ferromagnetism in zno doped with transition metal ions

Báo cáo hóa học: " Solar light-driven photocatalytic hydrogen evolution over ZnIn2S4 loaded with transition-metal sulfides" pptx

Ngày tải lên : 21/06/2014, 04:20

... Pt-loaded MS/ZnIn S (MS = SnS and CuS) on the loading amount of transition- metal sulfides With the increase of SnS-loading from to 2.0 wt.%, the rate of H evolution over PtSnS/ZnIn S does not ... with ZnIn S , ZnIn2S4, and CuS/ZnIn2S4 photocatalysts were investigated by TEM A representative TEM image of ZnIn2S4 is shown in Figure 3A, which shows the formation of microspheres, 1-2 μm in ... shown in Figure S5 (Additional file 1) The survey scan spectrum (Figure S5A of Additional file 1) indicated the presence of Cu, Zn, In, and S in the sample [21,31] The binding energies shown in...

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Room tepmeaterature ferromagnetism in zno based magnetic semiconductors and carbon related systems

Ngày tải lên : 10/09/2015, 15:50

... temperature ferromagnetism in ZnO materials, such as nonmagnetic metal clusters inducing ferromagnetism in metallic Zn doped ZnO films [33] and p-p interaction inducing ferromagnetism in 14 Chapter Introduction ... Nonmagnetic metal clusters inducing ferromagnetism in ZnO based materials 15 1.5.2 p-p interaction inducing ferromagnetism in C -doped ZnO films 17 1.6 Applications of ZnO based magnetic ... promising host materials for spintronics applications were Co doped ZnO, Al doped ZnO, Pt doped ZnO, Fe doped In2 O3, Pt doped oxides and defects-related C systems The origin of ferromagnetism in...

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Báo cáo hóa học: " First-Principles Study of Magnetic Properties of 3d Transition Metals Doped in ZnO Nanowires" potx

Ngày tải lên : 22/06/2014, 01:20

... arrow indicates that the two states with the same spin channel couple with each other Fig The DOS of 3d levels for a, b two Cr ions in their FM coupling state, c, d two Co ions in their FM coupling ... decreases, indicating that the doping becomes more difﬁcult with decreasing diameter Finally, it is found that the ferromagnetic state of Cr doped is more stable in nanowires than in the bulk, leading ... ZnO nanowire in different conﬁgurations, and found that the ferromagnetic coupling between the Mn ions exists in the ZnO nanowire with unpassivated surfaces while not in the nanowire with passivated...

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Multiphoton absorption and multiphoton excited photoluminescence in transition metal doped znsezns quantum dots

Ngày tải lên : 11/09/2015, 10:06

... 2PA and 3PA crosssections The later was mainly caused by the introduction of new doping and defect energy levels by the incorporated transition metal ions Transition metal doping provided an option ... He interpreted his experimental results as direct DonorAcceptor recombination involving CuZn and Cu-X centers combined with indirect recombination via excited states of these centers Doping introduced ... red solid line is a lognormal fit (Page 100) Fig 4.2 XRD patterns of un -doped (red line), Cu -doped (green line) and Mn -doped (blue line) ZnSe/ZnS QDs The dotted lines are the fits with Lorentzian...

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Investigation on K2Ti4O9 Whisker Absorbent and Applications in Heavy Metal Ions Removal

Ngày tải lên : 05/09/2013, 09:38

... because that with a given content of the metallic ions in water, as the quantity of absorbent (PTW) increases, the active sites of the absorbent increases, which results in more metallic ions absorbed ... more metallic ions absorbed and less ions remain in water in equilibrium, showing as the removal of metallic more ions In the mean time, as the ion content in water decreases, the absorption potential ... It is fabricated by mixing titanium oxides and potassium oxides in a certain ratio, with a suitable calcination flux, and calcining at 900 – 1100°C The reaction during calcination is: 4TiO2 + K2O→...

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gas - sensing properties of tin oxide doped with metal oxides and carbon

Ngày tải lên : 19/03/2014, 16:48

... temperature of the PtO2 -doped SnO2 sensors with varying PtO2 doping content Please cite this article in press as: N Van Hieu, et al., Gas-sensing properties of tin oxide doped with metal oxides and ... nanofabrications, characterizations and applications to electronic devices, gas sensors and biosensors Nguyen Anh Phuc Duc received the BS degree in Engineering Physics from Institute of Engineering in ... extensively investigated Therefore, for comparison with metal oxides -doped SnO2 sensors, we have prepared and characterized MWCNTs -doped SnO2 sensors in the same route as metal oxides -doped sensors in...

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Báo cáo "The role of color luminescence centers Mn, Cu, Co in the semicondutors with wide band gap ZnS, ZnO and their applications " pptx

Ngày tải lên : 22/03/2014, 11:20

... substituted in both positions of Zn2+ ions and vacancies of Zn in ZnO crystal With the increasing of concentration of Co beyond 10-1 mol%, interaction can occur between Co2+ ions and ions of the ... mol%) was doped in ZnO, the presence of Co2+ ions resulted in change in the PL spectrum of ZnO As exciting by the wavelength of 632.8 nm from He-Ne laser, the PL spectra of bulk sample ZnO: Co show ... 181-187 When doping Cu, Mn in ZnS and Co in ZnO, the self-activated luminescence bands characterized by vacancies of zinc and oxygen are extinguished or their intensities decrease In PL spectra...

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Báo cáo khoa học: Heavy metal ions inhibit molybdoenzyme activity by binding to the dithiolene moiety of molybdopterin in Escherichia coli pdf

Ngày tải lên : 23/03/2014, 06:20

... may be caused by binding to zinc binding proteins, e.g proteins that contain zinc ﬁnger protein structures [30] Zinc and cadmium are in the same group in the Periodic Table, contain the same common ... the intestinal wall in humans with relative ease [34–36] Vanadate ions also mimic most of the rapid actions of insulin in the cell [37] In this report, we examined the in vivo and in vitro incorporation ... mixture did not result in their insertion into MPT (data not shown) In addition, we tested the insertion of metal ions into MPT-containing hSO None of the metals was inserted into hSO (Fig 3B), which...

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Báo cáo hóa học: " The Study of Quantum Interference in Metallic Photonic Crystals Doped with Four-Level Quantum Dots" pot

Ngày tải lên : 22/06/2014, 00:20

... optical gain enhancement [20] and photoluminescence enhancement [21], optical switching [22, 23], quantum information processing [24, 25] and electromagnetically induced transparency [26] QI in a ... the QDs doped in 3D–PCs have been widely studied, both experimentally and theoretically [15–19] Controlling spontaneous emission by using quantum optics would lead to several interesting effects, ... band gap in the rage of visible frequencies [7, 29, 30] In many photonic band structure calculations related to MPCs, the refractive index function for metallic materials is derived using the...

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Study on kinetics of electro-optical and photoluminescent processes in nanostructured transition metal (W, Mo) oxide-based thin films

Ngày tải lên : 25/03/2015, 11:58

... doping, including interactions with induced charges at the dielectric discontinuity, requires investigation Fundamentally, quantum confinement pushes up the allowed energies resulting in an increase ... 3.6 Metal in contact with insulating oxide The usual diagram for an insulator in contact with a metal is shown in Figure 3.6; Φ will in general be less than the work function of the metal against ... controlled, continuously tunable light transmission Computer modeling of energy flows in buildings equipped with windows having this capability show significant energy savings in some locations and...

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Supported group II transition metal catalysts in liquid phase reactions using borrowing hydrogen methodology 2

Ngày tải lên : 08/09/2015, 19:36

... that this thesis is my original work and it has been written by me in its entirety, under the supervision of Prof Stephan Jaenicke, (in the laboratory catalysis lab in S5-04-04 and S5-02-02), ... for any degree in any university previously The content of the thesis has been partly published in: H H Liu, G K Chuah, S Jaenicke*, N-alkylation of amines by alcohols over alumina-entrapped Ag ... Department, National University of Singapore, between August 2008 and December 2012 I have duly acknowledged all the sources of information which have been used in the thesis This thesis has also...

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Supported group II transition metal catalysts in liquid phase reactions using borrowing hydrogen methodology 1

Ngày tải lên : 09/09/2015, 10:14

... cross-coupling reactions represent a class of synthetic transformations that involve the combination of an organometallic reagent (in most of cases containing a main group metal atom) with an organic ... Various metals and metal oxides including group 11 transition metals have been applied in oxidation reactions [21] Table 1-3 lists several oxidation reactions that have been catalysed by group 11 metals ... condition for an incident plane wave of wavelength λ, inclined at angle θ, illuminating a crystal structure with dhkl spacing Figure 2-4 TEM principle: (a) diffracting mode and (b) imaging mode Both...

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4d transition metal doped lini0 5mn1 5o4 cathodes for high power lithium batteries

Ngày tải lên : 10/09/2015, 15:52

... Chapter Ru doped LiNi0.5Mn1.5O4 with spinel structure 47 3.1 Material design 47 3.1.1 Ru doped LiNi0.5Mn1.5O4 with perfect spinel structure 48 3.1.2 Ru doped LiNi0.5Mn1.5O4 with ... in Nb doped samples Suffering from LiNbO3, Nb doped LiNi0.5Mn1.5O4 exhibit poor electrochemical performances even at low rates Several methods attempting to obtain Ru doped LiNi0.5Mn1.5O4 spinels ... performances of the spinel-structured LiNi0.5Mn1.5O4 at high current rate by adopting 4d transition metal doping strategy As introduced in Chapter 1, 4d transition metal ions possess large 4d...

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Syntheses and catalysis of transition metal complexes with hemilabile ligands 1

Ngày tải lên : 11/09/2015, 10:18

... Phosphine-oxazoline ligands 14 1.3.2.2 Phosphine-pyridine ligands 15 1.3.2.3 Phosphine-amine ligands 15 1.3.2.4 Phosphine-imine ligands 17 1.3.3 Bis(phosphine)amine ... and offering encouragement xvii Chapter Chapter – General Introduction 1.1 Transition metal catalysts Transition metal catalysts have been long used in industries and laboratories ranging from ... (TlOEt or NaH) or reaction with a metal species.25 An example is listed in equation 1.1.25b These resultant metal complexes often give rise to interesting applications in coordination chemistry and...

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Syntheses and catalysis of transition metal complexes with hemilabile ligands

Ngày tải lên : 11/09/2015, 10:18

... and halide-bridge formation, thus reducing the metal sphere congestion promoting metalsubstrate interaction Indeed, a significant increase in the cross coupling product is observed (Table 5.1, entry ... anions were disordered into two positions with occupancy ratio 60:40v and 54:46 Cl atoms of the dichloromethane unit were disordered into two positions with occupancy ratio 52:48 Restraints in ... subject to heating in THF at 60°C for h (Figure 5.4) in the presence of dba The ability of dba to keep the metal (in form of C11) in solution is apparent.158 Upon prolonged stirring in the absence...

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Experimental computational studies on transition metal silicides for novel applications in advance CMOS technologies

Ngày tải lên : 12/09/2015, 11:01

... mapped into equivalent observables in a single-particle problem as in DFT-LDA, there still remains the formidable task of handling an infinite number of noninteracting electrons moving in the ... only the metal in contact with the Si in source, drain, and polysilicon gate regions transforms to silicide, while the other part in contact with the SiO2 spacers remains as pure metal The metal ... by Intel CPUs With increase of the number of the transistors integrated, the cost of implementing the same functions decreases While silicon-based components and platform ingredients gaining in...

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Experimental computational studies on transition metal silicides for novel applications in advance CMOS technologies 2

Ngày tải lên : 13/09/2015, 20:19

... tensile strain induced by Si substrate, the atomic distance in the perpendicular axis is compressed accordingly In terms of energetics, the higher the in- plane strain, the smaller the interface ... MSi2/Si(001) interface structures with substrate strain varying from 0% to 100% Table 6.3 Minimum total energy and interface formation energy of various MSi2/Si(001) interface structures with substrate ... absorption thin film Figure 4.3 Schematic diagram of thin film with (a) two-step interface and (b) sinusoidal interface configurations Figure 4.4 Calculation results of Si Raman peak intensity attenuation...

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Transition metal and rare earth doped stoichiometric lithium niobate crystals for holographic recording

Ngày tải lên : 16/09/2015, 17:13

... method) using Li – rich melts or form K2O containing melts With reduced intrinsic defects the LN crystals can be made photorefractive by selectively doping with single or multiple transition metal ... sustain very high incident power density of ~150kW/cm2 ii Plane wave hologram recording with increasing power densities was performed in doped SLN crystals Total recording time ~1sec was obtained ... recording using green recording light and UV gating light Fig.6.3 Recording of hologram using 5W/cm2 recording density and 200mW/cm2 gating light density Fig.6.4 Second recording of hologram using...

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Báo cáo y học: "he Association Among Lipoprotein-associated Phospholipase A2 Levels, Total Antioxidant Capacity and Arousal in Male Patients with OSA"

Ngày tải lên : 25/10/2012, 11:00

... hypopnea Individuals with an apnea hypopnea index (AHI) >5 were diagnosed as OSAS and included in the study Determining of Arousals An arousal was defined as an increase in EEG and/or EMG activity ... drawn into serum separator clot activator tubes at 9:00 A.M from patients after overnight fasting within 48 hours of polysomnography Lp-PLA2 Lp-PLA2 concentrations were measured in serum samples with ... triglyceride levels were increased in patients above median arousal and TAC was reduced in these subjects Other demographic and laboratory findings were comparable in two groups According to the arousal...

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Báo cáo y học: "Replacement of cisplatin with nedaplatin in a definitive 5-fluorouracil/ cisplatin-based chemoradiotherapy in Japanese patients with esophageal squamous cell carcinoma"

Ngày tải lên : 26/10/2012, 09:53

... toxicity in the treatment of ESCC [16] In this study, the effects of replacing CDDP with NDP on the pharmacokinetics of 5-FU 306 were investigated in ESCC patients treated with a definitive 5-FU/CDDP-based ... summarized in Table In the CDDP group, the plasma concentrations of 5-FU were significantly higher in the patients with CR than those with non-CR (P

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