101
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Fan Z, Chen Y, Zhu Y, Wang J, Li B, Zong Y, Han Y, Zhang H. Epitaxial growth of unusual 4H hexagonal Ir, Rh, Os, Ru and Cu nanostructures on 4H Au nanoribbons. Chem Sci 2016; 8:795-799. [PMID: 28451229 PMCID: PMC5299933 DOI: 10.1039/c6sc02953a] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 09/10/2016] [Indexed: 12/02/2022] Open
Abstract
This edge article reports the epitaxial growth of five 4H hexagonal metal nanostructures on 4H Au nanoribbons under ambient conditions.
Metal nanomaterials normally adopt the same crystal structure as their bulk counterparts. Herein, for the first time, the unusual 4H hexagonal Ir, Rh, Os, Ru and Cu nanostructures have been synthesized on 4H Au nanoribbons (NRBs) via solution-phase epitaxial growth under ambient conditions. Interestingly, the 4H Au NRBs undergo partial phase transformation from 4H to face-centered cubic (fcc) structures after the metal coating. As a result, a series of polytypic 4H/fcc bimetallic Au@M (M = Ir, Rh, Os, Ru and Cu) core–shell NRBs has been obtained. We believe that the rational crystal structure-controlled synthesis of metal nanomaterials will bring new opportunities for exploring their phase-dependent physicochemical properties and promising applications.
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Affiliation(s)
- Zhanxi Fan
- Center for Programmable Materials , School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . ; http://www.ntu.edu.sg/home/hzhang/
| | - Ye Chen
- Center for Programmable Materials , School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . ; http://www.ntu.edu.sg/home/hzhang/
| | - Yihan Zhu
- Advanced Membranes and Porous Materials Center , Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
| | - Jie Wang
- Center for Programmable Materials , School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . ; http://www.ntu.edu.sg/home/hzhang/
| | - Bing Li
- Institute of Materials Research and Engineering , Agency for Science, Technology and Research (ASTAR) , 2 Fusionopolis Way, Innovis #08-03 , Singapore 138634 , Singapore
| | - Yun Zong
- Institute of Materials Research and Engineering , Agency for Science, Technology and Research (ASTAR) , 2 Fusionopolis Way, Innovis #08-03 , Singapore 138634 , Singapore
| | - Yu Han
- Advanced Membranes and Porous Materials Center , Physical Sciences and Engineering Division , King Abdullah University of Science and Technology , Thuwal 23955-6900 , Saudi Arabia
| | - Hua Zhang
- Center for Programmable Materials , School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . ; http://www.ntu.edu.sg/home/hzhang/
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102
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Shape/size controlling syntheses, properties and applications of two-dimensional noble metal nanocrystals. Front Chem Sci Eng 2016. [DOI: 10.1007/s11705-016-1576-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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103
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Andrews AM, Liao WS, Weiss PS. Double-Sided Opportunities Using Chemical Lift-Off Lithography. Acc Chem Res 2016; 49:1449-57. [PMID: 27064348 DOI: 10.1021/acs.accounts.6b00034] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We discuss the origins, motivation, invention, development, applications, and future of chemical lift-off lithography, in which a specified pattern of a self-assembled monolayer is removed, i.e., lifted off, using a reactive, patterned stamp that is brought into contact with the monolayer. For Au substrates, this process produces a supported, patterned monolayer of Au on the stamp in addition to the negative pattern in the original molecular monolayer. Both the patterned molecular monolayer on the original substrate and the patterned supported metal monolayer on the stamp are useful as materials and for further applications in sensing and other areas. Chemical lift-off lithography effectively lowers the barriers to and costs of high-resolution, large-area nanopatterning. On the patterned monolayer side, features in the single-nanometer range can be produced across large (square millimeter or larger) areas. Patterns smaller than the original stamp feature sizes can be produced by controlling the degree of contact between the stamp and the lifted-off monolayer. We note that this process is different than conventional lift-off processes in lithography in that chemical lift-off lithography removes material, whereas conventional lift-off is a positive-tone patterning method. Chemical lift-off lithography is in some ways similar to microtransfer printing. Chemical lift-off lithography has critical advantages in the preparation of biocapture surfaces because the molecules left behind are exploited to space and to orient functional(ized) molecules. On the supported metal monolayer side, a new two-dimensional material has been produced. The useful important chemical properties of Au (vis-à-vis functionalization with thiols) are retained, but the electronic and optical properties of bulk Au or even Au nanoparticles are not. These metal monolayers do not quench excitation and may be useful in optical measurements, particularly in combination with selective binding due to attached molecular recognition elements. In contrast to materials such as graphene that have bonding confined to two dimensions, these metal monolayers can be straightforwardly patterned-by patterning the stamp, the initial monolayer, or the initial substrate. Well-developed thiol-Au and related chemistries can be used on the supported monolayers. As there is little quenching and photoabsorption, spectroscopic imaging methods can be used on these functionalized materials. We anticipate that the properties of the metal monolayers can be tuned by varying the chemical, physical, and electronic connections made by and to the supporting molecular layers. That is, the amount of charge in the layer can be determined by controlling the density of S-Au (or other) connections and the molecular backbone and functionality, which determine the strength with which the chemical contact withdraws charge from the metal. This process should work for other coinage-metal substrates and additional systems where the binding of the outermost layers to the substrate is weaker than the molecule-substrate attachment.
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Affiliation(s)
- Anne M. Andrews
- California
NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, Los
Angeles, California 90095, United States
- Department
of Psychiatry, Hatos Center for Neuropharmacology, and Semel Institute
for Neuroscience and Human Behavior, University of California, Los Angeles, Los
Angeles, California 90095, United States
| | - Wei-Ssu Liao
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Paul S. Weiss
- California
NanoSystems Institute, University of California, Los Angeles, Los Angeles, California 90095, United States
- Department
of Chemistry and Biochemistry, University of California, Los Angeles, Los
Angeles, California 90095, United States
- Department
of Materials Science and Engineering, University of California, Los Angeles, Los
Angeles, California 90095, United States
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104
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Kumar P, Singh S, Gupta BK. Future prospects of luminescent nanomaterial based security inks: from synthesis to anti-counterfeiting applications. NANOSCALE 2016; 8:14297-340. [PMID: 27424665 DOI: 10.1039/c5nr06965c] [Citation(s) in RCA: 177] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Counterfeiting of valuable documents, currency and branded products is a challenging problem that has serious economic, security and health ramifications for governments, businesses and consumers all over the world. It is estimated that counterfeiting represents a multi-billion dollar underground economy with counterfeit products being produced on a large scale every year. Counterfeiting is an increasingly high-tech crime and calls for high-tech solutions to prevent and deter the acts of counterfeiting. The present review briefly outlines and addresses the key challenges in this area, including the above mentioned concerns for anti-counterfeiting applications. This article describes a unique combination of all possible kinds of security ink formulations based on lanthanide doped luminescent nanomaterials, quantum dots (semiconductor and carbon based), metal organic frameworks as well as plasmonic nanomaterials for their possible use in anti-counterfeiting applications. Moreover, in this review, we have briefly discussed and described the historical background of luminescent nanomaterials, basic concepts and detailed synthesis methods along with their characterization. Furthermore, we have also discussed the methods adopted for the fabrication and design of luminescent security inks, various security printing techniques and their anti-counterfeiting applications.
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Affiliation(s)
- Pawan Kumar
- Academy of Scientific and Innovative Research (AcSIR), CSIR - National Physical Laboratory Campus, Dr K S Krishnan Road, New Delhi 110012, India and Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
| | - Satbir Singh
- Academy of Scientific and Innovative Research (AcSIR), CSIR - National Physical Laboratory Campus, Dr K S Krishnan Road, New Delhi 110012, India and Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
| | - Bipin Kumar Gupta
- Luminescent Materials and Devices Group, Materials Physics and Engineering Division, CSIR - National Physical Laboratory, Dr K S Krishnan Road, New Delhi, 110012, India.
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105
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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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106
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Jiang K, Wang P, Guo S, Zhang X, Shen X, Lu G, Su D, Huang X. Ordered PdCu-Based Nanoparticles as Bifunctional Oxygen-Reduction and Ethanol-Oxidation Electrocatalysts. Angew Chem Int Ed Engl 2016; 55:9030-5. [PMID: 27253520 DOI: 10.1002/anie.201603022] [Citation(s) in RCA: 160] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Indexed: 11/07/2022]
Abstract
The development of superior non-platinum electrocatalysts for enhancing the electrocatalytic activity and stability for the oxygen-reduction reaction (ORR) and liquid fuel oxidation reaction is very important for the commercialization of fuel cells, but still a great challenge. Herein, we demonstrate a new colloidal chemistry technique for making structurally ordered PdCu-based nanoparticles (NPs) with composition control from PdCu to PdCuNi and PtCuCo. Under the dual tuning on the composition and intermetallic phase, the ordered PdCuCo NPs exhibit better activity and much enhanced stability for ORR and ethanol-oxidation reaction (EOR) than those of disordered PdCuM NPs, the commercial Pt/C and Pd/C catalysts. The density functional theory (DFT) calculations reveal that the improved ORR activity on the PdCuM NPs stems from the catalytically active hollow sites arising from the ligand effect and the compressive strain on the Pd surface owing to the smaller atomic size of Cu, Co, and Ni.
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Affiliation(s)
- Kezhu Jiang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China
| | - Pengtang Wang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China
| | - Shaojun Guo
- Department of Materials Science & Engineering, College of Engineering, Peking University, Beijing, 100871, China.
| | - Xu Zhang
- Department of Physics and Astronomy, California State University, Northridge, CA, USA
| | - Xuan Shen
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Gang Lu
- Department of Physics and Astronomy, California State University, Northridge, CA, USA
| | - Dong Su
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Xiaoqing Huang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu, 215123, China.
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107
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Jiang K, Wang P, Guo S, Zhang X, Shen X, Lu G, Su D, Huang X. Ordered PdCu‐Based Nanoparticles as Bifunctional Oxygen‐Reduction and Ethanol‐Oxidation Electrocatalysts. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603022] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kezhu Jiang
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Jiangsu 215123 China
| | - Pengtang Wang
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Jiangsu 215123 China
| | - Shaojun Guo
- Department of Materials Science & Engineering, College of Engineering Peking University Beijing 100871 China
| | - Xu Zhang
- Department of Physics and Astronomy California State University Northridge CA USA
| | - Xuan Shen
- Center for Functional Nanomaterials Brookhaven National Laboratory Upton NY 11973 USA
| | - Gang Lu
- Department of Physics and Astronomy California State University Northridge CA USA
| | - Dong Su
- Center for Functional Nanomaterials Brookhaven National Laboratory Upton NY 11973 USA
| | - Xiaoqing Huang
- College of Chemistry, Chemical Engineering and Materials Science Soochow University Jiangsu 215123 China
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108
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Song CY, Yang BY, Chen WQ, Dou YX, Yang YJ, Zhou N, Wang LH. Gold nanoflowers with tunable sheet-like petals: facile synthesis, SERS performances and cell imaging. J Mater Chem B 2016; 4:7112-7118. [DOI: 10.1039/c6tb01046f] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold nanoflowers with tunable sheet-like petals were controllably synthesized, and their SERS performances as well as their application in cell imaging were studied.
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Affiliation(s)
- C. Y. Song
- Key Lab for Organic Electronics & Information Displays (KLOEID)
- Institute of Advanced Materials (IAM)
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - B. Y. Yang
- Key Lab for Organic Electronics & Information Displays (KLOEID)
- Institute of Advanced Materials (IAM)
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - W. Q. Chen
- Key Lab for Organic Electronics & Information Displays (KLOEID)
- Institute of Advanced Materials (IAM)
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - Y. X. Dou
- Key Lab for Organic Electronics & Information Displays (KLOEID)
- Institute of Advanced Materials (IAM)
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - Y. J. Yang
- Key Lab for Organic Electronics & Information Displays (KLOEID)
- Institute of Advanced Materials (IAM)
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - N. Zhou
- Key Lab for Organic Electronics & Information Displays (KLOEID)
- Institute of Advanced Materials (IAM)
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
| | - L. H. Wang
- Key Lab for Organic Electronics & Information Displays (KLOEID)
- Institute of Advanced Materials (IAM)
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Nanjing University of Posts & Telecommunications
- Nanjing 210023
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109
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Wu C, Zhou X, Wei J. Localized Surface Plasmon Resonance of Silver Nanotriangles Synthesized by a Versatile Solution Reaction. NANOSCALE RESEARCH LETTERS 2015; 10:1058. [PMID: 26340946 PMCID: PMC4560725 DOI: 10.1186/s11671-015-1058-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 08/25/2015] [Indexed: 05/24/2023]
Abstract
The surface plasmon resonance (SPR) of silver nanoparticles can be tuned throughout the visible and near-infrared region by their shape and size. Considering SPR applications, an easy and controllable method for preparing the silver nanocrystals with defined shape and size, is necessary. In this work, the triangular silver nanoplates were synthesized by reducing Ag(+) ions with ascorbic acid in the presence of silver seeds and poly(vinylpyrrolidone) (PVP) at room temperature. Both the seeds (as the nucleation sites) and PVP (as the capping reagent) played an important role in determining the edge length of the silver nanotriangles. The SPR of silver nanotriangles showed three distinct bands corresponding to the in-plane dipole, quadrupole, and out-plane quadrupole plasmon resonance, and the SPR shifted to shorter wavelengths with the decreased edge length of the silver nanotriangles as the theoretical calculation.
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Affiliation(s)
- Chunfang Wu
- />Institute of Functional and Environmental Materials, School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000 China
| | - Xue Zhou
- />Institute of Functional and Environmental Materials, School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu 730000 China
| | - Jie Wei
- />Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, Xi’an Jiaotong University, Xi’an, Shanxi 710049 China
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110
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Lu X, Xu K, Tao S, Shao Z, Peng X, Bi W, Chen P, Ding H, Chu W, Wu C, Xie Y. Engineering the electronic structure of two-dimensional subnanopore nanosheets using molecular titanium-oxide incorporation for enhanced photocatalytic activity. Chem Sci 2015; 7:1462-1467. [PMID: 29910904 PMCID: PMC5975925 DOI: 10.1039/c5sc03551a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2015] [Accepted: 11/11/2015] [Indexed: 12/20/2022] Open
Abstract
Regulating the electronic band structure of 2D CN nanosheets via subnanopore engineering.
Engineering the electronic structure of two-dimensional (2D) nanomaterials endows unique physical and chemical properties. Although developed modification strategies have significantly expanded the applications of 2D nanomaterials, exploring new strategies to regulate the electronic structure of 2D nanomaterials is also expected. Herein, we highlight a new strategy to engineer the electronic structure of 2D subnanoporous nanomaterials. As a proof of concept, based on controllable subnanopore engineering using molecular titanium-oxide incorporation, the electronic band structure of 2D graphitic carbon nitride (CN) nanosheets has been efficiently tuned with the enhancement of visible light absorption as well as separation and the migration rate of photo-excited charge carriers, exhibiting significantly improved photocatalytic activity under visible light irradiation. Our work opens a new door to engineering the intrinsic properties of 2D subnanoporous nanomaterials.
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Affiliation(s)
- Xiuli Lu
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Kun Xu
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Shi Tao
- National Synchrotron Radiation Laboratory University of Science & Technology of China , Hefei , Anhui 230029 , P. R. China .
| | - Zewei Shao
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Xu Peng
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Wentuan Bi
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Pengzuo Chen
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Hui Ding
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Wangsheng Chu
- National Synchrotron Radiation Laboratory University of Science & Technology of China , Hefei , Anhui 230029 , P. R. China .
| | - Changzheng Wu
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
| | - Yi Xie
- Hefei National Laboratory for Physical Sciences at the Microscale , iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) , Hefei Science Center (CAS) , CAS Key Laboratory of Mechanical Behavior and Design of Materials , University of Science & Technology of China , Hefei , Anhui 230026 , P. R. China .
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111
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Abstract
The past decade has witnessed an extraordinary increase in research progress on ultrathin two-dimensional (2D) nanomaterials in the fields of condensed matter physics, materials science, and chemistry after the exfoliation of graphene from graphite in 2004. This unique class of nanomaterials has shown many unprecedented properties and thus is being explored for numerous promising applications. In this Perspective, I briefly review the state of the art in the development of ultrathin 2D nanomaterials and highlight their unique advantages. Then, I discuss the typical synthetic methods and some promising applications of ultrathin 2D nanomaterials together with some personal insights on the challenges in this research area. Finally, on the basis of the current achievement on ultrathin 2D nanomaterials, I give some personal perspectives on potential future research directions.
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Affiliation(s)
- Hua Zhang
- School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore
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112
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Tan C, Zhang H. Epitaxial Growth of Hetero-Nanostructures Based on Ultrathin Two-Dimensional Nanosheets. J Am Chem Soc 2015; 137:12162-74. [DOI: 10.1021/jacs.5b03590] [Citation(s) in RCA: 196] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Chaoliang Tan
- School of Materials Science
and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Hua Zhang
- School of Materials Science
and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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113
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Athar T, Vishwakarma SK, Alabass R, Alqaralosy A, Khan AA. Synthesis of nanostructured framework of novel ZnBaO2 nanopowder via wet chemical approach and hepatocytotoxicity response. APPLIED NANOSCIENCE 2015. [DOI: 10.1007/s13204-015-0497-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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114
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Fan Z, Zhang X, Yang J, Wu XJ, Liu Z, Huang W, Zhang H. Synthesis of 4H/fcc-Au@Metal Sulfide Core–Shell Nanoribbons. J Am Chem Soc 2015; 137:10910-3. [DOI: 10.1021/jacs.5b06405] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhanxi Fan
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Xiao Zhang
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Jian Yang
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Xue-Jun Wu
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Zhengdong Liu
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Wei Huang
- Key Laboratory for Organic Electronics and Information Displays & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211816, China
| | - Hua Zhang
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
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115
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Chhetri M, Rana M, Loukya B, Patil PK, Datta R, Gautam UK. Mechanochemical Synthesis of Free-Standing Platinum Nanosheets and Their Electrocatalytic Properties. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:4430-4437. [PMID: 26100079 DOI: 10.1002/adma.201501056] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 05/18/2015] [Indexed: 06/04/2023]
Abstract
Robust, 26 nm thick free-standing platinum nanosheets, an extremely rare morphology for metal nanostructures, are obtained by employing fluid induced shearing force of the order of 1.8 N and differential shear-stress of 0.5 kPa across the diameter of a Te template nanorod undergoing galvanic displacement by Pt4+ . Corrugation leads to their large surface area and much improved electrocatalytic properties when compared with conventional Pt catalysts.
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Affiliation(s)
- Manjeet Chhetri
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India
| | - Moumita Rana
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India
| | - B Loukya
- International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India
| | - Pramod K Patil
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India
| | - Ranjan Datta
- International Centre for Materials Science, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, 560064, India
| | - Ujjal K Gautam
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore, India
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116
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Min Y, Park G, Kim B, Giri A, Zeng J, Roh JW, Kim SI, Lee KH, Jeong U. Synthesis of Multishell Nanoplates by Consecutive Epitaxial Growth of Bi2Se3 and Bi2Te3 Nanoplates and Enhanced Thermoelectric Properties. ACS NANO 2015; 9:6843-53. [PMID: 26134746 DOI: 10.1021/nn507250r] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
We herein demonstrate the successive epitaxial growth of Bi2Te3 and Bi2Se3 on seed nanoplates for the scalable synthesis of heterostructured nanoplates (Bi2Se3@Bi2Te3) and multishell nanoplates (Bi2Se3@Bi2Te3@Bi2Se3, Bi2Se3@Bi2Te3@Bi2Se3@Bi2Te3). The relative dimensions of the constituting layers are controllable via the molar ratios of the precursors added to the seed nanoplate solution. Reduction of the precursors produces nanoparticles that attach preferentially to the sides of the seed nanoplates. Once attached, the nanoparticles reorganize epitaxially on the seed crystal lattices to form single-crystalline core-shell nanoplates. The nanoplates, initially 100 nm wide, grew laterally to 620 nm in the multishell structure, while their thickness increased more moderately, from 5 to 20 nm. The nanoplates were pelletized into bulk samples by spark plasma sintering and their thermoelectric properties are compared. A peak thermoelectric figure of merit (ZT) ∼0.71 was obtained at 450 K for the bulk of Bi2Se3@Bi2Te3 nanoplates by simultaneous modulation of electronic and thermal transport in the presence of highly dense grain and phase boundaries.
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Affiliation(s)
- Yuho Min
- †Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seoul 120-749, Korea
| | - Gyeongbae Park
- ‡Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang 790-784, Korea
| | - Bongsoo Kim
- †Department of Materials Science and Engineering, Yonsei University, 134 Shinchon-dong, Seoul 120-749, Korea
| | - Anupam Giri
- ‡Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang 790-784, Korea
| | | | - Jong Wook Roh
- ∥Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Suwon 443-803, Korea
| | - Sang Il Kim
- ∥Materials Research Center, Samsung Advanced Institute of Technology, Samsung Electronics, Suwon 443-803, Korea
| | - Kyu Hyoung Lee
- ⊥Department of Nano Applied Engineering, Kangwon National University, Chuncheon 200-701, Korea
| | - Unyong Jeong
- ‡Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang 790-784, Korea
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117
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Chen Q, Jia Y, Shen W, Xie S, Yang Y, Cao Z, Xie Z, Zheng L. Rational design and synthesis of excavated trioctahedral Au nanocrystals. NANOSCALE 2015; 7:10728-10734. [PMID: 26030607 DOI: 10.1039/c5nr02017d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Excavated polyhedral nanostructures, possessing the features of high surface area and well-defined surface structure with a specific crystal facet and avoidance of aggregation, could be one of the best choices for the purpose of reducing consumption and improving performance of noble metals in many application fields. However, the formation of the excavated structures is thermodynamically unfavourable and its rational synthesis is far beyond our knowledge. In this work, taking overgrowth of Pd onto trioctahedral Au nanocrystals as a model, we present a deep insight study for synthesizing an excavated structure relying on the protection role of surfactants under suitable crystal growth kinetics. Based on the abovementioned understanding, we designed a simple and effective strategy to synthesize Au nanocrystals with excavated trioctahedral structure in one step. Due to the novel feature of the excavated structure and exposed high energy {110} facets, excavated trioctahedral Au NCs exhibited optical extinction at the near-infrared region and showed high catalytic activity towards the reduction of p-nitrophenol. Moreover, the synthetic strategy can be extended to the synthesis of excavated Au-Pd alloys.
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Affiliation(s)
- Qiaoli Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China.
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118
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Liu Y, Zhao G, Wang D, Li Y. Heterogeneous catalysis for green chemistry based on nanocrystals. Natl Sci Rev 2015. [DOI: 10.1093/nsr/nwv014] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Abstract
Modern society has an ever-increasing demand for environmentally friendly catalytic processes. Catalysis research is working towards a solution through the development of effective heterogeneous catalysts for environment-related applications. Nanotechnologies have provided effective strategies for the preparation of nanocrystals (NCs) with well-defined sizes, shapes and compositions. Precise control of these NCs provides an important foundation for the studies of structure-performance relationships in catalysis, which is critical to the design of NCs with optimized catalytic performances for practical applications. We focus on recent advances in the development of bottom-up strategies to control NCs structures for some key catalytic applications, including CO oxidation, selective oxidation of alcohols, semihydrogenation of alkynes, and selective hydrogenation of unsaturated aldehydes and nitrobenzene. These key applications have been a popular research focus because of their significance in green chemistry. Herein we also discuss the scientific understandings of the active species and active structures of these systems to gain an insight for rational design of efficient catalytic systems for these catalytic reactions.
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Affiliation(s)
- Yuxi Liu
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Guofeng Zhao
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Dingsheng Wang
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yadong Li
- Department of Chemistry, Tsinghua University, Beijing 100084, China
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119
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Khan MD, Akhtar J, Malik MA, Akhtar M, Revaprasadu N. Phase-pure fabrication and shape evolution studies of SnS nanosheets. NEW J CHEM 2015. [DOI: 10.1039/c5nj01919b] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
SnS nanosheets were synthesized by the injection of n-bis(piperidinedithiocarbamato)tin(iv) into oleylamine at 230 °C.
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Affiliation(s)
- Malik Dilshad Khan
- Department of Chemistry
- University of Zululand
- Kwa-Dlangezwa 3880
- South Africa
| | - Javeed Akhtar
- Polymers and Materials Synthesis (PMS) Lab
- Department of Physics
- COMSATS
- Institute of Information Technology (CIIT)
- Islamabad
| | - Mohammad Azad Malik
- Department of Chemistry
- University of Zululand
- Kwa-Dlangezwa 3880
- South Africa
- School of Materials
| | - Masood Akhtar
- Department of Chemistry
- University of Zululand
- Kwa-Dlangezwa 3880
- South Africa
- School of Materials
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120
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Liu HL, Nosheen F, Wang X. Noble metal alloy complex nanostructures: controllable synthesis and their electrochemical property. Chem Soc Rev 2015; 44:3056-78. [DOI: 10.1039/c4cs00478g] [Citation(s) in RCA: 381] [Impact Index Per Article: 42.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
From the perspective of noble metal alloy nanocrystals with complex structures, we highlight their controllable synthesis and improved electrochemical property.
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Affiliation(s)
- Hui-ling Liu
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
| | - Farhat Nosheen
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
| | - Xun Wang
- Department of Chemistry
- Tsinghua University
- Beijing
- P. R. China
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121
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Liu F, He X, Zhang J, Chen H, Zhang H, Wang Z. Controllable synthesis of polydopamine nanoparticles in microemulsions with pH-activatable properties for cancer detection and treatment. J Mater Chem B 2015; 3:6731-6739. [DOI: 10.1039/c5tb01159k] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple reverse microemulsion-based method was used to elaborate pH-activatable PEG–Fe–PDA nanoparticles for cancer diagnosis and therapy.
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Affiliation(s)
- Fuyao Liu
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Xiuxia He
- School of Life Science and Technology
- Changchun University of Science and Technology
- Changchun
- P. R. China
| | - Junping Zhang
- School of Life Science and Technology
- Changchun University of Science and Technology
- Changchun
- P. R. China
| | - Hongda Chen
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- P. R. China
| | - Huimao Zhang
- Department of Radiology
- The First Hospital of Jilin University
- Changchun
- P. R. China
| | - Zhenxin Wang
- State Key Laboratory of Electroanalytical Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- P. R. China
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122
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Zhang Y, Cui Z, Li L, Guo L, Yang S. Two-dimensional structure Au nanosheets are super active for the catalytic reduction of 4-nitrophenol. Phys Chem Chem Phys 2015; 17:14656-61. [DOI: 10.1039/c5cp00373c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two-dimensional structure Au nanosheets with controlled thicknesses of (a) ∼15 nm, (b) ∼35 nm, (c) ∼50 nm were synthesized by solution reduction method, and the reduction of 4-nitrophenol (4-NP) by UV-vis spectra of Au nanosheets with controlled thicknesses has been greatly enhanced.
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Affiliation(s)
- Yan Zhang
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Zhimin Cui
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Lidong Li
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Lin Guo
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
| | - Shihe Yang
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
- P. R. China
- Department of Chemistry
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