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Siller-Ceniceros A, Almonte-Flores DC, Sánchez-Castro ME, Martínez-Guerra E, Rodríguez-Varela J, García Gómez NA, Morones-Ramírez JR. Ag-NP-Decorated Carbon Nanostructures: Synthesis, Characterization, and Antimicrobial Properties. ACS OMEGA 2024; 9:11562-11573. [PMID: 38497015 PMCID: PMC10938587 DOI: 10.1021/acsomega.3c08634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 03/19/2024]
Abstract
As the global urgency for effective antimicrobial agents intensifies, this work harnesses the widely demonstrated antimicrobial activity of silver nanoparticles (Ag-NPs) and proposes alternative synthesis approaches to metal-organic hybrid systems with antimicrobial activity. In this study, the proposed synthesis route involves decorating metallic nanoparticles into organic substrates without previous doping. The synthesis simultaneously uses polyethylene glycol for three crucial purposes: (1) acting as a mild reducing agent to generate Ag-NPs with a spherical shape and diameters ranging from 10 to just over 20 nm, (2) functioning as a dispersing agent for flakes of commercial nanostructured carbon supports, including reduced graphene oxide (rGO, ID-nano), and commercial carbon nanoplatelets from Sigma-Aldrich (GNPs, Sigma-Aldrich), and (3) serving as a promoter for the homogeneous anchoring of Ag-NPs in the carbon lattice without altering the conformation of the carbon lattice. This intricate interaction involves the π-orbitals from the sp2 hybridization honeycomb and the d-orbitals from the Ag-NPs, leading to the constructive rehybridization of rGO and GNPs. In our study, Ag-NPs/rGO are compared with a support lacking oxygenated groups in the lattice, such as commercial GNPs (Sigma-Aldrich), to produce Ag-NPs/GNPs. This comparison maintains constructive sp2 rehybridization, preserving the characteristic properties of rGO (ID-nano) and graphene nanoplatelets, including commercial GNPs (Sigma-Aldrich). Notably, oxygenated groups from rGO exhibit greater availability for exchanging oxo and hydroxy defects for Ag-NPs compared with GNPs (Sigma-Aldrich). The resulting Ag-NPs/rGO and Ag-NPs/GNP systems are thoroughly physicochemically characterized, employing techniques such as Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray diffraction, scanning electron microscopy and energy dispersive X-ray spectroscopy, high-resolution transmission electron microscopy, and scanning transmission electron microscopy, revealing the successful integration of Ag-NPs with minimal alteration to the carbon lattice. Subsequent antimicrobial evaluation against Escherichia coli (E. coli) demonstrates significant activity, with Ag-NPs/rGO and Ag-NPs/GNPs registering similar minimum inhibitory concentrations of 50 μg mL-1. This study underscores the potential of our metal-organic hybrid systems as antimicrobial agents and provides insights into the constructive rehybridization process, paving the way for diverse applications in the biomedical and environmental fields.
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Affiliation(s)
- Adriana
Angelina Siller-Ceniceros
- Facultad
de Ciencias Químicas (FCQ), Universidad
Autónoma de Nuevo León (UANL), Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo
León C.P. 66455, Mexico
- Centro
de Investigación en Biotecnología y Nanotecnología
CIByN-FCQ-UANL, Parque Industrial Innovación
Tecnológica, Alianza
sur 101, Apodaca, Nuevo León C.P. 66628, Mexico
| | - Dulce Carolina Almonte-Flores
- Facultad
de Ciencias Químicas (FCQ), Universidad
Autónoma de Nuevo León (UANL), Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo
León C.P. 66455, Mexico
- Centro
de Investigación en Biotecnología y Nanotecnología
CIByN-FCQ-UANL, Parque Industrial Innovación
Tecnológica, Alianza
sur 101, Apodaca, Nuevo León C.P. 66628, Mexico
| | - M. Esther Sánchez-Castro
- Nanociencias
y Nanotecnología, Cinvestav Unidad
Saltillo, Av. Industria
Metalúrgica 1062, Parque Industrial Ramos Arizpe, Ramos Arizpe, Coahuila C.P. 25900, Mexico
- Sustentabilidad
de los Recursos Naturales y Energía, Cinvestav Unidad Saltillo, Ramos
Arizpe 25900, Mexico
| | - Eduardo Martínez-Guerra
- Centro
de Investigación en Materiales Avanzados (CIMAV Unidad Monterrey), Alianza Norte 202, Parque Industrial
Innovación Tecnológica, Apodaca, Nuevo León C.P. 66600, Mexico
| | - Javier Rodríguez-Varela
- Nanociencias
y Nanotecnología, Cinvestav Unidad
Saltillo, Av. Industria
Metalúrgica 1062, Parque Industrial Ramos Arizpe, Ramos Arizpe, Coahuila C.P. 25900, Mexico
- Sustentabilidad
de los Recursos Naturales y Energía, Cinvestav Unidad Saltillo, Ramos
Arizpe 25900, Mexico
| | - Nora Aleyda García Gómez
- Facultad
de Ciencias Químicas (FCQ), Universidad
Autónoma de Nuevo León (UANL), Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo
León C.P. 66455, Mexico
- Centro
de Investigación en Biotecnología y Nanotecnología
CIByN-FCQ-UANL, Parque Industrial Innovación
Tecnológica, Alianza
sur 101, Apodaca, Nuevo León C.P. 66628, Mexico
| | - José Rubén Morones-Ramírez
- Facultad
de Ciencias Químicas (FCQ), Universidad
Autónoma de Nuevo León (UANL), Ave. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, Nuevo
León C.P. 66455, Mexico
- Centro
de Investigación en Biotecnología y Nanotecnología
CIByN-FCQ-UANL, Parque Industrial Innovación
Tecnológica, Alianza
sur 101, Apodaca, Nuevo León C.P. 66628, Mexico
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2
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Zhang N, Xiong G, Liu Z. Toxicity of metal-based nanoparticles: Challenges in the nano era. Front Bioeng Biotechnol 2022; 10:1001572. [PMID: 36619393 PMCID: PMC9822575 DOI: 10.3389/fbioe.2022.1001572] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 10/25/2022] [Indexed: 11/12/2022] Open
Abstract
With the rapid progress of nanotechnology, various nanoparticles (NPs) have been applicated in our daily life. In the field of nanotechnology, metal-based NPs are an important component of engineered NPs, including metal and metal oxide NPs, with a variety of biomedical applications. However, the unique physicochemical properties of metal-based NPs confer not only promising biological effects but also pose unexpected toxic threats to human body at the same time. For safer application of metal-based NPs in humans, we should have a comprehensive understanding of NP toxicity. In this review, we summarize our current knowledge about metal-based NPs, including the physicochemical properties affecting their toxicity, mechanisms of their toxicity, their toxicological assessment, the potential strategies to mitigate their toxicity and current status of regulatory movement on their toxicity. Hopefully, in the near future, through the convergence of related disciplines, the development of nanotoxicity research will be significantly promoted, thereby making the application of metal-based NPs in humans much safer.
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Affiliation(s)
- Naiding Zhang
- Department of Vascular Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Guiya Xiong
- Department of Science and Research, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhenjie Liu
- Department of Vascular Surgery, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China,*Correspondence: Zhenjie Liu,
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3
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Retout M, Mantri Y, Jin Z, Zhou J, Noël G, Donovan B, Yim W, Jokerst JV. Peptide-Induced Fractal Assembly of Silver Nanoparticles for Visual Detection of Disease Biomarkers. ACS NANO 2022; 16:6165-6175. [PMID: 35377141 PMCID: PMC9530071 DOI: 10.1021/acsnano.1c11643] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
We report the peptide-programmed fractal assembly of silver nanoparticles (AgNPs) in a diffusion-limited aggregation (DLA) mode, and this change in morphology generates a significant color change. We show that peptides with specific repetitions of defined amino acids (i.e., arginine, histidine, or phenylalanine) can induce assembly and coalescence of the AgNPs (20 nm) into a hyperbranched structure (AgFSs) (∼2 μm). The dynamic process of this assembly was systematically investigated, and the extinction of the nanostructures can be modulated from 400 to 600 nm by varying the peptide sequences and molar ratio. According to this rationale, two strategies of SARS-CoV-2 detection were investigated. The activity of the main protease (Mpro) involved in SARS-CoV-2 was validated with a peptide substrate that can bridge the AgNPs after the proteolytic cleavage. A sub-nanomolar limit of detection (0.5 nM) and the capacity to distinguish by the naked eye in a wide concentration range (1.25-30 nM) were achieved. Next, a multichannel sensor-array based on multiplex peptides that can visually distinguish SARS-CoV-2 proteases from influenza proteases in doped human samples was investigated.
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Affiliation(s)
| | | | | | | | - Grégoire Noël
- Functional and Evolutionary Entomology-Gembloux Agro-Bio Tech, University of Liège, 5030 Gembloux, Belgium
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4
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Gebruers M, Saha RA, Kubarev AV, Clinckemalie L, Liao Y, Debroye E, Weng B, Roeffaers MBJ. Optimized colloidal growth of hexagonal close-packed Ag microparticles and their stability under catalytic conditions. NEW J CHEM 2022. [DOI: 10.1039/d2nj02502g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The colloidal synthesis of hcp silver microparticles is optimized by tuning the chemical reduction kinetics and the surface stabilization during synthesis.
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Affiliation(s)
- Michaël Gebruers
- cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Rafikul A. Saha
- cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Alexey V. Kubarev
- cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Lotte Clinckemalie
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Yuhe Liao
- Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, No. 2, Nengyuan, Road, Tianhe District, Guangzhou 510640, P. R. China
| | - Elke Debroye
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Bo Weng
- cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Maarten B. J. Roeffaers
- cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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5
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Ten Brink GH, Zhu X, Guo W, Blauw K, Assink L, Svetovoy VB, Kooi BJ, Palasantzas G. Wetting of surfaces decorated by gas-phase synthesized silver nanoparticles: Effects of Ag adatoms, nanoparticle aging, and surface mobility. J Chem Phys 2021; 155:214701. [PMID: 34879663 DOI: 10.1063/5.0070497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The wetting state of surfaces can be rendered to a highly hydrophobic state by the deposition of hydrophilic gas phase synthesized Ag nanoparticles (NPs). The aging of Ag NPs leads to an increase in their size, which is also associated with the presence of Ag adatoms on the surface between the NPs that have a strong effect on the wetting processes. Furthermore, surface airborne hydrocarbons were removed by UV-ozone treatment, providing deeper insight into the apparent mobility of the NPs on different surfaces and their subsequent ripening and aging. In addition, the UV-ozone treatment revealed the presence of adatoms during the magnetron sputtering process. This surface treatment lowers the initial contact angle of the substrates and facilitates the mobility of Ag NPs and adatoms on the surface of substrates. Adatoms co-deposited on clean high surface energy substrates will nucleate on Ag NPs that will remain closely spherical and preserve the pinning effect due to the water nanomeniscus. If the adatoms are co-deposited on a UV-ozone cleaned low surface energy substrate, their mobility is restricted, and they will nucleate in two-dimensional islands and/or nanoclusters on the surface instead of connecting to existing Ag NPs. This growth results in a rough surface without overhangs, where the wetting state is reversed from hydrophobic to hydrophilic. Finally, different material surfaces of transmission electron microscopy grids revealed strong differences in the sticking coefficient for the Ag NPs, suggesting another factor that can strongly affect their wetting properties.
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Affiliation(s)
- Gert H Ten Brink
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Xiaotian Zhu
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Weiteng Guo
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - K Blauw
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - L Assink
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - V B Svetovoy
- A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospect 31 Bld. 4, 119071 Moscow, Russia
| | - Bart J Kooi
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - George Palasantzas
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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6
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Janssen A, Nguyen QN, Xia Y. Colloidal Metal Nanocrystals with Metastable Crystal Structures. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202017076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Annemieke Janssen
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Quynh N. Nguyen
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Younan Xia
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta Georgia 30332 USA
- School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
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7
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Janssen A, Nguyen QN, Xia Y. Colloidal Metal Nanocrystals with Metastable Crystal Structures. Angew Chem Int Ed Engl 2021; 60:12192-12203. [DOI: 10.1002/anie.202017076] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Indexed: 12/24/2022]
Affiliation(s)
- Annemieke Janssen
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Quynh N. Nguyen
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Younan Xia
- School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30332 USA
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta Georgia 30332 USA
- School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
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8
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Javed N, O'Carroll DM. Long-term effects of impurities on the particle size and optical emission of carbon dots. NANOSCALE ADVANCES 2021; 3:182-189. [PMID: 36131876 PMCID: PMC9417521 DOI: 10.1039/d0na00479k] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 09/24/2020] [Indexed: 05/05/2023]
Abstract
Carbon dots (CDs) are fluorescent nanoparticles that exhibit strong photoluminescence (PL) emission throughout the visible range of the electromagnetic spectrum. Recent studies highlight the presence of fluorescent impurities in CD dispersions. Here, the long-term impact of these impurities on the stability of the physical and optical properties of CDs synthesized by the solvothermal method is studied. A significant increase in particle size is observed as a function of time after synthesis from transmission electron microscopy analysis of CDs. Furthermore, the quantum yield of blue PL emission, which is mostly caused by impurities that contain carboxyl groups, gradually decays from 30% to ∼3% over 13 weeks. The reduction in quantum yield is attributed to decomposition of impurities that, consequently, deposit on the particles and increase particle size. Finally, it is observed that the blue emission decreases considerably when CDs are properly purified and a solvent-dependent yellow emission arises. The yellow emission is almost negligible when CDs are dispersed in water; however, the intensity of yellow emission increases significantly when the concentration of ethanol is increased.
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Affiliation(s)
- Nasir Javed
- Department of Materials Science and Engineering, Rutgers, The State University of New Jersey 607 Taylor Road Piscataway NJ 08854 USA
| | - Deirdre M O'Carroll
- Department of Materials Science and Engineering, Rutgers, The State University of New Jersey 607 Taylor Road Piscataway NJ 08854 USA
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey 123 Bevier Road Piscataway NJ 08854 USA
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9
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Ghanbari R, Safaiee R, Sheikhi MH, Golshan MM, Horastani ZK. Graphene Decorated with Silver Nanoparticles as a Low-Temperature Methane Gas Sensor. ACS APPLIED MATERIALS & INTERFACES 2019; 11:21795-21806. [PMID: 31120237 DOI: 10.1021/acsami.9b00625] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This paper is devoted to an investigation on the methane sensing properties of graphene (G), decorated with silver nanoparticles (AgNPs), under ambient conditions. To do so, we first present an effective modification in the standard manner of decorating graphene by AgNPs. From structural analysis of the product (AgNPs/G), it is concluded that graphene is indeed decorated by AgNPs of a mean size 29.3 nm, free of aggregation, with a uniform distribution. The so-produced material is then used, as a resistivity-based sensor, to examine its response to the presence of methane gas. Our measurements are performed at relatively low temperatures, for various silver-to-graphene mass ratios (SGMRs) and methane concentrations. To account for the effects of humidity, we have made the measurements, at room temperature, for different levels of humidity. Our results demonstrate that an increase in the SGMR enhances the response of AgNPs/G to methane with an optimum value of SGMR ≅ 12%. It is also illustrated that for methane concentrations less than 2000 ppm, the maximal response increases linearly and rapidly, even at room temperature. Moreover, we demonstrate that AgNPs/G is of low limit of detection, highly stable, selective, reversible, repeatable, and sensor-to-sensor reproducible, for methane sensing. The results thus promise a low-cost and simple-to-fabricate methane sensing device.
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Affiliation(s)
| | | | | | | | - Z Karami Horastani
- Department of Electrical Engineering, Shiraz Branch , Islamic Azad University , Shiraz , Iran
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10
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Jin B, Sushko ML, Liu Z, Jin C, Tang R. In Situ Liquid Cell TEM Reveals Bridge-Induced Contact and Fusion of Au Nanocrystals in Aqueous Solution. NANO LETTERS 2018; 18:6551-6556. [PMID: 30188138 DOI: 10.1021/acs.nanolett.8b03139] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
During nanoparticle coalescence in aqueous solution, dehydration and initial contact of particles are critically important but poorly understood processes. In this work, we used in situ liquid-cell transmission electron microscopy to directly visualize the coalescence process of Au nanocrystals. It is found that the Au atomic nanobridge forms between adjacent nanocrystals that are separated by a ∼0.5 nm hydration layer. The nanobridge structure first induces initial contact of Au nanocrystals over their hydration layers and then surface diffusion and grain boundary migration to rearrange into a single nanocrystal. Classical density functional theory calculations and ab initio molecular dynamics simulations suggest that the formation of the nanobridge can be attributed to the accumulation of auric ions and a higher local supersaturation in the gap, which can promote dehydration, contact, and fusion of Au nanocrystals. The discovery of this multistep process advances our understanding of the nanoparticle coalescence mechanism in aqueous solutions.
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Affiliation(s)
| | - Maria L Sushko
- Physical and Computational Sciences Directorate , Pacific Northwest National Laboratory , Richland , Washington 99354 , United States
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11
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Cheng H, Yang N, Lu Q, Zhang Z, Zhang H. Syntheses and Properties of Metal Nanomaterials with Novel Crystal Phases. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1707189. [PMID: 29658155 DOI: 10.1002/adma.201707189] [Citation(s) in RCA: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 01/09/2018] [Indexed: 05/13/2023]
Abstract
In recent decades, researchers have devoted tremendous effort into the rational design and controlled synthesis of metal nanomaterials with well-defined size, morphology, composition, and structure, and great achievements have been reached. However, the crystal-phase engineering of metal nanomaterials still remains a big challenge. Recent research has revealed that the crystal phase of metal nanomaterials can significantly alter their properties, arising from the distinct atomic arrangement and modified electronic structure. Until now, it has been relatively uncommon to synthesize metal nanomaterials with novel crystal phases in spite of the fact that these nanostructures would be promising for various applications. Here, the research progress regarding the fine control of noble metal (Au, Ag, Ru, Rh, Pd) and non-noble metal (Fe, Co, Ni) nanomaterials with novel crystal phases is reviewed. First, synthesis strategies and their phase transformations are summarized, while highlighting the peculiar characteristics of each element. The phase-dependent properties are then discussed by providing representative examples. Finally, the challenges and perspectives in this emerging field are proposed.
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Affiliation(s)
- Hongfei Cheng
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Nailiang Yang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Qipeng Lu
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Zhicheng Zhang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Hua Zhang
- Center for Programmable Materials, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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12
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Belhaj Abdallah B, Landoulsi A, Chatti A. Combined static electromagnetic radiation and plant extract contribute to the biosynthesis of instable nanosilver responsible for the growth of microstructures. JOURNAL OF SAUDI CHEMICAL SOCIETY 2018. [DOI: 10.1016/j.jscs.2017.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Radmilović VV, Göbelt M, Ophus C, Christiansen S, Spiecker E, Radmilović VR. Low temperature solid-state wetting and formation of nanowelds in silver nanowires. NANOTECHNOLOGY 2017; 28:385701. [PMID: 28691926 DOI: 10.1088/1361-6528/aa7eb8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
This article focuses on the microscopic mechanism of thermally induced nanoweld formation between silver nanowires (AgNWs) which is a key process for improving electrical conductivity in NW networks employed for transparent electrodes. Focused ion beam sectioning and transmission electron microscopy were applied in order to elucidate the atomic structure of a welded NW including measurement of the wetting contact angle and characterization of defect structure with atomic accuracy, which provides fundamental information on the welding mechanism. Crystal lattice strain, obtained by direct evaluation of atomic column displacements in high resolution scanning transmission electron microscopy images, was shown to be non-uniform among the five twin segments of the AgNW pentagonal structure. It was found that the pentagonal cross-sectional morphology of AgNWs has a dominant effect on the formation of nanowelds by controlling initial wetting as well as diffusion of Ag atoms between the NWs. Due to complete solid-state wetting, at an angle of ∼4.8°, the welding process starts with homoepitaxial nucleation of an initial Ag layer on (100) surface facets, considered to have an infinitely large radius of curvature. However, the strong driving force for this process due to the Gibbs-Thomson effect, requires the NW contact to occur through the corner of the pentagonal cross-section of the second NW providing a small radius of curvature. After the initial layer is formed, the welded zone continues to grow and extends out epitaxially to the neighboring twin segments.
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Affiliation(s)
- Vuk V Radmilović
- Innovation Center, University of Belgrade, Faculty of Technology and Metallurgy, Karnegijeva 4, 11120 Belgrade, Serbia
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14
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Pearson AK, Kao P, O'Mullane AP, Bhatt AI. Investigating the effect of ionic strength on the suppression of dendrite formation during metal electrodeposition. Phys Chem Chem Phys 2017; 19:14745-14760. [DOI: 10.1039/c7cp00839b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The effect of ionic strength on dendrite formation and suppression has been investigated in an organic solvent (acetonitrile containing TBAPF6) and in the ionic liquid [EMIm][OTf].
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Affiliation(s)
| | - Pon Kao
- Energy
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
- Melbourne
- Australia
| | - Anthony P. O'Mullane
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology (QUT)
- Australia
| | - Anand I. Bhatt
- Energy
- Commonwealth Scientific and Industrial Research Organisation (CSIRO)
- Melbourne
- Australia
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15
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Characterizations of Rapid Sintered Nanosilver Joint for Attaching Power Chips. MATERIALS 2016; 9:ma9070564. [PMID: 28773686 PMCID: PMC5456888 DOI: 10.3390/ma9070564] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Revised: 06/11/2016] [Accepted: 06/27/2016] [Indexed: 11/16/2022]
Abstract
Sintering of nanosilver paste has been extensively studied as a lead-free die-attach solution for bonding semiconductor power chips, such as the power insulated gated bipolar transistor (IGBT). However, for the traditional method of bonding IGBT chips, an external pressure of a few MPa is reported necessary for the sintering time of ~1 h. In order to shorten the processing duration time, we developed a rapid way to sinter nanosilver paste for bonding IGBT chips in less than 5 min using pulsed current. In this way, we firstly dried as-printed paste at about 100 °C to get rid of many volatile solvents because they may result in defects or voids during the out-gassing from the paste. Then, the pre-dried paste was further heated by pulse current ranging from 1.2 kA to 2.4 kA for several seconds. The whole procedure was less than 3 min and did not require any gas protection. We could obtain robust sintered joint with shear strength of 30–35 MPa for bonding 1200-V, 25-A IGBT and superior thermal properties. Static and dynamic electrical performance of the as-bonded IGBT assemblies was also characterized to verify the feasibility of this rapid sintering method. The results indicate that the electrical performance is comparable or even partially better than that of commercial IGBT modules. The microstructure evolution of the rapid sintered joints was also studied by scanning electron microscopy (SEM). This work may benefit the wide usage of nanosilver paste for rapid bonding IGBT chips in the future.
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Stover RJ, Moaseri E, Gourisankar SP, Iqbal M, Rahbar NK, Changalvaie B, Truskett TM, Johnston KP. Formation of Small Gold Nanoparticle Chains with High NIR Extinction through Bridging with Calcium Ions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1127-38. [PMID: 26735290 DOI: 10.1021/acs.langmuir.5b03639] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The self-assembly of citrate-capped Au nanoparticles (5 nm) resulted in branched nanochains by adding CaCl2 versus spherical nanoclusters for NaCl. These assemblies were formed between 1 s to 30 min by tuning the electrostatic repulsion and the interparticle bridging attraction between the cations and citrate ligands as a function of electrolyte concentration. For dilute Ca(2+), strong interparticle bridging favored particle attachment at chain ends. This resulted in the formation of small, branched chains with lengths as short as 20 nm, due to the large Debye length for the diffuse counterions. Furthermore, the bridging produced very small interparticle spacings and sintering, as evident in high-resolution TEM despite the low temperature. This morphology produced a large red shift in the surface plasmon resonance, as characterized by a broad extinction peak with NIR absorption out to 1000 nm, which is unusual for such small particles. Whereas these properties were seen for primary particles with partial citrate monolayers, the degrees of sintering and NIR extinction were small in the case of citrate multilayers. The ability to design the size and shape of nanoparticle clusters as well as the interparticle spacing by tuning bridging and electrostatic interactions may be expected to be quite general and of broad applicability in materials synthesis.
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Affiliation(s)
- Robert J Stover
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Ehsan Moaseri
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Sai P Gourisankar
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Muhammad Iqbal
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Negin K Rahbar
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Behzad Changalvaie
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Thomas M Truskett
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
| | - Keith P Johnston
- Texas Materials Institute, ‡McKetta Department of Chemical Engineering, and §Department of Chemistry, University of Texas at Austin , Austin, Texas 78712, United States
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Li M, Xiao Y, Zhang Z, Yu J. Bimodal sintered silver nanoparticle paste with ultrahigh thermal conductivity and shear strength for high temperature thermal interface material applications. ACS APPLIED MATERIALS & INTERFACES 2015; 7:9157-68. [PMID: 25890996 DOI: 10.1021/acsami.5b01341] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
A bimodal silver nanoparticle (AgNP) paste has been synthesized via the simple ultrasonic mixing of two types of unimodal AgNPs (10 and 50 nm in diameter). By sintering this paste at 250 °C for 30 min, we obtained an ultrahigh thermal conductivity of 278.5 W m(-1) K(-1), approximately 65% of the theoretical value for bulk Ag. The shear strength before and after thermal cycling at 50-200 °C for 1000 cycles was approximately 41.80 and 28.75 MPa, respectively. The results show that this excellent performance is attributable to the unique sintered structures inside the bimodal AgNP paste, including its low but stable porosity and the high density coherent twins. In addition, we systematically discuss the sintering behavior of this paste, including the decomposition of the organic layers and the formation of the coherent twins. On the basis of these results, we confirm that our bimodal AgNP paste has excellent potential as a thermal interface material for high temperature power device applications.
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Affiliation(s)
- Mingyu Li
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Yong Xiao
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Zhihao Zhang
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
| | - Jie Yu
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, People's Republic of China
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Grouchko M, Roitman P, Zhu X, Popov I, Kamyshny A, Su H, Magdassi S. Merging of metal nanoparticles driven by selective wettability of silver nanostructures. Nat Commun 2015; 5:2994. [PMID: 24389630 DOI: 10.1038/ncomms3994] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 11/22/2013] [Indexed: 11/09/2022] Open
Abstract
The welding and sintering of nanomaterials is relevant, for example, to form electrical contacts between metallic particles in printed electronic devices. Usually the welding of nanoparticles is achieved at high temperatures. Here we find that merging of two different metals, silver and gold nanoparticles, occurs on contact at room temperature. The merging process was investigated by experimental and molecular dynamics simulations. We discovered that the merging of these particles is driven by selective wettability of silver nanoparticles, independent of their size and shape (spheres or rods); silver behaves as a soft matter, whereas gold as a hard surface being wetted and retaining its original morphology. During that process, the silver atoms move towards the surface of the Au nanoparticles and wrap the Au nanoparticles in a pulling up-like process, leading to the wetting of Au nanoparticles.
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Affiliation(s)
- Michael Grouchko
- 1] Casali Institute of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel [2]
| | - Polina Roitman
- Casali Institute of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Xi Zhu
- 1] Institute of Advanced Studies, Nanyang Technological University, 60 Nanyang View, Singapore 639673, Singapore [2] School of Materials Science and Engineering, NTU, 50 Nanyang Avenue, Singapore 639798, Singapore [3]
| | - Inna Popov
- 1] The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel [2]
| | - Alexander Kamyshny
- Casali Institute of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Haibin Su
- 1] Institute of Advanced Studies, Nanyang Technological University, 60 Nanyang View, Singapore 639673, Singapore [2] School of Materials Science and Engineering, NTU, 50 Nanyang Avenue, Singapore 639798, Singapore
| | - Shlomo Magdassi
- 1] Casali Institute of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel [2] The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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Ouertani R, Hamdi A, Amri C, Khalifa M, Ezzaouia H. Formation of silicon nanowire packed films from metallurgical-grade silicon powder using a two-step metal-assisted chemical etching method. NANOSCALE RESEARCH LETTERS 2014; 9:574. [PMID: 25349554 PMCID: PMC4209156 DOI: 10.1186/1556-276x-9-574] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Accepted: 10/01/2014] [Indexed: 06/02/2023]
Abstract
In this work, we use a two-step metal-assisted chemical etching method to produce films of silicon nanowires shaped in micrograins from metallurgical-grade polycrystalline silicon powder. The first step is an electroless plating process where the powder was dipped for few minutes in an aqueous solution of silver nitrite and hydrofluoric acid to permit Ag plating of the Si micrograins. During the second step, corresponding to silicon dissolution, we add a small quantity of hydrogen peroxide to the plating solution and we leave the samples to be etched for three various duration (30, 60, and 90 min). We try elucidating the mechanisms leading to the formation of silver clusters and silicon nanowires obtained at the end of the silver plating step and the silver-assisted silicon dissolution step, respectively. Scanning electron microscopy (SEM) micrographs revealed that the processed Si micrograins were covered with densely packed films of self-organized silicon nanowires. Some of these nanowires stand vertically, and some others tilt to the silicon micrograin facets. The thickness of the nanowire films increases from 0.2 to 10 μm with increasing etching time. Based on SEM characterizations, laser scattering estimations, X-ray diffraction (XRD) patterns, and Raman spectroscopy, we present a correlative study dealing with the effect of the silver-assisted etching process on the morphological and structural properties of the processed silicon nanowire films.
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Affiliation(s)
- Rachid Ouertani
- Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Énergie, Technopôle de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisie
| | - Abderrahmen Hamdi
- Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Énergie, Technopôle de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisie
| | - Chohdi Amri
- Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Énergie, Technopôle de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisie
| | - Marouan Khalifa
- Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Énergie, Technopôle de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisie
| | - Hatem Ezzaouia
- Laboratoire de Photovoltaïque, Centre de Recherches et des Technologies de l'Énergie, Technopôle de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisie
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20
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Zhou N, Li D, Yang D. Morphology and composition controlled synthesis of flower-like silver nanostructures. NANOSCALE RESEARCH LETTERS 2014; 9:302. [PMID: 24994957 PMCID: PMC4070649 DOI: 10.1186/1556-276x-9-302] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 06/06/2014] [Indexed: 05/27/2023]
Abstract
Flower-like silver nanostructures with controlled morphology and composition were prepared through wet-chemical synthesis. The reaction rate is simply manipulated by the amount of catalyzing agent ammonia added which is the key point to determine the ratio of hexagonal close-packed (HCP) to face-centered cubic (FCC) phase in silver nanostructures. The existence of formic acid that is the oxidation product of aldehyde group is demonstrated to play a crucial role in achieving the metastable HCP crystal structures by replacing ionic surfactants with polyvinylpyrrolidone (PVP). Utilizing flower-like silver nanostructures as surface-enhanced Raman scattering (SERS) substrates, Raman signal of Rhodamine 6G, or 4-aminothiophenol with concentration as low as 10(-7) M was detected. Moreover, it is demonstrated that phase composition has no direct relation to the SERS enhancing factor which is mainly determined by the amount of hot spots.
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Affiliation(s)
- Ning Zhou
- State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
- Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Dongsheng Li
- State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
- Cyrus Tang Center for Sensor Materials and Applications, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - Deren Yang
- State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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21
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Wang W, Yang M, Wang Z, Yan J, Liu C. Silver nanoparticle aggregates by room temperature electron reduction: preparation and characterization. RSC Adv 2014. [DOI: 10.1039/c4ra11803k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Silver nanoparticle aggregates were fabricated on AAO substrate via room temperature electron reduction. Their color depends on the size of the aggregate, rather than on the size of single AgNPs.
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Affiliation(s)
- Wei Wang
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072, China
| | - Manman Yang
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072, China
| | - Zongyuan Wang
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072, China
| | - Jinmao Yan
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072, China
| | - Changjun Liu
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin 300072, China
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22
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Tang Y, He W, Wang S, Tao Z, Cheng L. New insight into the size-controlled synthesis of silver nanoparticles and its superiority in room temperature sintering. CrystEngComm 2014. [DOI: 10.1039/c3ce42439a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Silver nanoparticles with a controlled size present a high conductivity after room temperature sintering achieved by a chemical process.
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Affiliation(s)
- Yao Tang
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
| | - Wei He
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
| | - Shouxu Wang
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
| | - Zhihua Tao
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
| | - Lijuan Cheng
- State Key Laboratory of Electronic Thin Films and Integrated Devices
- University of Electronic Science and Technology of China
- Chengdu, PR China
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23
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Li L, Wang Q. Spontaneous self-assembly of silver nanoparticles into lamellar structured silver nanoleaves. ACS NANO 2013; 7:3053-3060. [PMID: 23521125 DOI: 10.1021/nn304450b] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Uniform lamellar silver nanoleaves (AgNLs) were spontaneously assembled from 4 nm silver nanoparticles (AgNPs) with p-aminothiophenol (PATP) as mediator under mild shaking at room temperature. The compositions of the AgNLs were verified to be ∼1 nm Ag25 nanoclusters and PATP molecules in quinonoid model. The underlying assembly mechanism was systematically investigated and a two-step reaction process was proposed. First, the 4 nm AgNPs were quickly etched to ∼1 nm Ag25 nanoclusters by PATP in the form of [Ag25(PATP)n]n+ (n<12), which were then further electrostatically or covalently interconnected by PATP to form the repeated unit cells of [Ag25(PATP)n-1](n-1)+-PATP-[Ag25(PATP)n-1](n-1)+ (abbreviated as Ag25-PATP-Ag25). Second, these Ag25-PATP-Ag25 complexes were employed as building blocks to construct lamellar AgNLs under the directions of the strong dipole-dipole interaction and the π-π stacking force between the neighboring benzene rings of PATP. Different reaction parameters including the types and concentrations of ligands, solvents, reaction temperature, ionic strength, and pH, etc., were carefully studied to confirm this mechanism. Finally, the preliminary investigations of the applications for AgNLs as "molecular junctions" and SERS properties were demonstrated. We expect that this convenient and simple method can be in principle extended to other systems, or even mixture system with different types of NPs, and will provide an important avenue for designing metamaterials and exploring their physicochemical properties.
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Affiliation(s)
- Lun Li
- Suzhou Key Laboratory of Nanobiomedical Characterization, Division of Nanobiomedicine and i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, PR China
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24
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Gebregeorgis A, Bhan C, Wilson O, Raghavan D. Characterization of Silver/Bovine Serum Albumin (Ag/BSA) nanoparticles structure: Morphological, compositional, and interaction studies. J Colloid Interface Sci 2013; 389:31-41. [DOI: 10.1016/j.jcis.2012.08.041] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 08/16/2012] [Accepted: 08/18/2012] [Indexed: 01/29/2023]
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25
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Wang G, Lian J, Zhang TY. High resolution transmission electron microscopy in situ investigation into the spontaneous coalescence of gold nanoparticles at room temperature. RSC Adv 2013. [DOI: 10.1039/c3ra43261k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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26
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Mudunkotuwa IA, Pettibone JM, Grassian VH. Environmental implications of nanoparticle aging in the processing and fate of copper-based nanomaterials. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:7001-7010. [PMID: 22280489 DOI: 10.1021/es203851d] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Copper nanomaterials are being used in a large number of commercial products because these materials exhibit unique optical, magnetic, and electronic properties. Metallic copper nanoparticles, which often have a thin surface oxide layer, can age in the ambient environment and become even more oxidized over time. These aged nanoparticles will then have different properties compared to the original nanoparticles. In this study, we have characterized three different types of copper-based nanoparticle (NP) samples designated as Cu(new) NPs, Cu(aged) NPs, and CuO NPs that differ in the level of oxidation. The solution phase behavior of these three copper-based nanoparticle samples is investigated as a function of pH and in the presence and absence of two common, complexing organic acids, citric and oxalic acid. The behavior of these three copper-based NP types shows interesting differences. In particular, Cu(aged) NPs exhibit unique chemistry including oxide phases that form and surface adsorption properties. Overall, the current study provides some insights into the impacts of nanoparticle aging and how the physicochemical characteristics and reactivity of nanomaterials can change upon aging.
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Affiliation(s)
- Imali A Mudunkotuwa
- Department of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
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27
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Vishnyakova EA, Saikova SV, Nikolaeva RB, Mikhlin YL. Synthesis of anisotropic silver nanoparticles and investigation of their sensory properties. RUSS J INORG CHEM+ 2012. [DOI: 10.1134/s0036023612020283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Layani M, Grouchko M, Shemesh S, Magdassi S. Conductive patterns on plastic substrates by sequential inkjet printing of silver nanoparticles and electrolyte sintering solutions. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32789a] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Yu P, Huang J, Tang J. Observation of Coalescence Process of Silver Nanospheres During Shape Transformation to Nanoprisms. NANOSCALE RESEARCH LETTERS 2011; 6:46. [PMID: 27502668 PMCID: PMC3211880 DOI: 10.1007/s11671-010-9808-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Accepted: 09/15/2010] [Indexed: 05/26/2023]
Abstract
In this report, we observed the growth mechanism and the shape transformation from spherical nanoparticles (diameter ~6 nm) to triangular nanoprisms (bisector length ~100 nm). We used a simple direct chemical reduction method and provided evidences for the growth of silver nanoprisms via a coalescence process. Unlike previous reports, our method does not rely upon light, heat, or strong oxidant for the shape transformation. This transformation could be launched by fine-tuning the pH value of the silver colloidal solution. Based on our extensive examination using transmission electron microscopy, we propose a non-point initiated growth mechanism, which is a combination of coalescence and dissolution-recrystallization process during the growth of silver nanoprisms.
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Affiliation(s)
- Pyng Yu
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan.
| | - Jane Huang
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan
| | - Jau Tang
- Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan.
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30
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Liu T, Li D, Yang D, Jiang M. Fabrication of flower-like silver structures through anisotropic growth. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:6211-6217. [PMID: 21500810 DOI: 10.1021/la200512m] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Using a simple chemical reaction, a new nanostructure of silver, which we call a "flower-like silver structure", is produced. The flower-like silver structure consists of a silver core and many rod-like tips protruding out in three dimensions. Besides common face-centered-cubic (FCC) phase of silver, there exists hexagonal-close-packed (HCP) phase in these tips. The appearance of HCP silver is the result of rapid growth of silver nuclei when using CH(2)O or C(2)H(4)O as the reducing agent. The formation of the rod-like tips is caused by the anisotropic growth determined by the HCP phase and the directing role of formic acid, which is the oxidation product of CH(2)O. It is also found that the concentration of reactants, the kind of reducing agents and the sequence of adding reactants can influence the morphology and phase constitution of the final products.
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Affiliation(s)
- Tao Liu
- State Key Laboratory of Silicon Materials and Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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31
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Qu J, Liu H, Wei Y, Wu X, Yue R, Chen Y, Yang J. Coalescence of Ag2S and Au nanocrystals at room temperature. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm12358k] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Magdassi S, Grouchko M, Berezin O, Kamyshny A. Triggering the sintering of silver nanoparticles at room temperature. ACS NANO 2010; 4:1943-8. [PMID: 20373743 DOI: 10.1021/nn901868t] [Citation(s) in RCA: 192] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
A new approach to achieve coalescence and sintering of metallic nanoparticles at room temperature is presented. It was discovered that silver nanoparticles behave as soft particles when they come into contact with oppositely charged polyelectrolytes and undergo a spontaneous coalescence process, even without heating. Utilizing this finding in printing conductive patterns, which are composed of silver nanoparticles, enables achieving high conductivities even at room temperature. Due to the sintering of nanoparticles at room temperature, the formation of conductive patterns on plastic substrates and even on paper is made possible. The resulting high conductivity, 20% of that for bulk silver, enabled fabrication of various devices as demonstrated by inkjet printing of a plastic electroluminescent device.
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Affiliation(s)
- Shlomo Magdassi
- Casali Institute for Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.
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Perelaer J, Smith PJ, Mager D, Soltman D, Volkman SK, Subramanian V, Korvink JG, Schubert US. Printed electronics: the challenges involved in printing devices, interconnects, and contacts based on inorganic materials. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00264j] [Citation(s) in RCA: 594] [Impact Index Per Article: 42.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Johnson L, Thielemans W, Walsh DA. Nanocomposite oxygen reduction electrocatalysts formed using bioderived reducing agents. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b922423h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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