selenide and sulfide quantum dots and nanocrystals optical properties
Functional lanthanide doped upconversion nanocrystals optical properties and mechanism study
... the fine-tuning of optical properties and functionalization of upconversion nanocrystals is presented in the next section Chapter 1.5 Optical properties tuning of upconversion nanocrystals 1.5.1 ... based biodetection56 and so on Quantum dots and wide bandgap semiconductors Besides organic molecules, several groups have coupled a variety of semiconductors to the upconversion nanocrystals through ... nanotechnology has offered the development of lanthanide-doped nanocrystals with advance optical and structural properties. 7 Lanthanide-doped nanocrystals Chapter Figure 1.1 Partial 4f energy level...
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Electronic structure and magneto optical properties of solids v antonov, b harmon, a yaresko
... 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 ... 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 ... structure, optical, MO, and XMCD properties of compounds and multilayered structures Chapter of this book is of an introductory character and presents the theoretical foundations of the band theory...
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facile route to straight sno2 nanowires and their optical properties
... 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...
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Controlled synthesis of nanostructures and their optical properties
... Heterostructured Sandwiched Nanorods 3.1 38 Deposition of Au on the CdS|CdSe|CdS and CdSe|CdS|CdSe sandwiched nanorods ……………….…………………………… 3.4 34 Optical properties of the CdS|CdSe|CdS and CdSe|CdS|CdSe sandwiched ... Synthesis and characterization of the CdS|CdSe|CdS and CdSe|CdS|CdSe sandwiched nanorods ………………………… 3.2 32 41 Optical properties of the Au-deposited CdS|CdSe|CdS and CdSe|CdS|CdSe sandwiched ... ABA and (b) BAB nanorods prepared The d- spacings identified were 3.3 Å for CdS (002) and 3.5 Å for CdSe (002) in both (a) and (b) 3.2 Optical properties of the CdS|CdSe|CdS and CdSe|CdS|CdSe sandwiched...
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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
... 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 ... promising application on 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 ... Medeiros-Ribeiro G: Optical and structural properties of InAsP ternary self-assembled quantum dots embedded in GaAs Appl Phys Lett 2002, 81:2953 15 Liu G, Chuang S-L, Park S-H: Optical gain of strained...
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Báo cáo hóa học: " Optical properties of as-grown and annealed InAs quantum dots on InGaAs cross-hatch patterns" doc
... 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 ... Himwas et al.: Optical properties of as-grown and annealed InAs quantum dots on InGaAs cross-hatch patterns Nanoscale Research Letters 2011 6:496 Submit your manuscript to a journal and benefit from: ... Ustinov VM, Egorov AY, Zhukov AE, Kop’ev PS, Bert NA, Alferov ZI: Structural and optical properties of InAs-GaAs quantum dots subjected to high temperature annealing Appl Phys Lett 1996, 69:3072-3074...
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báo cáo hóa học:" The structural and optical properties of GaSb/InGaAs type-II quantum dots grown on InP (100) substrate" docx
... Medeiros-Ribeiro G: Optical and structural properties of InAsP ternary self-assembled quantum dots embedded in GaAs Appl Phys Lett 2002, 81:2953 15 Liu G, Chuang S-L, Park S-H: Optical gain of strained ... The structural and optical properties of GaSb/InGaAs type-II quantum dots grown on InP (100) substrate Nanoscale Research Letters 2012 7:87 Submit your manuscript to a journal and benefit from: ... type-II GaSb/GaAs quantum dots Appl Phys Lett 1995, 67:656 10 Alonso-Álvarez D, Alén B, García JM, Ripalda JM: Optical investigation of type II GaSb/GaAs self-assembled quantum dots Appl Phys Lett...
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Báo cáo hóa học: " The structural and optical properties of GaSb/InGaAs type-II quantum dots grown on InP (100) substrate" ppt
... Medeiros-Ribeiro G: Optical and structural properties of InAsP ternary self-assembled quantum dots embedded in GaAs Appl Phys Lett 2002, 81:2953 15 Liu G, Chuang S-L, Park S-H: Optical gain of strained ... The structural and optical properties of GaSb/InGaAs type-II quantum dots grown on InP (100) substrate Nanoscale Research Letters 2012 7:87 Submit your manuscript to a journal and benefit from: ... type-II GaSb/GaAs quantum dots Appl Phys Lett 1995, 67:656 10 Alonso-Álvarez D, Alén B, García JM, Ripalda JM: Optical investigation of type II GaSb/GaAs self-assembled quantum dots Appl Phys Lett...
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Báo cáo hóa học: " Effects of Shape and Strain Distribution of Quantum Dots on Optical Transition in the Quantum Dot Infrared " doc
... self-assembled dots: an eight-band study, Phys Rev B 56, 4696 (1997) 16 O Stier, M Grundmann, D Bimberg, Electronic and optical properties of strained quantum dots modeled by 8-band kÁp theory, ... InAs QD with the height and base ˚ being 80 and 168 A, respectively, and lense-shaped InAs ˚ QD with the height and diameter being 80 and 240 A, respectively The distribution and value of strain ... strain eH and the biaxial strain eB are defined as eH ðrÞ ¼ exx ðrÞ þ eyy ðrÞ þ ezz ðrÞ ð3Þ eB ðrÞ ¼ exx ðrÞ þ eyy ðrÞ À 2ezz ðrÞ VHH and VLH are the heavy-hole and light-hole bands, ac, av and b...
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Báo cáo hóa học: " Excitonic Transitions and Off-resonant Optical Limiting in CdS Quantum Dots Stabilized in a Synthetic Glue Matrix" pptx
... theoretical ratios and experimental ratios agree well if we assign the first four bands observed in PAS to 1se–1sh (band E1), 1pe–1ph (band E2), 1de–1dh (band E3) and 2pe–2ph (band E4) Optical Limiting ... spectroscopy and analyzed in detail using noninteracting particle model We assign the first four bands observed in PAS to 1se–1sh (band E1), 1pe–1ph (band E2), 1de–1dh (band E3) and 2pe–2ph (band E4) ... the host glue matrix and the CdS nanocrystals embedded host matrix Figure shows the optical absorption spectra (OAS) of CdS nanocrystals in glue matrix of samples C1, C2, C3 and C4 The host matrix...
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Báo cáo hóa học: " Influence of GaAs Substrate Orientation on InAs Quantum Dots: Surface Morphology, Critical Thickness, and Optical Properties" docx
... examine the optical properties, samples B, C and E were selected to measure the temporal PL (TRPL) behaviors The measured PL band positions were indicated by the letters in Fig 2a and the corresponding ... further increased to 11.4° and 15.8°, i.e., for samples D and E, as shown by the AFM images in Fig 1g and h there were no QDs found The InAs growth was still 2D growth and QW was formed on each ... typical QW and normal WL of InAs QDs These observations show that the formation and the optical properties of the quantum structures strongly depend on the substrate orientation The InAs QDs formation...
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FINGERPRINTS IN THE OPTICAL AND TRANSPORT PROPERTIES OF QUANTUM DOTS ppt
... Optical and Transport Properties of Quantum Dots, Edited by Ameenah Al-Ahmadi p cm ISBN 978-953-51-0648-7 Contents Preface IX Section Optical Properties of Quantum Dot Systems Chapter InAs Quantum ... Dots of Engineered Height for Fabrication of Broadband Superluminescent Diodes S Haffouz and P.J Barrios Chapter Influence of Optical Phonons on Optical Transitions in Semiconductor Quantum Dots ... Molecules in Self-Organized InP/GaInP Quantum Dots Alexander M Mintairov, James L Merz and Steven A Blundell Chapter InAs Quantum Dots in Symmetric InGaAs/GaAs Quantum Wells 153 Tetyana V Torchynska...
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Báo cáo " Sol-gel synthesis and particle size characterization of CdSe Quantum dots " ppt
... Synthesis CdSe quantumdots and determine its size from optical spectra, Advances in Optics Photonics Spectroscopy & Applications V (2008) 517 S.V.Gaponenko, Optical Properties of Semiconductor Nanocrystals, ... reaction and its distribution in particle size is in the broadening range In this article, we report on the preparation of CdSe quantum dots (QDs) by sol-gel method and investigate their optical properties ... between mean size and specific parameters of QDs [7]: a a E g (a ) = E g + π R B − 1,786R * B − 0,248R * y y a a * y (1) where E g(a) is the effective band gap of QDs with...
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SYNTHESIS OF CDTE AND PBS SEMICONDUCTOR QUANTUM DOTS AND
... stabilized CdTe quantum dots 14 2.3.1.2 L-Cysteine stabilized CdTe quantum dots 14 2.3.1.3 CA stabilized CdTe quantum dots 14 2.3.2 Synthesis of water soluble CdHgTe quantum dots ... protoporphyrin-IX 38 3.3.3 Singlet oxygen detection using SOSG™, and CdTe quantum dots 39 3.4 Conclusion 46 LEAD SULFIDE QUANTUM DOTS AND ITS APPLICATION IN CEA SENSING 47 4.1 Introduction ... science 1.2 Quantum Dots Quantum dots, the so-called nanocrystals, are nano-sized semiconductor particles composed of II-VI group or III-V main group elements Normally, the size of the quantum dots...
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Báo cáo hóa học: " Effective harvesting, detection, and conversion of IR radiation due to quantum dots with built-in charge" docx
... and B52) and with inter-dot doping (devices B45 and B53) In devices B44 and B52 (Figure 1a), the dopant sheet concentration was 2.7 × 1011 cm-2 and 5.4 × 1011 cm-2, respectively Devices B45 and ... one, two, and three spatial dimensions [13] This simulation tool self-consistently solves Schrödinger, Poisson, and current equations for electrons and holes The conduction and valence bands of ... made measurements related to quantum- dot infrared photodetectors JL and VM conducted the design and analysis of all experiments and modeling results All authors read and approved the final manuscript...
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Báo cáo hóa học: " A quantum dots and superparamagnetic nanoparticle-based method for the detection of HPV DNA" ppt
... cancer marker Her2 and other cellular targets with semiconductor quantum dots Nat Biotechnol 2003, 21:41-46 14 Huo Q: A perspective on bioconjugated nanoparticles and quantum dots Colloids Surf ... excited effectively under ultraviolet band, and their maximum emission peak is about 530 nm, which means the resultant quantum dots is fluorescence-active and could be used as a fluorescent probe ... electrophoresis Characterization of quantum dots Figure The UV absorbance spectrum of QDs The comparison between QDs and superparamagnetic nanoparticle-based hybridization and type-specific PCR was analysized...
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Báo cáo hóa học: " CdTe quantum dots with daunorubicin induce apoptosis of multidrug-resistant human hepatoma HepG2/ADM cells: in vitro and in vivo evaluation" pptx
... [3] CdTe quantum dots (Cdte QDs) have primarily received attentions in biological and biomedical fields due to their high luminescence efficiency, photostability, and broad absorption and narrow ... Access CdTe quantum dots with daunorubicin induce apoptosis of multidrug-resistant human hepatoma HepG2/ADM cells: in vitro and in vivo evaluation Gen Zhang1, Lixin Shi2, Matthias Selke2 and Xuemei ... nm and emission wavelength at 530 nm The drugs DNR and adriamycin were purchased from Sigma-Aldrich (St Louis, MO, USA) The RPMI 1640 cell culture medium was obtained from Gibco BRL (Grand Island,...
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Báo cáo hóa học: " One-Pot Synthesis of Biocompatible CdSe/CdS Quantum Dots and Their Applications as Fluorescent Biological Labels" doc
... water-soluble CdSe and CdSe/CdS type-I core–shell QDs with several nanometers in size The one-pot method can provide highquality biocompatible quantum dots without using expensive phosphines and complicated ... the advantages of simpleness, low cost, and green precursor Moreover, the as-received QDs show the tunable and bright PL emission with high quantum yields and high performance as fluorescent biological ... (dash) and PL (solid) spectra of the as-prepared PAA-capped CdSe QDs dispersed in water; b TEM and size distribution histogram; c HRTEM; and d SAED images of the as-synthesized PAA-capped CdSe nanocrystals...
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Báo cáo hóa học: " Interaction and Cooperative Nucleation of InAsSbP Quantum Dots and Pits on InAs(100) Substrate" ppt
... formation of either quantum wires or quantum dots, or even unique island–pit pairs The islands and pits first grow simultaneously as the layer deposition proceeds Both the island height and the pit depth ... QDs, the pits and dots pits cooperative structure growth on InAs(100) substrates by LPE, as well as the interaction and surface morphology of the dots pits combinations are presented and investigated ... QDs and black points to pits The QDs and pits are clearly visible and quite uniformly distributed over the substrate surface Figures 1b, c and 2b– d show that cooperative nucleation of the dots pits...
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