABRICATION, CHARACTERIZATION AND PROPERTIES
... technique such as nanocluster beam deposition and RF sputtering techniques and material characterization techniques such as XRD, TEM, AGM, XPS, SEM, SQUIDS, Raman spectroscopy, UV-Vis and PL spectroscopy ... semiconductor oxides (DMSOs) which is applicable in spintronic devices has a lot of advantages as compared to traditional charge based electronics devices in terms of power consumption, coherence times ... Inset shows the Cu 2p3/2 XPS spectra of as-deposited and 400 C vacuum-annealed ZnO:Cu nanoclusters assembled films Figure 5.5 Raman spectra of as-deposited and annealed ZnO:Cu nanocluster assembled...
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evaluation of shape and size effects on optical properties of zno pigment
... than 1.5 m), reflectance is relatively low As particle size decreases, reflectance increases as the number of first-surface reflections and the amount of multiple scattering increases Further decreases ... decreases in particle size result in an improvement of the reflectance As particle size decreases such that the size is less than the wavelength, the particle as a whole interacts with a wavelength ... from AFM and optical reflection measurements In addition, angle-resolved reflection measurements gave an account on the decrease in optical scattering after polishing the sample surface In this case,...
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Báo cáo hóa học: " Effects of silver impurity on the structural, electrical, and optical properties of ZnO nanowires" doc
... procedure Compared with chemical vapor deposition methods, physical vapor deposition (PVD) guarantees a cost-effective process as well as easy energy control because of the relatively simple design and ... Au catalyst and Ag dopant by TEM-EDS These combined metals continuously become bigger caused by added Ag dopants These excess Ag dopants are existed as Ag metal cluster in the SZO NW, which acts ... concentration ratio of 36.79 wt.% using TEM-EDS Effect of Ag clusters in 3SZO, 5SZO NWs decreases resistances because of Ag clusters of high electric conductivity, as shown in Figure Also, Ag clusters...
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Báo cáo sinh học: " Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light emitting diodes" pot
... seems that the chromaticity coordinates for non radiated LED are close to Planckian locus (about Mac-Adam ellipse away) and can be called white light according to the US standard ANSI_ANSLG C7 8, ... of oxygen vacancies but after He+ irradiation oxygen vacancies defects increase and irradiated ZnO nanorods have green emission is centered at approximately 2.42 eV and it is very close to energy ... lattice mismatch can easily be released for nanorods when compared to thin films In addition, a general property of NRs-based LEDs is that each nanorod can act as a wave guide, minimizing side scattering...
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báo cáo hóa học:" Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light emitting diodes" pdf
... seems that the chromaticity coordinates for non radiated LED are close to Planckian locus (about Mac-Adam ellipse away) and can be called white light according to the US standard ANSI_ANSLG C7 8, ... of oxygen vacancies but after He+ irradiation oxygen vacancies defects increase and irradiated ZnO nanorods have green emission is centered at approximately 2.42 eV and it is very close to energy ... lattice mismatch can easily be released for nanorods when compared to thin films In addition, a general property of NRs-based LEDs is that each nanorod can act as a wave guide, minimizing side scattering...
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Báo cáo hóa học: " Temperature dependent optical properties of single, hierarchically self-assembled GaAs/AlGaAs quantum dots" potx
... investigated samples were grown on GaAs (001) substrate by a solid-source molecular beam epitaxy system equipped with an AsBr3 etching unit The GaAs QDs are obtained by overgrowing a GaAs surface containing ... plenty of new application relevant research as well as fundamental physics studies The single GaAs QD PL spectra as a function of the temperature taken at % 5.7 Wcm–2 excitation power are shown in ... (01BM459), Deutsche Forschungsgemeinschaft (DFG) (Research group: Positioning of single nanostructures-single quantum devices), and DFG (Quantum Optics in Semiconductor Nanostructures research group)...
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fabrication and optical properties of ordered sea urchin-like zno
... fabricated via a simple hydrothermal process at relatively mild conditions XRD shows the sea urchin-like ZnO crystals as hexagonal wurtzite monocrystals TEM shows that the ZnO crystals were assembled ... 21171027) The authors are also Fig I V characteristics of the sea urchin-like ZnO nanostructures based DSSCs grateful to the aid provided by the Science and Technology Innovative Research Team in Higher ... fabricated via a simple hydrothermal process at relatively mild conditions have potential as a photoelectrode for the DSSCs Conclusions Ordered sea urchin-like zinc oxide (ZnO) nanostructures were...
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Báo cáo hóa học: " Synthesis, magnetic and optical properties of core/shell Co1-xZnxFe2O4/SiO2 nanoparticles" pot
... fundamental studies as well as technological applications Silica formed on the surface of magnetic nanoparticles could screen the magnetic dipolar attraction between magnetic nanoparticles, which ... stability of the magnetic nanoparticles due to the silica shell which provides a chemically inert surface for magnetic nanoparticles in biological systems Therefore, silica-coated magnetic nanoparticles ... zinc ferrite/silica nanoparticles show a ferromagnetic behavior compared with the sample fired at 800 C which shows a paramagnetic behavior Figure Hysteresis loops of ZnFe2O4 nanoparticles uncoated...
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báo cáo hóa học:" Structural and optical properties of a radio frequency magnetron-sputtered ZnO thin film with different growth angles" pdf
... Tokyo, 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 ... Figure Optical properties of ZnO films based on growth angles (a) Transmittance spectra and (b) reflectance spectra wavelength The 15° angled columnar ZnO film has the lowest average reflectance of ... sample substrate was kept at 9.5 cm, and we manually tilted the sample substrate with angle measurement The thickness and Figure A schematic of the RF magnetron sputtering system Page of cross-sectional...
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DEFECT INDUCED NOVEL ELECTRICAL, MAGNETIC AND OPTICAL PROPERTIES OF TIO2 THIN FILMS GROWN BY PULSED LASER DEPOSITION
... Quasi-Particle Transitions in a Class of Polar Oxides: A Raman Spectroscopic Study, Surajit Saha, Bing-Chen Cao, Soumya Sarkar, Chunxiao Cong, Mallikarjuna rao Motapothula, Saurav Prakash, Tarapada ... and polarons in anatase TaxTi1-xO2, (Abhimanyu Rana, Tarapada Sarkar, Surajit Saha, Xu Hai, Kalon Gopinadhan, Amar Srivastava, A Ariando, Loh Kian Ping, T Venkatesan Advanced materials (submitted)) ... hydrogen, additive to pigments, sensor devices and novel solar cells They are also used in other electronic devices such as varistors and may even find usage in MOSFETs as gate insulators or as spacer...
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Electronic, magnetic and optical properties of atomically controlled complex oxide heterostructures and interfaces
... black when the oxygen vacancy concentration increases Photoluminance can also be induced by oxygen vacancies in STO [27, 28] LAO is also a band insulator with a band gap of 5.6 eV and a lattice ... Magnetoresistance Anisotropy in LaAlO3/SrTiO3 Interfaces) ISOE 2011, Corsica, France (2011.10) (Poster: Electronic Phase Separation at LaAlO3/SrTiO3 Interfaces) 5th MRS -S conference on Advanced Materials, Singapore ... Brinkman, Asst Prof Wei Chen, Prof Ganaphathy Baskaran, Assoc Prof Jun Ding, Asst Prof Andrivo Rusydi, Joost Beukers, Jae Sung Son, Yongliang Zhao, Teguh Citra Asmara, Tarapada Sarkar, Dr Guanjun...
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Electronic, magnetic and optical properties of oxide surfaces, heterostructures and interfaces role of defects
... maglev train system, electricity grids, and high magnetic field generators) and various microscopic electronic devices (such as CMOS, optoelectronic, and memory devices), as well as chemical catalysis, ... superconductivity and colossal magnetoresistance This PhD thesis involves diverse research topics related to oxides and oxide heterostructures What is common in all of my research topics is pulsed laser deposition, ... including vacancies, interstitial atoms, off-center ions, antisite defects and topological defects, line defects (e.g., dislocations), planar defects including grain boundaries and stacking faults,...
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Effects of simultaneous doping with boron and phosphorous on the structural, electronic and optical properties of silicon nanostructures
... terminating the surface dangling bonds with H; whereas the faceted Si-nc are resulting from a shell-by-shell construction procedure, which starts from a central atom and adds shells of atoms successively ... (black) impurities have been located at sub-surface position in substitutional sites on opposite sides of the Si-nc 2.2 B and P codoped Si nanocrystals Since Fujii et al [9] have shown that B and ... impurities occupy substitutional sites of the Si-nc, we always locate the B and P impurity atoms substitutionally in the Si layer just below the nanocrystal surface, since we have previously demonstrated...
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First principles optical properties of silicon and germanium nanowires
... so far in order to clarify the experimental evidences and investigate the potential applications of such nanoscale materials In fact, the theoretical panorama is essentially based either on ab-initio ... electronic wavefunctions and can be used to obtain the dielectric function according to the independent particle picture or IP-RPA (independent particle-random phase approximation) level as a sum ... Kholod, V. L Shaposhnikov, N Sobolev, V. E Borisenko, F .A D’Avitaya, S Ossicini, Physical Review B 70 (2004) 035317 [31] T Ogawa, T Takagahara, Physical Review B 44 (1991) 8138 [32] Y Zheng, C Rivas,...
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Electronic structure and magneto optical properties of solids v antonov, b harmon, a yaresko
... many–particle systems and atomic systems or clusters of several atoms Macroscopic systems contain N ≈ 1023 particles and effects occurring on a N −1 or N −1/3 scale are negligibly small Atoms ... normal LSD calculation and λσ are Lagrange parameters ij The SIC removes unphysical self-interaction for occupied electron states and decreases occupied orbital energies Calculations for atoms have ... approximation Many calculations in the past decade have demonstrated that the local-spindensity approximation (LSDA) gives a good description of ground-state properties of solids The LSDA has...
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synthesis and optical properties of colloidal tungsten oxide nanorods
... these materials as well as for the preparation of inorganic derivatives such as WS2 Preliminary results show that the same synthetic strategy can be applied to obtain nanorods of cobalt oxides, and ... nanorods might originate from the presence of oxygen vacancies or defects; longer nanorods would possess more defects due to faster 1-D crystal growth and thus more intense PL emission associated ... emission spectra feature an additional blue emission peak at 2.84 eV (437 nm), and the intensity of this peak increases relative to that of UV emission as the length of nanorods increases A similar...
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characterization and optical property of zno nano-,
... Hydrothermal synthesis of ZnO nanowires and nanobelts on a large scale, Mater Chem Phys 106 (2007) 58–62 [26] M .S Niasari, F Davar, A Khansari, Nanosphericals and nanobundles of ZnO: synthesis and characterization, ... [17] R Bacsa, Y Kihn, M Verelst, J Dexpert, W Bacsa, P Serp, Large scale synthesis of zinc oxide nanorods by homogeneous chemical vapour deposition and their characterization, Surf Coat Technol ... However, surface states have also been identified as a possible cause of the visible emission in the ZnO nanomaterials It is reasonable that there are some defects in the column-like ZnO microrods...
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