1
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Yu H, Janssen A, Pawlik V, Xia Y. Bipyramidal Nanocrystals of Noble Metals: From Synthesis to Applications. Chemistry 2024; 30:e202402478. [PMID: 39085050 DOI: 10.1002/chem.202402478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2024] [Revised: 07/30/2024] [Accepted: 07/31/2024] [Indexed: 08/02/2024]
Abstract
Shape control has been a major theme of nanocrystal research in terms of synthesis, property tailoring, and optimization of performance in a variety of applications. Among the possible shapes, bipyramids are unique owing to their symmetry, planar defects, and exposed facets. In this article, we focus on the colloidal synthesis of noble-metal nanocrystals featuring a triangular bipyramidal shape, together with highlights of their properties and applications. We start with a brief discussion of the general classification and requirements for the nucleation and growth of bipyramidal nanocrystals, followed by specific aspects regarding the synthetic methods with a focus on the roles of reduction, etching, and capping, as well as controls of facet, size, aspect ratio, and corner truncation. In the end, we illustrate how these aspects affect the properties of bipyramidal nanocrystals for plasmonic and catalytic applications, together with future perspectives.
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Affiliation(s)
- Hansong Yu
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, United States
| | - Annemieke Janssen
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, 30332, United States
| | - Veronica Pawlik
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, 30332, United States
| | - Younan Xia
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia, 30332, United States
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia, 30332, United States
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2
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Zhao Z, Li Z, Huang J, Deng X, Jiang F, Han RPS, Tao Y, Xu S. A portable intelligent hydrogel platform for multicolor visual detection of HAase. Mikrochim Acta 2024; 191:101. [PMID: 38231363 DOI: 10.1007/s00604-024-06181-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 12/29/2023] [Indexed: 01/18/2024]
Abstract
Hyaluronidase (HAase) is an important endoglycosidase involved in numerous physiological and pathological processes, such as apoptosis, senescence, and cancer progression. Simple, convenient, and sensitive detection of HAase is important for clinical diagnosis. Herein, an easy-to-operate multicolor visual sensing strategy was developed for HAase determination. The proposed sensor was composed of an enzyme-responsive hydrogel and a nanochromogenic system (gold nanobipyramids (AuNBPs)). The enzyme-responsive hydrogel, formed by polyethyleneimine-hyaluronic acid (PEI-HA), was specifically hydrolyzed with HAase, leading to the release of platinum nanoparticles (PtNPs). Subsequently, PtNPs catalyzed the mixed system of 3,3',5,5'-tetramethylbenzidine (TMB) and H2O2 to produce TMB2+ under acidic conditions. Then, TMB2+ effectively etched the AuNBPs and resulted in morphological changes in the AuNBPs, accompanied by a blueshift in the localized surface plasmon resonance peak and vibrant colors. Therefore, HAase can be semiquantitatively determined by directly observing the color change of AuNBPs with the naked eye. On the basis of this, the method has a linear detection range of HAase concentrations between 0.6 and 40 U/mL, with a detection limit of 0.3 U/mL. In addition, our designed multicolor biosensor successfully detected the concentration of HAase in human serum samples. The results showed no obvious difference between this method and enzyme-linked immunosorbent assay, indicating the good accuracy and usability of the suggested method.
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Affiliation(s)
- Zhe Zhao
- Cancer Research Center& Jiangxi Engineering Research Center for Translational Cancer Technology, Jiangxi University of Chinese Medicine, Nanchang, 330004, Jiangxi, China
| | - Zhixin Li
- Institute for Advanced Study, Research Center for Differentiation and Development of TCM Basic Theory, Jiangxi University of Chinese Medicine, Nanchang, 330004, Jiangxi, China
| | - Jiahui Huang
- Cancer Research Center& Jiangxi Engineering Research Center for Translational Cancer Technology, Jiangxi University of Chinese Medicine, Nanchang, 330004, Jiangxi, China
| | - Xiaoyu Deng
- Ministry of Education Key Laboratory of Modern Preparation of Traditional Chinese Medicine, Jiangxi University of Chinese Medicine, Nanchang, 330004, Jiangxi, China
| | - Fan Jiang
- School of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, 330004, Jiangxi, China
| | - Ray P S Han
- Cancer Research Center& Jiangxi Engineering Research Center for Translational Cancer Technology, Jiangxi University of Chinese Medicine, Nanchang, 330004, Jiangxi, China.
| | - Yingzhou Tao
- Cancer Research Center& Jiangxi Engineering Research Center for Translational Cancer Technology, Jiangxi University of Chinese Medicine, Nanchang, 330004, Jiangxi, China.
| | - Shaohua Xu
- Cancer Research Center& Jiangxi Engineering Research Center for Translational Cancer Technology, Jiangxi University of Chinese Medicine, Nanchang, 330004, Jiangxi, China.
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3
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Qiao Z, Wei X, Liu H, Liu K, Gao C. Seed-Mediated Synthesis of Thin Gold Nanoplates with Tunable Edge Lengths and Optical Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:nano13040711. [PMID: 36839081 PMCID: PMC9961956 DOI: 10.3390/nano13040711] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/06/2023] [Accepted: 02/10/2023] [Indexed: 06/13/2023]
Abstract
Thin Au nanoplates show intriguing localized surface plasmon resonance (LSPR) properties with potential applications in various fields. The conventional synthesis of Au nanoplates usually involves the formation of spherical nanoparticles or produces nanoplates with large thicknesses. Herein, we demonstrate a synthesis of uniform thin Au nanoplates by using Au-Ag alloy nanoframes obtained by the galvanic replacement of Ag nanoplates with HAuCl4 as the seeds and a sulfite (SO32-) as a ligand. The SO32- ligand not only complexes with the Au salt for the controlled reduction kinetics but also strongly adsorbs on Au {111} facets for effectively constraining the crystal growth on both basal sides of the Au nanoplates for controlled shape and reduced thicknesses. This seed-mediated synthesis affords Au nanoplates with a thickness of only 7.5 nm, although the thickness increases with the edge length. The edge length can be customizable in a range of 48-167 nm, leading to tunable LSPR bands in the range of 600-1000 nm. These thin Au nanoplates are applicable not only to surface-enhanced Raman spectroscopy with enhanced sensitivity and reliability but also to a broader range of LSPR-based applications.
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Affiliation(s)
| | | | | | - Kai Liu
- Correspondence: (K.L.); (C.G.)
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4
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Le N, Boskovic TJM, Allard MM, Nick KE, Kwon SR, Perry CC. Gold Nanostar Characterization by Nanoparticle Tracking Analysis. ACS OMEGA 2022; 7:44677-44688. [PMID: 36530291 PMCID: PMC9753108 DOI: 10.1021/acsomega.2c03275] [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: 05/25/2022] [Accepted: 10/06/2022] [Indexed: 06/17/2023]
Abstract
We demonstrate the application of nanoparticle tracking analysis (NTA) for the quantitative characterization of gold nanostars (GNSs). GNSs were synthesized by the seed-mediated growth method using triblock copolymer (TBP) gold nanoparticles (GNPs). These GNPs (≈ 10 nm) were synthesized from Au3+ (≈ 1 mM) in aqueous F127 (w/v 5%) containing the co-reductant ascorbic acid (≈ 2 mM). The GNS tip-to-core aspect ratio (AR) decreased when higher concentrations of GNPs were added to the growth solution. The AR dependency of GNSs on Au3+/Au(seed) concentration ratio implies that growth is partly under kinetic control. NTA measured GNS sizes, concentrations, and relative scattering intensities. Molar absorption coefficients ∼ 109-1010 M-1 cm-1 (ε400 nm) for each batch of GNSs were determined using the combination of extinction spectra and NTA concentrations for heterogeneous samples. NTA in combination with UV-vis was used to derive the linear relationships: (1) hydrodynamic size versus localized surface plasmon peak maxima; (2) ε400 nm versus localized surface plasmon peak maxima; (3) ε400 nm versus hydrodynamic size. NTA for quantitative characterization of anisotropic nanoparticles could lead to future applications, including heterogeneous colloidal catalysis.
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Affiliation(s)
- Natasha
T. Le
- Department
of Basic Sciences, School of Medicine, Loma
Linda University, 11085 Campus Street, Loma Linda, California92350, United States
| | - Timothy J. M. Boskovic
- Department
of Basic Sciences, School of Medicine, Loma
Linda University, 11085 Campus Street, Loma Linda, California92350, United States
| | - Marco M. Allard
- Department
of Chemistry and Biochemistry, College of Arts and Sciences, La Sierra University, 4500 Riverwalk Parkway, Riverside, California92505, United States
| | - Kevin E. Nick
- Department
of Basic Sciences, School of Medicine, Loma
Linda University, 11085 Campus Street, Loma Linda, California92350, United States
| | - So Ran Kwon
- School
of Dentistry, Loma Linda University, 11092 Anderson Street, Loma Linda, California92350, United States
| | - Christopher C. Perry
- Department
of Basic Sciences, School of Medicine, Loma
Linda University, 11085 Campus Street, Loma Linda, California92350, United States
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5
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Ni Y, Kan C, Xu J. Optimized plasmonic performances and derivate applications of Au nanobipyramids. Phys Chem Chem Phys 2022; 24:21522-21537. [PMID: 36082804 DOI: 10.1039/d2cp02811e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Gold nanobipyramids (AuBPs) with narrow size distribution and high monodispersity have driven intensive attention because they display more advantageous plasmonic properties than gold nanorods (AuNRs). Applications of AuBPs based on tunable plasmonic properties and enhanced electromagnetic fields are being widely investigated in recent years. In this article, we focused on the preparation of well-defined AuBPs using the seed-mediated method, the plasmonic properties, and the exploration of AuBP-supported derivatives. The synergetic contributions of penta-twinned and appropriate growth environment could produce high-purity AuBPs. Systematic comparisons of plasmonic properties between AuBPs and AuNRs are illustrated. In addition, the well-defined AuBPs can be used as a template to synthesize multi-metallic nanostructures. The development of the epitaxial growth based on the AuBPs and corresponding applications are introduced. This study will provide a guide for the fabrication of composite nanostructures and advance their plasmonic applications.
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Affiliation(s)
- Yuan Ni
- College of Science, Jinling Institute of Technology, Nanjing 210016, China.
| | - Caixia Kan
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
| | - Juan Xu
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
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6
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Alle M, Sharma G, Lee SH, Kim JC. Next-generation engineered nanogold for multimodal cancer therapy and imaging: a clinical perspectives. J Nanobiotechnology 2022; 20:222. [PMID: 35778747 PMCID: PMC9250257 DOI: 10.1186/s12951-022-01402-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 03/28/2022] [Indexed: 12/12/2022] Open
Abstract
Cancer is one of the significant threats to human life. Although various latest technologies are currently available to treat cancer, it still accounts for millions of death each year worldwide. Thus, creating a need for more developed and novel technologies to combat this deadly condition. Nanoparticles-based cancer therapeutics have offered a promising approach to treat cancer effectively while minimizing adverse events. Among various nanoparticles, nanogold (AuNPs) are biocompatible and have proved their efficiency in treating cancer because they can reach tumors via enhanced permeability and retention effect. The size and shape of the AuNPs are responsible for their diverse therapeutic behavior. Thus, to modulate their therapeutic values, the AuNPs can be synthesized in various shapes, such as spheres, cages, flowers, shells, prisms, rods, clusters, etc. Also, attaching AuNPs with single or multiple targeting agents can facilitate the active targeting of AuNPs to the tumor tissue. The AuNPs have been much explored for photothermal therapy (PTT) to treat cancer. In addition to PTT, AuNPs-based nanoplatforms have been investigated for combinational multimodal therapies in the last few years, including photodynamic therapy, chemotherapy, radiotherapy, immunotherapy, etc., to ablate cancer cells. Thus, the present review focuses on the recent advancements in the functionalization of AuNPs-based nanoconstructs for cancer imaging and therapy using combinatorial multimodal approaches to treat various cancers.
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Affiliation(s)
- Madhusudhan Alle
- Institute of Forest Science, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Garima Sharma
- Department of Biomedical Science & Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea
| | - Seung-Hwan Lee
- Institute of Forest Science, Kangwon National University, Chuncheon, 24341, Republic of Korea.
- Department of Forest Biomaterials Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon, 24341, Republic of Korea.
| | - Jin-Chul Kim
- Department of Biomedical Science & Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, 24341, Republic of Korea.
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7
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Zhang T, Li X, Sun Y, Liu D, Li C, Cai W, Li Y. A universal route with fine kinetic control to a family of penta-twinned gold nanocrystals. Chem Sci 2021; 12:12631-12639. [PMID: 34703548 PMCID: PMC8494040 DOI: 10.1039/d1sc03040j] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 08/22/2021] [Indexed: 11/21/2022] Open
Abstract
Some of the major difficulties hindering the synthesis of different types of colloidal nanocrystals are their complex synthetic methods and the lack of a universal growth mechanism in one system. Herein, we propose a general strategy of kinetically controlled seed-mediated growth to synthesize a family of penta-twinned gold nanocrystals. Specifically, different kinds of penta-twinned nanocrystals (truncated penta-twinned decahedra, truncated bipyramids, bipyramids, truncated bipyramids with tips, star-like penta-twinned nanocrystals, decahedra with concave edges, and decahedra) with tunable sizes and high purity were readily achieved in one system solely by tailoring the deposition kinetics of adatoms on different sites of decahedral seeds. The controllable deposition kinetics can be realized by changing the ratio of reductant/gold precursors (R), which dictates whether horizontal or vertical features along the 5-fold axis direction of Au decahedral seeds are produced. Additionally, the selective growth of a second metal (silver) on penta-twinned gold seeds can be reached through minor modification of R, which opens a new avenue for mechanistic investigation by visualizing the seed localization within the final particles. The present work demonstrates a general paradigm for the kinetic growth of penta-twinned crystals and would be extended to the synthesis of other families of nanocrystals. We report the synthesis of linear ADPr oligomers of defined length up to a pentamer using an improved solid phase method. Binding study with human oncogenic helicase ALC1 shows that ADPr oligomers bind to ALC1 in a length-dependent manner.![]()
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Affiliation(s)
- Tao Zhang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences Hefei 230031 China
| | - Xuejiao Li
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences Hefei 230031 China .,University of Science and Technology of China Hefei 230026 P. R. China
| | - Yiqiang Sun
- School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Dilong Liu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences Hefei 230031 China
| | - Cuncheng Li
- School of Chemistry and Chemical Engineering, University of Jinan Jinan 250022 Shandong P. R. China
| | - Weiping Cai
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences Hefei 230031 China
| | - Yue Li
- Key Laboratory of Materials Physics, Institute of Solid State Physics, HFIPS, Chinese Academy of Sciences Hefei 230031 China
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8
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Surface lattice engineering for fine-tuned spatial configuration of nanocrystals. Nat Commun 2021; 12:5661. [PMID: 34580299 PMCID: PMC8476615 DOI: 10.1038/s41467-021-25969-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Accepted: 09/02/2021] [Indexed: 11/09/2022] Open
Abstract
Hybrid nanocrystals combining different properties together are important multifunctional materials that underpin further development in catalysis, energy storage, et al., and they are often constructed using heterogeneous seeded growth. Their spatial configuration (shape, composition, and dimension) is primarily determined by the heterogeneous deposition process which depends on the lattice mismatch between deposited material and seed. Precise control of nanocrystals spatial configuration is crucial to applications, but suffers from the limited tunability of lattice mismatch. Here, we demonstrate that surface lattice engineering can be used to break this bottleneck. Surface lattices of various Au nanocrystal seeds are fine-tuned using this strategy regardless of their shape, size, and crystalline structure, creating adjustable lattice mismatch for subsequent growth of other metals; hence, diverse hybrid nanocrystals with fine-tuned spatial configuration can be synthesized. This study may pave a general approach for rationally designing and constructing target nanocrystals including metal, semiconductor, and oxide.
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9
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Meena SK, Lerouge F, Baldeck P, Andraud C, Garavelli M, Parola S, Sulpizi M, Rivalta I. On the origin of controlled anisotropic growth of monodisperse gold nanobipyramids. NANOSCALE 2021; 13:15292-15300. [PMID: 34486622 DOI: 10.1039/d1nr01768c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We elucidate the crucial role of the cetyl trimethylammonium bromide (CTAB) surfactant in the anisotropic growth mechanism of gold nano-bipyramids, nano-objects with remarkable optical properties and high tunability. Atomistic molecular dynamics simulations predict different surface coverages of the CTAB (positively charged) heads and their (bromide) counterions as function of the gold exposed surfaces. High concentration of CTAB surfactant promotes formation of gold nanograins in solution that work as precursors for the smooth anisotropic growth of more elongated nano-bipyramidal objects. Nanobipyramids feature higher index facets with respect to nanorods, allowing higher CTAB coverages that stabilize their formation and leading to narrower inter-micelles channels that smooth down their anisotropic growth. Absorption spectroscopy and scanning electron microscopy confirmed the formation of nanograins and demonstrated the importance of surfactant concentration on driving the growth towards nano-bipyramids rather than nanorods. The outcome explains the formation of the monodisperse bipyramidal nano-objects, the origin of their controlled shapes and sizes along with their remarkable stability.
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Affiliation(s)
- Santosh Kumar Meena
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory (NCL), Dr. HomiBhabha Road, Pune-411008, India.
| | - Frederic Lerouge
- Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratoire de Chimie, F69342, Lyon, France
| | - Patrice Baldeck
- Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratoire de Chimie, F69342, Lyon, France
| | - Chantal Andraud
- Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratoire de Chimie, F69342, Lyon, France
| | - Marco Garavelli
- Dipartimento di Chimica Industriale "Toso Montanari", Universitá degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy.
| | - Stephane Parola
- Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratoire de Chimie, F69342, Lyon, France
| | - Marialore Sulpizi
- Institute of Physics, Johannes Gutenberg University Mainz, Staudingerweg 7, 55099 Mainz, Germany.
| | - Ivan Rivalta
- Dipartimento di Chimica Industriale "Toso Montanari", Universitá degli Studi di Bologna, Viale del Risorgimento 4, I-40136 Bologna, Italy.
- Univ Lyon, Ens de Lyon, CNRS UMR 5182, Université Claude Bernard Lyon 1, Laboratoire de Chimie, F69342, Lyon, France
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10
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Comparison of visual detection of melamine by AuNPs sol prepared in marine and terrestrial plant extracts. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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11
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Synthesis of penta-fold twinned Pd-Au-Pd segmental nanorods for in situ monitoring catalytic reaction. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125490] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Huang XB, Wu SH, Hu HC, Sun JJ. AuNanostar@4-MBA@Au Core-Shell Nanostructure Coupled with Exonuclease III-Assisted Cycling Amplification for Ultrasensitive SERS Detection of Ochratoxin A. ACS Sens 2020; 5:2636-2643. [PMID: 32786384 DOI: 10.1021/acssensors.0c01162] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The "turn-on" mode surface-enhanced Raman scattering (SERS) aptasensor for ultrasensitive ochratoxin A (OTA) detection was developed based on the SERS "hot spots" of AuNanostar@4-MBA@Au core-shell nanostructures (AuNS@4-MBA@Au) and exonuclease III (Exo III)-assisted target cycle amplification strategy. Compared with conventional gold nanoparticles, AuNS@4-MBA@Au provides a much higher SERS enhancement factor because AuNS exhibits a larger surface roughness and the lightning rod effect, as well as an excellent electromagnetic field between the AuNS core and the Au shell, which contribute to the superstrong SERS signal. Meanwhile, Exo III-assisted target cycle amplification can be used as an effective method for the further amplified detection of OTA. Additionally, the utilization of streptavidin magnesphere paramagnetic particles offers a green, economical, and facile technology for the accumulation and separation of the signal probe AuNS@4-MBA@Au from solution. All these factors lead to a significant enhancement of detectable signals and superhigh sensitivity. As a result, the limit of detection as low as 0.25 fg mL-1 could be achieved, which was lower than that in the other reported literatures on SERS methods for OTA detection as we know. The developed SERS aptasensor also provides a promising tool for foodstuff detection.
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Affiliation(s)
- Xiao-Bin Huang
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Shao-Hua Wu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Hao-Cheng Hu
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
| | - Jian-Jun Sun
- Ministry of Education Key Laboratory for Analytical Science of Food Safety and Biology, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, College of Chemistry, Fuzhou University, Fuzhou, Fujian 350108, China
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13
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Sow C, Sarma A, Schropp A, Dzhigaev D, Keller TF, Schroer CG, Sanyal MK, Kulkarni GU. Unraveling the Spatial Distribution of Catalytic Non-Cubic Au Phases in a Bipyramidal Microcrystallite by X-ray Diffraction Microscopy. ACS NANO 2020; 14:9456-9465. [PMID: 32491827 DOI: 10.1021/acsnano.0c02031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Tuning of crystal structures and shapes of submicrometer-sized noble metals have revealed fascinating catalytic, optical, electrical, and magnetic properties that enable developments of environmentally friendly and durable nanotechnological applications. Several attempts have been made to stabilize Au, knowing its extraordinary stability in its conventional face-centered cubic (fcc) lattice, into different lattices, particularly to develop Au-based catalysis for industry. Here, we report the results from scanning X-ray diffraction microscopy (SXDM) measurements on an ambient-stable penta-twinned bipyramidal Au microcrystallite (about 1.36 μm in length and 230 nm in diameter) stabilized in noncubic lattice, exhibiting catalytic properties. With more than 82% of the crystal volume, the majority crystallite structure is identified as body-centered orthorhombic (bco), while the remainder is the standard fcc. A careful analysis of the diffraction maps reveals that the tips are made up of fcc, while the body contains mainly bco with very high strain. The reported structural imaging technique of representative single crystallite will be useful to investigate the growth mechanism of similar multiphase nano- and micrometer-sized crystals.
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Affiliation(s)
- Chaitali Sow
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore 560064, India
| | - Abhisakh Sarma
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Andreas Schropp
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Dmitry Dzhigaev
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
| | - Thomas F Keller
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
- Physics Department, Universität Hamburg, D-20355 Hamburg, Germany
| | - Christian G Schroer
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, D-22607 Hamburg, Germany
- Physics Department, Universität Hamburg, D-20355 Hamburg, Germany
| | - Milan K Sanyal
- Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064, India
| | - Giridhar U Kulkarni
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Jakkur P.O., Bangalore 560064, India
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14
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Li Q, Hang L, Jiang W, Dou J, Xiao L, Tang X, Yao Y, Wang Y. Pre- and post-irradiation mild hyperthermia enabled by NIR-II for sensitizing radiotherapy. Biomaterials 2020; 257:120235. [PMID: 32736260 DOI: 10.1016/j.biomaterials.2020.120235] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 07/10/2020] [Accepted: 07/12/2020] [Indexed: 12/20/2022]
Abstract
The clinical application of cancer radiotherapy is critically impeded by hypoxia-induced radioresistance, insufficient DNA damage, and multiple DNA repair mechanisms. Herein we demonstrate a dual-hyperthermia strategy to potentiate radiotherapy by relieving tumor hypoxia and preventing irradiation-induced DNA damage repair. The tumor hyperthermia temperature was well-controlled by a near infrared laser with minimal side effects using PEGylated nanobipyramids (PNBys) as the photo-transducer. PNBys have narrow longitudinal localized surface plasmon resonance peak in NIR-II window with a high extinction coefficient (2.0 × 1011 M-1 cm-1) and an excellent photothermal conversion efficiency (44.2%). PNBys-induced mild hyperthermia (MHt) prior to radiotherapy enables vessel dilation, blood perfusion, and hypoxia relief, resulting in an increased susceptibility of tumor cells response to radiotherapy. On the other hand, MHt after radiotherapy inhibits the repair of DNA damage generated by irradiation. The PNBys exert hierarchically superior antitumor effects by the combination of MHt pre- and post-radiotherapy in murine mammary tumor EMT-6 model. Consequently, different from the simple combination of RT and MHt, the coupling of pre- and post-MHt with RT by PNBys open intriguing avenues towards new promising antitumor efficacy.
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Affiliation(s)
- Quan Li
- Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China; Guangzhou Women and Children's Medical Center, Guangzhou, 510623, China
| | - Lifeng Hang
- Intelligent Nanomedicine Institute, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, China; The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China
| | - Wei Jiang
- Intelligent Nanomedicine Institute, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, China; The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China
| | - Jiaxiang Dou
- Intelligent Nanomedicine Institute, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, China; The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China
| | - Liang Xiao
- Department of Radiotherapy, The First Affiliated Hospital of Anhui Medical University, Hefei, 230022, China
| | - Xinfeng Tang
- Intelligent Nanomedicine Institute, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, China
| | - Yandan Yao
- Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, 510120, China.
| | - Yucai Wang
- Intelligent Nanomedicine Institute, The First Affiliated Hospital of University of Science and Technology of China, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230001, China; The CAS Key Laboratory of Innate Immunity and Chronic Disease, School of Life Sciences and Medical Center, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230027, China.
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15
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Liang X, Yang Y, Zou C, Chen W, Zou HX, Yang Y. Au decahedra with High yield for the improved synthesis of Au nanobipyramids. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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16
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Li C, Mei E, Chen C, Li Y, Nugasur B, Hou L, Ding X, Hu M, Zhang Y, Su Z, Lin J, Yang Y, Huang P, Li Z. Gold-Nanobipyramid-Based Nanotheranostics for Dual-Modality Imaging-Guided Phototherapy. ACS APPLIED MATERIALS & INTERFACES 2020; 12:12541-12548. [PMID: 32083461 DOI: 10.1021/acsami.0c00112] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Multimodality imaging-guided therapy can improve the diagnostics and therapeutics efficiency of cancer. Herein, we developed a light-responsive nanotheranostic agent based on the indocyanine green (ICG) conjugated mesoporous silica coated gold nanobipyramid (GNB@SiO2) (denoted as GNB@SiO2-ICG) for simultaneous fluorescence (FL)/photoacoustic (PA) imaging-guided photothermal therapy (PTT). The GNB@SiO2 with excellent photostability was used for PA imaging as well as PTT. The loaded ICG promised FL imaging and PTT. The feasibility of the cancer theranostic capability of GNB@SiO2-ICG was evaluated from cancer cells to mice. Under the guidance of FL/PA imaging, GNB@SiO2-ICG exhibited remarkably enhanced therapeutic efficacy, which could eliminate the tumor tissues completely without tumor recurrence. This well-defined nanotheranostic nanoplatform that intelligently integrates dual-modality imaging and phototherapy provides an efficient nanoplatform for cancer nanotheranostics.
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Affiliation(s)
- Chunxiao Li
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
- Institute of Photomedicine, Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200092, China
| | - Enci Mei
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Cunguo Chen
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Yashi Li
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Bhawneeta Nugasur
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Liyue Hou
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Xiaoxia Ding
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Murong Hu
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Yifan Zhang
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Zhongqian Su
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
| | - Jing Lin
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Yun Yang
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, China
| | - Peng Huang
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Health Science Center, Shenzhen 518060, China
| | - Zhiming Li
- Department of Dermatology and Venereology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang 325000, China
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17
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Sasikumar T, Ilanchelian M. Colorimetric and visual detection of cyanide ions based on the morphological transformation of gold nanobipyramids into gold nanoparticles. NEW J CHEM 2020. [DOI: 10.1039/c9nj05929f] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we developed a facile, rapid, selective and sensitive colorimetric method for the detection of cyanide ions (CN−) by using gold nanobipyramids (Au NBPs).
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18
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Wang H, Rao H, Luo M, Xue X, Xue Z, Lu X. Noble metal nanoparticles growth-based colorimetric strategies: From monocolorimetric to multicolorimetric sensors. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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19
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Chateau D, Desert A, Lerouge F, Landaburu G, Santucci S, Parola S. Beyond the Concentration Limitation in the Synthesis of Nanobipyramids and Other Pentatwinned Gold Nanostructures. ACS APPLIED MATERIALS & INTERFACES 2019; 11:39068-39076. [PMID: 31564089 DOI: 10.1021/acsami.9b12973] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Gold nanoparticles offer unique optoelectronic properties relevant for a wide range of processes and products, in biology and medicine (therapeutic agents, diagnostic, drug delivery), as well as in electronics, photovoltaics, and catalysis. So far, various synthesis methods proposed have led to rather limited concentration and purity of the colloidal suspensions, severely hindering their use. Here, we present a simple and versatile procedure for the synthesis of gold pentatwinned nanostructures, including nanobipyramids based on a seed-mediated growth process that overcomes the concentration limitations of current methods by 2 orders of magnitude. Moreover, our novel process offers quantitative yields while easily allowing a fine control of the particles' shape, size (with a high monodispersity), and plasmonic properties. Finally, we demonstrate that our method can be easily upscaled to produce large amounts of nanostructures, up to the gram scale, with minimal waste and postprocessing, thus facilitating their use for further applications and industrial developments.
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Affiliation(s)
- Denis Chateau
- Laboratoire de Chimie, Université de Lyon, École Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182 , 46 allée d'Italie , 69364 Lyon , France
- Laboratoire de Physique, École Normale Supérieure de Lyon, CNRS UMR 5672 , 46 allée d'Italie , 69364 Lyon , France
| | - Anthony Desert
- Laboratoire de Chimie, Université de Lyon, École Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182 , 46 allée d'Italie , 69364 Lyon , France
| | - Frédéric Lerouge
- Laboratoire de Chimie, Université de Lyon, École Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182 , 46 allée d'Italie , 69364 Lyon , France
| | - Guillaume Landaburu
- Laboratoire de Chimie, Université de Lyon, École Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182 , 46 allée d'Italie , 69364 Lyon , France
| | - Stéphane Santucci
- Laboratoire de Physique, École Normale Supérieure de Lyon, CNRS UMR 5672 , 46 allée d'Italie , 69364 Lyon , France
| | - Stephane Parola
- Laboratoire de Chimie, Université de Lyon, École Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, CNRS UMR 5182 , 46 allée d'Italie , 69364 Lyon , France
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20
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Yang L, Zhou Z, Song J, Chen X. Anisotropic nanomaterials for shape-dependent physicochemical and biomedical applications. Chem Soc Rev 2019; 48:5140-5176. [PMID: 31464313 PMCID: PMC6768714 DOI: 10.1039/c9cs00011a] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review contributes towards a systematic understanding of the mechanism of shape-dependent effects on nanoparticles (NPs) for elaborating and predicting their properties and applications based on the past two decades of research. Recently, the significance of shape-dependent physical chemistry and biomedicine has drawn ever increasing attention. While there has been a great deal of effort to utilize NPs with different morphologies in these fields, so far research studies are largely localized in particular materials, synthetic methods, or biomedical applications, and have ignored the interactional and interdependent relationships of these areas. This review is a comprehensive description of the NP shapes from theory, synthesis, property to application. We figure out the roles that shape plays in the properties of different kinds of nanomaterials together with physicochemical and biomedical applications. Through systematic elaboration of these shape-dependent impacts, better utilization of nanomaterials with diverse morphologies would be realized and definite strategies would be expected for breakthroughs in these fields. In addition, we have proposed some critical challenges and open problems that need to be addressed in nanotechnology.
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Affiliation(s)
- Lijiao Yang
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China. and Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Zijian Zhou
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Jibin Song
- MOE Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine, National Institute of Biomedical Imaging and Bioengineering, National Institutes of Health, Bethesda, MD 20892, USA.
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21
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Chow TH, Li N, Bai X, Zhuo X, Shao L, Wang J. Gold Nanobipyramids: An Emerging and Versatile Type of Plasmonic Nanoparticles. Acc Chem Res 2019; 52:2136-2146. [PMID: 31368690 DOI: 10.1021/acs.accounts.9b00230] [Citation(s) in RCA: 81] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Gold nanobipyramids (Au NBPs) and gold nanorods (Au NRs) are two types of elongated plasmonic nanoparticles with their longitudinal dipolar plasmon wavelengths synthetically tunable from the visible region to the near-infrared region. Both have highly polarization-dependent absorption and scattering cross sections because of their anisotropic geometries. In terms of their differences, each Au NBP has five equally angularly separated twinning planes that are aligned parallel to the length direction, while the most common Au NRs are single-crystalline. As a result, Au NBPs possess two sharp end tips, while Au NRs have rounded or flat ends, resulting in very different plasmonic properties. In general, Au NBPs exhibit larger local electric field enhancements, larger optical cross sections, narrower line widths, better shape and size uniformity, and higher refractive index sensitivity than Au NRs. With the recent development of reliable methods for the growth of Au NBPs with high purity and uniformity, Au NBPs have been attracting much interest for the investigation of their intriguing plasmonic properties and applications. In this Account, we provide a concise introduction to Au NBPs, including their fascinating plasmonic properties, wet-chemistry growth methods, plasmonic applications, and structure-directing function. The synthesis of uniform Au NBPs with variable sizes is of vital importance to control their plasmonic properties. In the synthesis part, we summarize the recent developments on the synthesis of Au NBPs, with a focus on the role of seeds in the seed-mediated growth of pentatwinned Au NBPs and methods to improve their number purity. The excellent plasmonic properties of Au NBPs make them promising candidates for numerous applications. To further explore the largely improved functionalities of Au NBPs, different types of Au-NBP-based hybrid nanostructures have been prepared. They exhibit synergistic interactions between Au NBPs and the other components. We highlight the widespread plasmonic applications of Au NBPs and Au-NBP-based hybrid nanostructures in the fields of spectroscopy, photocatalysis, sensing, switching, and biomedical technologies. We next turn to the structure-directing function of Au NBPs to demonstrate the Au-NBP-directed growth of metal nanostructures and their applications. The structure-directing function is enabled by the unique pentatwinned crystalline structure of Au NBPs. Finally, we conclude with remarks on the future perspectives and research directions on Au NBPs as well as the remaining challenges. We hope that this Account will act as a platform to offer fascinating opportunities and stimulate fast-growing research on the various aspects of Au NBPs.
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Affiliation(s)
- Tsz Him Chow
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Nannan Li
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Xiaopeng Bai
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Xiaolu Zhuo
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Lei Shao
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Jianfang Wang
- Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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22
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Wang J, Zhuo X, Xiao X, Mao R, Wang Y, Wang J, Liu J. AlPcS-loaded gold nanobipyramids with high two-photon efficiency for photodynamic therapy in vivo. NANOSCALE 2019; 11:3386-3395. [PMID: 30724954 DOI: 10.1039/c9nr00004f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Recent years have witnessed significant progress in the field of two-photon-activated photodynamic therapy (TP-PDT). However, traditional photosensitizer (PS)-based TP-PDT remains a critical challenge in clinics due to its low two-photon absorption cross sections. Here, we propose that the therapeutic activity of the current photosensitizer, sulfonated Al-phthalocyanine (AlPcS), can be efficiently excited via plasmonic-resonance energy transfer from the two-photon excited gold nanobipyramids (GBPs) and further generates cytotoxic singlet oxygen for cancer eradication. GBPs possess large two-photon absorption cross sections, excellent photostability, and biocompatibility, which can be used for a high two-photon light-harvesting material in biomedical applications. We compared the in vitro and in vivo capabilities of AlPcS-loaded GBPs as a TP-PDT agent for theranostic applications by benchmarking them against those of the extensively studied gold nanospheres (GNS) and nanorods (GNR). Although all these Au nanostructures could cause enhanced PS two-photon excitation fluorescence and improved singlet oxygen generation capability via the plasmonic resonance-energy transfer process, GBP-AlPcS exhibited the highest two-photon efficiency for photodynamic therapy. Remarkably, in vivo experiment results clearly indicated that the GBP-AlPcS caused efficient suppression of tumor growth and minimal adverse effects on orthotopic A549 human lung tumor xenografts. The system presents great efficiency in improving the treatment depth and precision of traditional photodynamic therapy.
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Affiliation(s)
- Jing Wang
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
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23
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Singh P, König TAF, Jaiswal A. NIR-Active Plasmonic Gold Nanocapsules Synthesized Using Thermally Induced Seed Twinning for Surface-Enhanced Raman Scattering Applications. ACS APPLIED MATERIALS & INTERFACES 2018; 10:39380-39390. [PMID: 30345737 DOI: 10.1021/acsami.8b14445] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hollow and porous core-shell nanostructures with defined interior nanogaps are of great significance in the field of surface-enhanced Raman scattering (SERS) applications because of the presence of intrinsic electromagnetic (EM) hot spots, multipolar resonances, and multiple facets. Further, nanomaterials having extinction in the near-infrared (NIR) region are particularly important for SERS and biomedical applications, and thus it is highly desirable to synthesize NIR-active plasmonic nanostructures. Herein, we report the synthesis of gold nanocapsules having a solid Au bead as core and a thin-porous rod-shaped shell with extinction in both NIR I and NIR II regions. Thermally induced twinned seeds were used for the silver-free synthesis of pentatwinned Au bead, which served as the foundation for the directed growth of Ag nanorods, which was finally converted to Au nanocapsules following galvanic replacement reaction (GRR). Detailed investigation was carried out to understand the effect of thermal treatment duration in the seed morphology and its subsequent growth to anisotropic Au beads. Ag overgrowth on Au beads yielded uniform Au-bead@Ag nanorods whose size can be tuned by varying the Ag precursor. Five different sized Au-bead@Ag nanorods were studied, and they were converted to Au nanocapsules following GRR. We explored the size-dependent SERS activity of the prepared Au nanocapsules along with their comparison with solid pentatwinned Au beads and found that the smallest sized Au nanocapsules were the best SERS performers. Finite-difference time-domain simulation revealed the presence of intense EM hot spots in the smallest sized Au nanocapsule and corroborated the experimental SERS data. Finally, we fabricated a simple flexible cellulose-based SERS substrate by using the smallest sized Au nanocapsules and investigated its SERS sensing ability for the detection of 2-napthalenethiol (2-NT), as a model analyte, and were able to achieve its detection down to 1 fM concentration.
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Affiliation(s)
- Prem Singh
- School of Basic Sciences , Indian Institute of Technology Mandi , Kamand, Mandi 175005 , Himachal Pradesh , India
| | - Tobias A F König
- Leibniz-Institut für Polymerforschung Dresden e.V., Institute of Physical Chemistry and Polymer Physics , Hohe Str. 6 , Dresden D-01069 , Germany
- Cluster of Excellence Centre for Advancing Electronics Dresden (CFAED) , Technische Universität Dresden , Dresden D-01062 , Germany
| | - Amit Jaiswal
- School of Basic Sciences , Indian Institute of Technology Mandi , Kamand, Mandi 175005 , Himachal Pradesh , India
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24
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Wang W, Yu P, Zhong Z, Tong X, Liu T, Li Y, Ashalley E, Chen H, Wu J, Wang Z. Size-dependent longitudinal plasmon resonance wavelength and extraordinary scattering properties of Au nanobipyramids. NANOTECHNOLOGY 2018; 29:355402. [PMID: 29882742 DOI: 10.1088/1361-6528/aacb5d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Au nanobipyramids (NBPs) with sharp tips and narrow plasmon linewidths are ideal candidates for plasmonic applications. In this paper, we investigated the influencing factors of longitudinal plasmon resonance wavelength (LPRW) and scattering properties of single Au NBP by simulation. Compared with the volume, we establish the aspect ratio (length/width) as the dominant factor that affects the LPRW of Au NBPs. Plasmonic nanoparticles have been widely used for light-trapping enhancement in photovoltaics. To give a profound understanding of the superior light harvesting properties of Au NBPs, the near-field localization effect and far-field scattering mechanism of Au NBPs were investigated. Under the light injection at LPRW, the tip area shows near-field enhancement and the maximum scattering intensity appears on the side area of the waist owing to the remarkable optical absorption near the tips. Additionally, we confirm the fraction of light scattered into the substrate and angular distribution of the light scattered by the Au NBPs. The fraction of light scattered into the substrate reaches up to 97% from 400-1100 nm and preserves a broadband spectrum. This suggests that the NBP has a predominant forward scattering and reduced backward scattering. The excellent plasmonic scattering properties of Au NBPs are promising in photovoltaic devices and photothermal therapy.
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Affiliation(s)
- Wenhao Wang
- State Key Laboratory of Electronic Thin Film and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China. Institute of Fundamental and Frontier Science, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China
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25
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Niu W, Duan Y, Qing Z, Huang H, Lu X. Shaping Gold Nanocrystals in Dimethyl Sulfoxide: Toward Trapezohedral and Bipyramidal Nanocrystals Enclosed by {311} Facets. J Am Chem Soc 2017; 139:5817-5826. [DOI: 10.1021/jacs.7b00036] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Wenxin Niu
- School
of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Yukun Duan
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585 Singapore
| | - Zikun Qing
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585 Singapore
| | - Hejin Huang
- Department
of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, 117585 Singapore
| | - Xianmao Lu
- Beijing
Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
- National Center for Nanoscience and Technology (NCNST), Beijing 100190, China
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26
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Singh MK, Mukherjee B, Mandal RK. Growth morphology and special diffraction characteristics of multifaceted gold nanoparticles. Micron 2017; 94:46-52. [PMID: 28049098 DOI: 10.1016/j.micron.2016.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2016] [Revised: 12/10/2016] [Accepted: 12/10/2016] [Indexed: 10/20/2022]
Abstract
This paper deals with morphology of synthesized nano gold particles through seed based growth. Various types of morphologies have been observed. They primarily relate to decahedral and truncated tetrahedral shapes. Their relative abundance is dependent on temporal evolution of nanoparticles. These shapes are understood to have evolved from a seed having symmetry that is a supergroup of the point groups possessed by these nanoparticles. The usual pentagonal twinned morphologies observed under High Resolution Transmission Electron Microscopy have displayed two distinct types of interfaces. They have been attributed to cubic and icosahedral three-fold orientations. Such a discussion is lacking in literature. The five triangular faces of decahedral particles are essentially rotational twins resulting out of a common five-fold axis. Two special diffraction features for truncated tetrahedral particles have been observed. They refer to (i) triangular streaks around Braggs spots conforming to three fold symmetry of these particles and (ii) by observation of forbidden reflections of the type 1/3{422} and 2/3{422} along 〈422〉 directions. Latter has been understood in terms of intrinsic fault whereas former arises owing to shape transform of nanoparticles. The presence of faults has helped rationalize decrease of lattice parameter vis-à-vis that of standard FCC gold. The variation of intensities of these forbidden reflections seems to be arising out of density of such intrinsic faults in nano gold particles in addition to dynamical effects.
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Affiliation(s)
- Manish Kumar Singh
- Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221105, Uttar Pradesh, India
| | - Bratindranath Mukherjee
- Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221105, Uttar Pradesh, India
| | - Rajiv Kumar Mandal
- Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221105, Uttar Pradesh, India.
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27
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Liu F, Ni J, Hao H, Wang W, Chen W, Zhang L, Zou C, Yang Y, Huang S. Rational selection of halide ions for synthesizing highly active Au@Pd nanobipyramids. RSC Adv 2017. [DOI: 10.1039/c7ra05407f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Highly active Au@Pd nanobipyramids were synthesized using Br− ions as an appropriate growth modifier.
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Affiliation(s)
- Fangyan Liu
- Nanomaterials and Chemistry Key Laboratory
- Wenzhou University
- Wenzhou
- P. R. China
| | - Jia Ni
- Nanomaterials and Chemistry Key Laboratory
- Wenzhou University
- Wenzhou
- P. R. China
| | - Hui Hao
- Nanomaterials and Chemistry Key Laboratory
- Wenzhou University
- Wenzhou
- P. R. China
| | - Wei Wang
- Department of Chemistry
- University of Bergen
- Bergen
- Norway
| | - Wei Chen
- Nanomaterials and Chemistry Key Laboratory
- Wenzhou University
- Wenzhou
- P. R. China
| | - Lijie Zhang
- Nanomaterials and Chemistry Key Laboratory
- Wenzhou University
- Wenzhou
- P. R. China
| | - Chao Zou
- Nanomaterials and Chemistry Key Laboratory
- Wenzhou University
- Wenzhou
- P. R. China
| | - Yun Yang
- Nanomaterials and Chemistry Key Laboratory
- Wenzhou University
- Wenzhou
- P. R. China
| | - Shaoming Huang
- Nanomaterials and Chemistry Key Laboratory
- Wenzhou University
- Wenzhou
- P. R. China
- School of Materials and Energy
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28
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Xia Y, Gilroy KD, Peng H, Xia X. Keimvermitteltes Wachstum kolloidaler Metallnanokristalle. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201604731] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
- School of Chemistry and Biochemistry School of Chemical and Biomolecular Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Kyle D. Gilroy
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
| | - Hsin‐Chieh Peng
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
| | - Xiaohu Xia
- The Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University Atlanta GA 30332 USA
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29
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Xia Y, Gilroy KD, Peng HC, Xia X. Seed-Mediated Growth of Colloidal Metal Nanocrystals. Angew Chem Int Ed Engl 2016; 56:60-95. [PMID: 27966807 DOI: 10.1002/anie.201604731] [Citation(s) in RCA: 371] [Impact Index Per Article: 46.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 06/18/2016] [Indexed: 11/08/2022]
Abstract
Seed-mediated growth is a powerful and versatile approach for the synthesis of colloidal metal nanocrystals. The vast allure of this approach mainly stems from the staggering degree of control one can achieve over the size, shape, composition, and structure of nanocrystals. These parameters not only control the properties of nanocrystals but also determine their relevance to, and performance in, various applications. The ingenuity and artistry inherent to seed-mediated growth offer extensive promise, enhancing a number of existing applications and opening the door to new developments. This Review demonstrates how the diversity of metal nanocrystals can be expanded with endless opportunities by using seeds with well-defined and controllable internal structures in conjunction with a proper combination of capping agent and reduction kinetics. New capabilities and future directions are also highlighted.
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Affiliation(s)
- Younan Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA.,School of Chemistry and Biochemistry, School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Kyle D Gilroy
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Hsin-Chieh Peng
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
| | - Xiaohu Xia
- The Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
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30
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Fang C, Zhao G, Xiao Y, Zhao J, Zhang Z, Geng B. Facile Growth of High-Yield Gold Nanobipyramids Induced by Chloroplatinic Acid for High Refractive Index Sensing Properties. Sci Rep 2016; 6:36706. [PMID: 27841289 PMCID: PMC5107934 DOI: 10.1038/srep36706] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Accepted: 10/19/2016] [Indexed: 11/09/2022] Open
Abstract
Au nanobipyramids (NBPs) have attracted great attention because of their unique localized surface plasmon resonance properties. However, the current growth methods always have low yield or suffer tedious process. Developing new ways to direct synthesis of high-yield Au NBPs using common agents is therefore desirable. Here, we employed chloroplatinic acid as the key shape-directing agent for the first time to grow Au NBPs using a modified seed-mediated method at room temperature. H2PtCl6 was added both during the seed preparation and in growth solution. Metallic Pt, reduced from chloroplatinic acid, will deposit on the surface of the seed nanoparticles and the Au nanocrystals and thus plays a critical role for the formation of Au NBPs. Additionally, the reductant, precursor, and surfactant are all cheap and commonly used. Furthermore, the Au NBPs offer narrow size distribution, two sharp tips, and a shared basis. Au NBPs therefore show much higher refractive index sensitivities than that of the Au nanorods. The refractive index sensitivities and lager figure of merit values of Au NBPs exhibit an increase of 63% and 321% respectively compared to the corresponding values of Au nanorod sample.
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Affiliation(s)
- Caihong Fang
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu in Anhui Province 241000 China
| | - Guili Zhao
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu in Anhui Province 241000 China
| | - Yanling Xiao
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu in Anhui Province 241000 China
| | - Jun Zhao
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu in Anhui Province 241000 China
| | - Zijun Zhang
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu in Anhui Province 241000 China
| | - Baoyou Geng
- College of Chemistry and Materials Science, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecular-Based Materials, Anhui Normal University, Wuhu in Anhui Province 241000 China
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31
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Shi Q, Si KJ, Sikdar D, Yap LW, Premaratne M, Cheng W. Two-Dimensional Bipyramid Plasmonic Nanoparticle Liquid Crystalline Superstructure with Four Distinct Orientational Packing Orders. ACS NANO 2016; 10:967-976. [PMID: 26731313 DOI: 10.1021/acsnano.5b06206] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Anisotropic plasmonic nanoparticles have been successfully used as constituent elements for growing ordered nanoparticle arrays. However, orientational control over their spatial ordering remains challenging. Here, we report on a self-assembled two-dimensional (2D) nanoparticle liquid crystalline superstructure (NLCS) from bipyramid gold nanoparticles (BNPs), which showed four distinct orientational packing orders, corresponding to horizontal alignment (H-NLCS), circular arrangement (C-NLCS), slanted alignment (S-NLCS), and vertical alignment (V-NLCS) of constituent particle building elements. These packing orders are characteristic of the unique shape of BNPs because all four packing modes were observed for particles with various sizes. Nevertheless, only H-NLCS and V-NLCS packing orders were observed for the free-standing ordered array nanosheets formed from a drying-mediated self-assembly at the air/water interface of a sessile droplet. This is due to strong surface tension and the absence of particle-substrate interaction. In addition, we found the collective plasmonic coupling properties mainly depend on the packing type, and characteristic coupling peak locations depend on particle sizes. Interestingly, surface-enhanced Raman scattering (SERS) enhancements were heavily dependent on the orientational packing ordering. In particular, V-NLCS showed the highest Raman enhancement factor, which was about 77-fold greater than the H-NLCS and about 19-fold greater than C-NLCS. The results presented here reveal the nature and significance of orientational ordering in controlling plasmonic coupling and SERS enhancements of ordered plasmonic nanoparticle arrays.
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Affiliation(s)
- Qianqian Shi
- The Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton 3168, Victoria, Australia
| | - Kae Jye Si
- The Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton 3168, Victoria, Australia
| | | | - Lim Wei Yap
- The Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton 3168, Victoria, Australia
| | | | - Wenlong Cheng
- The Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton 3168, Victoria, Australia
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32
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Lee JH, Gibson KJ, Chen G, Weizmann Y. Bipyramid-templated synthesis of monodisperse anisotropic gold nanocrystals. Nat Commun 2015; 6:7571. [PMID: 26113393 PMCID: PMC4491807 DOI: 10.1038/ncomms8571] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Accepted: 05/19/2015] [Indexed: 12/23/2022] Open
Abstract
Much of the interest in noble metal nanoparticles is due to their plasmonic resonance responses and local field enhancement, both of which can be tuned through the size and shape of the particles. However, both properties suffer from the loss of monodispersity that is frequently associated with various morphologies of nanoparticles. Here we show a method to generate diverse and monodisperse anisotropic gold nanoparticle shapes with various tip geometries as well as highly tunable size augmentations through either oxidative etching or seed-mediated growth of purified, monodisperse gold bipyramids. The conditions employed in the etching and growth processes also offer valuable insights into the growth mechanism difficult to realize with other gold nanostructures. The high-index facets and more complicated structure of the bipyramid lead to a wider variety of intriguing regrowth structures than in previously studied nanoparticles. Our results introduce a class of gold bipyramid-based nanoparticles with interesting and potentially useful features to the toolbox of gold nanoparticles. Tuning the morphology of nanoparticles can alter their optical properties but often at the cost of monodispersity. Here, the authors report the synthesis of monodisperse anisotropic gold nanoparticles with various tip geometries as well as highly tunable size augmentations from purified gold bipyramids.
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Affiliation(s)
- Jung-Hoon Lee
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA
| | - Kyle J Gibson
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA
| | - Gang Chen
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA
| | - Yossi Weizmann
- Department of Chemistry, The University of Chicago, 929 East 57th Street, Chicago, Illinois 60637, USA
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33
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Goubet N, Tempra I, Yang J, Soavi G, Polli D, Cerullo G, Pileni MP. Size and nanocrystallinity controlled gold nanocrystals: synthesis, electronic and mechanical properties. NANOSCALE 2015; 7:3237-3246. [PMID: 25619359 DOI: 10.1039/c4nr06513a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The influence of nanocrystallinity on the electronic and mechanical properties of metal nanoparticles is still poorly understood, due to the difficulty in synthesizing nanoparticles with a controlled internal structure. Here, we report on a new method for the selective synthesis of Au nanoparticles in either a single-domain or a polycrystalline phase maintaining the same chemical environment. We obtain quasi-spherical nanoparticles whose diameter is tunable from 6 to 13 nm with a resolution down to ≈0.5 nm and narrow size distribution (4-5%). The availability of such high-quality samples allows the study of the impact of the particle size and nanocrystallinity on a number of parameters, such as plasmon dephasing time, electron-phonon coupling, period and damping time of the radial breathing modes.
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Affiliation(s)
- N Goubet
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8233, MONARIS, F-75005, Paris, France.
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Chateau D, Liotta A, Vadcard F, Navarro JRG, Chaput F, Lermé J, Lerouge F, Parola S. From gold nanobipyramids to nanojavelins for a precise tuning of the plasmon resonance to the infrared wavelengths: experimental and theoretical aspects. NANOSCALE 2015; 7:1934-43. [PMID: 25530122 DOI: 10.1039/c4nr06323f] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Anisotropic gold nanoparticles and in particular with shapes exhibiting tips are known to present an extremely strong localized electromagnetic field. This field is mostly located at the top of the tips and can be used in various optical applications. Moreover, as a consequence of their anisotropy, they present two plasmon resonance bands corresponding to the transverse and longitudinal resonance modes. Tuning the aspect ratio it becomes possible to display SPR bands near the near infrared region. This was particularly investigated in the case of nanorods and also for bipyramids. In this paper we report a high yield synthesis approach that allows one to precisely control the aspect ratio of bipyramids and to elongate the structure until they adopt a javelin-like aspect. We were able to prepare nano-javelins with surface plasmon resonances up to 1850 nm, opening important perspectives in terms of optical applications in the NIR and IR regions. The synthetic methods are fully reported and the optical properties were correlated with the theoretical approach, taking into consideration not only the aspect ratio but also the truncation of the nano-objects.
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Affiliation(s)
- D Chateau
- Ecole Normale Supérieure de Lyon, CNRS, Université Lyon 1, Laboratoire de Chimie UMR 5182, 46, allée d'Italie, F-69364, Lyon cedex 07, France.
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35
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Zhou L, Liu Z, Zhang H, Cheng S, Fan LJ, Ma W. Site-specific growth of AgPd nanodendrites on highly purified Au bipyramids with remarkable catalytic performance. NANOSCALE 2014; 6:12971-12980. [PMID: 25232660 DOI: 10.1039/c4nr04190a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Au nanorods have been extensively explored in various applications as the template for heterogeneous metallic nanostructures. However, Au bipyramids (AuBPs) have been paid much less attention although they possess an intriguing crystalline structure and extremely superior plasmonic properties which are absent in AuNRs. The state-of-the-art synthesis cannot produce pure AuBPs, which has become a major barrier to their various applications like catalysis since purity is often critical for achieving the desired performance. Herein, we have shown a facile approach to obtain large-scale high-purity AuBPs. The purity of AuBPs can be improved from 30 to 50% for the as-synthesized AuBP solution to over 95% for the purified solution. Site-specific growth of AgPd nanodendrites on multiply twinned AuBPs from core-shell to tipped nanostructures was achieved for the first time by coupling a galvanic replacement with a co-reduction process, which show remarkable catalytic activity in the reduction reaction of 4-nitrophenol (4-NP) by NaBH4. The use of ascorbic acid (AA) as a reductant in the co-reduction process and the intriguing crystalline structure of AuBPs play a critical role in forming these unique structures. We believe that this work would provide a general strategy to prepare high-purity AuBP based trimetallic nanostructures, which offers the opportunity for AuBPs to be widely used in catalysis or other plasmonic-effect related applications in the near future.
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Affiliation(s)
- Lin Zhou
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu, China.
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