Investigation of electronic and optical properties of molybdenum disulfide modulated by surface functionalization
Investigation of electronic and optical properties of molybdenum disulfide modulated by surface functionalization
... background and literature review 1.1.1 Synthesis of 2D TMDCs 1.1.2 Electronic, optical and vibrational properties of TMDCs Electronic structure Optical properties ... preparation and device fabrication 69 4.3 Modulating MoS2 FET electronic transport properties by Cs2CO3 surface functionalization 71 4.4 Modulating optical properties of MoS2 by Cs2CO3 ... layer numbers 1.1.2 Electronic, optical and vibrational properties of TMDCs Electronic structure The band structures of many TMDCs have been calculated by using first principles and tight-binding...
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Effects of simultaneous doping with boron and phosphorous on the structural, electronic and optical properties of silicon nanostructures
... 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 3.2 3.4 ... systematic analysis of the effect of the B and P codoping in Si-nw, concentrating not only on the structural properties but also on how doping influences the electronic and optical properties Here, ... concentrate on the dependence of the doped Si-nw properties on the dopant concentration, we note first that on augmenting the number of atoms in the cell (thus lowering the dopant concentration),...
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Investigation of electroactive ultrathin films by surface plasmon spectroscopy
... Techniques……………………………………………29 3.1.1 Surface plasmon spectroscopy ………………………………………….29 3.1.2 Electrochemical -surface plasmon spectroscopy …………………… 32 3.1.3 High pressure surface plasmon spectroscopy with electrochemical ... convenience and surface plasmon is used for short The aim of this study is to combine surface plasmon spectroscopy (SPS) with other techniques to investigate electroactive polymer films Therefore, ... Gratings fabricated by these two methods could be used for the surface plasmon coupling The process of PANI / SPANI multilayer film manipulated on the Au surface by the Layer -by- Layer technique...
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Electronic, magnetic and optical properties of atomically controlled complex oxide heterostructures and interfaces
... ELECTRONIC, MAGNETIC AND OPTICAL PROPERTIES OF ATOMICALLY CONTROLLED COMPLEX OXIDE HETEROSTRUCTURES AND INTERFACES XIAO WANG (B.Sc, Shandong University, P.R China) ... spin and orbital degree of freedom in complex oxides, new properties can emerge at the interfaces of atomically flat oxide heterostructures, because of the inherent discontinuities at the interfaces ... purpose of the research and key results of my studies will be briefly discussed 1.2 Perovskite Oxide and Interfaces 1.2.1 Perovskite Oxides 24 Perovskite oxide is a class of complex oxides with...
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Investigation of electronic and magnetic properties of pristine and functionalized graphene
... layers and hence open an energy gap29,36 The origins of those outstanding properties of both single layer graphene and bilayer graphene can be explored from graphene s unique crystal and electronic ... leveraged by the outstanding properties of graphene and its chemical derivatives To realize its electronic applications, it is important to understand its band structure, and the effects of many-body ... then 1.1.2 Electronic properties of graphene The discovery of both single-layer graphene (SLG) and bilayer graphene (BLG) has revolutionized the physics of low dimensional systems1,11,26 and led...
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Electronic, magnetic and optical properties of oxide surfaces, heterostructures and interfaces role of defects
... not all defects in oxides are detrimental for applications Instead, they have their own specific roles in determining the electronic, magnetic and optical properties of oxides and oxide heterostructures ... bonds and prone to a variety of cationic and anionic point defects energetically favorable in such materials Point defects could significantly affect the electronic, magnetic, optical and mechanical ... and magnetic properties of SrRuO3/LaAlO3 (SRO/LAO) superlattices By varying the thickness of SRO layers in the superlattices, we are able to modulate both electrical and magnetic properties of...
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synthesis and optical properties of colloidal tungsten oxide nanorods
... arc-lamp, excitation at 275 nm) of the three tungsten oxide nanorod samples of various lengths dissolved in dichloromethane Figure Photoluminescence spectra of tungsten oxide nanorods; 25 ( nm (short), ... micrographs of (a) ( 0.5 nm × 25 ( nm and (b) ( 1.5 nm × 130 ( 30 nm tungsten oxide nanorods Little is known about the photoluminescence of nanostructured tungsten oxides.21 Figure shows the room-temperature ... 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...
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fabrication and optical properties of ordered sea urchin-like zno
... 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 urchin-like ... results of Fig 2d For analyzing the photoelectric properties of the sea urchin-like ZnO nanostructures, simple battery devices were fabricated Fig shows the I–V curve of the sea urchin-like ZnO nanostructures...
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synthesis and optical properties of au-ag alloy nanoclusters with controlled composition, p26
... Biosynthesis of Bimetallic Au-Ag Alloy Nanoparticles”, Small, Vol 1, pp 517-520, 2005 [25 P Raveendran, J Fu, and S L Wallen, “A simple and green method for the synthesis of Au, Ag, and Au–Ag alloy ... Figure Calculated optical absorption spectra for Au-Ag bimetallic colloidal solutions with different molar ratios of Au and Ag Conclusions Au-Ag nanoclusters of solid-solution alloy type could ... spectra of the colloidal samples (prepared with second set of metal ion solutions) with nominal molar ratio a) Au/Ag = 1/1 and b) Au/Ag = 3/1 Calculated optical absorption spectra of the colloids with...
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Báo cáo toán học: " The structural and optical properties of GaSb/InGaAs type- quantum dots grown on InP (100) substrate" ppt
... investigated the structural and optical properties of type-II GaSb/InGaAs QDs grown on InP (100) substrate using molecular beam epitaxy [MBE] Experiments GaSb/InGaAs type-II QDs were grown on the (100) ... independent of the excitation power which is a typical feature of the type-I band transition Therefore, the interband transition of the GaSb QD would be the only proper origin of the high-energy ... bottom of the conduction band of GaSb QDs In such circumstance, the light emission intensity of the GaSb QD could be stronger than the type II transition due to the stronger spatial confinement of...
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Báo cáo toán học: " Structural and optical properties of ZnS thin films deposited by RF magnetron sputtering" potx
... Hwang et al.: Structural and optical properties of ZnS thin films deposited by RF magnetron sputtering Nanoscale Research Letters 2012 7:26 Author details School of Materials Science and Engineering, ... 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 ... and optical properties of ZnS films deposited by close-spaced evaporation Appl Surf Sci 2006, 253:2409-2415 Shao LX, Chang KH, Hwang HL: Zinc sulfide thin films deposited by RF reactive sputtering...
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Báo cáo hóa học: " Effects of silver impurity on the structural, electrical, and optical properties of ZnO nanowires" doc
... J/cm2, and the shot area on the target surface was 0.042 cm2 Before the deposition, there should be pre-deposition process for The deposition process continued for 30 The structural and (a) (b) optical ... http://www.nanoscalereslett.com/content/6/1/552 (a) Au catalyst 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 ... enables the synthesis of oxide NWs while controlling the doping concentration feature The doping could be controlled by adjusting the target composition since it guarantees the transfer of the composition...
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Báo cáo hóa học: " Synthesis, magnetic and optical properties of core/shell Co1-xZnxFe2O4/SiO2 nanoparticles" pot
... 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 properties of the ferrite ... the magnetic properties and diffuse reflectance of the prepared ferrite nanoparticles, respectively Results and discussion Figure 1a, b, c shows the X-ray diffraction patterns of core/shell Co1-xZnxFe2O4/SiO2 ... 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 ferrite...
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