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Paul F, Paul S. To Be or Not to Be - Review of Electrical Bistability Mechanisms in Polymer Memory Devices. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2106442. [PMID: 35132772 DOI: 10.1002/smll.202106442] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/24/2021] [Indexed: 06/14/2023]
Abstract
Organic memory devices are a rapidly evolving field with much improvement in device performance, fabrication, and application. But the reports have been disparate in terms of the material behavior and the switching mechanisms in the devices. And, despite the advantages, the lack of agreement in regards to the switching behavior of the memory devices is the biggest challenge that the field must overcome to mature as a commercial competitor. This lack of consensus has been the motivation of this work wherein various works are compiled together to understand influencing factors in the memory devices. Different works are compared together to discover some clues about the nature of the switching occurring in the devices, along with some missing links that would require further investigation. The charge storage mechanism is critically analyzed alongside the various resistive switching mechanisms such as filamentary conduction, redox-based switching, metal oxide switching, and other proposed mechanisms. The factors that affect the switching process are also analyzed including the effect of nanoparticles, the effect of the choice of polymer, or even the effect of electrodes on the switching behavior and the performance parameters of the memory device.
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Affiliation(s)
- Febin Paul
- Emerging Technologies Research Centre, De Montfort University, The Gateway, Leicester, LE1 9BH, UK
| | - Shashi Paul
- Emerging Technologies Research Centre, De Montfort University, The Gateway, Leicester, LE1 9BH, UK
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2
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Ko Y, Kwon CH, Lee SW, Cho J. Nanoparticle-Based Electrodes with High Charge Transfer Efficiency through Ligand Exchange Layer-by-Layer Assembly. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001924. [PMID: 32954530 DOI: 10.1002/adma.202001924] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/02/2020] [Indexed: 06/11/2023]
Abstract
Organic-ligand-based solution processes of metal and transition metal oxide (TMO) nanoparticles (NPs) have been widely studied for the preparation of electrode materials with desired electrical and electrochemical properties for various energy devices. However, the ligands adsorbed on NPs have a significant effect on the intrinsic properties of materials, thus influencing the performance of bulk electrodes assembled by NPs for energy devices. To resolve these critical drawbacks, numerous approaches have focused on developing unique surface chemistry that can exchange bulky ligands with small ligands or remove bulky ligands from NPs after NP deposition. In particular, recent studies have reported that the ligand-exchange-induced layer-by-layer (LE-LbL) assembly of NPs enables controlled assembly of NPs with the desired interparticle distance, and interfaces, dramatically improving the electrical/electrochemical performance of electrodes. This emerging approach also demonstrates that efficient surface ligand engineering can exploit the unique electrochemical properties of individual NPs and maximize the electrochemical performance of the resultant NP-assembled electrodes through improved charge transfer efficiency. This report focuses on how LE-LbL assembly can be effectively applied to NP-based energy storage/conversion electrodes. First, the basic principles of the LE-LbL approach are introduced and then recent progress on NP-based energy electrodes prepared via the LE-LbL approach is reviewed.
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Affiliation(s)
- Yongmin Ko
- Department of Chemical & Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
- Division of Energy Technology, Materials Research Institute, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 333 Techno Jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu, 42988, Republic of Korea
| | - Cheong Hoon Kwon
- Department of Chemical & Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
| | - Seung Woo Lee
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332-0245, USA
| | - Jinhan Cho
- Department of Chemical & Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul, 02841, Republic of Korea
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3
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Benyettou F, Ramdas Nair A, Dho Y, Prakasam T, Pasricha R, Whelan J, Traboulsi H, Mazher J, Sadler KC, Trabolsi A. Aqueous Synthesis of Triphenylphosphine‐Modified Gold Nanoparticles for Synergistic In Vitro and In Vivo Photothermal Chemotherapy. Chemistry 2020; 26:5270-5279. [DOI: 10.1002/chem.202000216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Indexed: 01/02/2023]
Affiliation(s)
- Farah Benyettou
- New York University Abu Dhabi PO Box 129188, Saadiyat Island Abu Dhabi United Arab Emirates
| | - Anjana Ramdas Nair
- New York University Abu Dhabi PO Box 129188, Saadiyat Island Abu Dhabi United Arab Emirates
| | - Yaereen Dho
- New York University Abu Dhabi PO Box 129188, Saadiyat Island Abu Dhabi United Arab Emirates
| | - Thirumurugan Prakasam
- New York University Abu Dhabi PO Box 129188, Saadiyat Island Abu Dhabi United Arab Emirates
| | - Renu Pasricha
- New York University Abu Dhabi PO Box 129188, Saadiyat Island Abu Dhabi United Arab Emirates
| | - Jamie Whelan
- New York University Abu Dhabi PO Box 129188, Saadiyat Island Abu Dhabi United Arab Emirates
| | - Hassan Traboulsi
- Department of ChemistryKing Faisal University Al-Ahsa 31982 Kingdom of Saudi Arabia
| | - Javed Mazher
- Department of PhysicsKing Faisal University Al-Ahsa 31982 Kingdom of Saudi Arabia
| | - Kirsten C. Sadler
- New York University Abu Dhabi PO Box 129188, Saadiyat Island Abu Dhabi United Arab Emirates
| | - Ali Trabolsi
- New York University Abu Dhabi PO Box 129188, Saadiyat Island Abu Dhabi United Arab Emirates
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4
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Sengupta T, Chung JS, Kang SG. Account of chemical bonding and enhanced reactivity of vanadium-doped rhodium clusters toward C–H activation: a DFT investigation. Phys Chem Chem Phys 2019; 21:9935-9948. [DOI: 10.1039/c9cp00444k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The chemical bonding and enhanced reactivity of vanadium-doped rhodium clusters toward C–H activation were investigated using DFT.
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Affiliation(s)
- Turbasu Sengupta
- School of Chemical Engineering
- University of Ulsan
- Ulsan 44610
- South Korea
| | - Jin Suk Chung
- School of Chemical Engineering
- University of Ulsan
- Ulsan 44610
- South Korea
| | - Sung Gu Kang
- School of Chemical Engineering
- University of Ulsan
- Ulsan 44610
- South Korea
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5
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Lee YG, Liao BX, Weng YC. Ascorbic acid sensor using a PVA/laccase-Au-NPs/Pt electrode. RSC Adv 2018; 8:37872-37879. [PMID: 35558589 PMCID: PMC9089397 DOI: 10.1039/c8ra06280c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Accepted: 10/30/2018] [Indexed: 11/21/2022] Open
Abstract
A surface-modified electrode, PVA/laccase-Au-NPs/Pt, was prepared to sense ascorbic acid (H2A) in this study.
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Affiliation(s)
- Yuan-Gee Lee
- Department of Automation Engineer
- Institute of Mechatronoptic Systems
- Chienkuo
- Technology University
- Taiwan
| | - Bo-Xuan Liao
- Department of Chemical Engineering
- Feng Chia University
- Taichung
- Taiwan
| | - Yu-Ching Weng
- Department of Chemical Engineering
- Feng Chia University
- Taichung
- Taiwan
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6
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Ranjan P, Chakraborty T, Kumar A. Computational Investigation of Cationic, Anionic and Neutral Ag2AuN (N = 1–7) Nanoalloy Clusters. PHYSICAL SCIENCES REVIEWS 2017. [DOI: 10.1515/psr-2016-0112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe study of bimetallic nanoalloy clusters is of immense importance due to their diverse applications in the field of science and engineering. A deep theoretical insight is required to explain the physico-chemical properties of such compounds. Among such nanoalloy clusters, the compound formed between Ag and Au has received a lot of attention because of their marked electronic, catalytic, optical and magnetic properties. Density Functional Theory (DFT) is one of the most successful approaches of quantum mechanics to study the electronic properties of materials. Conceptual DFT-based descriptors have turned to be indispensable tools for analysing and correlating the experimental properties of compounds. In this report, we have investigated the ground state configurations and physico-chemical properties of Ag2AuNλ(N= 1–7,λ=±1, 0) nanoalloy clusters invoking DFT methodology. Our computed data exhibits interesting odd-even oscillation behaviour. A close agreement between experimental and our computed bond length supports our theoretical analysis.
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7
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Balavijayalakshmi J, Ramalakshmi V. Carica papaya peel mediated synthesis of silver nanoparticles and its antibacterial activity against human pathogens. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.jart.2017.03.010] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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8
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Yu X, Malvankar N, Landis R, Eymur S, Miranda OR, Rotello VM. Impedance Spectroscopy of Ionic Ligand-Modulated Charge Transport of Gold Nanoparticle Films. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:3814-3821. [PMID: 25919594 DOI: 10.1002/smll.201500127] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 03/20/2015] [Indexed: 06/04/2023]
Abstract
Assembled monolayer-protected nanoparticles (NPs) possess unique electrical properties that are determined by the coupled effects of their nano-sized electroactive inorganic cores that are capable of donating and accepting electrons and the organic shells. Core and ligand engineering for NP conductance modulation has been extensively explored; however, most studies focus on electron transport and not the interplay between the ion and electron transport processes. It is demonstrated here that electronic- and ionic-conducting properties of nanoparticle assemblies can be controlled by engineering the charge and flexibility of the ligand shell. By using impedance spectroscopy, the electronic, mixed ionic and electronic, and responsive conductance of the nanoparticle film and structure-function correlation are systematically investigated, and this correlation is used to provide a prototype volatile gas sensor based on the combined ionic and electronic conductance behavior of ionic ligand-functionalized gold NPs.
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Affiliation(s)
- Xi Yu
- Department of Chemistry, University of Massachusetts, 710 North Pleasant St., Amherst, MA, 01003, USA
| | - Nikhil Malvankar
- Department of Physics, University of Massachusetts, 710 North Pleasant St., Amherst, MA, 01003, USA
| | - Ryan Landis
- Department of Chemistry, University of Massachusetts, 710 North Pleasant St., Amherst, MA, 01003, USA
| | - Serkan Eymur
- Department of Energy Systems Engineering, Giresun University, 28200, Giresun, Turkey
| | - Oscar R Miranda
- Department of Chemistry, University of Massachusetts, 710 North Pleasant St., Amherst, MA, 01003, USA
| | - Vincent M Rotello
- Department of Chemistry, University of Massachusetts, 710 North Pleasant St., Amherst, MA, 01003, USA
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9
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Okram GS, Singh J, Kaurav N, Lalla NP. Trioctylphosphine as self-assembly inducer. Faraday Discuss 2015; 181:211-23. [DOI: 10.1039/c4fd00248b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nickel nanoparticles (NPs) of different shapes and sizes in polydispersed as well as monodispersed forms were synthesized using trioctylphosphine (TOP), triphenylphosphine (TPP), oleylamine (OA) and their combinations as surfactants to study their self-assembly inducing capabilities. Randomly agglomerated polydispersed NPs were found for TPP and OA, and TPP or OA separately. However, in consolidation with the earlier report of Singh et al., J. Mater. Chem. C, 2014, 2, 8918, NPs formed using TOP only and a combination of TOP with OA naturally exhibited monodispersed NPs associated with natural nanolattice formation without any other external force or surfactants, demonstrating clearly the self-inducing capacity of TOP into monodispersed NPs and their self-assembled nanolattices. Fourier-transformed infra-red (FTIR) data clearly indicated the capping of these surfactants along with acetylacetonate ligands from nickel acetylacetonate precursor on the surface of the NPs. Remarkably, the narrowest zeta potential (ζ) base-widths were observed for samples possessing a self-assembled nanolattice, compared to the broader ones for randomly agglomerated particles.
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Affiliation(s)
| | | | - Netram Kaurav
- Department of Physics
- Government Holkar Science College
- Indore
- India
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10
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Copp S, Schultz D, Swasey S, Pavlovich J, Debord M, Chiu A, Olsson K, Gwinn E. Magic Numbers in DNA-Stabilized Fluorescent Silver Clusters Lead to Magic Colors. J Phys Chem Lett 2014; 5:959-963. [PMID: 24803994 PMCID: PMC3985885 DOI: 10.1021/jz500146q] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 02/27/2014] [Indexed: 05/19/2023]
Abstract
DNA-stabilized silver clusters are remarkable for the selection of fluorescence color by the sequence of the stabilizing DNA oligomer. Yet despite a growing number of applications that exploit this property, no large-scale studies have probed origins of cluster color or whether certain colors occur more frequently than others. Here we employ a set of 684 randomly chosen 10-base oligomers to address these questions. Rather than a flat distribution, we find that specific color bands dominate. Cluster size data indicate that these "magic colors" originate from the existence of magic numbers for DNA-stabilized silver clusters, which differ from those of spheroidal gold clusters stabilized by small-molecule ligands. Elongated cluster structures, enforced by multiple base ligands along the DNA, can account for both magic number sizes and color variation around peak wavelength populations.
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Affiliation(s)
- Stacy
M. Copp
- Physics
Department, University of California Santa
Barbara, Santa Barbara California 93117, United States
| | - Danielle Schultz
- Chemistry
Department, University of California Santa
Barbara, Santa Barbara California 93117, United States
| | - Steven Swasey
- Chemistry
Department, University of California Santa
Barbara, Santa Barbara California 93117, United States
| | - James Pavlovich
- Chemistry
Department, University of California Santa
Barbara, Santa Barbara California 93117, United States
| | - Mark Debord
- Physics
Department, University of California Santa
Barbara, Santa Barbara California 93117, United States
| | - Alexander Chiu
- Physics
Department, University of California Santa
Barbara, Santa Barbara California 93117, United States
| | - Kevin Olsson
- Physics
Department, University of California Santa
Barbara, Santa Barbara California 93117, United States
| | - Elisabeth Gwinn
- Physics
Department, University of California Santa
Barbara, Santa Barbara California 93117, United States
- E-mail:
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11
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Lee WY, Hostetler MJ, Murray RW, Majda M. Electron Hopping and Electronic Conductivity in Monolayers of Alkanethiol-Stabilized Gold Nano-Clusters at the Air/Water Interface. Isr J Chem 2013. [DOI: 10.1002/ijch.199700025] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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12
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Room temperature radiolytic synthesized Cu@CuAlO(2)-Al(2)O(3) nanoparticles. Int J Mol Sci 2012; 13:11941-11953. [PMID: 23109893 PMCID: PMC3472785 DOI: 10.3390/ijms130911941] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2012] [Revised: 09/02/2012] [Accepted: 09/09/2012] [Indexed: 11/23/2022] Open
Abstract
Colloidal Cu@CuAlO2-Al2O3 bimetallic nanoparticles were prepared by a gamma irradiation method in an aqueous system in the presence of polyvinyl pyrrolidone (PVP) and isopropanol respectively as a colloidal stabilizer and scavenger of hydrogen and hydroxyl radicals. The gamma irradiation was carried out in a 60Co gamma source chamber with different doses up to 120 kGy. The formation of Cu@CuAlO2-Al2O3 nanoparticles was observed initially by the change in color of the colloidal samples from colorless to brown. Fourier transform infrared spectroscopy (FTIR) confirmed the presence of bonds between polymer chains and the metal surface at all radiation doses. Results of transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDX), and X-ray diffraction (XRD) showed that Cu@CuAlO2-Al2O3 nanoparticles are in a core-shell structure. By controlling the absorbed dose and precursor concentration, nanoclusters with different particle sizes were obtained. The average particle diameter increased with increased precursor concentration and decreased with increased dose. This is due to the competition between nucleation, growth, and aggregation processes in the formation of nanoclusters during irradiation.
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13
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Gao F, Goodman DW. Model Catalysts: Simulating the Complexities of Heterogeneous Catalysts. Annu Rev Phys Chem 2012; 63:265-86. [DOI: 10.1146/annurev-physchem-032511-143722] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Feng Gao
- Chemical and Materials Science Division, Pacific Northwest National Laboratory, Richland, Washington 99352;
| | - D. Wayne Goodman
- Department of Chemistry, Texas A&M University, College Station, Texas 77842-3012
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14
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Liu Z, Xing Z, Zu Y, Tan S, Zhao L, Zhou Z, Sun T. Synthesis and characterization of L-histidine capped silver nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012. [DOI: 10.1016/j.msec.2012.01.031] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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15
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Shen J, Liu J, Gao Y, Cao D, Zhang L. Revisiting the dispersion mechanism of grafted nanoparticles in polymer matrix: a detailed molecular dynamics simulation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:15213-15222. [PMID: 22040300 DOI: 10.1021/la203182u] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
By focusing on the grafted nanoparticles (NPs) embedded in polymer melts, a detailed coarse-grained molecular dynamics simulation is adopted to investigate the effects of the grafting density, the length of the matrix and grafted chains on the dispersion of the NPs. We have employed visualization snapshots, radial distribution functions (RDFs), the interaction energy between NPs, the number of neighbor NPs, and the conformation of the brush chains to clearly analyze the dispersion state of the grafted NPs. Our simulated results generally indicate that the dispersion of the NPs is controlled by both the excluded volume of the grafted NPs and the interface between the brushes and the matrix. It is found that increasing grafting density or grafted chain length leads to better dispersion, owing to larger excluded volume; however, increasing the length of the matrix chains leads to aggregation of NPs, attributed to both a progressive loss of the interface between the brushes and the matrix and the overlap between brushes of different NPs, intrinsically driven by entropy. Meanwhile, it is found that there exists an optimum grafting density (σ(c)) for the dispersion of the NPs, which roughly obeys the following mathematical relation: σ(c) is proportional to N(m)(K)/N(g)(L), where K, L > 0 and N(m) and N(g) represent the length of the matrix and grafted chain length, respectively. Considering the practical situation that the grafted brushes and the matrix polymer are mostly not chemically identical, we also studied the effect of the compatibility between the brushes and the matrix polymer by taking into account the attraction between the grafted chains and the matrix chains. In general, our comprehensive simulation results are believed to guide the design and preparation of high-performance polymer nanocomposites with good or even tailored dispersion of NPs.
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Affiliation(s)
- Jianxiang Shen
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, PR China
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16
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Roskov KE, Kozek KA, Wu WC, Chhetri RK, Oldenburg AL, Spontak RJ, Tracy JB. Long-range alignment of gold nanorods in electrospun polymer nano/microfibers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:13965-9. [PMID: 21834540 DOI: 10.1021/la2021066] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In this study, a scalable fabrication technique for controlling and maintaining the nanoscale orientation of gold nanorods (GNRs) with long-range macroscale order has been achieved through electrospinning. The volume fraction of GNRs with an average aspect ratio of 3.1 is varied from 0.006 to 0.045 in aqueous poly(ethylene oxide) solutions to generate electrospun fibers possessing different GNR concentrations and measuring 40-3000 nm in diameter. The GNRs within these fibers exhibit excellent alignment with their longitudinal axis parallel to the fiber axis n. According to microscopy analysis, the average deviant angle between the GNR axis and n increases modestly from 3.8 to 13.3° as the fiber diameter increases. Complementary electron diffraction measurements confirm preferred orientation of the {100} GNR planes. Optical absorbance spectroscopy measurements reveal that the longitudinal surface plasmon resonance bands of the aligned GNRs depend on the polarization angle and that maximum extinction occurs when the polarization is parallel to n.
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Affiliation(s)
- Kristen E Roskov
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, USA
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17
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Sandhyarani N, Pradeep T. Current understanding of the structure, phase transitions and dynamics of self-assembled monolayers on two- and three-dimensional surfaces. INT REV PHYS CHEM 2010. [DOI: 10.1080/0144235031000069705] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- N. Sandhyarani
- a Department of Chemistry and Regional Sophisticated Instrumentation Centre , Indian Institute of Technology Madras , Chennai , 600 036 , India
| | - T. Pradeep
- a Department of Chemistry and Regional Sophisticated Instrumentation Centre , Indian Institute of Technology Madras , Chennai , 600 036 , India
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18
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Koszinowski K, Ballweg K. A highly charged Ag(6)(4+) core in a DNA-encapsulated silver nanocluster. Chemistry 2010; 16:3285-90. [PMID: 20169599 DOI: 10.1002/chem.200902743] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Konrad Koszinowski
- Department Chemie und Biochemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13, 81377 München, Germany.
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19
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Gregor C, Hermanek M, Jancik D, Pechousek J, Filip J, Hrbac J, Zboril R. The Effect of Surface Area and Crystal Structure on the Catalytic Efficiency of Iron(III) Oxide Nanoparticles in Hydrogen Peroxide Decomposition. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200901066] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Homberger M, Simon U. On the application potential of gold nanoparticles in nanoelectronics and biomedicine. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2010; 368:1405-53. [PMID: 20156830 DOI: 10.1098/rsta.2009.0275] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Ligand-stabilized gold nanoparticles (AuNPs) are of high interest to research dedicated to future technologies such as nanoelectronics or biomedical applications. This research interest arises from the unique size-dependent properties such as surface plasmon resonance or Coulomb charging effects. It is shown here how the unique properties of individual AuNPs and AuNP assemblies can be used to create new functional materials for applications in a technical or biological environment. While the term technical environment focuses on the potential use of AuNPs as subunits in nanoelectronic devices, the term biological environment addresses issues of toxicity and novel concepts of controlling biomolecular reactions on the surface of AuNPs.
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Affiliation(s)
- Melanie Homberger
- Institute of Inorganic Chemistry and JARA-FIT, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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21
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Quantised double layer charging of monolayer-protected clusters in a room temperature ionic liquid. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.02.051] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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22
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Periyasamy G, Remacle F. Ligand and solvation effects on the electronic properties of Au55 clusters: a density functional theory study. NANO LETTERS 2009; 9:3007-3011. [PMID: 19583247 DOI: 10.1021/nl901430k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The electronic properties of the neutral, positively and negatively charged bare Au(55), passivated Au(55)(PH(3))(12), Au(55)(PH(3))(12)Cl(6), and solvated Au(55)(PH(3))(12)Cl(6) 54 H(2)O clusters are studied using density functional theory. The presence of Cl atoms in the ligand shell favors a nonmetallic behavior while a more metallic behavior is induced by explicit solvation of Au(55)(PH(3))(12)Cl(6) with water molecules. The trends observed in the electronic properties upon ligation and solvation are in agreement with experimental studies.
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Affiliation(s)
- Ganga Periyasamy
- Department of Chemistry, B6c, University of Liege, B-4000 Liège, Belgium
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23
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Lokesh KS, Shivaraj Y, Dayananda BP, Chandra S. Synthesis of phthalocyanine stabilized rhodium nanoparticles and their application in biosensing of cytochrome c. Bioelectrochemistry 2009; 75:104-9. [PMID: 19303822 DOI: 10.1016/j.bioelechem.2009.02.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Revised: 01/12/2009] [Accepted: 02/16/2009] [Indexed: 11/26/2022]
Abstract
A single step synthesis route is described for the preparation of rhodium nanoparticles using a cobalt aminophthalocyanine macrocyclic complex as a stabilizer. The results of nanoparticles characterization using electronic absorption, Raman and X-ray spectroscopes as well as transmission electron microscopy are reported. Rhodium nanoparticle modified electrode behavior as examined by cyclic and differential pulse voltammetry is also provided. The nanoparticles were found to be well dispersed and stabilized throughout the macromolecular matrix. TEM studies showed that they have an average diameter of 3 to 5 nm with spherical shape. The colloidal rhodium was then used for electrochemical sensing of cytochrome c using glassy carbon electrode. The results showed that the colloidal rhodium nanoparticles enhanced the electron transfer process between cytochrome c and the electrode. Differential pulse voltammetric measurements of cytochrome c at the colloidal rhodium nanoparticles modified glassy carbon electrode showed a linear relationship with the oxidation peak currents in the concentration range of 100 nM to 3 microM of cytochrome c.
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Affiliation(s)
- K S Lokesh
- Govt. Science College, Hassan, Karnataka, India.
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24
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Fukuhara M, Abe H, Nishikawa H, Takemoto T, Xie G, Inoue A. Amorphous/crystalline transition of copper at room-temperature. Chem Phys Lett 2009. [DOI: 10.1016/j.cplett.2008.12.100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Lee S, Cummins MD, Willing GA, Firestone MA. Conductivity of ionic liquid-derived polymers with internal gold nanoparticle conduits. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b910059h] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Fischler M, Homberger M, Simon U. DNA-Mediated Assembly of Metal Nanoparticles: Fabrication, Structural Features, and Electrical Properties. ACTA ACUST UNITED AC 2009. [DOI: 10.1007/978-0-387-09459-5_2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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27
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Tripathy SK. Soft-chemical synthesis and photoluminescence studies of poly-(vinyl) alcohol-stabilized (Ag)N±10(N=82–3049) nanoclusters. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Foos EE, Twigg ME, Snow AW, Ancona MG. Competition Between Thiol and Phosphine Ligands During the Synthesis of Au Nanoclusters. J CLUST SCI 2008. [DOI: 10.1007/s10876-008-0205-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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29
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Huc V, Pelzer K. A new specifically designed calix[8]arene for the synthesis of functionalized, nanometric and subnanometric Pd, Pt and Ru nanoparticles. J Colloid Interface Sci 2008; 318:1-4. [PMID: 17905260 DOI: 10.1016/j.jcis.2007.07.083] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2007] [Revised: 07/16/2007] [Accepted: 07/31/2007] [Indexed: 10/22/2022]
Abstract
A new thioester functionalized calix[8]arene derivative is used for the synthesis of metallic Pd, Pt and Ru nanoparticles, exhibiting several interesting features such as stability and remarkable surface functionalization. Crystalline particles of very small dimensions and good dispersion have been obtained.
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Affiliation(s)
- Vincent Huc
- Université de Paris-Sud, ICMMO, Bâtiment 420, 15 rue Georges Clémenceau, 91440 Orsay, France
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31
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Chou CW, Hsu SH, Wang PH. Biostability and biocompatibility of poly(ether)urethane containing gold or silver nanoparticles in a porcine model. J Biomed Mater Res A 2008; 84:785-94. [PMID: 17635027 DOI: 10.1002/jbm.a.31387] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Nanocomposites from polyether-type waterborne polyurethane (PU) incorporated with different amounts of gold nanoparticles (17.4-65 ppm) or silver nanoparticles (30.2-113 ppm) were prepared. Specifically, the nanocomposite containing 43.5 ppm of gold or 30.2 ppm of silver was previously found to possess the best thermal and mechanical properties. The enhanced biostability of the nanocomposite at the specific nanoparticle content was also observed in subcutaneous rats. The latter was probably related to the free radical scavenging ability of the nanocomposite shown in vitro. In this study, the in vivo biostability of the full series of these nanocomposites was assessed by porcine subcutaneous implantation for 19 days followed by microscopic examination and chemical characterization using attenuated total reflectance-infrared spectroscopy (ATR-IR). The nanocomposite at 43.5 ppm of gold ("PU-Au 43.5 ppm") and that at 30.2 ppm of silver ("PU-Ag 30.2 ppm") exhibited superior biostability in pigs to those at higher or lower nanoparticle contents. In particular, evidence of oxidative chain scission and crosslinking of the surface was presented by ATR-IR spectra in the explanted PU and nanocomposites other than PU-Au 43.5 ppm and PU-Ag 30.2 ppm. The extent of biodegradation and that of foreign body reactions were highly associated in these nanocomposites, both of which showing negative correlation with the free radical scavenging ability. The interdependency among antioxidation/biostability/biocompatibility of PU was demonstrated in this porcine model.
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Affiliation(s)
- Chih-Wei Chou
- Department of Chemical Engineering, National Chung Hsing University, Taichung, Taiwan, Republic of China
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Wiley B, Sun Y, Mayers B, Xia Y. Shape-controlled synthesis of metal nanostructures: the case of silver. Chemistry 2006; 11:454-63. [PMID: 15565727 DOI: 10.1002/chem.200400927] [Citation(s) in RCA: 729] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The concept of shape-controlled synthesis is discussed by investigating the growth mechanisms for silver nanocubes, nanowires, and nanospheres produced through a polymer-mediated polyol process. Experimental parameters, such as the concentration of AgNO(3) (the precursor to silver), the molar ratio between poly(vinylpyrrolidone) (PVP, the capping agent) and AgNO(3), and the strength of chemical interaction between PVP and various crystallographic planes of silver, were found to determine the crystallinity of seeds (e.g., single crystal versus decahedral multiply twinned particles). In turn, the crystallinity of a seed and the extent of the PVP coverage on the seed were both instrumental in controlling the morphology of final product. The ability to generate silver nanostructures with well-defined morphologies provides a great opportunity to experimentally and systematically study the relationship between their properties and geometric shapes.
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Affiliation(s)
- Benjamin Wiley
- Department of Chemistry, University of Washington, Seattle, Washington 98195, USA
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34
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Xu C, van Zalinge H, Pearson JL, Glidle A, Cooper JM, Cumming DRS, Haiss W, Yao J, Schiffrin DJ, Proupín-Pérez M, Cosstick R, Nichols RJ. A combined top-down bottom-up approach for introducing nanoparticle networks into nanoelectrode gaps. NANOTECHNOLOGY 2006; 17:3333-3339. [PMID: 19661573 DOI: 10.1088/0957-4484/17/14/001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report here on the fabrication of a three-dimensional array of nanoparticles which bridges the gap between lithographically defined gold electrode contacts separated by 20 nm. The nanoparticle assemblies are formed from about 5 nm gold nanoparticles and benzenedimethanethiol (BDMT) bridging ligands. These assemblies are introduced between the contacts using a layer-by-layer protocol with successive BDMT self-assembly being followed by nanoparticle adsorption until the gap is bridged. The temperature dependent electrical properties of these devices are analysed to establish whether they are consistent with the notion that the networks are built up from molecularly interlinked discrete gold nanoparticles. To aid this analysis the molecular conductance of single bridging molecules is also characterized at room temperature using a recently introduced method based on the scanning tunnelling microscope (STM). From these measurements it is concluded that the room temperature electrical properties of the nanostructured networks are limited by the small interparticle connectivity and the inherent resistance of the linker molecules.
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Affiliation(s)
- Cigang Xu
- Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow G12 8LT, UK
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Franke ME, Koplin TJ, Simon U. Metal and metal oxide nanoparticles in chemiresistors: does the nanoscale matter? SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2006; 2:36-50. [PMID: 17193551 DOI: 10.1002/smll.200500261] [Citation(s) in RCA: 421] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Sensor technology is one of the most important key technologies of the future with a constantly increasing number of applications, both in the industrial and in the private sectors. More and more gas sensors are used for the control of technical processes, in environment monitoring, healthcare, and automobiles. Consequently, the development of fast and sensitive gas sensors with small cross sensitivity is the subject of intense research, propelled by strategies based on nanoscience and -technology. Established systems can be improved and novel sensor concepts based on bottom-up approaches show that the sensor properties can be controlled by molecular design. This Review highlights the recent developments and reflects the impact of nanoscience on sensor technology.
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Affiliation(s)
- Marion E Franke
- RWTH Aachen, Institut für Anorganische Chemie, Landoltweg 1, 52054 Aachen, Germany
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36
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Wen F, Waldöfner N, Schmidt W, Angermund K, Bönnemann H, Modrow S, Zinoveva S, Modrow H, Hormes J, Beuermann L, Rudenkiy S, Maus‐Friedrichs W, Kempter V, Vad T, Haubold H. Formation and Characterization of Pt Nanoparticle Networks. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200500446] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Fei Wen
- Max‐Planck‐Institut für Kohlenforschung, Kaiser‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Norbert Waldöfner
- Max‐Planck‐Institut für Kohlenforschung, Kaiser‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Wolfgang Schmidt
- Max‐Planck‐Institut für Kohlenforschung, Kaiser‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Klaus Angermund
- Max‐Planck‐Institut für Kohlenforschung, Kaiser‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Helmut Bönnemann
- Max‐Planck‐Institut für Kohlenforschung, Kaiser‐Wilhelm‐Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Stephanie Modrow
- Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn, Germany
| | - Svetlana Zinoveva
- Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn, Germany
| | - Hartwig Modrow
- Physikalisches Institut der Universität Bonn, Nussallee 12, 53115 Bonn, Germany
| | - Josef Hormes
- Center for Advanced Microstructures and Devices, 6980 Jefferson Hwy, Baton Rouge, LA 70806, USA
| | - Lars Beuermann
- Institut für Physik und Physikalische Technologien, Technische Universität Clausthal Leibnizstraße 4, 38678 Clausthal‐Zellerfeld
| | - Sergiy Rudenkiy
- Institut für Physik und Physikalische Technologien, Technische Universität Clausthal Leibnizstraße 4, 38678 Clausthal‐Zellerfeld
| | - Wolfgang Maus‐Friedrichs
- Institut für Physik und Physikalische Technologien, Technische Universität Clausthal Leibnizstraße 4, 38678 Clausthal‐Zellerfeld
| | - Volker Kempter
- Institut für Physik und Physikalische Technologien, Technische Universität Clausthal Leibnizstraße 4, 38678 Clausthal‐Zellerfeld
| | - Thomas Vad
- Forschungszentrum Jülich, Institut für Festkörperforschung, 52425 Jülich
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Affiliation(s)
- Christof M. Niemeyer
- Universität Dortmund, Fachbereich Chemie, Biologisch‐Chemische Mikrostrukturtechnik, Otto‐Hahn Str. 6, 44227 Dortmund, Fax: +49‐231‐755‐7082
| | - Ulrich Simon
- Institut für Anorganische Chemie, RWTH Aachen, Landoltweg 1, 52056 Aachen, Germany, Fax: +49‐241‐80‐99003
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38
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Neumeier S, Reuter T, Schmid G. The Electronic Interaction Between Au55(PPh3)12Cl6 Monolayers Through SiO2 Films. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200500384] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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Reuter T, Neumeier S, Schmid G, Koplin E, Simon U. Generation and Characterization of Multilayer Systems Consisting of Au55(PPh3)12Cl6 Double Layers and SiO2 Barrier Films. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200500385] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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40
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Endo T, Yoshimura T, Esumi K. Synthesis and catalytic activity of gold–silver binary nanoparticles stabilized by PAMAM dendrimer. J Colloid Interface Sci 2005; 286:602-9. [PMID: 15897077 DOI: 10.1016/j.jcis.2005.01.057] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2004] [Accepted: 01/21/2005] [Indexed: 10/25/2022]
Abstract
Gold-silver binary nanoparticles, which feed atomic ratios of gold to silver were 3:1, 1:1, and 1:3, were prepared. These particles were stabilized by amine-terminated (generation (G) 3.0 and 5.0) and carboxyl-terminated (G 3.5 and 5.5) poly(amidoamine) (PAMAM) dendrimers in water. UV-vis spectra indicate that the particles are not mere physical mixtures of monometallic particles or core/shell type but alloy. According to transmission electron microscope (TEM) observation, the mean diameters of the particles were 7-10 nm for silver particles and 3-4 nm for both gold and alloy particles, respectively. Catalytic activities for reduction of p-nitrophenol were investigated by monitoring the absorbance at 400 nm during the reaction. They were proportional to the feed ratio of gold in the particles and showed a maximum at the ratio of Au:Ag=3:1.
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Affiliation(s)
- Takeshi Endo
- Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan
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41
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Quinn AJ, Biancardo M, Floyd L, Belloni M, Ashton PR, Preece JA, Bignozzi CA, Redmond G. Analysis of charge transport in arrays of 28 kDa nanocrystal gold molecules. ACTA ACUST UNITED AC 2005. [DOI: 10.1039/b508404k] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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42
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Schmid G, Simon U. Gold nanoparticles: assembly and electrical properties in 1–3 dimensions. Chem Commun (Camb) 2005:697-710. [PMID: 15685311 DOI: 10.1039/b411696h] [Citation(s) in RCA: 261] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligand stabilized gold nanoparticles have attracted much attention in the search for new chemically designed compounds for a future information technology, based on single-electron devices. This article gives an overview about the strategies used to synthesize and to assemble uniform gold nanoparticles in different dimensions as well as about the present status of the electrical properties of these. Examples are given for three-dimensional organisations, for the formation of self-assembled monolayers as well as for one-dimensional assemblies.
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Affiliation(s)
- G Schmid
- Institute of Inorganic Chemistry, University of Essen, Essen, Germany.
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43
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Kotsilkova R, Nesheva D, Nedkov I, Krusteva E, Stavrev S. Rheological, electrical, and microwave properties of polymers with nanosized carbon particles. J Appl Polym Sci 2004. [DOI: 10.1002/app.20240] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Endo T, Yoshimura T, Esumi K. Voltammetric study of sodium hypochlorite using dendrimer-stabilized gold nanoparticles. J Colloid Interface Sci 2004; 269:364-9. [PMID: 14654397 DOI: 10.1016/s0021-9797(03)00674-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Electrochemical activity of dendrimer-stabilized gold nanoparticles on a glassy carbon electrode (GCE) was studied by means of cyclic voltammetry of sodium hypochlorite. Dendrimer-stabilized gold nanoparticles were deposited onto a glassy carbon surface by electrophoresis and the deposition was observed by transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Both anodic and cathodic peak currents were found to increase after the deposition of dendrimer-stabilized gold nanoparticles. In the case of dendrimers deposited onto the GCE surface, the magnitude of the current was smaller than for dendrimer-stabilized-gold-nanoparticle-modified GCE. This indicates the enhancement in the rate of electrolysis due to gold nanoparticles.
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Affiliation(s)
- Takeshi Endo
- Department of Applied Chemistry, Tokyo University of Science, Kagurazaka, Shinjuku-ku, 162-8601, Tokyo, Japan
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Lee JY, Yang J, Deivaraj TC, Too HP. A novel synthesis route for ethylenediamine-protected ruthenium nanoparticles. J Colloid Interface Sci 2003; 268:77-80. [PMID: 14611775 DOI: 10.1016/j.jcis.2003.07.036] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A novel method has been developed to prepare water-dispersible ethylenediamine (en)-stabilized ruthenium nanoparticles. The procedure involves the reduction of an en-RuCl(3) complex by sodium borohydride. The Ru nanoparticles so prepared are fairly stable in water. TEM imaging shows a mean diameter of about 2.1 nm for the particles and a narrow particle size distribution.
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Affiliation(s)
- Jim Yang Lee
- Department of Chemical and Environmental Engineering, National University of Singapore, 10, Kent Ridge Crescent, 119260, Singapore.
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Beuermann L, Maus-Friedrichs W, Krischok S, Kempter V, Bucher S, Modrow H, Hormes J, Waldöfner N, Bönnemann H. Characterization of aluminum-organic-stabilized platinum-colloid networks with electron and photon spectroscopies. Appl Organomet Chem 2003. [DOI: 10.1002/aoc.452] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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49
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50
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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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