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He Q, Yuan T, Wang Y, Guleria A, Wei S, Zhang G, Sun L, Liu J, Yu J, Young DP, Lin H, Khasanov A, Guo Z. Manipulating the dimensional assembly pattern and crystalline structures of iron oxide nanostructures with a functional polyolefin. NANOSCALE 2016; 8:1915-1920. [PMID: 26754459 DOI: 10.1039/c5nr07213a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Controlled crystalline structures (α- and γ-phase) and assembly patterns (1-D, 2-D and 3-D) were achieved in the synthesized iron oxide (Fe2O3) nanoparticles (NPs) using polymeric surfactant-polypropylene grafted maleic anhydride (PP-g-MA) with different concentrations. In addition, the change of the crystalline structure from the α- and γ-phase also led to the significantly increased saturation magnetization and coercivity.
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Affiliation(s)
- Qingliang He
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Tingting Yuan
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Yiran Wang
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Abhishant Guleria
- Department of Chemistry and Biochemistry, Lamar University, Beaumont, Texas 77710, USA.
| | - Suying Wei
- Department of Chemistry and Biochemistry, Lamar University, Beaumont, Texas 77710, USA.
| | - Guoqi Zhang
- Department of Sciences, John Jay College and the Graduate Center, The City University of New York, New York, 10019, USA.
| | - Luyi Sun
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - Jingjing Liu
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - Jingfang Yu
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - David P Young
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - Hongfei Lin
- Department of Chemical and Materials Engineering, University of Nevada, Reno, Nevada 89557, USA
| | - Airat Khasanov
- Department of Chemistry, University of North Carolina at Asheville, Asheville, North Carolina 28804, USA
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
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Guan C, Wang Y, Zacharias M, Wang J, Fan HJ. Atomic-layer-deposition alumina induced carbon on porous Ni(x)Co(1-x)O nanonets for enhanced pseudocapacitive and Li-ion storage performance. NANOTECHNOLOGY 2015; 26:014001. [PMID: 25489994 DOI: 10.1088/0957-4484/26/1/014001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A unique composite nanonet of metal oxide@carbon interconnected sheets is obtained by atomic layer deposition (ALD)-assisted fabrication. In this nanonet structure, mesoporous metal oxide nanosheets are covered by a layer of amorphous carbon nanoflakes. Specifically, quasi-vertical aligned and mesoporous Ni(x)Co(1-x)O nanosheets are first fabricated directly on nickel foam substrates by a hydrothermal method. Then, an ALD-enabled carbon coating method is applied for the growth of carbon nanoflakes on the surface of the nanosheets. The thus formed 3D hierarchical structure of Ni(x)Co(1-x)O@carbon composite flakes have a higher surface area, better electrical conductivity and structure stability than the bare Ni(x)Co(1-x)O. The application of such composite nanomaterials is demonstrated as electrodes for a supercapacitor and a lithium-ion battery. In both tests, the composite electrode shows enhancement in capacity and cycling stability. This effective composite nanostructure design of metal oxides@carbon flakes could provide a promising method to construct high-performance materials for energy and environment applications.
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Affiliation(s)
- Cao Guan
- Department of Materials Science and Engineering, National University of Singapore, 117574 Singapore. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
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Stulz E. DNA architectonics: towards the next generation of bio-inspired materials. Chemistry 2012; 18:4456-69. [PMID: 22407800 DOI: 10.1002/chem.201102908] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Indexed: 12/13/2022]
Abstract
The use of DNA in nanobiotechnology has advanced to a stage at which almost any two or three dimensional architecture can be designed with high precision. The choice of the DNA sequences is essential for successful self-assembly, and opens new ways of making nanosized monomolecular assemblies with predictable structure and size. The inclusion of designer nucleoside analogues further adds functionality with addressable groups, which have an influence on the function of the DNA nano-objects. This article highlights the recent achievements in this emerging field and gives an outlook on future perspectives and applications.
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Affiliation(s)
- Eugen Stulz
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, UK.
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