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Cao H, Qin H, Li Y, Jandt KD. The Action-Networks of Nanosilver: Bridging the Gap between Material and Biology. Adv Healthc Mater 2021; 10:e2100619. [PMID: 34309242 DOI: 10.1002/adhm.202100619] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/03/2021] [Indexed: 01/06/2023]
Abstract
The emergence of nanosilver (silver in nanoscale shapes and their assemblies) benefits the landscape of modern healthcare; however, this brings about concerns over its safety issues associated with an ultrasmall size and high mobility. By reviewing previous reporting details about the synthesis and characterization of nanosilver and its biological responses, a gap between materials synthesis and their biomedical uses is characterized by the insufficient understanding of the interacting and interplaying nanoscale actions of silver. To improve reporting quality and advance clinical translations, it is suggested that researchers have a comprehensive recognition of the "Indications for use" before designing innovative nanosilver-based materials and an "Action-network" concept addressing the acting range and strength of those nanoscale actions is implemented. Although this discussion is specific to nanosilver, the idea of "Indications for use" centered design and synthesis is generally applicable to other biomedical nanomaterials.
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Affiliation(s)
- Huiliang Cao
- Lab of Low‐Dimensional Materials Chemistry Key Laboratory for Ultrafine Materials of Ministry of Education East China University of Science and Technology Shanghai 200237 China
- Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
- Chair of Materials Science Otto Schott Institute of Materials Research Friedrich Schiller University Jena Jena 07743 Germany
| | - Hui Qin
- Department of Orthopaedics Shanghai Jiaotong University Affiliated Sixth People's Hospital Shanghai 200233 China
| | - Yongsheng Li
- Lab of Low‐Dimensional Materials Chemistry Key Laboratory for Ultrafine Materials of Ministry of Education East China University of Science and Technology Shanghai 200237 China
- Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 China
| | - Klaus D. Jandt
- Chair of Materials Science Otto Schott Institute of Materials Research Friedrich Schiller University Jena Jena 07743 Germany
- Jena Center for Soft Matter (JCSM) Friedrich Schiller University Jena Jena 07743 Germany
- Jena School for Microbial Communication (JSMC) Neugasse 23 Jena 07743 Germany
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2
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Sholokhova AY, Malkin AI, Buryak AK. Mass Spectrometry of the Laser Desorption/Ionization of Magnesium, Tungsten, and Boron Powders before and after Mechanochemical Activation. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421020242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Wang H, Lu J. A Review on Particle Size Effect in
Metal‐Catalyzed
Heterogeneous Reactions. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000205] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hengwei Wang
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, iChEM, University of Science and Technology of China Hefei Anhui 230026 China
| | - Junling Lu
- Department of Chemical Physics, Hefei National Laboratory for Physical Sciences at the Microscale, iChEM, University of Science and Technology of China Hefei Anhui 230026 China
- Dalian National Laboratory for Clean Energy, CAS Dalian 116023 China
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4
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Taccone MI, Fernández RA, Molina FL, Gustín I, Sánchez CG, Dassie SA, Pino GA. On the photophysics of electrochemically generated silver nanoclusters: spectroscopic and theoretical characterization. Phys Chem Chem Phys 2020; 22:16813-16821. [PMID: 32662468 DOI: 10.1039/d0cp02136a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Ligand-free atomic silver nanoclusters (AgNCs) were successfully synthesized following the electrochemical procedure developed by Lopez-Quintela and col. (D. Buceta, N. Busto, G. Barone, J. M. Leal, F. Domínguez, L. J. Giovanetti, F. G. Requejo, B. García and M. A. López-Quintela, Angew. Chem., Int. Ed., 2015, 54, 7612-7616), who have identified the presence of Ag2 and Ag3 AgNCs. The goal of this work was to get information on the photophysics of these AgNCs, which was achieved by combining information from excitation/emission matrix (EEM) and time resolved emission spectroscopy (TRES) along with DFT/TD-DFT calculations. This procedure allowed deconvolving the emission and excitation spectra of the AgNC mixture, with further assignment of each transition and lifetime associated to Ag2, Ag3+ and Ag42+ clusters. This deconvolution together with theoretical calculations allowed suggesting for the first time the radiative and non-radiative excited state deactivation mechanism for these clusters.
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Affiliation(s)
- Martín I Taccone
- Departamento de Fisicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Pabellón Argentina, X5000HUA Córdoba, Argentina.
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5
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Vaida ME, Marsh BM, Leone SR. Nonmetal to Metal Transition and Ultrafast Charge Carrier Dynamics of Zn Clusters on p-Si(100) by fs-XUV Photoemission Spectroscopy. NANO LETTERS 2018; 18:4107-4114. [PMID: 29856224 DOI: 10.1021/acs.nanolett.8b00700] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Understanding the electronic structure and charge carrier dynamics of supported clusters is important due to their many potential applications in photochemistry and catalysis. In this investigation, photoemission spectroscopy, in conjunction with femtosecond extreme ultraviolet (XUV) laser pulses, is used to investigate the electronic structure and ultrafast charge carrier dynamics at a Si(100) surface decorated with Zn clusters. Static photoemission spectroscopy is used to investigate the changes in the electronic structure as the dimensionality of the Zn is increased from small clusters composed of a very few atoms to metallic Zn particles. Furthermore, femtosecond optical-pump XUV-probe photoemission spectroscopy is employed to induce a charge transfer from the p-Si(100) substrate to the Zn clusters and to measure in real time the charge trapping at the Zn cluster as well as the subsequent charge relaxation. The ultrafast charge carrier dynamics are also investigated for small clusters and metallic Zn particles. Significant transient charging of the Zn clusters after excitation of the Si(100) substrate by 800 nm light is observed for Zn coverages greater than 0.12 ML Zn, which coincides with the formation of a Schottky barrier at the interface between the Zn particle and the p-Si(100) substrate. The transient signals show that the charge trapping time at the Zn cluster varies with the cluster size, which is rationalized based on the electronic structure of the cluster as well as the band energy alignment at the Zn cluster-Si(100) junction.
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Affiliation(s)
- Mihai E Vaida
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
- Department of Physics and Energy Conversion and Propulsion Cluster , University of Central Florida , Orlando , Florida 32816 , United States
| | - Brett M Marsh
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
| | - Stephen R Leone
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
- Department of Physics , University of California , Berkeley , California 94720 , United States
- Chemical Sciences Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
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6
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Huang W, Sun G, Cao T. Surface chemistry of group IB metals and related oxides. Chem Soc Rev 2017; 46:1977-2000. [DOI: 10.1039/c6cs00828c] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalytic surface chemistry of IB metals are reviewed with an attempt to bridge model catalysts and powder catalysts.
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Affiliation(s)
- Weixin Huang
- Hefei National Laboratory for Physical Sciences at the Microscale
- Key Laboratory of Materials for Energy Conversion of Chinese Academy of Sciences
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei 230026
| | - Guanghui Sun
- Hefei National Laboratory for Physical Sciences at the Microscale
- Key Laboratory of Materials for Energy Conversion of Chinese Academy of Sciences
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei 230026
| | - Tian Cao
- Hefei National Laboratory for Physical Sciences at the Microscale
- Key Laboratory of Materials for Energy Conversion of Chinese Academy of Sciences
- Department of Chemical Physics
- University of Science and Technology of China
- Hefei 230026
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7
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Zhao M, Figueroa-Cosme L, Elnabawy AO, Vara M, Yang X, Roling LT, Chi M, Mavrikakis M, Xia Y. Synthesis and Characterization of Ru Cubic Nanocages with a Face-Centered Cubic Structure by Templating with Pd Nanocubes. NANO LETTERS 2016; 16:5310-5317. [PMID: 27458871 DOI: 10.1021/acs.nanolett.6b02795] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nanocages have received considerable attention in recent years for catalytic applications owing to their high utilization efficiency of atoms and well-defined facets. Here we report, for the first time, the synthesis of Ru cubic nanocages with ultrathin walls, in which the atoms are crystallized in a face-centered cubic (fcc) rather than hexagonal close-packed (hcp) structure. The key to the success of this synthesis is to ensure layer-by-layer deposition of Ru atoms on the surface of Pd cubic seeds by controlling the reaction temperature and the injection rate of a Ru(III) precursor. By selectively etching away the Pd from the Pd@Ru core-shell nanocubes, we obtain Ru nanocages with an average wall thickness of 1.1 nm or about six atomic layers. Most importantly, the Ru nanocages adopt an fcc crystal structure rather than the hcp structure observed in bulk Ru. The synthesis has been successfully applied to Pd cubic seeds with different edge lengths in the range of 6-18 nm, with smaller seeds being more favorable for the formation of Ru shells with a flat, smooth surface due to shorter distance for the surface diffusion of the Ru adatoms. Self-consistent density functional theory calculations indicate that these unique fcc-structured Ru nanocages might possess promising catalytic properties for ammonia synthesis compared to hcp Ru(0001), on the basis of strengthened binding of atomic N and substantially reduced activation energies for N2 dissociation, which is the rate-determining step for ammonia synthesis on hcp Ru catalysts.
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Affiliation(s)
- Ming Zhao
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Legna Figueroa-Cosme
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Ahmed O Elnabawy
- Department of Chemical & Biological Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Madeline Vara
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Xuan Yang
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30332, United States
| | - Luke T Roling
- Department of Chemical & Biological Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States
| | - Manos Mavrikakis
- Department of Chemical & Biological Engineering, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Younan Xia
- School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University , Atlanta, Georgia 30332, United States
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8
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Klyushin AY, Greiner MT, Huang X, Lunkenbein T, Li X, Timpe O, Friedrich M, Hävecker M, Knop-Gericke A, Schlögl R. Is Nanostructuring Sufficient To Get Catalytically Active Au? ACS Catal 2016. [DOI: 10.1021/acscatal.5b02631] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander Yu. Klyushin
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
- Division
of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - Mark T. Greiner
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Xing Huang
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Thomas Lunkenbein
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Xuan Li
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Olaf Timpe
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Matthias Friedrich
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Michael Hävecker
- Department
of Heterogeneous Reactions, Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Axel Knop-Gericke
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Robert Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
- Division
of Energy Materials, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
- Department
of Heterogeneous Reactions, Max-Planck-Institut für Chemische Energiekonversion, Stiftstrasse 34-36, 45470 Mülheim an der Ruhr, Germany
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9
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Vysakh AB, Lazar A, Yadukiran V, Singh AP, Vinod CP. Phenylacetylene hydrogenation on Au@Ni bimetallic core–shell nanoparticles synthesized under mild conditions. Catal Sci Technol 2016. [DOI: 10.1039/c5cy02005k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The synthesis of Au@Ni bimetallic core–shell nanoparticles through an energy efficient (lower temperature) route in oleylamine following a sequential reduction strategy and their hydrogenation activity is reported.
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Affiliation(s)
- A. B. Vysakh
- Catalysis Division
- CSIR-National Chemical Laboratory
- Pune
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Anish Lazar
- Catalysis Division
- CSIR-National Chemical Laboratory
- Pune
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - V. Yadukiran
- Catalysis Division
- CSIR-National Chemical Laboratory
- Pune
- India
| | - A. P. Singh
- Catalysis Division
- CSIR-National Chemical Laboratory
- Pune
- India
| | - C. P. Vinod
- Catalysis Division
- CSIR-National Chemical Laboratory
- Pune
- India
- Academy of Scientific and Innovative Research (AcSIR)
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10
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Sreedhala S, Vinod CP. Surfactant assisted formation of ruthenium nanochains under mild conditions and their catalytic CO oxidation activity. Chem Commun (Camb) 2015; 51:10178-81. [PMID: 26015996 DOI: 10.1039/c4cc09430a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spontaneous formation of ruthenium nanochains is accomplished in aqueous medium under mild conditions using a seed mediated protocol with cetyl trimethylammonium bromide (CTAB) as the capping agent. They are formed due to the random self-assembly of Ru seeds of ∼3.5 nm size. These 1D nanostructures exhibit better catalytic activity towards the oxidation of CO relative to the ∼3.5 nm seeds and 6 nm Ru nanospheres. The synthesis strategy adopted here is found to be simple, facile and environmentally friendly.
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Affiliation(s)
- S Sreedhala
- Catalysis Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune, India - 411 008
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11
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Sreedhala S, Sudheeshkumar V, Vinod C. Oxidation catalysis by large trisoctahedral gold nanoparticles: Mind the step! Catal Today 2015. [DOI: 10.1016/j.cattod.2014.02.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Abstract
Scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) can characterize intriguing nanoparticle properties towards solid-state nanodevices.
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Affiliation(s)
- Shinya Kano
- Materials and Structures Laboratory
- Tokyo Institute of Technology
- Yokohama 226-8503
- Japan
| | - Tsukasa Tada
- Materials and Structures Laboratory
- Tokyo Institute of Technology
- Yokohama 226-8503
- Japan
| | - Yutaka Majima
- Materials and Structures Laboratory
- Tokyo Institute of Technology
- Yokohama 226-8503
- Japan
- Department of Printed Electronics Engineering
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13
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Lamey D, Prokopyeva I, Cárdenas-Lizana F, Kiwi-Minsker L. Impact of organic-ligand shell on catalytic performance of colloidal Pd nanoparticles for alkyne gas-phase hydrogenation. Catal Today 2014. [DOI: 10.1016/j.cattod.2014.03.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Crystallization of Supercooled Liquid Elements Induced by Superclusters Containing Magic Atom Numbers. METALS 2014. [DOI: 10.3390/met4030359] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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15
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Qin W, Lohrman J, Ren S. Magnetic and optoelectronic properties of gold nanocluster-thiophene assembly. Angew Chem Int Ed Engl 2014; 53:7316-9. [PMID: 24853729 DOI: 10.1002/anie.201402685] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 03/11/2014] [Indexed: 11/07/2022]
Abstract
Nanohybrids consisting of Au nanocluster and polythiophene nanowire assemblies exhibit unique thermal-responsive optical behaviors and charge-transfer controlled magnetic and optoelectronic properties. The ultrasmall Au nanocluster enhanced photoabsorption and conductivity effectively improves the photocurrent of nanohybrid based photovoltaics, leading to an increase of power conversion efficiency by 14 % under AM 1.5 illumination. In addition, nanohybrids exhibit electric field controlled spin resonance and magnetic field sensing behaviors, which open up the potential of charge-transfer complex system where the magnetism and optoelectronics interact.
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Affiliation(s)
- Wei Qin
- Department of Chemistry, University of Kansas, Lawrence, KS 66045 (USA)
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16
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Qin W, Lohrman J, Ren S. Magnetic and Optoelectronic Properties of Gold Nanocluster–Thiophene Assembly. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402685] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wei Qin
- Department of Chemistry, University of Kansas, Lawrence, KS 66045 (USA)
| | - Jessica Lohrman
- Department of Chemistry, University of Kansas, Lawrence, KS 66045 (USA)
| | - Shenqiang Ren
- Department of Chemistry, University of Kansas, Lawrence, KS 66045 (USA)
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17
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A review on the use of nanometals as catalysts for the thermal decomposition of ammonium perchlorate. JOURNAL OF SAUDI CHEMICAL SOCIETY 2013. [DOI: 10.1016/j.jscs.2011.05.009] [Citation(s) in RCA: 155] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Zhu J, Holmen A, Chen D. Carbon Nanomaterials in Catalysis: Proton Affinity, Chemical and Electronic Properties, and their Catalytic Consequences. ChemCatChem 2013. [DOI: 10.1002/cctc.201200471] [Citation(s) in RCA: 204] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Wang DH, Kim DY, Choi KW, Seo JH, Im SH, Park JH, Park OO, Heeger AJ. Enhancement of Donor-Acceptor Polymer Bulk Heterojunction Solar Cell Power Conversion Efficiencies by Addition of Au Nanoparticles. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201101021] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Wang DH, Kim DY, Choi KW, Seo JH, Im SH, Park JH, Park OO, Heeger AJ. Enhancement of donor-acceptor polymer bulk heterojunction solar cell power conversion efficiencies by addition of Au nanoparticles. Angew Chem Int Ed Engl 2011; 50:5519-23. [PMID: 21520371 DOI: 10.1002/anie.201101021] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Dong Hwan Wang
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA 93106, USA
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22
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Nanda KK. On the paradoxical relation between the melting temperature and forbidden energy gap of nanoparticles. J Chem Phys 2010; 133:054502. [DOI: 10.1063/1.3466920] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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23
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Alonso-Vante N. Platinum and Non-Platinum Nanomaterials for the Molecular Oxygen Reduction Reaction. Chemphyschem 2010; 11:2732-44. [DOI: 10.1002/cphc.200900817] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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24
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Ionova GV, Ionova IS, Mikhalko VK, Tsivadze AY. Shell model of inorganic nanoparticles. RUSS J INORG CHEM+ 2009. [DOI: 10.1134/s0036023609130026] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Podhájecká K, Dammer O, Pfleger J. Electrical Conductivity of Poly(3-octylthiophene)/Au Nanocomposites. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/masy.200850815] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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26
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Kotiaho A, Lahtinen RM, Tkachenko NV, Efimov A, Kira A, Imahori H, Lemmetyinen H. Gold nanoparticle enhanced charge transfer in thin film assemblies of porphyrin-fullerene dyads. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:13117-13125. [PMID: 18004896 DOI: 10.1021/la702535a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Photoinduced vectorial electron transfer in a molecularly organized porphyrin-fullerene (PF) dyad film is enhanced by the interlayer charge transfer from the porphyrin moiety of the dyad to an octanethiol protected (dcore approximately 2 nm) gold nanoparticle (AuNP) film. By using the time-resolved Maxwell displacement charge (TRMDC) method, the charge separation distance was found to increase by 5 times in a multilayer film structure where the gold nanoparticles face the porphyrin moiety of the dyad, that is, AuNP|PF, compared to the case of the PF layer alone. Films were assembled by the Langmuir-Blodgett (LB) method using octadecylamine (ODA) as the matrix compound. Atomic force microscopy (AFM) images of the monolayers revealed that AuNPs are arranged into continuous, islandlike structures and PF dyads form clusters. The porphyrin reference layer was assembled with the AuNP layer to gain insight on the interaction mechanism between porphyrin and gold nanoparticles. Interlayer electron transfer was also observed between the AuNPs and porphyrin reference, but the efficiency is lower than that in the AuNP|PF film. Fluorescence emission of the reference porphyrin is slightly quenched, and fluorescence decay becomes faster in the presence of AuNPs. The proposed mechanism for the electron transfer in the AuNP|PF film is thus the primary electron transfer from the porphyrin to the fullerene followed by a secondary hole transfer from the porphyrin to the AuNPs, resulting in an increased charge separation distance and enhanced photovoltage.
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Affiliation(s)
- Anne Kotiaho
- Institute of Materials Chemistry, Tampere University of Technology, P.O. Box 541, 33101 Tampere, Finland.
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27
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Salazar-Villanueva M, Hernandez Tejeda PH, Pal U, Rivas-Silva JF, Rodríguez Mora JI, Ascencio JA. Stable Tin (n = 2−15) Clusters and Their Geometries: DFT Calculations. J Phys Chem A 2006; 110:10274-8. [PMID: 16928118 DOI: 10.1021/jp061332e] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present a detailed structural analysis for small Tin (n = 2-15) clusters based on ab initio quantum mechanical calculations of their binding energies, frontier orbital gaps, and second energy derivatives. Local density approximation calculations revealed that while the smaller clusters (n < or = 8) prefer hexagonal atomic arrays with bulklike crystal symmetry, the bigger clusters prefer pentagonal atomic arrays. From the stability criteria of the magic number clusters we could identify three magic number clusters Ti7, Ti13, and Ti15. While the most stable configuration of Ti7 is a decahedral bipyramid induced by tetrahedral atomic arrays, the most stable configuration of Ti13 is an icosahedron. The other stable cluster Ti15 takes a closed-shell icosahedron-like configuration with both pentagonal and hexagonal symmetries. The stability of the Tin clusters strongly depends on their geometries and charge states. The HOMO-LUMO gap of the Tin clusters approaches its bulk value for n > 8. While there is not much difference between the HOMO and LUMO isosurface charge distributions for the Ti7 and Ti13 clusters in their most stable configurations, they are very different in the case of Ti15. Such a distinct charge distribution in Ti15 indicates its singular chemical selectivity over the other two magic number clusters.
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Ascencio JA, Liu HB, Pal U, Medina A, Wang ZL. Transmission electron microscopy and theoretical analysis of AuCu nanoparticles: Atomic distribution and dynamic behavior. Microsc Res Tech 2006; 69:522-30. [PMID: 16732542 DOI: 10.1002/jemt.20321] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Though the application of bimetallic nanoparticles is becoming increasingly important, the local atomistic structure of such alloyed particles, which is critical for tailoring their properties, is not yet very clearly understood. In this work, we present detailed study on the atomistic structure of Au-Cu nanoparticles so as to determine their most stable configurations and the conditions for obtaining clusters of different structural variants. The dynamic behavior of these nanoparticles upon local heating is investigated. AuCu nanoparticles are characterized by high resolution transmission electron microscopy (HRTEM) and energy filtering elemental composition mapping (EFECM), which allowed us to study the internal structure and the elemental distribution in the particles. Quantum mechanical approaches and classic molecular dynamics methods are applied to model the structure and to determine the lowest energy configurations, the corresponding electronic structures, and understand structural transition of clusters upon heating, supported by experimental evidences. Our theoretical results demonstrate only the core/shell bimetallic structure have negative heat of formation, both for decahedra and octahedral, and energetically favoring core/shell structure is with Au covering the core of Cu, whose reverse core/shell structure is not stable and may transform back at a certain temperature. Experimental evidences corroborate these structures and their structural changes upon heating, demonstrating the possibility to manipulate the structure of such bimetallic nanoparticles using extra stimulating energy, which is in accordance with the calculated coherence energy proportions between the different configurations.
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Affiliation(s)
- J A Ascencio
- Programa de Investigación y Desarrollo de Ductos, Instituto Mexicano del Petroleo, Eje Central Lázaro Cárdenas No. 152, Col. San Bartolo Atepehuacan, C.P.07730, Mexico D.F., Mexico.
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Lopez-Salido I, Lim DC, Dietsche R, Bertram N, Kim YD. Electronic and Geometric Properties of Au Nanoparticles on Highly Ordered Pyrolytic Graphite (HOPG) Studied Using X-ray Photoelectron Spectroscopy (XPS) and Scanning Tunneling Microscopy (STM). J Phys Chem B 2005; 110:1128-36. [PMID: 16471654 DOI: 10.1021/jp054790g] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Au nanoparticles grown on mildly sputtered Highly Ordered Pyrolytic Graphite (HOPG) surfaces were studied using Scanning Tunneling Microscopy (STM) and X-ray Photoelectron Spectroscopy (XPS). The results were compared with those of Ag nanoparticles on the same substrate. By varying the defect densities of HOPG and the Au coverages, one can create Au nanoparticles in various sizes. At high Au coverages, the structures of the Au films significantly deviate from the ideal truncated octahedral form: the existence of many steps between different Au atomic layers can be observed, most likely due to a high activation barrier of the diffusion of Au atoms across the step edges. This implies that the particle growth at room temperature is strongly limited by kinetic factors. Hexagonal shapes of Au structures could be identified, indicating preferential growth of Au nanostructures along the (111) direction normal to the surface. In the case of Au, XPS studies reveal a weaker core level shift with decreasing particle size compared to the 3d level in similarly sized Ag particles. Also taking into account the Auger analysis of the Ag particles, the core level shifts of the metal nanoparticles on HOPG can be understood in terms of the metal/substrate charge transfer. Ag is (partially) positively charged, whereas Au negatively charged on HOPG. It is demonstrated that XPS can be a useful tool to study metal-support interactions, which plays an important role for heterogeneous catalysis, for example.
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Torma V, Vidoni O, Simon U, Schmid G. Charge-Transfer Mechanisms between Gold Clusters. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200390143] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
Properties of materials determined by their size are indeed fascinating and form the basis of the emerging area of nanoscience. In this article, we examine the size dependent electronic structure and properties of nanocrystals of semiconductors and metals to illustrate this aspect. We then discuss the chemical reactivity of metal nanocrystals which is strongly dependent on the size not only because of the large surface area but also a result of the significantly different electronic structure of the small nanocrystals. Nanoscale catalysis of gold exemplifies this feature. Size also plays a role in the assembly of nanocrystals into crystalline arrays. While we owe the beginnings of size-dependent chemistry to the early studies of colloids, recent findings have added a new dimension to the subject.
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Affiliation(s)
- C N R Rao
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Center for Advanced Scientific Research, Bangalore, India.
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Ramirez-Cuesta A, Bennett R, Stone P, Mitchell P, Bowker M. STM investigation and Monte-Carlo modelling of spillover in a supported metal catalyst. ACTA ACUST UNITED AC 2001. [DOI: 10.1016/s1381-1169(00)00504-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Thomas P, Kulkarni G, Rao C. Effect of size on the Coulomb staircase phenomenon in metal nanocrystals. Chem Phys Lett 2000. [DOI: 10.1016/s0009-2614(00)00305-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Alonso JA. Electronic and atomic structure, and magnetism of transition-metal clusters. Chem Rev 2000; 100:637-78. [PMID: 11749247 DOI: 10.1021/cr980391o] [Citation(s) in RCA: 273] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J A Alonso
- Departamento de Física Teórica, Universidad de Valladolid, 47011 Valladolid, Spain
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