본문 바로가기
HOME> 저널/프로시딩 > 저널/프로시딩 검색상세

저널/프로시딩 상세정보

권호별목차 / 소장처보기

H : 소장처정보

T : 목차정보

Materials chemistry and physics 65건

  1. [해외논문]   In-situ growth of Se-doped NiTe on nickel foam as positive electrode material for high-performance asymmetric supercapacitor  

    Ye, Beirong (Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Huaqiao University, Xiamen, Fujian 361021, China ) , Huang, Miaoliang (Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Huaqiao University, Xiamen, Fujian 361021, China ) , Jiang, Si (Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Huaqiao University, Xiamen, Fujian 361021, China ) , Fan, Leqing (Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Huaqiao University, Xiamen, Fujian 361021, China ) , Lin, Jianming (Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Huaqiao University, Xiamen, Fujian 361021, China ) , Wu, Jihuai (Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Huaqiao University, Xiamen, Fujian 361021, China)
    Materials chemistry and physics v.211 ,pp. 389 - 398 , 2018 , 0254-0584 ,

    초록

    Abstract In this paper, Se-doped NiTe electrode materials for supercapacitor are synthesized through a one-step hydrothermal method by using Ni foam as Ni source and substrate. The as-obtained Se-doped NiTe electrode exhibits maximum specific capacitance of 998.2 F g −1 at the current density of 1 A g −1 , which is better than the value of NiTe electrode 603.6 F g −1 . Moreover, the Se-doped NiTe electrode assembled with AC electrode to form an asymmetric supercapacitor (ASC), which can extend the potential window to 1.6 V, and possesses of a superior energy density and power density of 42.7 Wh kg −1 and 800.6 W kg −1 at the current density of 1 A g −1 , respectively. In addition, the ASC shows an outstanding cycling stability (76.4% retained after 10,000 cycles). Highlights Se doped NiTe materials were in-situ grown on Ni foam by using a simple hydrothermal method. Se doped NiTe electrode exhibited maximum specific capacitance of 998.2 F g -1 . Se doped NiTe//AC ASC possess a high potential window of 1.6 V and superior energy density of 42.7 Wh kg -1 at a power density of 800.6 W kg -1 . Graphical abstract Flake-like Se doped NiTe electrode materials were synthesized through a one-step hydrothermal method by using directly Ni-foam as Ni source as well as substrate and shown high electrochemical performance. [DISPLAY OMISSION]

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  2. [해외논문]   Novel carbon nanospheres and poly(9-vinylcarbazole) composites: Synthesis, structural and photo-physical properties of films elaboration  

    Mbarek, M. (Corresponding author.) , Ghnimi, M. , Abbassi, F. , Alimi, K.
    Materials chemistry and physics v.211 ,pp. 399 - 405 , 2018 , 0254-0584 ,

    초록

    Abstract The photophysical and structural properties of poly(9-vinylcarbazole) and carbon nanospheres (CNS) based composites are investigated. The effect of CNS on the optical and vibrational properties of the new synthesized composite with several concentration weights (1.7, 3 and 5%) and also charge transfer process were examined by various optical and structural characterizations. Scanning and transmission electron microscopy were indented to show the morphology of CNS and their distribution on PVK matrix. States and time resolved photoluminescence decays of composites were used to evidence the charge transfer and dynamical properties of their excited states. The stability and the graphitized degree of CNS were found by Raman scattering analysis. Highlights Film composites morphology and CNSs dispersity are determined by SEM and TEM. Raman analysis was used to study stability and the degree of graphitized of CNSs. Vibrational analysis was used to examine the functionalization of CNS with PVK. Charge transfer was studied by stationary and transient photoluminescence. The non-radiative pathway is the preferred one of photo-generated excitons. Graphical abstract [DISPLAY OMISSION]

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  3. [해외논문]   On microstructural evolution and mechanical properties of Ti-5Al-5V-5Mo-3Cr alloy synthesised from elemental powder mixtures  

    Yang, Fei (Waikato Centre for Advanced Materials, School of Engineering, The University of Waikato, Hamilton 3240, New Zealand ) , Gabbitas, Brian (Waikato Centre for Advanced Materials, School of Engineering, The University of Waikato, Hamilton 3240, New Zealand ) , Dore, Martin (EIGSI, 26 rue de Vaux de Foletier, La Rochelle 17041, France ) , Ogereau, Audrey (EIGSI, 26 rue de Vaux de Foletier, La Rochelle 17041, France ) , Raynova, Stiliana (Waikato Centre for Advanced Materials, School of Engineering, The University of Waikato, Hamilton 3240, New Zealand ) , Bolzoni, Leandro (Waikato Centre for Advanced Materials, School of Engineering, The University of Waikato, Hamilton 3240, New Zealand)
    Materials chemistry and physics v.211 ,pp. 406 - 413 , 2018 , 0254-0584 ,

    초록

    Abstract In this paper, we explored to prepare a multi-compositional titanium alloy, Ti-5Al-5V-5Mo-3Cr (Ti-5553), by powder compact extrusion from elemental powder mixtures, and investigate the microstructure variation during the synthesising process and after post heat treatments and the changes of mechanical properties. XRD, OM and SEM were used to analyse the phase constitutions and microstructures of the Ti-5553 alloy at different processing conditions, and tensile tests were conducted to examine their mechanical properties. The results showed that a homogeneous Ti-5553 alloy was successfully produced by powder compact extrusion from the powder mixtures, β phase was mainly contained in the hot-pressed and 1200°C-extruded Ti-5553 alloy and had an equiaxed microstructure. Different types of α phase precipitated from the β matrix after heat treatment, and this significantly changed the microstructures and improved the mechanical properties of the extruded Ti-5553 alloy, with yield strength of 1250 MPa and ultimate strength of 1300 MPa for the alloy treated at 675 °C for 2 h, and the ductility of about 6.1% for the alloy treated at 780 °C for 2 h. Highlights Ti-5553 alloy were successfully synthesised by powder compact extrusion of elemental powder mixtures. The microstructure and composition distribution of the as-extruded Ti-5553 alloy were homogeneous. Discontinuous grain boundary α, acicular α, fine particle α, lath α and globular α were formed after heat treatment. The heat treated alloys had higher strength and ductility.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  4. [해외논문]   Antimonene nanoribbon band-gap expansion: Bond contraction and edge quantum entrapment  

    Wang, Sanmei (Key Laboratory of Low-Dimensional Materials and Application Technologies, (Ministry of Education), Hunan Provincial Key Laboratory of Thin Film Materials and Devices, School of Materials Science and Engineering, Xiangtan University, Hunan, 411105, China ) , Zhang, Xi (Institute of Nanosurface Science and Engineering, Shenzhen University, Shenzhen, 518060, China ) , Liu, Yonghui (Key Laboratory of Low-Dimensional Materials and Application Technologies, (Ministry of Education), Hunan Provincial Key Laboratory of Thin Film Materials and Devices, School of Materials Science and Engineering, Xiangtan University, Hunan, 411105, China ) , Huang, Yongli (Key Laboratory of Low-Dimensional Materials and Application Technologies, (Ministry of Education), Hunan Provincial Key Laboratory of Thin Film Materials and Devices, School of Materials Science and Engineering, Xiangtan University, Hunan, 411105, China ) , Sun, Chang Q. (School of Electrical and Electronic Engineering, Nanyang Technological University, 639798, Singapore)
    Materials chemistry and physics v.211 ,pp. 414 - 419 , 2018 , 0254-0584 ,

    초록

    Abstract Combining the bond-order-length-strength corrected tight-binding (BOLS-TB) theory and the density functional theory (DFT) calculation, we clarified the energetic origin of the width-dependent band gap ( E g ) expansion of the zigzag and armchair-edged antimonene nanoribbons (SbNRs) terminated by atomic hydrogen. Consistency between the density-function theory calculations and the BOLS-TB prediction affirmed that: (i) the E g expansion originates from the Hamiltonian correction due to the size-dependent undercoordination effect; (ii) both the contraction of the ribbon up to 11% and the edge quantum trapping of charge of 0.05e determine the width dependent Eg change; and, (iii) Under-coordination induced quantum entrapment in the armchair SbNRs is stronger than that of zigzag SbNRs, resulting in larger E g (∼0.3–0.6eV higher). Hence, the physical origin for the modulation of E g (1.2–3.1 eV) by edge quantum entrapment or by other under-coordinated sites will benefit the E g engineering of antimonene for wide electro-optical applications. Highlights A BOLS-TB theory modulation method is proposed to engineer the E g (1.2–3.1 eV) of antimonene by undercoordinated sites. Both the bond contraction and the edge quantum trapping determine the size-dependent E g change. The modulation of Eg will benefit the antimonene for wide electro-optical applications. Graphical abstract [DISPLAY OMISSION]

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  5. [해외논문]   Photocatalytic activity of Nitrogen and Silica doping on TiO2 nanocatalyst and grafted onto PMMA film  

    Klaysri, Rachan (Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand ) , Preechawan, Varistha (Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand ) , Thammachai, Noppongsathorn (Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand ) , Praserthdam, Piyasan (Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand ) , Mekasuwandumrong, Okorn (Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, NakornPathom 73000, Thailand)
    Materials chemistry and physics v.211 ,pp. 420 - 427 , 2018 , 0254-0584 ,

    초록

    Abstract In this paper, N-doped and Si-doped TiO 2 nanocatalyst as powder and grafted onto PMMA film have been prepared and tested for the photocatalysis toward methylene blue dye under UV and visible light irradiation. The samples were characterized by using X-ray diffraction (XRD), N 2 -physisorption, UV-visible spectroscopy (UV-vis), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR), scanning electron microscope with energy dispersive X-ray (SEM-EDX) and photoluminescence (PL). The kinetic were used to investigate the performance of grafted film of modified materials compared with pristine TiO 2 grafted onto PMMA film. The results showed that, kinetic constant parameter of modified TiO 2 were improved both as powder and grafted film. Highlights We report methods to synthesize N- and Si-doped TiO 2 grafted on PMMA film. We compared the photocatalytic activity of powder and powder-grafted on PMMA film. The visible light photocatalytic activity of powder improved after grafting on PMMA film. Graphical abstract [DISPLAY OMISSION]

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  6. [해외논문]   First principles study of ferromagnetism, optical and thermoelectric behaviours of AVO3 (A = Ca, Sr, Ba) perovskites  

    Mahmood, Q. (Institute of Physics, Centre for Advanced Studies in Physics (CASP), Government College (GC), University Lahore, 54000, Pakistan ) , Ali, S.A. (Materials Growth and Simulation Laboratory, Department of Physics, University of the Punjab, Lahore, 54590, Pakistan ) , Hassan, M. (Materials Growth and Simulation Laboratory, Department of Physics, University of the Punjab, Lahore, 54590, Pakistan ) , Laref, A. (Department of Physics and Astronomy, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia)
    Materials chemistry and physics v.211 ,pp. 428 - 437 , 2018 , 0254-0584 ,

    초록

    Abstract The structural, magnetic, optical and thermoelectric characteristics of CaVO 3 , SrVO 3 and BaVO 3 perovskite compounds computed by DFT scheme are presented. The electronic properties are computed to confirm the half-metallic ferromagnetism. The comparisons of crystal field, John Teller and the exchange energies elucidate that the electronic spins play a major role in inducing ferromagnetism. The complete set of computed optical parameters illustrate that the investigated perovskites are active for the visible and ultraviolet regions. The thermoelectric characteristics thoroughly elaborated, within the temperature range 200–800K, illustrate that the perovskites are also suitable for the energy renewable device applications. Highlights The half-metallic perovskites under the influence of cation variation is investigated. Exchange splittings higher than crystal field and John-Teller splittings evidence stable ferromagnetism. The magnetic moment of V reduces, while it induces at nonmagnetic locations that show strong hybridization. A broad absorption region in the visible and the UV energy illustrate potential optoelectronic applications. Thermoelectric behaviours illustrate that, except SrVO 3 , perovskites are suitable at lower temperatures.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  7. [해외논문]   Structure and ionic conductivity of nitrated lithium disilicate (LiSiON) glasses  

    Singh, Shiv Prakash (Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, São Carlos SP, Brazil ) , Schneider, José (Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, 13.566-590, Brazil ) , Fabiá (Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, São Carlos SP, Brazil ) , n (Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, São Carlos SP, Brazil ) , Kundu, Swarup (Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, São Carlos SP, Brazil ) , Rodrigues, Ana Candida Martins (Vitreous Materials Laboratory (LaMaV), Department of Materials Engineering, Federal University of São Carlos, São Carlos SP, Brazil ) , de Mattos, Paulo Parreira Gomes (Glass and Ceramic Laboratory, Chemical Sciences Institute (ISCR) (UMR CNRS 6226), University of Rennes, France ) , Zanotto, Edgar Dutra (Glass and Ceramic La) , Rocherullé , , Jean , Bé , nard-Rocherullé , , Patricia , Lebullenger, Ronan
    Materials chemistry and physics v.211 ,pp. 438 - 444 , 2018 , 0254-0584 ,

    초록

    Abstract Lithium disilicate is a critical glass forming composition as it is the basis of some glass-ceramics and it is also a model glass for the study of homogeneous and heterogeneous crystal nucleation. Incorporation of nitrogen in this glass significantly changes its structure and affects different properties. In this paper, nitrided lithium disilicate glasses were prepared by partial substitution of oxygen up to 6 atm % N/(N + O). The modification of the silicate glass structure with nitrogen has been confirmed by Fourier transform infrared reflection (FTIR) spectroscopy. 29 Si NMR and 7 Li NMR have also been used to investigate the structural changes due to nitrogen incorporation. Substitution of oxygen by nitrogen with a higher coordination number (three) increases the connectivity of the glass. In fact, our NMR results indicate that nitrogen incorporation changes the Q n distribution (n = average number of bridging oxygens to silicon) of the silicate structural units: SiNO 3 , SiN 2 O 2 and SiN 3 O, whereas there is no detectable change in the Li environment. We measured the ionic (Li + ) conductivity by impedance spectroscopy and found that the incorporation of nitrogen leads to a decrease in the activation energy for conduction, resulting in an increase of up to four-fold in the ionic conductivity of the most nitrided glass. We explained this high conductivity by the Anderson and Stuart model. This work provides renewed interest in improving and understanding the ionic conductivity in oxynitride glasses. Highlights Nitrided lithium disilicate glasses prepared by partial substitution of O 2 by N 2 . Incorporation of nitrogen decreases the activation energy for the conduction of Li + . Increase in the ionic conductivity up to four-fold for the most nitrided glass. Higher conductivity explained by the Anderson and Stuart model. Graphical abstract [DISPLAY OMISSION]

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  8. [해외논문]   Preparation parameters optimization and structure investigation of multiferroic bismuth ferrite  

    Hashem, H.M. (Corresponding author.) , Hamed, M.H.
    Materials chemistry and physics v.211 ,pp. 445 - 451 , 2018 , 0254-0584 ,

    초록

    Abstract Multiferroic bismuth ferrite, BiFeO 3 (BFO), was prepared using conventional solid state reaction method. The obtained powders were thermally treated at different temperatures (600–850 °C) and times (15 min–15 h) with two heating regimes (slow and fast) to investigate the optimum synthesis conditions. Rietveld refinement was applied to the X-ray diffraction data and Raman spectroscopy has been used to verify the phase purity. Both the temperature and time of the heat treatment were critical parameters to obtain the high BFO phase content. Sample of 95 wt% of BFO phase has been achieved by using fast heating/cooling regime of 30 min at 800 °C and leaching with HNO 3 to eliminate the impurity phases Bi 2 Fe 4 O 9 and Bi 25 FeO 40 . Upper and lower calcinations temperatures and times result in higher content of secondary phases. The Raman active modes confirmed the presence of the single phase of BFO. Additional physical measurement (electrical and magnetic) prove the multiferroic feature of BFO. The estimated high activation energy (0.89 eV) indicates the antiferromagnetic order. The magnetic hysteresis loops gives indication for the existence of a weak canting moment. Highlights Multiferroic bismuth ferrite (BiFeO 3 phase) was prepared using solid state reaction method. Thermal treatment (slow/fast heating regimes) was applied to optimize the synthesis conditions. XRD analysis (Reitveld refinement) and Raman spectroscopy were used to verify the phase purity. Electrical and magnetic properties were investigated to verify the multiforroic phenomenon.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  9. [해외논문]   Ni and Co doped yolk-shell type Fe2O3 hollow microspheres as anode materials for lithium-ion batteries  

    Qi, Xinhong (State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology, Linggong Road 2#, Dalian 116024, China ) , Yan, Zhijun (State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology, Linggong Road 2#, Dalian 116024, China ) , Liu, Yang (State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology, Linggong Road 2#, Dalian 116024, China ) , Li, Xiangcun (State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology, Linggong Road 2#, Dalian 116024, China ) , He, Gaohong (State Key Laboratory of Fine Chemicals, Chemical Engineering Department, Dalian University of Technology, Linggong Road 2#, Dalian 116024, China ) , Komarneni, Sridhar (Department of Ecosystem Science and Management and Materials Research Institute, Materials Research Laboratory, The Pennsylvania State University, University Park, PA 16802, USA)
    Materials chemistry and physics v.211 ,pp. 452 - 461 , 2018 , 0254-0584 ,

    초록

    Abstract Ni and Co doped Fe 2 O 3 hollow microspheres of yolk-shell type were designed and synthesized by using resin (RF-COOH) microspheres as hard template and subsequent calcination. Specific morphologies (walnut-like, jingle-bell-like and ball-like) and compositions of Fe 2 O 3 with different amounts of Ni and Co doping were obtained by tuning metal precursor concentration to optimize their performance in lithium-ion battery application. When Ni and Co doped Fe 2 O 3 hollow microspheres were used as anode materials for lithium-ion batteries, jingle-bell-like and ball-like morphologies showed better electrochemical performance with specific capacities of 415.7 and 414.1 mA h/g, respectively up to 200 cycles due to their stable construction with hollow cavity, porous shell and Ni and Co dopants. However, the specific capacity of Ni and Co doped Fe 2 O 3 @TiO 2 hollow microspheres increased to 562 mA h/g. This work showed a new avenue for designing and fabricating yolk-shell hollow structures with specific morphologies and compositions in order to optimize their specific capacity for use in lithium-ion batteries. Highlights Yolk-shell Ni and Co-doped Fe 2 O 3 hollow microspheres are designed and synthesized. Ni and Co-doped walnut-like, jingle-bell-like and ball-like morphology are obtained. Hollow spheres show morphology-dependent performance in Lithium-ion batteries.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지
  10. [해외논문]   Silver related emitting defects and aging ZnO nanocrystals  

    Torchynska, T.V. (Instituto Politécnico Nacional, ESFM, U.P.A.L.M., México City, 07738, Mexico ) , El Filali, B. (Instituto Politécnico Nacional, UPIITA, Av. IPN, México City, 07320, Mexico ) , Ballardo Rodriguez, Ch. (Instituto Politécnico Nacional, UPIITA, Av. IPN, México City, 07320, Mexico ) , Polupan, G. (Instituto Politécnico Nacional, ESIME, U.P.A.L.M., México City, 07738, Mexico ) , Shcherbyna, L. (V. Lashkaryov Institute of Semiconductor Physics at NASU, Kyiv, 03028, Ukraine)
    Materials chemistry and physics v.211 ,pp. 462 - 467 , 2018 , 0254-0584 ,

    초록

    Abstract The emission, morphology, structure and chemical composition have been studied in Ag-doped ZnO nanocrystals (NCs) in as-grown state and after aging in ambient air by means of SEM, X-ray diffraction (XRD), photoluminescence (PL) and X-ray photo electronic spectroscopy (XPS) methods. PL spectra of as-grown Ag-doped ZnO NCs include a set of elementary PL bands: near band edge (NBE) emission, green and orange PL bands, as well as Ag related PL bands with the peaks at 2.68 and 2.89 eV. The PL intensity of Ag- related PL bands falls down at aging. Simultaneously, the PL intensity of orange PL band increases. Joint XRD analysis and PL study permit identifying the optical transition connected with the substitutional Ag Zn defects. At XPS research the variation of Ag Zn state and the formation of Ag oxide at aging has been revealed. The radiative defect transformations at aging have been analyzed and discussed. Highlights Emission and crystal structure of ZnO NCs with different Ag contents are studied. New Ag Zn related PL bands peaked at 2.68 and 2.89 eV have been detected. The variation of PL spectra at aging ZnO:Ag NCs in ambient air has been revealed. The formation of Ag oxide inclusions in ZnO:Ag NCs at aging has been detected.

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

    이미지

    Fig. 1 이미지

논문관련 이미지