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Xie C, Yang Y, Li K, Cao X, Chen S, Zhao Y. A Broadband Photodetector Based on Non-Layered MnS/WSe 2 Type-I Heterojunctions with Ultrahigh Photoresponsivity and Fast Photoresponse. MATERIALS (BASEL, SWITZERLAND) 2024; 17:1590. [PMID: 38612104 PMCID: PMC11012445 DOI: 10.3390/ma17071590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 03/27/2024] [Accepted: 03/28/2024] [Indexed: 04/14/2024]
Abstract
The separation of photogenerated electron-hole pairs is crucial for the construction of high-performance and wide-band responsive photodetectors. The type-I heterojunction as a photodetector is seldomly studied due to its limited separation of the carriers and narrow optical response. In this work, we demonstrated that the high performance of type-I heterojunction as a broadband photodetector can be obtained by rational design of the band alignment and proper modulation from external electric field. The heterojunction device is fabricated by vertical stacking of non-layered MnS and WSe2 flakes. Its type-I band structure is confirmed by the first-principles calculations. The MnS/WSe2 heterojunction presents a wide optical detecting range spanning from 365 nm to 1550 nm. It exhibits the characteristics of bidirectional transportation, a current on/off ratio over 103, and an excellent photoresponsivity of 108 A W-1 in the visible range. Furthermore, the response time of the device is 19 ms (rise time) and 10 ms (fall time), which is much faster than that of its constituents MnS and WSe2. The facilitation of carrier accumulation caused by the interfacial band bending is thought to be critical to the photoresponse performance of the heterojunction. In addition, the device can operate in self-powered mode, indicating a photovoltaic effect.
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Affiliation(s)
| | | | | | | | - Shanshan Chen
- Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China; (C.X.); (Y.Y.); (K.L.); (X.C.)
| | - Yu Zhao
- Guangdong Provincial Key Laboratory of Information Photonics Technology, Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Material and Energy, Guangdong University of Technology, Guangzhou 510006, China; (C.X.); (Y.Y.); (K.L.); (X.C.)
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2
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Zhang Y, He S, Zhang Q, Zhang H, Zhou J, Yang X, Wei Q, Chen L. Pre-phase transition of a Cu 2-xS template enables polymorph selective synthesis of MS (M = Zn, Cd, Mn) nanocrystals via cation exchange reactions. NANOSCALE 2024; 16:1260-1271. [PMID: 38126257 DOI: 10.1039/d3nr05253b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
Utilization of copper-deficient Cu2-xS nanocrystals (NCs) with diverse crystal phases and stoichiometries as cation exchange (CE) templates is a potential route to overcome the current limitations in the polymorph selective synthesis of desired nanomaterials. Among the Cu2-xS NCs, covellite CuS is emerging as an attractive CE template to produce complicated and metastable metal sulfide NCs. The presence of a reducing agent is essential to induce a phase transition of CuS into other Cu2-xS phases prior to the CE reactions. Nevertheless, the effect of the reducing agent on the phase transition of CuS, especially into the hexagonal close packing (hcp) phase and the cubic close packing (ccp) phase, has been scarcely exploited, but it is highly important for the polymorphic production of metal sulfides with the wurtzite phase and zinc blende phase. Herein, we report a reducing agent dependent pre-phase transition of CuS nanodisks (NDs) into hcp and ccp Cu2-xS NCs. 1-Dodecanethiol molecules and oleylamine molecules selectively reduced CuS NDs into hcp djurleite Cu1.94S NDs and ccp digenite Cu1.8S NCs. Afterward, the hcp Cu1.94S NDs and ccp Cu1.8S NCs were exchanged by Zn2+/Cd2+/Mn2+, and the wurtzite phase and the zinc blende phase of ZnS, CdS, and MnS NCs were produced. Without the pre-phase transition, direct CE reactions of CuS NDs are incapable of synthesizing the above wurtzite and zinc blende metal sulfide NCs. Therefore, our findings suggest the importance of the pre-phase transition of the CE template in polymorphic syntheses, holding great promise in the fabrication of other polymorphic nanomaterials with novel physical and chemical properties.
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Affiliation(s)
- Yan Zhang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
- School of Naval Architecture and Maritime, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China
| | - Shaobo He
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
| | - Qingxia Zhang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
| | - Hongtao Zhang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
| | - Jinchen Zhou
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
| | - Xing Yang
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
| | - Qinhong Wei
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
| | - Lihui Chen
- School of Petrochemical Engineering & Environment, Zhejiang Ocean University, No.1, Haida South Road, Lincheng Changzhi Island, Zhoushan 316022, China.
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhoushan 316022, China
- National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhoushan 316022, China
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3
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Gendler D, Bi J, Mekan D, Warokomski A, Armstrong C, Hernandez-Pagan EA. Halide-driven polymorph selectivity in the synthesis of MnX (X = S, Se) nanoparticles. NANOSCALE 2023; 15:2650-2658. [PMID: 36722489 DOI: 10.1039/d2nr05854e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Devising synthetic strategies to control crystal structure is of great importance as materials properties are governed by structure. MnS is a great model system as it has three known stable polymorphs. Herein, we show the selective synthesis of colloidal wurtzite- and rock-salt-type MnS under identical reactions conditions changing only the manganese halide precursor. Mixtures of Mn halides or halide surrogate (e.g., NH4Cl) also enabled polymorph control. Powder X-ray diffraction aliquot studies of the reactions revealed the crystal structure at the onset of nucleation and that of the final product is the same, unlike the Ostwald ripening transformation observed in other systems. The halide-driven selectivity was also observed in the synthesis of manganese selenide nanoparticles. In this system, variation of the Mn halide precursor allowed access to the wurtzite- and rock salt-type polymorphs of MnSe, as well as the pyrite-MnSe2 phase. Based on this work, the mixing of metal salts might be a simple and effective strategy towards polymorph control and access materials with new crystal structures.
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Affiliation(s)
- Danielle Gendler
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.
| | - Jiaying Bi
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.
| | - Deep Mekan
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.
| | - Ashley Warokomski
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.
| | - Cameron Armstrong
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.
| | - Emil A Hernandez-Pagan
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.
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4
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Sarker JC, Hogarth G. Dithiocarbamate Complexes as Single Source Precursors to Nanoscale Binary, Ternary and Quaternary Metal Sulfides. Chem Rev 2021; 121:6057-6123. [PMID: 33847480 DOI: 10.1021/acs.chemrev.0c01183] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Nanodimensional metal sulfides are a developing class of low-cost materials with potential applications in areas as wide-ranging as energy storage, electrocatalysis, and imaging. An attractive synthetic strategy, which allows careful control over stoichiometry, is the single source precursor (SSP) approach in which well-defined molecular species containing preformed metal-sulfur bonds are heated to decomposition, either in the vapor or solution phase, resulting in facile loss of organics and formation of nanodimensional metal sulfides. By careful control of the precursor, the decomposition environment and addition of surfactants, this approach affords a range of nanocrystalline materials from a library of precursors. Dithiocarbamates (DTCs) are monoanionic chelating ligands that have been known for over a century and find applications in agriculture, medicine, and materials science. They are easily prepared from nontoxic secondary and primary amines and form stable complexes with all elements. Since pioneering work in the late 1980s, the use of DTC complexes as SSPs to a wide range of binary, ternary, and multinary sulfides has been extensively documented. This review maps these developments, from the formation of thin films, often comprised of embedded nanocrystals, to quantum dots coated with organic ligands or shelled by other metal sulfides that show high photoluminescence quantum yields, and a range of other nanomaterials in which both the phase and morphology of the nanocrystals can be engineered, allowing fine-tuning of technologically important physical properties, thus opening up a myriad of potential applications.
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Affiliation(s)
- Jagodish C Sarker
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K.,Department of Chemistry, Jagannath University, Dhaka-1100, Bangladesh
| | - Graeme Hogarth
- Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K
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5
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Dehnel J, Barak Y, Meir I, Budniak AK, Nagvenkar AP, Gamelin DR, Lifshitz E. Insight into the Spin Properties in Undoped and Mn-Doped CdSe/CdS-Seeded Nanorods by Optically Detected Magnetic Resonance. ACS NANO 2020; 14:13478-13490. [PMID: 32935976 DOI: 10.1021/acsnano.0c05454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Controlling the spin degrees of freedom of photogenerated species in semiconductor nanostructures via magnetic doping is an emerging scientific field that may play an important role in the development of new spin-based technologies. The current work explores spin properties in colloidal CdSe/CdS:Mn seeded-nanorod structures doped with a dilute concentration of Mn2+ ions across the rods. The spin properties were determined using continuous-wave optically detected magnetic resonance (ODMR) spectroscopy recorded under variable microwave chopping frequencies. These experiments enabled the deconvolution of a few different radiative recombination processes: band-to-band, trap-to-band, and trap-to-trap emission. The results uncovered the major role of carrier trapping on the spin properties of elongated structures. The magnetic parameters, determined through spin-Hamiltonian simulation of the steady-state ODMR spectra, reflect anisotropy associated with carrier trapping at the seed/rod interface. These observations unveiled changes in the carriers' g-factors and spin-exchange coupling constants as well as extension of radiative and spin-lattice relaxation times due to magnetic coupling between interface carriers and neighboring Mn2+ ions. Overall, this work highlights that the spin degrees of freedom in seeded nanorods are governed by interfacial trapping and can be further manipulated by magnetic doping. These results provide insights into anisotropic nanostructure spin properties relevant to future spin-based technologies.
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Affiliation(s)
- Joanna Dehnel
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Yahel Barak
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Itay Meir
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Adam K Budniak
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Anjani P Nagvenkar
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Daniel R Gamelin
- Department of Chemistry and the Molecular Engineering Materials Center, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
| | - Efrat Lifshitz
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
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6
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Liu Z, Zhu J, Wei P, Zhu W, Zhao W, Xia A, Xu D, Lei Y, Yu J. Candidate for Magnetic Doping Agent and High-Temperature Thermoelectric Performance Enhancer: Hard Magnetic M-type BaFe 12O 19 Nanometer Suspension. ACS APPLIED MATERIALS & INTERFACES 2019; 11:45875-45884. [PMID: 31738501 DOI: 10.1021/acsami.9b16309] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
How to prevent the agglomeration of nanoparticles in nanocomposites remains a key challenge. Using nanometer suspension as a doping agent provides an effective approach to solve this challenge. A new technique that consists of chemical coprecipitation, ball milling and sedimentation separation metheds was developed for preparing hard magnetic M-type BaFe12O19 nanometer suspension. The single-phase BaFe12O19 nanoparticles dispersed uniformly in alcohol have been prepared by this new technique. Magnetic nanocomposite thermoelectric materials with a homogeneous dispersion of BaFe12O19 nanoparticles were prepared through a combination process of an ultrasonic mixing of BaFe12O19 nanometer suspension and In-filled CoSb3 thermoelectric matrix material and spark plasma sintering. The microstructure analysis of magnetic nanocomposite thermoelectric materials confirmed that using the nanometer suspension as a doping agent is an effective way to solve the agglomeration phenomenon of nanoparticles in nanocomposites. In addition, the decline of thermoelectric performance in the high-temperature intrinsic excitation region of In-filled CoSb3 can be effectively suppressed by the magnetic phase transition of BaFe12O19 nanoparticles dried by nanometer suspension from ferromagnetism to paramagnetism. It is also confirmed that using the BaFe12O19 nanometer suspension as a thermoelectric performance enhancer is an effective way to solve the challenging problem of performance deterioration of thermoelectric materials at high temperature.
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Affiliation(s)
| | | | - Ping Wei
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan 430070 , China
| | - Wanting Zhu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan 430070 , China
| | - Wenyu Zhao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Wuhan 430070 , China
| | | | | | | | - Jian Yu
- Jiangxi Province Engineering Research Center of Materials Surface Enhancing and Remanufacturing, School of Mechanical and Materials Engineering , Jiujiang University , Jiujiang 332005 , China
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7
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Li N, Zhang Y, Cheng R, Wang J, Li J, Wang Z, Sendeku MG, Huang W, Yao Y, Wen Y, He J. Synthesis and Optoelectronic Applications of a Stable p-Type 2D Material: α-MnS. ACS NANO 2019; 13:12662-12670. [PMID: 31424906 DOI: 10.1021/acsnano.9b04205] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
α-MnS, as a nonlayered p-type material with a wide band gap of 2.7 eV, has been expected to supplement the scarcity of two-dimensional (2D) p-type semiconductors, which are desperately required for constructing atomically thin p-n junctions. However, the preparation and property investigation of 2D α-MnS has scarcely been reported so far. Herein, we report the controlled synthesis of ultrathin large-scale α-MnS single crystals down to 4.78 nm via a facile chemical vapor deposition (CVD) method. Importantly, top-gating field-effect transistors based on the as-synthesized α-MnS nanosheets show p-type transport behavior with an ultrahigh on/off ratio exceeding 106, surpassing most reported p-type 2D materials. Meanwhile, α-MnS phototransistors exhibit an ultrahigh detectivity of 3.2 × 1014 Jones, as well as an excellent photoresponsivity of 139 A/W and a fast response time of 12 ms. Besides, outstanding environmental stability and admirable flexibility have also been demonstrated in the as-synthesized α-MnS nanosheets. We believe that this work broadens the scope of the CVD synthesis strategy for various p-type 2D materials and demonstrates their significant application potentials in electronics and optoelectronics.
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Affiliation(s)
- Ningning Li
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- Sino-Danish College , University of Chinese Academy of Sciences , Beijing , 100049 , P. R. China
- Sino-Danish Center for Education and Research , Beijing , 100049 , P. R. China
| | - Yu Zhang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- School of Physics and Technology , Wuhan University , Wuhan , 430072 , P. R. China
| | - Ruiqing Cheng
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Junjun Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Jie Li
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Zhenxing Wang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Marshet Getaye Sendeku
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Wenhao Huang
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Yuyu Yao
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- Sino-Danish College , University of Chinese Academy of Sciences , Beijing , 100049 , P. R. China
- Sino-Danish Center for Education and Research , Beijing , 100049 , P. R. China
| | - Yao Wen
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
| | - Jun He
- CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology , Beijing 100190 , P. R. China
- School of Physics and Technology , Wuhan University , Wuhan , 430072 , P. R. China
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8
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Strassberg R, Delikanli S, Barak Y, Dehnel J, Kostadinov A, Maikov G, Hernandez-Martinez PL, Sharma M, Demir HV, Lifshitz E. Persuasive Evidence for Electron-Nuclear Coupling in Diluted Magnetic Colloidal Nanoplatelets Using Optically Detected Magnetic Resonance Spectroscopy. J Phys Chem Lett 2019; 10:4437-4447. [PMID: 31314537 DOI: 10.1021/acs.jpclett.9b01999] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The incorporation of magnetic impurities into semiconductor nanocrystals with size confinement promotes enhanced spin exchange interaction between photogenerated carriers and the guest spins. This interaction stimulates new magneto-optical properties with significant advantages for emerging spin-based technologies. Here we observe and elaborate on carrier-guest interactions in magnetically doped colloidal nanoplatelets with the chemical formula CdSe/Cd1-xMnxS, explored by optically detected magnetic resonance and magneto-photoluminescence spectroscopy. The host matrix, with a quasi-type II electronic configuration, introduces a dominant interaction between a photogenerated electron and a magnetic dopant. Furthermore, the data convincingly presents the interaction between an electron and nuclear spins of the doped ions located at neighboring surroundings, with consequent influence on the carrier's spin relaxation time. The nuclear spin contribution by the magnetic dopants in colloidal nanoplatelets is considered here for the first time.
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Affiliation(s)
- Rotem Strassberg
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute , Technion-Israel Institute of Technology , Haifa 32000 , Israel
| | - Savas Delikanli
- Luminous Center of Excellence for Semiconductor Lighting and Displays, TPI, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, School of Materials Science and Engineering , Nanyang Technological University-NTU Singapore , 639798 Singapore
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
| | - Yahel Barak
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute , Technion-Israel Institute of Technology , Haifa 32000 , Israel
| | - Joanna Dehnel
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute , Technion-Israel Institute of Technology , Haifa 32000 , Israel
| | - Alyssa Kostadinov
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute , Technion-Israel Institute of Technology , Haifa 32000 , Israel
| | - Georgy Maikov
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute , Technion-Israel Institute of Technology , Haifa 32000 , Israel
| | - Pedro Ludwig Hernandez-Martinez
- Luminous Center of Excellence for Semiconductor Lighting and Displays, TPI, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, School of Materials Science and Engineering , Nanyang Technological University-NTU Singapore , 639798 Singapore
| | - Manoj Sharma
- Luminous Center of Excellence for Semiconductor Lighting and Displays, TPI, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, School of Materials Science and Engineering , Nanyang Technological University-NTU Singapore , 639798 Singapore
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
| | - Hilmi Volkan Demir
- Luminous Center of Excellence for Semiconductor Lighting and Displays, TPI, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, School of Materials Science and Engineering , Nanyang Technological University-NTU Singapore , 639798 Singapore
- Department of Electrical and Electronics Engineering, Department of Physics, UNAM-Institute of Materials Science and Nanotechnology , Bilkent University , Ankara 06800 , Turkey
| | - Efrat Lifshitz
- Schulich Faculty of Chemistry, Solid State Institute, Russell Berrie Nanotechnology Institute , Technion-Israel Institute of Technology , Haifa 32000 , Israel
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9
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Shao X, Zhang T, Li B, Zhou M, Ma X, Wang J, Jiang S. Enhanced photothermal behavior derived from controllable self-assembly of Cu 1.94S microstructures. Dalton Trans 2019; 48:4495-4503. [PMID: 30806392 DOI: 10.1039/c8dt04856h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
New ordered architectures or morphologies could be obtained through the self-assembly process and usually generate new physical and chemical properties. Here we report an adjustable self-assembly research study on copper sulphide nanocrystals (Cu1.94S NCs) forming five kinds of plant-like morphologies. Hydrophobic Cu1.94S quantum dots were prepared in the CHCl3 phase and transferred to the aqueous phase and capped with cysteine or penicillamine through a ligand exchange technique. Afterwards, a facile and eco-friendly self-assembly process (without using any template or surfactant) was employed. Through regulating the conditions including the solvent composition, surface ligand and starting concentration of Cu1.94S NCs, five delicate architectures were obtained. In addition, the possible formation process and growth mechanism of the obtained three-dimensional (3D) Cu1.94S architectures was also proposed and discussed. The assembled Cu1.94S architectures show improved molar extinction coefficients compared with individual Cu1.94S NCs, and in this way, better photothermal performance is achieved.
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Affiliation(s)
- Xiao Shao
- Tianjin Key Laboratory of Applied Catalysis Science and Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300354, China.
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10
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Li XH, Chen WL, Wei M, Liu J, Di Y, Liu L, Li YG, Wang EB. Polyoxometalates nanoparticles improve anti-tumor activity by maximal cellular uptake. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.046] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Hennous M, Ramana EV, Tobaldi DM, Costa BFO, Valente MA, Labrincha J, Karmaoui M. Synthesis, structure and magnetic properties of multipod-shaped cobalt ferrite nanocrystals. NEW J CHEM 2019. [DOI: 10.1039/c9nj02237f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A non-aqueous sol–gel route followed by oriented attachment to make multi-pod CoFe2O4 nanocrystals showing large room temperature saturation magnetization.
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Affiliation(s)
- Mohammed Hennous
- Laboratoire de Physico-Chimie des Matériaux
- Catalyse et Environnement Département de Génie Chimique
- Faculté de Chimie
- Université des Sciences et de la Technologie d'Oran – Mohamed Boudiaf
- Oran 31000
| | - E. Venkata Ramana
- I3N-Aveiro
- Department of Physics
- University of Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
| | - David M. Tobaldi
- Department of Materials and Ceramic Engineering/CICECO – Aveiro Institute of Materials
- University of Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
- Portugal
| | | | - M. A. Valente
- I3N-Aveiro
- Department of Physics
- University of Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
| | - Joao Labrincha
- Department of Materials and Ceramic Engineering/CICECO – Aveiro Institute of Materials
- University of Aveiro
- Campus Universitário de Santiago
- 3810-193 Aveiro
- Portugal
| | - Mohamed Karmaoui
- Laboratoire de Physico-Chimie des Matériaux
- Catalyse et Environnement Département de Génie Chimique
- Faculté de Chimie
- Université des Sciences et de la Technologie d'Oran – Mohamed Boudiaf
- Oran 31000
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12
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Strasser P, Gliech M, Kuehl S, Moeller T. Electrochemical processes on solid shaped nanoparticles with defined facets. Chem Soc Rev 2018; 47:715-735. [PMID: 29354840 DOI: 10.1039/c7cs00759k] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This 2007 Chemistry Nobel prize update covers scientific advances of the past decade in our understanding of electrocatalytic processes on surfaces of nanoscale shape-controlled polyhedral solids. It is argued that the field of chemical reaction processes on solid surfaces has recently been paying increasing attention to the fundamental understanding of electrified solid-liquid interfaces and toward the operando study of the minute fraction of catalytically active, structurally dynamic non-equilibrium Taylor-type surface sites. Meanwhile, despite mounting evidence of acting as structural proxies in some cases, the concept of catalytic structure sensitivity of well-defined nanoscale solid surfaces continues to be a key organizing principle for the science of shape-controlled nanocrystals and, hence, constitutes a central recurring theme in this review. After addressing key aspects and recent progress in the wet-chemical synthesis of shaped nanocatalysts, three areas of electrocatalytic processes on solid shape-controlled nanocrystals of current scientific priority are discussed in more detail: the oxygen electroreduction on shape-controlled Pt-Ni polyhedra with its technological relevance for low temperature fuel cells, the CO2 electroreduction to hydrocarbons on Cu polyhedra and the puzzling interplay between chemical and structural effects, and the electrocatalytic oxygen evolution reaction from water on shaped transition metal oxides. The review closes with the conclusion that Surface Science and thermal catalysis, honored by Ertl's Nobel prize a decade ago, continue to show major repercussions on the emerging field of Interface Science.
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Affiliation(s)
- Peter Strasser
- The Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Chemical Engineering Division, Technical University Berlin, 10623 Berlin, Germany.
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13
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Cao X, Li H, He J, Kang L, Jiang R, Shi F, Xu H, Lei Z, Liu ZH. Preparation and formation process of α-MnS@MoS2 microcubes with hierarchical core/shell structure. J Colloid Interface Sci 2017; 507:18-26. [DOI: 10.1016/j.jcis.2017.07.102] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 07/23/2017] [Accepted: 07/28/2017] [Indexed: 10/19/2022]
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14
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Fan J, Menéndez E, Guerrero M, Quintana A, Weschke E, Pellicer E, Sort J. Unraveling the Origin of Magnetism in Mesoporous Cu-Doped SnO₂ Magnetic Semiconductors. NANOMATERIALS 2017; 7:nano7110348. [PMID: 29068367 PMCID: PMC5707565 DOI: 10.3390/nano7110348] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 10/11/2017] [Accepted: 10/20/2017] [Indexed: 11/22/2022]
Abstract
The origin of magnetism in wide-gap semiconductors doped with non-ferromagnetic 3d transition metals still remains intriguing. In this article, insights in the magnetic properties of ordered mesoporous Cu-doped SnO2 powders, prepared by hard-templating, have been unraveled. Whereas, both oxygen vacancies and Fe-based impurity phases could be a plausible explanation for the observed room temperature ferromagnetism, the low temperature magnetism is mainly and unambiguously arising from the nanoscale nature of the formed antiferromagnetic CuO, which results in a net magnetization that is reminiscent of ferromagnetic behavior. This is ascribed to uncompensated spins and shape-mediated spin canting effects. The reduced blocking temperature, which resides between 30 and 5 K, and traces of vertical shifts in the hysteresis loops confirm size effects in CuO. The mesoporous nature of the system with a large surface-to-volume ratio likely promotes the occurrence of uncompensated spins, spin canting, and spin frustration, offering new prospects in the use of magnetic semiconductors for energy-efficient spintronics.
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Affiliation(s)
- Junpeng Fan
- Departament de Física, UniversitatAutònoma de Barcelona, E-08193 Cerdanyola del Vallès, Spain.
| | - Enric Menéndez
- Departament de Física, UniversitatAutònoma de Barcelona, E-08193 Cerdanyola del Vallès, Spain.
| | - Miguel Guerrero
- Departament de Física, UniversitatAutònoma de Barcelona, E-08193 Cerdanyola del Vallès, Spain.
| | - Alberto Quintana
- Departament de Física, UniversitatAutònoma de Barcelona, E-08193 Cerdanyola del Vallès, Spain.
| | - Eugen Weschke
- Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Straße 15, 12489 Berlin, Germany.
| | - Eva Pellicer
- Departament de Física, UniversitatAutònoma de Barcelona, E-08193 Cerdanyola del Vallès, Spain.
| | - Jordi Sort
- Departament de Física, UniversitatAutònoma de Barcelona, E-08193 Cerdanyola del Vallès, Spain.
- Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluís Companys 23, 08010 Barcelona, Spain.
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15
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Surface design of magnetic nanoparticles for stimuli-responsive cancer imaging and therapy. Biomaterials 2017; 136:98-114. [DOI: 10.1016/j.biomaterials.2017.05.013] [Citation(s) in RCA: 210] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 05/02/2017] [Accepted: 05/07/2017] [Indexed: 12/29/2022]
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16
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Zhang L, You S, Zuo M, Yang Q. Solution Synthesis of Nonequilibrium Zincblende MnS Nanowires. Inorg Chem 2017; 56:7679-7686. [PMID: 28661688 DOI: 10.1021/acs.inorgchem.7b00247] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Uniform four-coordinate nonequilibrium MnS nanowires mainly in zincblende structure, other than the stable rock-salt phase, are reported for the first time. The MnS nanowires are grown via a solution-solid-solid model from the reaction of a Mn(II) source with dibenzyl disulfide in oleylamine at 180-200 °C catalyzed by Ag2S nanocrystals in a body-centered cubic (bcc) fast-ionic phase transformed from their low-temperature monoclinic form. Investigations show that most of the zincblende MnS nanowires are grown along the ⟨112⟩ zone axis but a small proportion grow along the ⟨111⟩ZB/⟨0001⟩Wur axis with zincblende/defect-section and/or wurtzite/defect-section superlattices connected with the stems along the ⟨112⟩ direction. The nanowires have a tendency to grow straight at relatively low reaction temperature for short reaction times but twist at high temperature for long reaction times. Meanwhile, relatively high temperatures and long times favor the transition of the MnS nanowires in the zincblende phase to the corresponding thermodynamic ones in rock-salt form. Interestingly, even small increases in reaction pressure (1-2 atm) sensitively influence the growth of the MnS nanowires from zincblende to wurtzite form in the present catalytic system although low-pressure changes commonly do not have an obvious effect on condensed matter. In addition, the optical and magnetic properties of the zincblende MnS nanowires were studied, and they are varied largely from the bulk.
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Affiliation(s)
- Li Zhang
- Hefei National Laboratory of Physical Sciences at the Microscale (HFNL), ‡Department of Chemistry, §Laboratory of Nanomaterials for Energy Conversion (LNEC), ∥Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei 230026, Anhui, People's Republic of China
| | - Su You
- Hefei National Laboratory of Physical Sciences at the Microscale (HFNL), ‡Department of Chemistry, §Laboratory of Nanomaterials for Energy Conversion (LNEC), ∥Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei 230026, Anhui, People's Republic of China
| | - Ming Zuo
- Hefei National Laboratory of Physical Sciences at the Microscale (HFNL), ‡Department of Chemistry, §Laboratory of Nanomaterials for Energy Conversion (LNEC), ∥Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei 230026, Anhui, People's Republic of China
| | - Qing Yang
- Hefei National Laboratory of Physical Sciences at the Microscale (HFNL), ‡Department of Chemistry, §Laboratory of Nanomaterials for Energy Conversion (LNEC), ∥Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China , Hefei 230026, Anhui, People's Republic of China
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17
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Arunchander A, Peera SG, Sahu AK. Self-Assembled Manganese Sulfide Nanostructures on Graphene as an Oxygen Reduction Catalyst for Anion Exchange Membrane Fuel Cells. ChemElectroChem 2017. [DOI: 10.1002/celc.201700160] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Asokan Arunchander
- CSIR-Central Electrochemical Research Institute-Madras Unit; CSIR Madras Complex; Taramani, Chennai 600 113 India
| | - Shaik Gouse Peera
- CSIR-Central Electrochemical Research Institute-Madras Unit; CSIR Madras Complex; Taramani, Chennai 600 113 India
| | - Akhila Kumar Sahu
- CSIR-Central Electrochemical Research Institute-Madras Unit; CSIR Madras Complex; Taramani, Chennai 600 113 India
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18
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Zhang G, Kong M, Yao Y, Long L, Yan M, Liao X, Yin G, Huang Z, Asiri AM, Sun X. One-pot synthesis of γ-MnS/reduced graphene oxide with enhanced performance for aqueous asymmetric supercapacitors. NANOTECHNOLOGY 2017; 28:065402. [PMID: 28050971 DOI: 10.1088/1361-6528/aa52a5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this work, γ-MnS/reduced graphene oxide composites (γ-MnS/rGO) were prepared using a facile one-pot hydrothermal method. As an electrode material for supercapacitors, the γ-MnS/rGO-60 composite obtained under dosages of graphene oxide was 60 mg and exhibited an enhanced specific capacitance of 547.6 F g-1 at a current density of 1 A g-1, and outstanding rate capability (65% capacitance retention at 20 A g-1), with superior cycling stability and electrochemical reversibility. An asymmetric supercapacitor assembled from γ-MnS/rGO-60 composite and rGO (γ-MnS/rGO-60//rGO) showed a voltage window of 0-1.6 V and delivered a high energy density of 23.1 W h kg-1 at a power density of 798.8 W kg-1, and 15.9 W h kg-1 at 4.5 kW kg-1. Moreover, two such 1.0 × 1.0 cm2 devices connected together in series easily light up a group of LED lights, showing its potential practical application as an attractive energy storage device.
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Affiliation(s)
- Guanggao Zhang
- College of Materials Science and Engineering, Sichuan University, Chengdu 610065, Sichuan, People's Republic of China
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19
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20
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Reiss P, Carrière M, Lincheneau C, Vaure L, Tamang S. Synthesis of Semiconductor Nanocrystals, Focusing on Nontoxic and Earth-Abundant Materials. Chem Rev 2016; 116:10731-819. [DOI: 10.1021/acs.chemrev.6b00116] [Citation(s) in RCA: 382] [Impact Index Per Article: 47.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Peter Reiss
- Université Grenoble Alpes, INAC-SyMMES, F-38054 Grenoble Cedex 9, France
- CEA, INAC-SyMMES-STEP/LEMOH, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
- CNRS, SPrAM, F-38054 Grenoble Cedex 9, France
| | - Marie Carrière
- Université Grenoble Alpes, INAC-SyMMES, F-38054 Grenoble Cedex 9, France
- CEA, INAC-SyMMES-CIBEST/LAN, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
| | - Christophe Lincheneau
- Université Grenoble Alpes, INAC-SyMMES, F-38054 Grenoble Cedex 9, France
- CEA, INAC-SyMMES-STEP/LEMOH, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
- CNRS, SPrAM, F-38054 Grenoble Cedex 9, France
| | - Louis Vaure
- Université Grenoble Alpes, INAC-SyMMES, F-38054 Grenoble Cedex 9, France
- CEA, INAC-SyMMES-STEP/LEMOH, 17 rue des Martyrs, F-38054 Grenoble Cedex 9, France
- CNRS, SPrAM, F-38054 Grenoble Cedex 9, France
| | - Sudarsan Tamang
- Department
of Chemistry, Sikkim University, Sikkim 737102, India
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21
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Gentile A, Ruffino F, Grimaldi MG. Complex-Morphology Metal-Based Nanostructures: Fabrication, Characterization, and Applications. NANOMATERIALS 2016; 6:nano6060110. [PMID: 28335236 PMCID: PMC5302633 DOI: 10.3390/nano6060110] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 05/18/2016] [Accepted: 05/21/2016] [Indexed: 11/16/2022]
Abstract
Due to their peculiar qualities, metal-based nanostructures have been extensively used in applications such as catalysis, electronics, photography, and information storage, among others. New applications for metals in areas such as photonics, sensing, imaging, and medicine are also being developed. Significantly, most of these applications require the use of metals in the form of nanostructures with specific controlled properties. The properties of nanoscale metals are determined by a set of physical parameters that include size, shape, composition, and structure. In recent years, many research fields have focused on the synthesis of nanoscale-sized metallic materials with complex shape and composition in order to optimize the optical and electrical response of devices containing metallic nanostructures. The present paper aims to overview the most recent results—in terms of fabrication methodologies, characterization of the physico-chemical properties and applications—of complex-morphology metal-based nanostructures. The paper strongly focuses on the correlation between the complex morphology and the structures’ properties, showing how the morphological complexity (and its nanoscale control) can often give access to a wide range of innovative properties exploitable for innovative functional device production. We begin with an overview of the basic concepts on the correlation between structural and optical parameters of nanoscale metallic materials with complex shape and composition, and the possible solutions offered by nanotechnology in a large range of applications (catalysis, electronics, photonics, sensing). The aim is to assess the state of the art, and then show the innovative contributions that can be proposed in this research field. We subsequently report on innovative, versatile and low-cost synthesis techniques, suitable for providing a good control on the size, surface density, composition and geometry of the metallic nanostructures. The main purpose of this study is the fabrication of functional nanoscale-sized materials, whose properties can be tailored (in a wide range) simply by controlling the structural characteristics. The modulation of the structural parameters is required to tune the plasmonic properties of the nanostructures for applications such as biosensors, opto-electronic or photovoltaic devices and surface-enhanced Raman scattering (SERS) substrates. The structural characterization of the obtained nanoscale materials is employed in order to define how the synthesis parameters affect the structural characteristics of the resulting metallic nanostructures. Then, macroscopic measurements are used to probe their electrical and optical properties. Phenomenological growth models are drafted to explain the processes involved in the growth and evolution of such composite systems. After the synthesis and characterization of the metallic nanostructures, we study the effects of the incorporation of the complex morphologies on the optical and electrical responses of each specific device.
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Affiliation(s)
- Antonella Gentile
- Department of Physics and Astronomy-University of Catania, via S. Sofia 64, 95123 Catania, Italy.
- MATIS IMM-CNR, via S. Sofia 64, 95123 Catania, Italy.
| | - Francesco Ruffino
- Department of Physics and Astronomy-University of Catania, via S. Sofia 64, 95123 Catania, Italy.
- MATIS IMM-CNR, via S. Sofia 64, 95123 Catania, Italy.
| | - Maria Grazia Grimaldi
- Department of Physics and Astronomy-University of Catania, via S. Sofia 64, 95123 Catania, Italy.
- MATIS IMM-CNR, via S. Sofia 64, 95123 Catania, Italy.
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22
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Fan J, Zhang J, Solsona P, Suriñach S, Baró MD, Sort J, Pellicer E. Nanocasting synthesis of mesoporous SnO2 with a tunable ferromagnetic response through Ni loading. RSC Adv 2016. [DOI: 10.1039/c6ra23918h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ni-doped SnO2 mesoporous powders exhibit ferromagnetism at low and room temperatures, which can be tuned by adjusting the Ni loading.
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Affiliation(s)
- Junpeng Fan
- Departament de Física
- Facultat de Ciències
- Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Jin Zhang
- Departament de Física
- Facultat de Ciències
- Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Pau Solsona
- Departament de Física
- Facultat de Ciències
- Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Santiago Suriñach
- Departament de Física
- Facultat de Ciències
- Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Maria Dolors Baró
- Departament de Física
- Facultat de Ciències
- Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Jordi Sort
- Departament de Física
- Facultat de Ciències
- Universitat Autònoma de Barcelona
- Barcelona
- Spain
| | - Eva Pellicer
- Departament de Física
- Facultat de Ciències
- Universitat Autònoma de Barcelona
- Barcelona
- Spain
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23
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Kolesnikov IE, Povolotskiy AV, Mamonova DV, Lähderanta E, Manshina AA, Mikhailov MD. Photoluminescence properties of Eu3+ ions in yttrium oxide nanoparticles: defect vs. normal sites. RSC Adv 2016. [DOI: 10.1039/c6ra16814k] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The position of activator ions in the lattice has a fundamental effect on the luminescent properties of phosphors.
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Affiliation(s)
- I. E. Kolesnikov
- Saint Petersburg State University
- Saint Petersburg
- Russia
- Lappeenranta University of Technology LUT
- 53850 Lappeenranta
| | | | - D. V. Mamonova
- Saint Petersburg State University
- Saint Petersburg
- Russia
- Scientific and Technological Institute of Optical Material Science
- VNTs S. I. Vavilov State Optical Institute
| | - E. Lähderanta
- Lappeenranta University of Technology LUT
- 53850 Lappeenranta
- Finland
| | | | - M. D. Mikhailov
- Scientific and Technological Institute of Optical Material Science
- VNTs S. I. Vavilov State Optical Institute
- Saint Petersburg
- Russia
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24
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Wang D, Cai D, Qu B, Wang T. Rational combination of α-MnS/rGO nanocomposites for high-performance lithium-ion batteries. CrystEngComm 2016. [DOI: 10.1039/c6ce01045h] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Capetti E, Ferretti AM, Dal Santo V, Ponti A. Surfactant-controlled composition and crystal structure of manganese(II) sulfide nanocrystals prepared by solvothermal synthesis. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2015; 6:2319-2329. [PMID: 26734522 PMCID: PMC4685872 DOI: 10.3762/bjnano.6.238] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 11/18/2015] [Indexed: 06/05/2023]
Abstract
We investigated how the outcome of the solvothermal synthesis of manganese(II) sulfide (MnS) nanocrystals (NCs) is affected by the type and amount of long chain surfactant present in the reaction mixture. Prompted by a previous observation that a larger than stoichiometric amount of sulfur is required [Puglisi, A.; Mondini, S.; Cenedese, S.; Ferretti, A. M.; Santo, N.; Ponti A. Chem. Mater. 2010, 22, 2804-2813], we carried out a wide set of reactions using Mn(II) carboxylates and Mn2(CO)10 as precursors with varying amounts of sulfur and carboxylic acid. MnS NCs were obtained provided that the S/Mn ratio was larger than the L/Mn ratio, otherwise MnO NCs were produced. Since MnS can crystallize in three distinct phases (rock salt α-MnS, zincblende β-MnS, and wurtzite γ-MnS), we also investigated whether the surfactant affected the NC polymorphism. We found that MnS polymorphism can be controlled by appropriate selection of the surfactant. γ-MnS nanocrystals formed when a 1:2 mixture of long chain carboxylic acid and amine was used, irrespective of the presence of carboxylic acid as a free surfactant or ligand in the metal precursor. When we used a single surfactant (carboxylic acid, alcohol, thiol, amine), α-MnS nanocrystals were obtained. The peculiar role of the amine seems to be related to its basicity. The nanocrystals were characterized by TEM and electron diffraction; ATR-FTIR spectroscopy provided information about the surfactants adsorbed on the NCs.
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Affiliation(s)
- Elena Capetti
- Laboratorio di Nanotecnologie, Istituto di Scienze e Tecnologie Molecolari, Consiglio Nazionale delle Ricerche, via G. Fantoli 16/15, 20138 Milano, Italy
| | - Anna M Ferretti
- Laboratorio di Nanotecnologie, Istituto di Scienze e Tecnologie Molecolari, Consiglio Nazionale delle Ricerche, via G. Fantoli 16/15, 20138 Milano, Italy
| | - Vladimiro Dal Santo
- Istituto di Scienze e Tecnologie Molecolari, Consiglio Nazionale delle Ricerche, via C. Golgi 19, 20133 Milano, Italy
| | - Alessandro Ponti
- Laboratorio di Nanotecnologie, Istituto di Scienze e Tecnologie Molecolari, Consiglio Nazionale delle Ricerche, via G. Fantoli 16/15, 20138 Milano, Italy
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26
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Kawashima A, Nakanishi T, Kitagawa Y, Fujita K, Tanaka K, Fushimi K, Malik MA, O’Brien P, Hasegawa Y. Terbium Oxide, Fluoride, and Oxyfluoride Nanoparticles with Magneto-optical Properties. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20150198] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Akira Kawashima
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University
| | - Takayuki Nakanishi
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University
| | - Yuichi Kitagawa
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University
| | - Koji Fujita
- Graduate School of Engineering, Kyoto University
| | | | - Koji Fushimi
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University
| | | | - Paul O’Brien
- School of Chemistry and School of Materials, The University of Manchester
| | - Yasuchika Hasegawa
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University
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27
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Fan D, Zhang J, Wang X, Xu M, Xu S. Three-step process improves crystal quality of Cu 2ZnSnS 4absorber layer and efficiency of solar cell. CRYSTAL RESEARCH AND TECHNOLOGY 2015. [DOI: 10.1002/crat.201500025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Donghua Fan
- School of Applied Physics and Materials, Wuyi University; 22 Dongcheng Village Jiangmen 529020 China
| | - Junzhi Zhang
- School of Applied Physics and Materials, Wuyi University; 22 Dongcheng Village Jiangmen 529020 China
| | - Xianghu Wang
- Shanghai Dianji University; Shanghai 200240 China
| | - Manqin Xu
- School of Applied Physics and Materials, Wuyi University; 22 Dongcheng Village Jiangmen 529020 China
| | - Shuai Xu
- School of Applied Physics and Materials, Wuyi University; 22 Dongcheng Village Jiangmen 529020 China
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28
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Yang X, Fu Z, Liu G, Zhang C, Wei Y, Wu Z, Sheng T. Controlled morphology and EDTA-induced pure green upconversion luminescence of Er3+/Ho3+-Yb3+ co-doped NaCe(MoO4)2 phosphor. RSC Adv 2015. [DOI: 10.1039/c5ra09103a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An innovative route to increase the green UC emission and simultaneously suppress red UC emission in Er3+/Ho3+-Yb3+ co-doped NaCe(MoO4)2.
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Affiliation(s)
- Xingxing Yang
- Key Laboratory of Coherent Light
- Atomic and Molecular Spectroscopy
- Ministry of Education
- College of Physics
- Jilin University
| | - Zuoling Fu
- Key Laboratory of Coherent Light
- Atomic and Molecular Spectroscopy
- Ministry of Education
- College of Physics
- Jilin University
| | - Guofeng Liu
- Key Laboratory of Coherent Light
- Atomic and Molecular Spectroscopy
- Ministry of Education
- College of Physics
- Jilin University
| | - Chunpeng Zhang
- Key Laboratory of Coherent Light
- Atomic and Molecular Spectroscopy
- Ministry of Education
- College of Physics
- Jilin University
| | - Yanling Wei
- School of Applied Sciences
- Jilin Engineering Normal University
- Changchun 130012
- China
| | - Zhijian Wu
- State Key Laboratory of Rare Earth Resources Utilization
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Tianqi Sheng
- Key Laboratory of Coherent Light
- Atomic and Molecular Spectroscopy
- Ministry of Education
- College of Physics
- Jilin University
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29
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Thomas P, Sreekanth P, Philip R, Abraham KE. Morphology dependent nanosecond and ultrafast optical power limiting of CdO nanomorphotypes. RSC Adv 2015. [DOI: 10.1039/c5ra04282h] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Morphology dependent nonlinear optical power limiting of CdO nanomorphotypes.
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Affiliation(s)
- Paulose Thomas
- Department of Physics
- St. Berchmans College
- Changanassery 686 101
- India
| | - P. Sreekanth
- Light and Matter Physics Group
- Raman Research Institute
- Bangalore 560 080
- India
| | - Reji Philip
- Light and Matter Physics Group
- Raman Research Institute
- Bangalore 560 080
- India
| | - K. E. Abraham
- Department of Physics
- St. Berchmans College
- Changanassery 686 101
- India
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30
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Palui G, Aldeek F, Wang W, Mattoussi H. Strategies for interfacing inorganic nanocrystals with biological systems based on polymer-coating. Chem Soc Rev 2015; 44:193-227. [DOI: 10.1039/c4cs00124a] [Citation(s) in RCA: 164] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A representative set of nanocrystals made of semiconductors, Au and iron oxide, surface-capped with polymer ligands presenting various metal-coordinating groups.
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Affiliation(s)
- Goutam Palui
- Florida State University
- Department of Chemistry and Biochemistry
- Tallahassee
- USA
| | - Fadi Aldeek
- Florida State University
- Department of Chemistry and Biochemistry
- Tallahassee
- USA
| | - Wentao Wang
- Florida State University
- Department of Chemistry and Biochemistry
- Tallahassee
- USA
| | - Hedi Mattoussi
- Florida State University
- Department of Chemistry and Biochemistry
- Tallahassee
- USA
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31
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Hasegawa Y, Nakanishi T. Luminescent lanthanide coordination polymers for photonic applications. RSC Adv 2015. [DOI: 10.1039/c4ra09255d] [Citation(s) in RCA: 165] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Luminescent lanthanide coordination polymers composed of lanthanide ions and organic joint ligands exhibit characteristic photophysical and thermostable properties that are different from typical organic dyes, luminescent metal complexes, and semiconductor nanoparticles.
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Affiliation(s)
- Y. Hasegawa
- Faculty of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
| | - T. Nakanishi
- Faculty of Engineering
- Hokkaido University
- Sapporo 060-8628
- Japan
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32
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Tang Y, Chen T, Yu S. Morphology controlled synthesis of monodispersed manganese sulfide nanocrystals and their primary application in supercapacitors with high performances. Chem Commun (Camb) 2015; 51:9018-21. [DOI: 10.1039/c5cc01700a] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Monodispersed hollow spindle-like nanosphere and tetrapod nanorod MnS nanocrystals are obtained via a facile template-free hydrothermal process. The MnS nanocrystals are used as supercapacitor materials and they exhibit high performances.
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Affiliation(s)
- Yongfu Tang
- Hebei Key Laboratory of Applied Chemistry
- College of Environmental and Chemical Engineering
- Yanshan University
- Qinhuangdao
- China
| | - Teng Chen
- Hebei Key Laboratory of Applied Chemistry
- College of Environmental and Chemical Engineering
- Yanshan University
- Qinhuangdao
- China
| | - Shengxue Yu
- Hebei Key Laboratory of Applied Chemistry
- College of Environmental and Chemical Engineering
- Yanshan University
- Qinhuangdao
- China
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33
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Lai H, Du Y, Zhao M, Sun K, Yang L. Controlled synthesis and luminescent properties of DyPO4:Eu nanostructures. RSC Adv 2014. [DOI: 10.1039/c4ra06916a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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34
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Liu X, Wang J, Yue L, Xin B, Chen S, Dai J, Wang R, Wang Y. Biosynthesis of high-purity γ-MnS nanoparticle by newly isolated Clostridiaceae sp. and its properties characterization. Bioprocess Biosyst Eng 2014; 38:219-27. [DOI: 10.1007/s00449-014-1261-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2014] [Accepted: 07/25/2014] [Indexed: 02/08/2023]
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35
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Sarma R, Das Q, Hussain A, Ramteke A, Choudhury A, Mohanta D. Physical and biophysical assessment of highly fluorescent, magnetic quantum dots of a wurtzite-phase manganese selenide system. NANOTECHNOLOGY 2014; 25:275101. [PMID: 24960126 DOI: 10.1088/0957-4484/25/27/275101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Combining fluorescence and magnetic features in a non-iron based, select type of quantum dots (QDs) can have immense value in cellular imaging, tagging and other nano-bio interface applications, including targeted drug delivery. Herein, we report on the colloidal synthesis and physical and biophysical assessment of wurtzite-type manganese selenide (MnSe) QDs in cell culture media. Aiming to provide a suitable colloidal system of biological relevance, different concentrations of reactants and ligands (e.g., thioglycolic acid, TGA) have been considered. The average size of the QDs is ∼7 nm, which exhibited a quantum yield of ∼75% as compared to rhodamine 6 G dye(®). As revealed from time-resolved photoluminescence (TR-PL) response, the near band edge emission followed a bi-exponential decay feature with characteristic times of ∼0.64 ns and 3.04 ns. At room temperature, the QDs were found to exhibit paramagnetic features with coercivity and remanence impelled by TGA concentrations. With BSA as a dispersing agent, the QDs showed an improved optical stability in Dulbecco's Modified Eagle Media(®) (DMEM) and Minimum Essential Media(®) (MEM), as compared to the Roswell Park Memorial Institute(®) (RPMI-1640) media. Finally, the cell viability of lymphocytes was found to be strongly influenced by the concentration of MnSe QDs, and had a safe limit upto 0.5 μM. With BSA inclusion in cell media, the cellular uptake of MnSe QDs was observed to be more prominent, as revealed from fluorescence imaging. The fabrication of water soluble, nontoxic MnSe QDs would open up an alternative strategy in nanobiotechnology, while preserving their luminescent and magnetic properties intact.
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Affiliation(s)
- Runjun Sarma
- Emerging Nanoscience and Soft Matter Laboratory, Department of Physics, Tezpur University, PO: Napaam, Assam-784 028, India
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36
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Nakanishi T, Suzuki Y, Doi Y, Seki T, Koizumi H, Fushimi K, Fujita K, Hinatsu Y, Ito H, Tanaka K, Hasegawa Y. Enhancement of Optical Faraday Effect of Nonanuclear Tb(III) Complexes. Inorg Chem 2014; 53:7635-41. [DOI: 10.1021/ic5009363] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | | | - Koji Fujita
- Graduate
School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | | | | | - Katsuhisa Tanaka
- Graduate
School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
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37
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Zhang H, Jing L, Zeng J, Hou Y, Li Z, Gao M. Revisiting the coordination chemistry for preparing manganese oxide nanocrystals in the presence of oleylamine and oleic acid. NANOSCALE 2014; 6:5918-5925. [PMID: 24760344 DOI: 10.1039/c4nr00761a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
By pyrolyzing manganese(II) acetate in 1-octadecene in the presence of oleylamine and oleic acid, manganese oxide nanocrystals were prepared. It was observed that both MnO and Mn3O4 nanocrystals were simultaneously formed by quickly heating the reaction mixture up to 250 °C, while a preheating procedure carried out at 100 °C led to uniform MnO nanocubes that developed into eight-arm MnO nanocrystals upon prolonged reaction. To understand the mechanisms for forming these two different kinds of manganese oxide nanocrystals, i.e., Mn3O4 and MnO, the coordination between oleic acid/oleylamine and Mn(2+) was investigated. The detailed investigations suggest that Mn(2+)-oleylamine coordination is kinetically driven and favorable for the formation of Mn3O4 nanocrystals due to the relatively low electronegativity of N from oleylamine, while Mn(2+)-oleate coordination is thermodynamically driven and can prevent the central metal ion (Mn(2+)) from being oxidized owing to the relatively high electronegativity of O from the oleate ligand. Following these new insights, by properly balancing the coordination of oleic acid and oleylamine to Mn(2+), the selective synthesis of MnO and Mn3O4 nanocrystals with uniform shapes was successfully achieved.
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Affiliation(s)
- Hongwei Zhang
- Institute of Chemistry, Chinese Academy of Sciences, Bei Yi Jie 2, Zhong Guan Cun, Beijing 100190, China.
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38
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Beltran-Huarac J, Resto O, Carpena-Nuñez J, Jadwisienczak WM, Fonseca LF, Weiner BR, Morell G. Single-crystal γ-MnS nanowires conformally coated with carbon. ACS APPLIED MATERIALS & INTERFACES 2014; 6:1180-1186. [PMID: 24392737 DOI: 10.1021/am404746k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report for the first time the fabrication of single-crystal metastable manganese sulfide nanowires (γ-MnS NWs) conformally coated with graphitic carbon via chemical vapor deposition technique using a single-step route. Advanced spectroscopy and electron microscopy techniques were applied to elucidate the composition and structure of these NWs at the nanoscale, including Raman, XRD, SEM, HRTEM, EELS, EDS, and SAED. No evidence of α-MnS and β-MnS allotropes was found. The γ-MnS/C NWs have hexagonal cross-section and high aspect ratio (∼1000) on a large scale. The mechanical properties of individual γ-MnS/C NWs were examined via in situ uniaxial compression tests in a TEM-AFM. The results show that γ-MnS/C NWs are brittle with a Young's modulus of 65 GPa. The growth mechanism proposed suggests that the bottom-up fabrication of γ-MnS/C NWs is governed by vapor-liquid-solid mechanism catalyzed by bimetallic Au-Ni nanoparticles. The electrochemical performance of γ-MnS/C NWs as an anode material in lithium-ion batteries indicates that they outperform the cycling stability of stable micro-sized α-MnS, with an initial capacity of 1036 mAh g(-1) and a reversible capacity exceeding 503 mAh g(-1) after 25 cycles. This research advances the integration of carbon materials and metal sulfide nanostructures, bringing forth new avenues for potential miniaturization strategies to fabricate 1D core/shell heterostructures with intriguing bifunctional properties that can be used as building blocks in nanodevices.
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Affiliation(s)
- Juan Beltran-Huarac
- Institute for Functional Nanomaterials, University of Puerto Rico , San Juan, Puerto Rico 00931, United States
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39
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Deng M, Shen S, Zhang Y, Xu H, Wang Q. A generalized strategy for controlled synthesis of ternary metal sulfide nanocrystals. NEW J CHEM 2014. [DOI: 10.1039/c3nj00928a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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40
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Beltran-Huarac J, Palomino J, Resto O, Wang J, Jadwisienczak WM, Weiner BR, Morell G. Highly-crystalline γ-MnS nanosaws. RSC Adv 2014. [DOI: 10.1039/c4ra05561f] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Bottom-up approach to fabricate dislocation-free luminescent γ-MnS nanosaws via CVD that can be used as anode material for Li-ion batteries.
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Affiliation(s)
- Juan Beltran-Huarac
- Department of Physics and Department of Chemistry
- University of Puerto Rico
- San Juan, USA
| | - Javier Palomino
- Department of Physics and Department of Chemistry
- University of Puerto Rico
- San Juan, USA
| | - Oscar Resto
- Department of Physics and Department of Chemistry
- University of Puerto Rico
- San Juan, USA
| | - Jingzhou Wang
- School of Electrical Engineering and Computer Science
- Ohio University
- Athens, USA
| | | | - Brad R. Weiner
- Department of Physics and Department of Chemistry
- University of Puerto Rico
- San Juan, USA
| | - Gerardo Morell
- Department of Physics and Department of Chemistry
- University of Puerto Rico
- San Juan, USA
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41
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Baghbanzadeh M, Glasnov TN, Kappe CO. Continuous-Flow Production of Photocatalytically Active Titanium Dioxide Nanocrystals and Its Application to the Photocatalytic Addition ofN,N-Dimethylaniline toN-Methylmaleimide. J Flow Chem 2013. [DOI: 10.1556/jfc-d-13-00018] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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42
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Kawashima A, Nakanishi T, Shibayama T, Watanabe S, Fujita K, Tanaka K, Koizumi H, Fushimi K, Hasegawa Y. Enhanced Magneto-optical Properties of Semiconductor EuS Nanocrystals Assisted by Surface Plasmon Resonance of Gold Nanoparticles. Chemistry 2013; 19:14438-45. [DOI: 10.1002/chem.201302259] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Indexed: 11/06/2022]
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43
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Li H, Kanaras AG, Manna L. Colloidal branched semiconductor nanocrystals: state of the art and perspectives. Acc Chem Res 2013; 46:1387-96. [PMID: 23369428 DOI: 10.1021/ar3002409] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Colloidal inorganic nanocrystals are versatile nanoscale building blocks. Advances in their synthesis have yielded nanocrystals with various morphologies including spheres, polyhedra, rods, disks, sheets, wires, and a wide range of branched shapes. Recent developments in chemical methods have allowed the synthesis of colloidal nanocrystals made of sections of different inorganic materials connected together. Many research groups are investigating these nanocrystals' structural and photophysical properties experimentally and theoretically, and many have examined their prospects for commercial applications. Branched nanocrystals, in particular, are gaining attention, in part for their potential applications in solar cells or electronic devices. In this Account, we review recent developments in synthesis and controlled assembly of colloidal branched nanocrystals. Synthesis of branched nanocrystals builds on previous work with spherical nanocrystals and nanorods, but a unique factor is the need to control the branching event. Multiple arms can branch from a nucleus, or secondary branches can form from a growing arm. Branching can be governed by mechanisms including twinning, crystal splitting, polymorphism, oriented attachment, and others. One of the most relevant parameters is the choice of appropriate surfactant molecules, which can bind selectively to certain crystal facets or can even promote specific crystallographic phases during nucleation and growth. Also, seeded growth approaches recently have allowed great progress in the synthesis of nanocrystals with elaborate shapes. In this approach, nanocrystals with a specified chemical composition, size, shape, crystalline habit, and phase act as seeds on which multiple branches of a second material nucleate and grow. These approaches yield nanostructures with improved homogeneity in distribution of branch length and cross section. Ion exchange reactions allow further manipulation of branched nanocrystals by transforming crystals of one material into crystals with the same size, shape, and anion sublattice but with a new cation. Combining seeded growth with ion exchange provides a method for greatly expanding the library of branched nanocrystals. Assembly of morphologically complex nanocrystals is evolving in parallel to developments in chemical synthesis. While researchers have made many advances in the past decade in controlled assembly of nanocrystals with simple polyhedral shapes, modeling and experimental realization of ordered superstructures of branched nanocrystals are still in their infancy. In the only case of ordered superstructure reported so far, the assembly proceeds by steps in a hierarchical fashion, in analogy to several examples of assembly found in nature. Meanwhile, disordered assemblies of branched nanocrystals are also interesting and may find applications in various fields.
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Affiliation(s)
- Hongbo Li
- Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
| | - Antonios G. Kanaras
- Physics and Astronomy, Faculty of Physical and Applied Sciences, University of Southampton, SO171BJ Southampton, U.K
| | - Liberato Manna
- Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy
- Kavli Institute of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
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44
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Wang TM, Gao B, Wang Q, Zhao M, Kang KB, Xu ZG, Zhang HL. A Facile Phosphine-Free Method for Synthesizing PbSe Nanocrystals with Strong Optical Limiting Effects. Chem Asian J 2013; 8:912-8. [DOI: 10.1002/asia.201201154] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 01/04/2013] [Indexed: 11/09/2022]
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45
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Hasegawa Y, Maeda M, Nakanishi T, Doi Y, Hinatsu Y, Fujita K, Tanaka K, Koizumi H, Fushimi K. Effective optical Faraday rotations of semiconductor EuS nanocrystals with paramagnetic transition-metal ions. J Am Chem Soc 2013; 135:2659-66. [PMID: 23343325 DOI: 10.1021/ja3106253] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Novel EuS nanocrystals containing paramagnetic Mn(II), Co(II), or Fe(II) ions have been reported as advanced semiconductor materials with effective optical rotation under a magnetic field, Faraday rotation. EuS nanocrystals with transition-metal ions, EuS:M nanocrystals, were prepared by the reduction of the Eu(III) dithiocarbamate complex tetraphenylphosphonium tetrakis(diethyldithiocarbamate)europium(III) with transition-metal complexes at 300 °C. The EuS:M nanocrystals thus prepared were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), inductively coupled plasma atomic emission spectroanalysis (ICP-AES), and a superconducting quantum interference device (SQUID) magnetometer. Enhanced Faraday rotations of the EuS:M nanocrystals were observed around 550 nm, and their enhanced spin polarization was estimated using electron paramagnetic resonance (EPR) measurements. In this report, the magneto-optical relationship between the Faraday rotation efficiency and spin polarization is discussed.
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Affiliation(s)
- Yasuchika Hasegawa
- Faculty of Engineering, Hokkaido University, N13 W8, Sapporo, Hokkaido 060-8628, Japan.
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46
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Pang H, Yan Z, Ma Y, Li G, Chen J, Zhang J, Du W, Li S. Cobalt pyrophosphate nano/microstructures as promising electrode materials of supercapacitor. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2007-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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47
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Effect of spin ordering on structure and structural transitions in the (MnS)6 magic cluster. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.11.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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48
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Mei Y, Wu S. Morphology control of YMn2O5 nanocrystals by hydrothermal synthesis and their magnetic properties. RSC Adv 2013. [DOI: 10.1039/c3ra41671b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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49
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Ghows N, Entezari MH. Kinetic investigation on sono-degradation of Reactive Black 5 with core-shell nanocrystal. ULTRASONICS SONOCHEMISTRY 2013; 20:386-394. [PMID: 22818362 DOI: 10.1016/j.ultsonch.2012.06.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Revised: 06/14/2012] [Accepted: 06/19/2012] [Indexed: 06/01/2023]
Abstract
The experimental data of sonocatalytic degradation of Reactive Black 5 (RB5) as an azo dye by core-shell nanocrystals (CdS-TiO(2)) were applied to the proper kinetic models. In this work, two kinetic models were proposed and fitted properly to the data. In the first one, the heterogeneous reaction was considered similar to the Langmuir-Hinshelwood (L-H) mechanism and the kinetic rate parameters were determined. In this model, short time of sonication with initial concentration changes has been applied and the contribution of the reaction intermediates has been neglected in degradation. Hence, this model may not be valid for longer reaction times where the reaction intermediates effects prevail. In the second one, two first-order reactions in series provided the most convincing rate form for the sonodegradation of dyes adsorbed on the synthesized nanocomposite. In these series reactions, the first step is the conversion of colored dye to colored intermediate, and the second step is the conversion to colorless product(s). The obtained results were in good agreement with the proposed kinetic models. The rate constants of degradation of catalyzed reaction were higher than that obtained without catalyst, solar and UV irradiation.
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Affiliation(s)
- N Ghows
- Department of Chemistry, Ferdowsi University of Mashhad, 91775 Mashhad, Iran
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50
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Hill LJ, Bull MM, Sung Y, Simmonds AG, Dirlam PT, Richey NE, DeRosa SE, Shim IB, Guin D, Costanzo PJ, Pinna N, Willinger MG, Vogel W, Char K, Pyun J. Directing the deposition of ferromagnetic cobalt onto Pt-tipped CdSe@CdS nanorods: synthetic and mechanistic insights. ACS NANO 2012; 6:8632-45. [PMID: 22900605 DOI: 10.1021/nn3019859] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
A methodology providing access to dumbbell-tipped, metal-semiconductor and metal oxide-semiconductor heterostructured nanorods has been developed. The synthesis and characterization of CdSe@CdS nanorods incorporating ferromagnetic cobalt nanoinclusions at both nanorod termini (i.e., dumbbell morphology) are presented. The key step in the synthesis of these heterostructured nanorods was the decoration of CdSe@CdS nanorods with platinum nanoparticle tips, which promoted the deposition of metallic CoNPs onto Pt-tipped CdSe@CdS nanorods. Cobalt nanoparticle tips were then selectively oxidized to afford CdSe@CdS nanorods with cobalt oxide domains at both termini. In the case of longer cobalt-tipped nanorods, heterostructured nanorods were observed to self-organize into complex dipolar assemblies, which formed as a consequence of magnetic associations of terminal CoNP tips. Colloidal polymerization of these cobalt-tipped nanorods afforded fused nanorod assemblies from the oxidation of cobalt nanoparticle tips at the ends of nanorods via the nanoscale Kirkendall effect. Wurtzite CdS nanorods survived both the deposition of metallic CoNP tips and conversion into cobalt oxide phases, as confirmed by both XRD and HRTEM analysis. A series of CdSe@CdS nanorods of four different lengths ranging from 40 to 174 nm and comparable diameters (6-7 nm) were prepared and modified with both cobalt and cobalt oxide tips. The total synthesis of these heterostructured nanorods required five steps from commercially available reagents. Key synthetic considerations are discussed, with particular emphasis on reporting isolated yields of all intermediates and products from scale up of intermediate precursors.
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Affiliation(s)
- Lawrence J Hill
- Department of Chemistry and Biochemistry, University of Arizona, 1306 E. University Boulevard, Tucson, Arizona 85721, USA
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