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Omar G, Abd Ellah R, Elzayat M, Afifi G, Imam H. Superior removal of hazardous dye using Ag/Au core–shell nanoparticles prepared by laser ablation. OPTICS & LASER TECHNOLOGY 2024; 168:109868. [DOI: 10.1016/j.optlastec.2023.109868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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2
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Li D, Huang R, Qian X, Li C. Preparation of triangular silver nanoplates by improved light-driven seed growth method. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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3
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Gaidhani NG, Patra S, Chandwadkar HS, Sen D, Majumder C, Ramagiri SV, Bellare JR. Probing Kinetics and Mechanism of Formation of Mixed Metallic Nanoparticles in a Polymer Membrane by Galvanic Replacement between Two Immiscible Metals: Case Study of Nickel/Silver Nanoparticle Synthesis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:1637-1650. [PMID: 33496595 DOI: 10.1021/acs.langmuir.0c02311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Galvanic replacement between metals has received notable research interest for the synthesis of heterometallic nanostructures. The growth pattern of the nanostructures depends on several factors such as extent of lattice mismatch, adhesive interaction between the metals, cohesive forces of the individual metals, etc. Due to the difficulties in probing ultrafast kinetics of the galvanic replacement reaction and particle growth in solution, real-time mechanistic investigations are often limited. As a result, the growth mechanism of one metal on the surface of another metal at the nanoscale is poorly understood so far. In the present work, we could successfully probe the galvanic replacement of silver ions with nickel nanoparticles, stabilized in a polymer membrane, using two complementary methods, namely, small-angle X-ray scattering (SAXS) and radiolabeling, and the results are supported by density functional theory (DFT) computations. The silver-nickel system has been chosen for the present investigation because of the high degree of bulk immiscibility caused by the large lattice mismatch (15.9%) and the weak adhesive interaction, which makes it a perfect model system for immiscible metal pairs. Membrane, as a host medium, plays a crucial role in retarding the kinetics of atomic and particle rearrangements (nucleation and growth) due to slower mobility of the atoms (monomers) and particles within the polymer network. This allowed us to examine the real-time concentration of silver monomers during galvanic replacement of silver ions with nickel nanoparticles and evolution of Ni/Ag nanoparticles. From combined experiment and DFT computations, it has been demonstrated, for the first time to the best of our knowledge, that the majority of silver atoms, which are produced on the nickel nanoparticle surface by galvanic reactions, do not form traditional core-shell nanostructures with nickel and undergo a self-governing sequential nucleation and growth of silver nanoparticles via formation of intermediate prenucleation silver clusters, leading to the formation of mixed metallic nanoparticles in the membrane. The surface of NiNPs has a heterogeneous effect on the silver nucleation pathway, which is evident from the reduced critical free energy barrier of nucleation (ΔGcrit). The present work establishes an original mechanistic pathway based on a sequential nucleation model for formation of mixed metallic nanoparticles by the galvanic replacement route, which opens up future possibilities for size-controlled synthesis in mixed systems.
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Affiliation(s)
- Nikita G Gaidhani
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Department of Chemistry, Sandip University, Nashik 422213, Maharashtra, India
| | - Sabyasachi Patra
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
| | - Hemant S Chandwadkar
- Radiochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Department of Chemistry, Sandip University, Nashik 422213, Maharashtra, India
| | - Debasis Sen
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Chiranjib Majumder
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - Shobha V Ramagiri
- Department of Chemical Engineering, IIT Bombay, Powai, Mumbai 400076, India
| | - Jayesh R Bellare
- Department of Chemical Engineering, IIT Bombay, Powai, Mumbai 400076, India
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4
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Ha M, Kim JH, You M, Li Q, Fan C, Nam JM. Multicomponent Plasmonic Nanoparticles: From Heterostructured Nanoparticles to Colloidal Composite Nanostructures. Chem Rev 2019; 119:12208-12278. [PMID: 31794202 DOI: 10.1021/acs.chemrev.9b00234] [Citation(s) in RCA: 166] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Plasmonic nanostructures possessing unique and versatile optoelectronic properties have been vastly investigated over the past decade. However, the full potential of plasmonic nanostructure has not yet been fully exploited, particularly with single-component homogeneous structures with monotonic properties, and the addition of new components for making multicomponent nanoparticles may lead to new-yet-unexpected or improved properties. Here we define the term "multi-component nanoparticles" as hybrid structures composed of two or more condensed nanoscale domains with distinctive material compositions, shapes, or sizes. We reviewed and discussed the designing principles and synthetic strategies to efficiently combine multiple components to form hybrid nanoparticles with a new or improved plasmonic functionality. In particular, it has been quite challenging to precisely synthesize widely diverse multicomponent plasmonic structures, limiting realization of the full potential of plasmonic heterostructures. To address this challenge, several synthetic approaches have been reported to form a variety of different multicomponent plasmonic nanoparticles, mainly based on heterogeneous nucleation, atomic replacements, adsorption on supports, and biomolecule-mediated assemblies. In addition, the unique and synergistic features of multicomponent plasmonic nanoparticles, such as combination of pristine material properties, finely tuned plasmon resonance and coupling, enhanced light-matter interactions, geometry-induced polarization, and plasmon-induced energy and charge transfer across the heterointerface, were reported. In this review, we comprehensively summarize the latest advances on state-of-art synthetic strategies, unique properties, and promising applications of multicomponent plasmonic nanoparticles. These plasmonic nanoparticles including heterostructured nanoparticles and composite nanostructures are prepared by direct synthesis and physical force- or biomolecule-mediated assembly, which hold tremendous potential for plasmon-mediated energy transfer, magnetic plasmonics, metamolecules, and nanobiotechnology.
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Affiliation(s)
- Minji Ha
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
| | - Jae-Ho Kim
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
| | - Myunghwa You
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
| | - Qian Li
- School of Chemistry and Chemical Engineering, and Institute of Molecular Medicine, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, and Institute of Molecular Medicine, Renji Hospital, School of Medicine , Shanghai Jiao Tong University , Shanghai 200240 , China
| | - Jwa-Min Nam
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
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5
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Ahmad N, Bon M, Passerone D, Erni R. Template-Assisted in Situ Synthesis of Ag@Au Bimetallic Nanostructures Employing Liquid-Phase Transmission Electron Microscopy. ACS NANO 2019; 13:13333-13342. [PMID: 31647643 DOI: 10.1021/acsnano.9b06614] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Noble metal nanostructure synthesis via seed-mediated route is a widely adopted strategy for a plethora of nanocrystal systems. Ag@Au core-shell nanostructures are radiolytically grown in real-time using in situ liquid-cell (scanning) transmission electron microscopy. Here we employ a capping agent, dimethyl-amine (DMA) and a coordinating complex, potassium iodide (KI) in an organic solvent (methanol) in order to (1) slow down the reaction kinetics to observe mechanistic insights into the overgrowth process and (2) shift the growth regime from galvanic-replacement mode to direct synthesis mode resulting in the conventional synthesis of Ag@Au core-shell structures. A theoretical approach based on classical simulations complements our experiments, providing further insight on the growth modes. In particular, we focus on the shape evolution and chemical ordering, as currently there is an insufficient understanding regarding mixed composition phases at interfaces of alloys even with well-known miscibilities. Furthermore, the comparison of theoretical and experimental data reveals that the final morphology of these nanoalloys is not simply a function of crystallinity of the underlying seed structure but instead is readily modified by extrinsic parameters such as additives, capping agent, and modulation of surface energies of exposed crystal surfaces by the encapsulating solvent. The impact of these additional parameters is systematically investigated using an empirical approach in light of ab initio simulations.
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Affiliation(s)
- Nabeel Ahmad
- Electron Microscopy Center , Empa , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Marta Bon
- Electron Microscopy Center , Empa , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Daniele Passerone
- nanotech@surfaces , Empa , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
| | - Rolf Erni
- Electron Microscopy Center , Empa , Überlandstrasse 129 , CH-8600 Dübendorf , Switzerland
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6
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Chen Y, Fan Z, Zhang Z, Niu W, Li C, Yang N, Chen B, Zhang H. Two-Dimensional Metal Nanomaterials: Synthesis, Properties, and Applications. Chem Rev 2018; 118:6409-6455. [PMID: 29927583 DOI: 10.1021/acs.chemrev.7b00727] [Citation(s) in RCA: 371] [Impact Index Per Article: 61.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
As one unique group of two-dimensional (2D) nanomaterials, 2D metal nanomaterials have drawn increasing attention owing to their intriguing physiochemical properties and broad range of promising applications. In this Review, we briefly introduce the general synthetic strategies applied to 2D metal nanomaterials, followed by describing in detail the various synthetic methods classified in two categories, i.e. bottom-up methods and top-down methods. After introducing the unique physical and chemical properties of 2D metal nanomaterials, the potential applications of 2D metal nanomaterials in catalysis, surface enhanced Raman scattering, sensing, bioimaging, solar cells, and photothermal therapy are discussed in detail. Finally, the challenges and opportunities in this promising research area are proposed.
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Affiliation(s)
- Ye Chen
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Zhanxi Fan
- 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
| | - Wenxin Niu
- Center for Programmable Materials, School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore
| | - Cuiling Li
- 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
| | - Bo Chen
- 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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7
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Li J, Ma HZ, Reid GE, Edwards AJ, Hong Y, White JM, Mulder RJ, O'Hair RAJ. Synthesis and X‐Ray Crystallographic Characterisation of Frustum‐Shaped Ligated [Cu
18
H
16
(DPPE)
6
]
2+
and [Cu
16
H
14
(DPPA)
6
]
2+
Nanoclusters and Studies on Their H
2
Evolution Reactions. Chemistry 2018; 24:2070-2074. [DOI: 10.1002/chem.201705448] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Indexed: 12/26/2022]
Affiliation(s)
- Jiaye Li
- School of Chemistry and Bio21 Molecular Science, and Biotechnology Institute University of Melbourne 30 Flemington Rd Parkville, Victoria 3010 Australia
| | - Howard Z. Ma
- School of Chemistry and Bio21 Molecular Science, and Biotechnology Institute University of Melbourne 30 Flemington Rd Parkville, Victoria 3010 Australia
| | - Gavin E. Reid
- School of Chemistry and Bio21 Molecular Science, and Biotechnology Institute University of Melbourne 30 Flemington Rd Parkville, Victoria 3010 Australia
- Department of Biochemistry and Molecular Biology University of Melbourne 30 Flemington Rd Parkville, Victoria 3010 Australia
| | - Alison J. Edwards
- Australian Centre for Neutron Scattering Australian Nuclear Science and Technology Organisation New Illawarra Road Lucas Heights NSW 2234 Australia
| | - Yuning Hong
- School of Chemistry and Bio21 Molecular Science, and Biotechnology Institute University of Melbourne 30 Flemington Rd Parkville, Victoria 3010 Australia
| | - Jonathan M. White
- School of Chemistry and Bio21 Molecular Science, and Biotechnology Institute University of Melbourne 30 Flemington Rd Parkville, Victoria 3010 Australia
| | - Roger J. Mulder
- CSIRO Manufacturing Research Way Clayton, Victoria 3168 Australia
| | - Richard A. J. O'Hair
- School of Chemistry and Bio21 Molecular Science, and Biotechnology Institute University of Melbourne 30 Flemington Rd Parkville, Victoria 3010 Australia
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8
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Lataifeh A, Kraatz HB, Goncharova LV. Core–Shell Nanoparticles Containing Peptide Dendrimers. J Inorg Organomet Polym Mater 2017. [DOI: 10.1007/s10904-017-0689-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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9
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Shape/size controlling syntheses, properties and applications of two-dimensional noble metal nanocrystals. Front Chem Sci Eng 2016. [DOI: 10.1007/s11705-016-1576-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Gilroy KD, Ruditskiy A, Peng HC, Qin D, Xia Y. Bimetallic Nanocrystals: Syntheses, Properties, and Applications. Chem Rev 2016; 116:10414-72. [DOI: 10.1021/acs.chemrev.6b00211] [Citation(s) in RCA: 1109] [Impact Index Per Article: 138.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Kyle D. Gilroy
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
| | | | | | | | - Younan Xia
- The
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, United States
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11
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Wang Y, Zhai J, Song Y, He L. The Ag shell thickness effect of Au@Ag@SiO2 core–shell nanoparticles on the optoelectronic performance of dye sensitized solar cells. Chem Commun (Camb) 2016; 52:2390-3. [DOI: 10.1039/c5cc08827e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The LSPR effect of Au@Ag@SiO2 core–shell–ultra-thin shell nanoparticles is finely tailored and tuned by varying the Ag shell thickness. The growth of silver shell onto Au NPs led to color changes from different tones of red to orange.
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Affiliation(s)
- Yang Wang
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
| | - Jin Zhai
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
| | - Yanlin Song
- Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education
- Beijing Key Laboratory of Bio-inspired Energy Materials and Devices
- School of Chemistry and Environment
- Beihang University
- Beijing 100191
| | - Ling He
- School of science
- Xi`an Jiaotong University
- Xi`an
- PR China
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12
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Xie T, Jing C, Ma W, Ding Z, Gross AJ, Long YT. Real-time monitoring for the morphological variations of single gold nanorods. NANOSCALE 2015; 7:511-517. [PMID: 25409885 DOI: 10.1039/c4nr05080k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The morphological characteristics of metal nanoparticles, particularly the shape, play an essential role in the optical, physical and chemical properties. In this work, we reported a transverse etching process to investigate the morphological variations of single gold nanorods (GNRs). Dark-field microscopy and Rayleigh scattering spectroscopy were used as complementary technologies to track the transverse etching process. Dark-field imaging with high spatial and temporal resolution could easily monitor the transverse etching process of GNRs in situ and in real time. Interactions between the scattering spectrum and the morphological variations were judiciously calculated within the dipole approximation by the Drude function. The calculated peak shift of GNRs (Δλmax = 17 nm) was obtained via the ratio of the long axis and short axis (aspect ratio) of GNRs from transmission electron microscopy. The average scattering peak shift (Δλmax = 22 nm) from Rayleigh scattering spectroscopy was in good agreement with the calculated peak shift. Monitoring the morphological variations of single GNRs enables us to track the transverse etching of GNRs at arbitrary time. This promises to be a useful method for the study of different nanomaterials and their spectral properties.
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Affiliation(s)
- Tao Xie
- Key Laboratory for Advanced Materials & Department of Chemistry, East China University of Science and Technology, Shanghai 200237, P. R. China.
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13
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Fan Z, Huang X, Tan C, Zhang H. Thin metal nanostructures: synthesis, properties and applications. Chem Sci 2015; 6:95-111. [PMID: 28553459 PMCID: PMC5424468 DOI: 10.1039/c4sc02571g] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 09/23/2014] [Indexed: 12/22/2022] Open
Abstract
Two-dimensional nanomaterials, especially graphene and single- or few-layer transition metal dichalcogenide nanosheets, have attracted great research interest in recent years due to their distinctive physical, chemical and electronic properties as well as their great potentials for a broad range of applications. Recently, great efforts have also been devoted to the controlled synthesis of thin nanostructures of metals, one of the most studied traditional materials, for various applications. In this minireview, we review the recent progress in the synthesis and applications of thin metal nanostructures with a focus on metal nanoplates and nanosheets. First of all, various methods for the synthesis of metal nanoplates and nanosheets are summarized. After a brief introduction of their properties, some applications of metal nanoplates and nanosheets, such as catalysis, surface enhanced Raman scattering (SERS), sensing and near-infrared photothermal therapy are described.
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Affiliation(s)
- Zhanxi Fan
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . ; http://www.ntu.edu.sg/home/hzhang/
| | - Xiao Huang
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . ; http://www.ntu.edu.sg/home/hzhang/
| | - Chaoliang Tan
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . ; http://www.ntu.edu.sg/home/hzhang/
| | - Hua Zhang
- School of Materials Science and Engineering , Nanyang Technological University , 50 Nanyang Avenue , Singapore 639798 , Singapore . ; http://www.ntu.edu.sg/home/hzhang/
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14
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Xu BB, Wang L, Ma ZC, Zhang R, Chen QD, Lv C, Han B, Xiao XZ, Zhang XL, Zhang YL, Ueno K, Misawa H, Sun HB. Surface-plasmon-mediated programmable optical nanofabrication of an oriented silver nanoplate. ACS NANO 2014; 8:6682-6692. [PMID: 24896225 DOI: 10.1021/nn5029345] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report polarized femtosecond laser-light-mediated growth and programmable assembly of photoreduced silver nanoparticles into triply hierarchical micropatterns. Formation of erected arrays of nanoplates with a thickness as small as λ/27 (λ, the writing laser wavelength) level is demonstrated. The growth mechanism of nanoplates has been clarified: (i) the excited surface plasmons enhance the local electric field and lead to spatially selective growth of silver atoms at the opposite ends of dipoles induced on early created silver seeds; (ii) the optical attractive force overcomes electrostatic repulsion in the enhanced local electric field to assemble the silver nanoparticles directly. The triply hierarchical micropattern shape and location, the nanoplate orientation, and thickness are all attained in controlled fashion.
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15
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Wu W, Maye MM. Discrete Dipole Approximation Analysis of Plasmonic Core/Alloy Nanoparticles. Chemphyschem 2014; 15:2582-7. [DOI: 10.1002/cphc.201402082] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Indexed: 11/08/2022]
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16
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Yang Y, Liu J, Fu ZW, Qin D. Galvanic replacement-free deposition of Au on Ag for core-shell nanocubes with enhanced chemical stability and SERS activity. J Am Chem Soc 2014; 136:8153-6. [PMID: 24863686 DOI: 10.1021/ja502472x] [Citation(s) in RCA: 251] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We report a robust synthesis of Ag@Au core-shell nanocubes by directly depositing Au atoms on the surfaces of Ag nanocubes as conformal, ultrathin shells. Our success relies on the introduction of a strong reducing agent to compete with and thereby block the galvanic replacement between Ag and HAuCl4. An ultrathin Au shell of 0.6 nm thick was able to protect the Ag in the core in an oxidative environment. Significantly, the core-shell nanocubes exhibited surface plasmonic properties essentially identical to those of the original Ag nanocubes, while the SERS activity showed a 5.4-fold further enhancement owing to an improvement in chemical enhancement. The combination of excellent SERS activity and chemical stability may enable a variety of new applications.
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Affiliation(s)
- Yin Yang
- School of Materials Science and Engineering, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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17
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Biswas A, Roy S, Banerjee A. Peptide stabilized Ag@Au Core-shell Nanoparticles: Synthesis, Variation of Shell Thickness, and Catalysis. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201300614] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Synthesis of silver nanostructures by multistep methods. SENSORS 2014; 14:5860-89. [PMID: 24670722 PMCID: PMC4029645 DOI: 10.3390/s140405860] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Revised: 03/16/2014] [Accepted: 03/18/2014] [Indexed: 12/28/2022]
Abstract
The shape of plasmonic nanostructures such as silver and gold is vital to their physical and chemical properties and potential applications. Recently, preparation of complex nanostructures with rich function by chemical multistep methods is the hotspot of research. In this review we introduce three typical multistep methods to prepare silver nanostructures with well-controlled shapes, including the double reductant method, etching technique and construction of core-shell nanostructures. The growth mechanism of double the reductant method is that different favorable facets of silver nanocrystals are produced in different reductants, which can be used to prepare complex nanostructures such as nanoflags with ultranarrow resonant band bandwidth or some silver nanostructures which are difficult to prepare using other methods. The etching technique can selectively remove nanoparticles to achieve the aim of shape control and is widely used for the synthesis of nanoflowers and hollow nanostructures. Construction of core-shell nanostructures is another tool to control shape and size. The three methods can not only prepare various silver nanostructures with well-controlled shapes, which exhibit unique optical properties, such as strong surface-enhanced Raman scattering (SERS) signal and localized surface plasmon resonance (LSPR) effect, but also have potential application in many areas.
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19
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Tsao YC, Rej S, Chiu CY, Huang MH. Aqueous Phase Synthesis of Au–Ag Core–Shell Nanocrystals with Tunable Shapes and Their Optical and Catalytic Properties. J Am Chem Soc 2013; 136:396-404. [DOI: 10.1021/ja410663g] [Citation(s) in RCA: 131] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yu-Chi Tsao
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Sourav Rej
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chun-Ya Chiu
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Michael H. Huang
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
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20
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Ma X, Xia Y, Ni L, Song L, Wang Z. Preparation of gold nanoparticles-agarose gel composite and its application in SERS detection. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 121:657-661. [PMID: 24368285 DOI: 10.1016/j.saa.2013.11.111] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Revised: 11/25/2013] [Accepted: 11/28/2013] [Indexed: 06/03/2023]
Abstract
Agarose gel/gold nanoparticles hybrid was prepared by adding gold nanoparticles to preformed agarose gel. Nanocomposite structures and properties were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and UV-Vis-NIR absorption spectroscopy. Based on the swelling-contraction characteristics of agarose gel and the adjustable localized surface plasmon resonance (LSPR) of the gold nanoparticles, the nanocomposites were used as surface enhanced Raman scattering (SERS) substrate to detect the Raman signal molecules (NBA, MBA, 1NAT). Results revealed that the porous structure of the agarose gel provided a good carrier for the enrichment of the gold nanoparticles. The gold nanoparticles dynamic hot-spot effect arising from the agarose gel contraction loss of water in the air greatly enhanced the Raman signal. Furthermore, the gel could be cleaned with washing solution and recycling could be achieved for Raman detection.
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Affiliation(s)
- Xiaoyuan Ma
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; The State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China
| | - Yu Xia
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China
| | - Lili Ni
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Liangjing Song
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, PR China; Synergetic Innovation Center of Food Safety and Nutrition, Jiangnan University, Wuxi 214122, PR China.
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21
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Kumar VB, Gedanken A, Paik P. Triangular Core–Shell ZnO@SiO
2
Nanoparticles. Chemphyschem 2013; 14:3215-20. [DOI: 10.1002/cphc.201300480] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Indexed: 01/26/2023]
Affiliation(s)
- Vijay Bhooshan Kumar
- Materials Engineering and Nanoscience and Technology, School of Engineering Sciences and Technology, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, A.P., 500 046 (India), Fax: (+91) 40‐23011087
| | - Aharon Gedanken
- Institute for Nanotechnology and Advanced Materials, Department of Chemistry, Bar‐Ilan University, Ramat‐Gan, 52900 (Israel)
| | - Pradip Paik
- Materials Engineering and Nanoscience and Technology, School of Engineering Sciences and Technology, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, A.P., 500 046 (India), Fax: (+91) 40‐23011087
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22
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Macfarlane RJ, O'Brien MN, Petrosko SH, Mirkin CA. Nucleinsäuremodifizierte Nanostrukturen als programmierbare Atomäquivalente: Entwicklung eines neuen “Systems der Elemente”. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209336] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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23
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Macfarlane RJ, O'Brien MN, Petrosko SH, Mirkin CA. Nucleic acid-modified nanostructures as programmable atom equivalents: forging a new "table of elements". Angew Chem Int Ed Engl 2013; 52:5688-98. [PMID: 23640804 DOI: 10.1002/anie.201209336] [Citation(s) in RCA: 126] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 01/24/2013] [Indexed: 12/29/2022]
Affiliation(s)
- Robert J Macfarlane
- Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
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24
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Straney PJ, Andolina CM, Millstone JE. Seedless initiation as an efficient, sustainable route to anisotropic gold nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:4396-4403. [PMID: 23517186 DOI: 10.1021/la400227k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Seedless initiation has been used as a simple and sustainable alternative to seed-mediated production of two canonical anisotropic gold nanoparticles: nanorods and nanoprisms. The concentration of reducing agent during the nucleation event was found to influence the resulting product morphology, producing nanorods with lengths from 30 to 630 nm and triangular or hexagonal prisms with vertex-to-vertex lengths ranging from 120 to over 700 nm. The seedless approach is then used to eliminate several chemical reagents and reactions steps from classic particle preparations while achieving almost identical nanoparticle products and product yields. Our results shed light on factors that influence (or do not influence) the evolution of gold nanoparticle shape and present a dramatically more efficient route to obtaining these architectures. Specifically, using these methods reduces the total amount of reagent needed to produce nanorods and nanoprisms by as much as 90 wt % and, to the best of our knowledge, has yielded the first report of spectroscopically discernible, colloidal gold nanoplates synthesized using a seedless methodology.
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Affiliation(s)
- Patrick J Straney
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260-8929, United States
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25
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Zhen SJ, Zhang ZY, Li N, Zhang ZD, Wang J, Li CM, Zhan L, Zhuang HL, Huang CZ. UV light-induced self-assembly of gold nanocrystals into chains and networks in a solution of silver nitrate. NANOTECHNOLOGY 2013; 24:055601. [PMID: 23306830 DOI: 10.1088/0957-4484/24/5/055601] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Controllable assemblies of nanocrystals have attracted considerable interest because they often exhibit unique collective properties that differ from those displayed by individual nanocrystals and bulk samples. Reported approaches to prepare nanocrystal assemblies based on the molecular recognitions of small molecules or biomacromolecules are effective, but often require complicated and time-consuming modification processes of nanocrystals. In this paper, we demonstrate a simple and universal approach to assemble gold nanocrystals (AuNCs) into linear chains and complex networks in aqueous silver nitrate medium under irradiation with UV light without the involvement of any modification step. Due to the strong plasmon resonance coupling verified by finite difference time domain calculation, the assembled structures of AuNCs can be used as excellent surface-enhanced Raman scattering substrates and dark-field light-scattering bioimaging probes.
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Affiliation(s)
- Shu Jun Zhen
- Education Ministry Key Laboratory on Luminescence and Real-Time Analysis, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, People's Republic of China
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26
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Gong J, Zhou F, Li Z, Tang Z. Controlled synthesis of non-epitaxially grown Pd@Ag core–shell nanocrystals of interesting optical performance. Chem Commun (Camb) 2013; 49:4379-81. [DOI: 10.1039/c2cc37825f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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27
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Kim J, Hong S, Jang HJ, Choi Y, Park S. Influence of iodide ions on morphology of silver growth on gold hexagonal nanoplates. J Colloid Interface Sci 2013; 389:71-6. [DOI: 10.1016/j.jcis.2012.09.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Revised: 07/27/2012] [Accepted: 09/03/2012] [Indexed: 11/25/2022]
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28
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Zhang X, Wang H, Su Z. Fabrication of Au@Ag core-shell nanoparticles using polyelectrolyte multilayers as nanoreactors. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:15705-15712. [PMID: 23075212 DOI: 10.1021/la303320z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new synthetic strategy has been developed for the fabrication of Au-Ag bimetallic core-shell nanoparticles (NPs) using polyelectrolyte multilayers (PEMs) as unique nanoreactors. Bimetallic NPs composed of Au core and Ag shell were successively incorporated into PEMs by repeating anion/cation exchange/reduction cycle multiple times in a stepwise manner. The strategy described here allows for the facile preparation of Au@Ag core-shell NPs with well-controlled core and shell dimensions and geometrically tunable optical properties by simply varying the number of ion-exchange/reduction cycles in the PEM matrix. The strategy can be extended to synthesize in situ other core-shell NPs in polymer matrix.
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Affiliation(s)
- Xin Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, PR China
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29
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Langille MR, Personick ML, Zhang J, Mirkin CA. Defining Rules for the Shape Evolution of Gold Nanoparticles. J Am Chem Soc 2012; 134:14542-54. [DOI: 10.1021/ja305245g] [Citation(s) in RCA: 535] [Impact Index Per Article: 44.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Mark R. Langille
- Department of Chemistry and International Institute
for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Michelle L. Personick
- Department of Chemistry and International Institute
for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Jian Zhang
- Department of Chemistry and International Institute
for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Chad A. Mirkin
- Department of Chemistry and International Institute
for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
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30
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He G, Zeng J, Jin M, Zhang H, Lu N, Wang J, Kim MJ, Xia Y. A Mechanistic Study on the Nucleation and Growth of Au on Pd Seeds with a Cubic or Octahedral Shape. ChemCatChem 2012. [DOI: 10.1002/cctc.201200205] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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31
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32
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Dement’eva OV, Rudoy VM. Colloidal synthesis of new silver-based nanostructures with tailored localized surface plasmon resonance. COLLOID JOURNAL 2011. [DOI: 10.1134/s1061933x11060032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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Zeng J, Zhu C, Tao J, Jin M, Zhang H, Li ZY, Zhu Y, Xia Y. Controlling the Nucleation and Growth of Silver on Palladium Nanocubes by Manipulating the Reaction Kinetics. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201107061] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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Zeng J, Zhu C, Tao J, Jin M, Zhang H, Li ZY, Zhu Y, Xia Y. Controlling the Nucleation and Growth of Silver on Palladium Nanocubes by Manipulating the Reaction Kinetics. Angew Chem Int Ed Engl 2011; 51:2354-8. [DOI: 10.1002/anie.201107061] [Citation(s) in RCA: 201] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2011] [Indexed: 11/07/2022]
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35
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Guha S, Roy S, Banerjee A. Fluorescent Au@Ag core-shell nanoparticles with controlled shell thickness and Hg(II) sensing. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:13198-13205. [PMID: 21913719 DOI: 10.1021/la203077z] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Au-Ag core-shell nanoparticles have been synthesized using synthetic fluorescent dipeptide β-Ala-Trp (β-Ala is β-alanine; Trp is l-tryptophan) in water at pH 6.94 and at room temperature. The synthesis of the Au-Ag core-shell nanomaterial does not involve any external reducing and stabilizing agents, and the constituents of dipeptide β-alanine and l-tryptophan are naturally occurring. Therefore, the synthesis procedure is ecofriendly. Moreover, the shell thickness has also been controlled, and the optical property of the core-shell nanomaterial varies with the shell thickness. The core-shell nanomaterial exhibits a fascinating fluorescence property. This fluorescent Au@Ag core-shell nanoparticle can detect toxic Hg(II) ions ultrasensitively (with a lower limit of detection of 9 nM) even in presence of Zn(II), Cd(II), and other bivalent metal ions (Ca(II), Mg(II), Ni(II), Mn(II), Ba(II), Sr(II), Pb(II), and Fe(II)). Au-Ag core-shell nanomaterials can also be reused for sensing Hg(II) ions.
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Affiliation(s)
- Samit Guha
- Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
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36
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Controlled growth of uniform noble metal nanocrystals: Aqueous-based synthesis and some applications in biomedicine. Colloids Surf B Biointerfaces 2011; 88:1-22. [DOI: 10.1016/j.colsurfb.2011.07.017] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2011] [Revised: 07/05/2011] [Accepted: 07/06/2011] [Indexed: 11/19/2022]
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37
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Jones MR, Osberg KD, Macfarlane RJ, Langille MR, Mirkin CA. Templated Techniques for the Synthesis and Assembly of Plasmonic Nanostructures. Chem Rev 2011; 111:3736-827. [DOI: 10.1021/cr1004452] [Citation(s) in RCA: 996] [Impact Index Per Article: 76.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Matthew R. Jones
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Kyle D. Osberg
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Robert J. Macfarlane
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Mark R. Langille
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
| | - Chad A. Mirkin
- Department of Materials Science and Engineering, ‡Department of Chemistry, and §International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, United States
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38
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Rycenga M, Cobley CM, Zeng J, Li W, Moran CH, Zhang Q, Qin D, Xia Y. Controlling the synthesis and assembly of silver nanostructures for plasmonic applications. Chem Rev 2011; 111:3669-712. [PMID: 21395318 PMCID: PMC3110991 DOI: 10.1021/cr100275d] [Citation(s) in RCA: 1327] [Impact Index Per Article: 102.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Matthew Rycenga
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Claire M. Cobley
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Jie Zeng
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Weiyang Li
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Christine H. Moran
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Qiang Zhang
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Dong Qin
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Younan Xia
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
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39
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Langille MR, Zhang J, Mirkin CA. Plasmon-Mediated Synthesis of Heterometallic Nanorods and Icosahedra. Angew Chem Int Ed Engl 2011; 50:3543-7. [DOI: 10.1002/anie.201007755] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Indexed: 11/06/2022]
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40
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Langille MR, Zhang J, Mirkin CA. Plasmon-Mediated Synthesis of Heterometallic Nanorods and Icosahedra. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007755] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Cortie MB, McDonagh AM. Synthesis and Optical Properties of Hybrid and Alloy Plasmonic Nanoparticles. Chem Rev 2011; 111:3713-35. [PMID: 21235212 DOI: 10.1021/cr1002529] [Citation(s) in RCA: 408] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Michael B. Cortie
- Institute for Nanoscale Technology, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia
| | - Andrew M. McDonagh
- Institute for Nanoscale Technology, University of Technology Sydney, P.O. Box 123, Broadway, NSW 2007, Australia
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42
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Jang MH, Kim JK, Tak H, Yoo H. Controllable synthesis of multi-layered gold spirangles. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm13531g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Ma Y, Li W, Cho EC, Li Z, Yu T, Zeng J, Xie Z, Xia Y. Au@Ag core-shell nanocubes with finely tuned and well-controlled sizes, shell thicknesses, and optical properties. ACS NANO 2010; 4:6725-34. [PMID: 20964400 PMCID: PMC2997519 DOI: 10.1021/nn102237c] [Citation(s) in RCA: 295] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
This paper describes a facile method for generating Au@Ag core-shell nanocubes with edge lengths controllable in the range of 13.4-50 nm. The synthesis involved the use of single-crystal, spherical Au nanocrystals of 11 nm in size as the seeds in an aqueous system, with ascorbic acid serving as the reductant and cetyltrimethylammonium chloride (CTAC) as the capping agent. The thickness of the Ag shells could be finely tuned from 1.2 to 20 nm by varying the ratio of AgNO(3) precursor to Au seeds. We also investigated the growth mechanism by examining the effects of seeds (capped by CTAC or cetyltrimethylammonium bromide(CTAB)) and capping agent (CTAC vs CTAB) on both size and shape of the resultant core-shell nanocrystals. Our results clearly indicate that CTAC worked much better than CTAB as a capping agent in both the syntheses of Au seeds and Au@Ag core-shell nanocubes. We further studied the localized surface plasmon resonance properties of the Au@Ag nanocubes as a function of the Ag shell thickness. By comparing with the extinction spectra obtained from theoretical calculations, we derived a critical value of ca. 3 nm for the shell thickness at which the plasmon excitation of the Au cores would be completely screened by the Ag shells. Moreover, these Au@Ag core-shell nanocubes could be converted into Au-based hollow nanostructures containing the original Au seeds in the interiors through a galvanic replacement reaction.
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Affiliation(s)
- Yanyun Ma
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
- State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Weiyang Li
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Eun Chul Cho
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Zhiyuan Li
- Institute of Physics, Chinese Academy of Sciences, Beijing 100080, P. R. China
| | - Taekyung Yu
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Jie Zeng
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
| | - Zhaoxiong Xie
- State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, P. R. China
| | - Younan Xia
- Department of Biomedical Engineering, Washington University, St. Louis, Missouri 63130
- corresponding author:
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44
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Wang F, Sun LD, Feng W, Chen H, Yeung MH, Wang J, Yan CH. Heteroepitaxial growth of core-shell and core-multishell nanocrystals composed of palladium and gold. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2010; 6:2566-2575. [PMID: 20963792 DOI: 10.1002/smll.201000817] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The heteroepitaxial growth of the core-shell nanocrystals composed of Pd and Au is developed. Pd nanocubes or Au nano-octahedrons are utilized as the cores. The growths of the Au and Pd shells are realized under similar conditions, where the same reducing agent and stabilizing surfactant are employed. The preparation is highly controllable, and the epitaxial growth is repeated up to three times to yield Pd@Au@Pd@Au and Au@Pd@Au@Pd core-trishell nanocrystals. The thickness of each shell is readily varied by changing the amount of the metal salts used for growth. All of the nanocrystal products have narrow size distributions and are single crystalline. The plasmon resonance properties of these nanocrystals are mainly determined by the exterior shell. The plasmon of the Pd-shell-terminated nanocrystals is suppressed, while that of the Au-shell-terminated ones is recovered and is stronger when the Au shell becomes thicker. This growth method can potentially be extended to other metals for the synthetic design of more complex core-multishell metal nanostructures with desirable optical, catalytic, and magnetic properties.
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Affiliation(s)
- Feng Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, PR China
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45
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Garg N, Scholl C, Mohanty A, Jin R. The role of bromide ions in seeding growth of Au nanorods. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:10271-6. [PMID: 20394386 DOI: 10.1021/la100446q] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We report our findings on the important role of bromide ions in the seeding growth process of Au nanorods. The seed-mediated process constitutes a well-developed method for synthesizing gold nanorods in high yield, which is facilitated by a micelle-forming surfactant, cetyltrimethylammonium bromide (CTA-Br). Despite the tremendous work in recent years, the growth mechanism of Au nanorods has not been fully understood. Contrary to the widely accepted mechanism of CTA(+) micelle-templated growth of Au nanorods, we have identified the critical role of bromide ions in the seeding growth of Au nanorods. We found that even when the micelle-forming agent (CTA(+)) concentration is below its critical micelle concentration (cmc), bromide ions added in the form of NaBr can successfully effect the growth of Au nanorods in good yield. By controlling the concentration of externally added bromide ions, the rod shape and dimensions of the resulting Au nanoparticles can be readily controlled in the presence of only a minimum amount of CTABr (as a steric stabilizer for nanorods). High-resolution TEM studies show that the as-formed nanorods are perfectly single crystalline, instead of penta-twinned ones, and are bound by {111} and {100} facets with a [110] direction as the elongation direction. A mechanism is proposed to account for the seeding growth of single crystalline Au nanorods. Overall, this work explicitly demonstrates that Br(-) indeed serves as an important shape-directing agent for gold nanorod formation in the seed-mediated process.
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Affiliation(s)
- Niti Garg
- Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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46
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Cho EC, Camargo PHC, Xia Y. Synthesis and characterization of noble-metal nanostructures containing gold nanorods in the center. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:744-748. [PMID: 20217782 DOI: 10.1002/adma.200903097] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Eun Chul Cho
- Department of Biomedical Engineering, School of Engineering and Applied Science, Washington University, St. Louis, MO 63130, USA
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