1
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Yang Y, Jia H, Hu N, Zhao M, Li J, Ni W, Zhang CY. Construction of Gold/Rhodium Freestanding Superstructures as Antenna-Reactor Photocatalysts for Plasmon-Driven Nitrogen Fixation. J Am Chem Soc 2024; 146:7734-7742. [PMID: 38447042 DOI: 10.1021/jacs.3c14586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Precisely controlling the architecture and spatial arrangement of plasmonic heterostructures offers unique opportunities to tailor the catalytic property, whereas the lack of a wet-chemistry synthetic approach to fabricating nanostructures with high-index facets limits their practical applications. Herein, we describe a universal synthetic strategy to construct Au/Rh freestanding superstructures (SSs) through the selective growth of ordered Rh nanoarrays on high-index-faceted Au nanobipyramids (NBPs). This synthetic strategy works on various metal nanocrystal substrates and can yield diverse Au/Rh and Pd/Rh SSs. Especially, the obtained Au NBP/Rh SSs exhibit high photocatalytic activity toward N2 fixation as a result of the spatially separated architecture, local electric field enhancement, and the antenna-reactor mechanism. Both theoretical and experimental results reveal that the Au NBPs can function as nanoantennas for light-harvesting to generate hot charge carriers for driving N2 fixation, while the Rh nanoarrays can serve as the active sites for N2 adsorption and activation to synergistically promote the overall catalytic activity in the Au NBP/Rh SSs. This work offers new avenues to rationally designing and constructing spatially separated plasmonic photocatalysts for high-efficiency catalytic applications.
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Affiliation(s)
- Yuanyuan Yang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
| | - Henglei Jia
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
| | - Ningneng Hu
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - Mengxuan Zhao
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
| | - Jingzhao Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, China
| | - Weihai Ni
- Jiangsu Key Laboratory of Thin Films, School of Physical Science and Technology, Soochow University, Suzhou 215006, China
| | - Chun-Yang Zhang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
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Jiang L, Wang X, Zhou J, Fu Q, Lv B, Sun Y, Song L, Huang Y. Plasmonic Multi-Layered Built-in Hotspots Nanogaps for Effectively Activating Analytes. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2306125. [PMID: 38044318 PMCID: PMC10870027 DOI: 10.1002/advs.202306125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/20/2023] [Indexed: 12/05/2023]
Abstract
Multi-layered plasmonic nanostructures are able to highly promote the near-field confinement and effectively activate analytes, which are of predominate significance but are extremely challenging. Herein, the semi-open Au core@carved AuAg multi-shell superstructure nanoparticles (multi-Au@Ag-Au NPs, multi = mono, bi, tri, tetra, and penta) are reported with a high designability on electromagnetic field and capability of effectively capturing analytes. By controlling synthetic parameters such as the number of galvanic exchange and Ag growth, multi-Au@Ag-Au NPs are successfully obtained, with tunable layer numbers and asymmetric nanoholes. Due to collective plasmon oscillations of multi-layered built-in nanogaps, the electromagnetic field strength of a single penta-Au@Ag-Au entity reach 48841. More importantly, the penta-Au@Ag-Au NPs show a remarkable light-harvesting capability, which is adaptive to different Raman lasers, supporting high-diversity detection. Additionally, the structural specificity allows analytes to be sufficiently captured into interior hotspots, and further achieve highly sensitive detection with limit of detection down to 3.22 × 10-12 M. This study not only provides an effective pathway for integrating abundant hotspots and activating target molecules in single plasmonic superstructure, but stimulates advancements in SERS substrates for various applications.
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Affiliation(s)
- Lei Jiang
- College of MaterialChemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhouZhejiang311121China
| | - Xiaoyuan Wang
- College of MaterialChemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhouZhejiang311121China
| | - Jingyi Zhou
- College of MaterialChemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhouZhejiang311121China
| | - Qianqian Fu
- College of MaterialChemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhouZhejiang311121China
| | - Bihu Lv
- Department of Scientific Facilities Development and ManagementZhejiang LaboratoryHangzhou311100China
| | - Yixuan Sun
- Department of Scientific Facilities Development and ManagementZhejiang LaboratoryHangzhou311100China
| | - Liping Song
- College of MaterialChemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhouZhejiang311121China
| | - Youju Huang
- College of MaterialChemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhouZhejiang311121China
- Laboratory for Functional Molecules MaterialsWestlake UniversityHangzhouZhejiang310030China
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He Z, Zhu J, Li X, Weng GJ, Li JJ, Zhao JW. Au@Ag Nanopencil with Au Tip and Au@Ag Rod: Multimodality Plasmonic Nanoprobe based on Asymmetric Etching for the Detection of SCN - and ClO . SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302302. [PMID: 37211700 DOI: 10.1002/smll.202302302] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 04/26/2023] [Indexed: 05/23/2023]
Abstract
In this paper, Au@Ag nanopencil is designed as a multimodality plasmonic nanoprobe based on asymmetric etching for the detection of SCN- and ClO- . Au@Ag nanopencil with Au tip and Au@Ag rod is prepared by asymmetric tailoring of uniformly grown silver-covered gold nanopyramids under the combined effect of partial galvanic replacement and redox reaction. By asymmetric etching in different systems, Au@Ag nanopencil exhibits diversified changes in the plasmonic absorption band: O2 •- facilitated by SCN- etches Au@Ag rod from the end to the tip, causing a blue shift of the localized surface plasmon resonance (LSPR) peak as the aspect ratio decreases; while the ClO- can retain Au@Ag shell and etch Ag within rod from the tip to the end, causing a redshift of the LSPR peak as the coupling resonance weakens. Based on peak shifts in different directions, a multimodality detection of SCN- and ClO- has been established. The results demonstrate the detection limits of SCN- and ClO- are 160 and 6.7 nm, and the linear ranges are 1-600 µm and 0.05-13 µm, respectively. The finely designed Au@Ag nanopencil not only broadens the horizon of designing heterogeneous structures, but also enriches the strategy of constructing multimodality sensing platform.
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Affiliation(s)
- Zhao He
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
| | - Jian Zhu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
| | - Xin Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
| | - Guo-Jun Weng
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
| | - Jian-Jun Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
| | - Jun-Wu Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
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Li X, Min Y, Liu F, Liu M, Zheng Y. Glutathione-Mediated Synthesis of Yolk-Shell AuAg Nanostructures Containing a Spherical Core and Cuboctahedral Skeletons and Their Applications in Plasmonic Catalysis. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:11788-11796. [PMID: 37567582 DOI: 10.1021/acs.langmuir.3c01506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2023]
Abstract
Frame/skeleton-like nanostructures are of great value in plasmonic catalysis as a result of the synergetic structural advantages arising from both maximized surface atomic exposure and efficient incident light absorptions. Herein, we report the size-tunable fabrication of yolk-shell AuAg nanoparticles containing a spherical core and cuboctahedral skeletons (AuAg YSCNSs), together with the exploration of their applications for assisting the reduction of 4-nitrophenol (4-NP) under ultraviolet-visible (UV-vis) light irradiation. The use of glutathione (GSH) at an appropriate amount to mediate the galvanic replacement reaction between Au@Ag core-shell nanocubes and HAuCl4 is found to be crucial in regulating the shape evolution. Their sizes could be readily tuned by altering the edge lengths of Au@Ag core-shell nanocubes. When working as the photocatalyst assisting the reduction of 4-NP, the AuAg YSCNSs exhibit a higher apparent rate constant under UV-vis light irradiation. The current work demonstrates the feasibility to create skeleton-like noble metal nanocrystals with the shape largely deviated from that of the original template via the "top-down" carving strategy by introducing non-metallic surface doping, which could be potentially extended to other noble metals or alloys.
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Affiliation(s)
- Xiaoyu Li
- School of Chemistry, Chemical Engineering, and Materials, Jining University, Qufu, Shandong 273155, People's Republic of China
| | - Yuanyuan Min
- School of Chemistry, Chemical Engineering, and Materials, Jining University, Qufu, Shandong 273155, People's Republic of China
| | - Feng Liu
- International Research Center for Renewable Energy, National Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
| | - Maochang Liu
- International Research Center for Renewable Energy, National Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, People's Republic of China
| | - Yiqun Zheng
- School of Chemistry, Chemical Engineering, and Materials, Jining University, Qufu, Shandong 273155, People's Republic of China
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Jia H, Li F, Yang Y, Zhao M, Li J, Zhang CY. Steric hindrance-induced selective growth of rhodium on gold nanobipyramids for plasmon-enhanced nitrogen fixation. Chem Sci 2023; 14:5656-5664. [PMID: 37265735 PMCID: PMC10231337 DOI: 10.1039/d3sc00081h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/30/2023] [Indexed: 06/03/2023] Open
Abstract
The construction of an antenna-reactor plasmonic photocatalyst that is composed of a plasmonic and a catalytically active metal holds great promise in driving N2 photofixation, but its photocatalytic performance is highly dependent on the spatial distribution of the two components. Up to now, the fabrication of dumbbell-shaped nanostructures featuring spatially separated architecture has remained challenging. Herein, we develop a facile synthetic strategy for the site-selective growth of a Rh nanocrystal 'reactor' on two tips of an Au nanobipyramid (NBP) 'antenna' through the precise manipulation of steric hindrance toward Rh overgrowth. The obtained Au NBP/tip-Rh nanodumbbells (Au NBP/tip-Rh NDs) can function as an excellent antenna-reactor plasmonic photocatalyst for N2 photofixation. In this scenario, the Au nanoantenna harvests light and generates hot electrons under plasmon resonance, meanwhile the hot electrons are transferred to the active sites on Rh nanocrystals for N2 reduction. In comparison with that of classical core@shell nanostructures, the spatially separated architecture of the Au NBP/tip-Rh NDs facilitates charge separation, greatly improving the photocatalytic activity. This study sheds new light on the structure-function relationship for N2 photofixation and benefits the design and construction of spatially separated plasmonic photocatalysts.
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Affiliation(s)
- Henglei Jia
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University Jinan 250014 China
| | - Fan Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University Jinan 250014 China
| | - Yuanyuan Yang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University Jinan 250014 China
| | - Mengxuan Zhao
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University Jinan 250014 China
| | - Jingzhao Li
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University Jinan 250014 China
| | - Chun-Yang Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University Jinan 250014 China
- School of Chemistry and Chemical Engineering, Southeast University Nanjing 211189 China
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Zhou Y, Lu Y, Liu Y, Hu X, Chen H. Current strategies of plasmonic nanoparticles assisted surface-enhanced Raman scattering toward biosensor studies. Biosens Bioelectron 2023; 228:115231. [PMID: 36934607 DOI: 10.1016/j.bios.2023.115231] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 02/21/2023] [Accepted: 03/12/2023] [Indexed: 03/15/2023]
Abstract
With the progressive nanofabrication technology, plasmonic nanoparticles (PNPs) have been increasingly deployed in the field of biosensing. PNPs have favorable biocompatibility, conductivity, and tunable optical properties. In addition, the localized surface plasmon resonance (LSPR) of PNPs plays a vital role in surface-enhanced Raman scattering (SERS). PNPs-based SERS biosensing enables wide-ranging applications for sensitive detection and high spatial and temporal resolution imaging. Numerous reviews of PNPs in the field of SERS biosensing highlight the fabrication or applications in one or more fields. However, the specific strategies for the SERS biosensor construction had not been summarized systematically. Thus, this work offers a comprehensive overview of SERS enhancement strategies based on PNPs, with a focus on SERS label-free detection along with label detection sensing construction, as well as its challenges and future trends.
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Affiliation(s)
- Yangyang Zhou
- School of Medicine, Shanghai University, Shanghai, 200444, PR China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Yongkai Lu
- School of Life Sciences, Shanghai University, Shanghai, 200444, PR China
| | - Yawen Liu
- School of Medicine, Shanghai University, Shanghai, 200444, PR China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, PR China
| | - Xiaojun Hu
- School of Life Sciences, Shanghai University, Shanghai, 200444, PR China
| | - Hongxia Chen
- School of Life Sciences, Shanghai University, Shanghai, 200444, PR China.
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Xu J, Xu H, Xu L, Ruan Q, Zhu X, Kan C, Shi D. Plasmonic and catalytic Au NBP@AgPd nanoframes for highly efficient photocatalytic reactions. Phys Chem Chem Phys 2023; 25:13189-13197. [PMID: 37129667 DOI: 10.1039/d3cp01153d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Heterogeneous metal nanostructures with excellent plasmonic performance and catalytic activity are urgently needed to realize efficient light-driven catalysis. Herein, we demonstrate the preparation of hollow Au nanobipyramid (NBP)@AgPd nanostructures by employing Au NBP@Ag nanorods as templates. The products could transform from Au NBP@AgPd nanoframes to nanocages, along with the redshift and broadening of the plasmon wavelength. Particularly, the plasmon intensity of these nanostructures remained considerable among the shape evolution process. Based on the selective absorption of CTAB, the Ag atoms on the side surfaces of the Au NBP@Ag nanorods were employed as the sacrificial templates to reduce Pd atoms through galvanic replacement. The reduced Pd and Ag atoms produced through the reduction reaction were preferably co-deposited on the corners and edges at the early stage and later deposited directly on the defect sites of the side facets, as more Ag atoms were released. The discontinued distribution of the Pd atoms gives an opportunity to etch away the Ag atoms in the cores, leading to the formation of hollow Au NBP@AgPd nanostructures after the etching process. It is worth noting that the deposition of the ultrathin AgPd nanoframe had little influence on the plasmonic properties of Au NBPs, as verified by electrodynamic simulations. The Au NBP@AgPd nanoframe showed great photocatalytic activity toward Suzuki coupling reactions under laser irradiation. Taken together, these results suggest that the hot electrons successfully transfer from Au NBP to the AgPd nanoframes to participate in the photocatalytic reactions. This study affords a promising route for the synthesis of anisotropic bimetallic nanostructures with excellent plasmonic performances.
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Affiliation(s)
- Juan Xu
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
| | - Haiying Xu
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- College of Mathematics and Physics, Nanjing Institute of Technology, Nanjing, 211167, China
| | - Lihui Xu
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
| | - Qifeng Ruan
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372, Singapore
| | - Xingzhong Zhu
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- MIIT Key Laboratory of Aerospace Information Materials and Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
| | - Caixia Kan
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- MIIT Key Laboratory of Aerospace Information Materials and Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
| | - Daning Shi
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- MIIT Key Laboratory of Aerospace Information Materials and Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China
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Jiang Y, Sharma A, Cronin L. An Accelerated Method for Investigating Spectral Properties of Dynamically Evolving Nanostructures. J Phys Chem Lett 2023; 14:3929-3938. [PMID: 37078273 PMCID: PMC10150391 DOI: 10.1021/acs.jpclett.3c00395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
The discrete-dipole approximation (DDA) is widely applied to study the spectral properties of plasmonic nanostructures. However, the high computational cost limits the application of DDA in static geometries, making it impractical for investigating spectral properties during structural transformations. Here we developed an efficient method to simulate spectra of dynamically evolving structures by formulating an iterative calculation process based on the rank-one decomposition of matrices and DDA. By representing structural transformation as the change of dipoles and their properties, the updated polarizations can be computed efficiently. The improvement in computational efficiency was benchmarked, demonstrating up to several hundred times acceleration for a system comprising ca. 4000 dipoles. The rank-one decomposition accelerated DDA method (RD-DDA) can be used directly to investigate the optical properties of nanostructural transformations defined by atomic- or continuum-scale processes, which is essential for understanding the growth mechanisms of nanoparticles and algorithm-driven structural optimization toward enhanced optical properties.
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Affiliation(s)
- Yibin Jiang
- School of Chemistry, University of Glasgow, University Avenue, Glasgow G12 8QQ U.K
| | - Abhishek Sharma
- School of Chemistry, University of Glasgow, University Avenue, Glasgow G12 8QQ U.K
| | - Leroy Cronin
- School of Chemistry, University of Glasgow, University Avenue, Glasgow G12 8QQ U.K
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Zhang B, Zhang W, Luo J, He J, Rong B, Zheng X, Zhu S, Xu X, Ai Y, Zhang L, He T. Action Mechanism of Extracts from Cerasus serrulata Flower for Hair-Blacking in C57BL/6 Mice. Pharmacogn Mag 2023. [DOI: 10.1177/09731296231157182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
Abstract
Background Hair color retention and rejuvenation have recently emerged as a new research hot spot, with many studies focused on developing treatments to prevent premature greying. Aim This study is aimed to explore the hair-blacking effects and possible mechanisms of Cerasus serrulata flower extracts (CSE) using a C57BL/6 premature greying mouse model. Materials and Methods The variations in hair follicle number, hair follicle depth and cortical thickness were evaluated by hematoxylin and eosin staining. The quantity changes of melanocytes were also evaluated using Masson-Fontana Melanin staining. The relative abundance of vascular endothelial growth factor (VEGF), β-catenin and tyrosinase transcripts following transformed growth were further quantified using RT-qPCR and immunofluorescence. The changes in protein level expression of β-catenin, VEGF and tyrosinase were also evaluated by western blot. Results The β-catenin and VEGF expression were significantly up-regulated in skin tissues treated with C. serrulata extracts, promoting hair growth and blackening. Conclusion CSE can promote the efficient hair-blacking likely via the VEGF pathway, making it a potential therapeutic candidate for treating premature greying.
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Affiliation(s)
- Bing Zhang
- Guangdong He Ji Biotech Co., Ltd., Guangzhou, PR China
| | - Wenyun Zhang
- Guangdong He Ji Biotech Co., Ltd., Guangzhou, PR China
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
| | - Jianfang Luo
- Guangdong He Ji Biotech Co., Ltd., Guangzhou, PR China
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
| | - Jian He
- Guangdong He Ji Biotech Co., Ltd., Guangzhou, PR China
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
| | - Baoshan Rong
- Guangdong He Ji Biotech Co., Ltd., Guangzhou, PR China
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
| | - Xiaomin Zheng
- Guangdong He Ji Biotech Co., Ltd., Guangzhou, PR China
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
| | - Siyang Zhu
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
| | - Xian Xu
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
| | - Yong Ai
- Guangdong He Ji Biotech Co., Ltd., Guangzhou, PR China
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
| | - Lanyue Zhang
- Guangdong Provincial Key Laboratory of Plant Resources Biorefinery, Medicine Food Homology Engineering Center of Guangdong Province, Institute of Natural Medicine and Green Chemistry, School of Biomedical and Pharmaceutical Sciences, Guangdong University of Technology, Guangzhou, PR China
| | - Tinggang He
- Hua An Tang Biotech Group Co., Ltd., Guangzhou, PR China
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10
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Xu J, Zhu X, Xu L, Kan C, Shi D. Template-directed growth of Ag nanostructures: soft templates versus hard templates. NANOSCALE 2023; 15:1687-1694. [PMID: 36594633 DOI: 10.1039/d2nr05667d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Hard template-directed growth methods present a compelling route for the synthesis of Ag nanostructures with precise size control. Meanwhile, soft template methods are effective and flexible for the synthesis of Ag nanostructures with various morphologies. However, the role of the soft template is ambiguous and obviously neglected in hard template-directed growth processes due to the strong confinement effect of the hard template, limiting the diversity of Ag nanostructures that can be obtained. Herein, we design Au nanoframes with deformable head structures as a hard template while using cetyltrimethylammonium chloride as a soft template, to direct the growth of Ag atoms on Au nanobipyramid seeds. When using the Au nanoframes with a closed head, the longitudinal growth of the Ag atoms is clearly limited by the hard template, leading to the formation of thick Ag nanorods with a five-fold twinned structure. The soft template starts to influence the growth process when the head structure of the Au nanoframes becomes hollow. In particular, the confinement effect of the hard template can be completely broken by selectively strengthening the role of the soft template, promoting the production of slender Ag nanorods similar to the results obtained in the absence of the hard template. Our results indicate that the morphology of the Ag nanostructures depends on the competition between the qualitatively confined energies of the hard and soft templates during the template-directed growth process. Moreover, this confined growth mechanism is also verified by the successful construction of various Ag nanostructures. The understanding of the collaborative competition mechanism between the soft and hard templates presents a great opportunity to construct novel Ag nanostructures through a template-directed method.
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Affiliation(s)
- Juan Xu
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
| | - Xingzhong Zhu
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
| | - Lihui Xu
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
| | - Caixia Kan
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
| | - Daning Shi
- College of Physics, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
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11
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Cao A, Tan J, Liu D, Chen Z, Dou L, Liu Z, Li Y. Mass-determining role in the electrophoretic separation of colloidal plasmonic nanoparticle oligomers. NANOSCALE 2022; 14:14161-14168. [PMID: 36111667 DOI: 10.1039/d2nr03585e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Gel electrophoresis techniques have been commonly applied in sieving plasmonic nanoparticle oligomers, while the intrinsic role in determining their phoresis velocity differences through the gel remains debatable. In this work, we explore the components and yield in each gel band after bundling two rationally designed types of nanoparticles in a system for electrophoretic separation. All results indicate that the mass property of plasmonic oligomers plays an essential role in determining their phoresis velocity divergences during separation. Further theoretical simulations reveal that the grounds for the mass-determining role stemmed from the random inelastic collisions among the oligomers and the gel-network microchannel. Moreover, under the guidance of such a mass-determining role, it is easy to achieve the direct electrophoretic separation of hetero-structured plasmonic dimers with high purity and high yield. This work will not only facilitate the precise nano-engineering of complex plasmonic oligomers with unique optical properties, but also might remove the obstacles toward their industrial manufacture with high purity.
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Affiliation(s)
- An Cao
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Jingyi Tan
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Dilong Liu
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Zhiming Chen
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China
- University of Science and Technology of China, Hefei 230026, P. R. China
| | - Liguang Dou
- Beijing International S&T Cooperation Base for Plasma Science and Energy Conversion, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Zhiqiang Liu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, P. R. China
| | - Yue Li
- Key Lab of Materials Physics, Anhui Key Lab of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China
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12
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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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13
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Xia C, He W, Yang XF, Gao PF, Zhen SJ, Li YF, Huang CZ. Plasmonic Hot-Electron-Painted Au@Pt Nanoparticles as Efficient Electrocatalysts for Detection of H 2O 2. Anal Chem 2022; 94:13440-13446. [PMID: 36130106 DOI: 10.1021/acs.analchem.2c02434] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Plasmon-driven catalysis of metal nanostructures has garnered wide interest. Here, a photogenerated plasmonic hot-electron painting strategy was reported to form Au@Pt composite nanoparticles (Au@Pt NPs) with high catalytic reactivity without using reducing agents. Au nanoparticles, including Au nanospheres (Au NSs), Au nanorods (Au NRs), and Au nanobipyramids (Au NBPs), generated hot electrons under localized surface plasmon resonance (LSPR) excitation, which made the platinum precursor reduced as a consequence that Pt(0) atoms were painted on the surface of Au NPs to form an asymmetric Pt shell outside the plasmonic Au core. Compared with bare Au NPs, Au@Pt NPs exhibited significantly enhanced electrocatalytic activity toward reduction of H2O2 due to the bimetallic synergistic effect and great dispersion of Au@Pt NP-modified indium tin oxide (Au@Pt NPs/ITO). It exhibited a linear detection of H2O2 in a wide concentration range from 0.5 to 1000 μM with a low detection limit of 0.11 μM (S/N = 3). Therefore, the plasmonic hot-electron-painted Au@Pt NPs represent a novel and simple method for the design of advanced noble asymmetric metal nanomaterials.
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Affiliation(s)
- Chang Xia
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Wei He
- Key Laboratory of Luminescent and Real-Time Analytical System (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P. R. China
| | - Xiao Feng Yang
- Key Laboratory of Luminescent and Real-Time Analytical System (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P. R. China
| | - Peng Fei Gao
- Key Laboratory of Luminescent and Real-Time Analytical System (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P. R. China
| | - Shu Jun Zhen
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Yuan Fang Li
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China
| | - Cheng Zhi Huang
- Key Laboratory of Luminescent and Real-Time Analytical System (Southwest University), Chongqing Science and Technology Bureau, College of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P. R. China
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14
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Hilal H, Zhao Q, Kim J, Lee S, Haddadnezhad M, Yoo S, Lee S, Park W, Park W, Lee J, Lee JW, Jung I, Park S. Three-dimensional nanoframes with dual rims as nanoprobes for biosensing. Nat Commun 2022; 13:4813. [PMID: 35974015 PMCID: PMC9381508 DOI: 10.1038/s41467-022-32549-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 08/01/2022] [Indexed: 11/23/2022] Open
Abstract
Three-dimensional (3D) nanoframe structures are very appealing because their inner voids and ridges interact efficiently with light and analytes, allowing for effective optical-based sensing. However, the realization of complex nanoframe architecture with high yield is challenging because the systematic design of such a complicated nanostructure lacks an appropriate synthesis protocol. Here, we show the synthesis method for complex 3D nanoframes wherein two-dimensional (2D) dual-rim nanostructures are engraved on each facet of octahedral nanoframes. The synthetic scheme proceeds through multiple executable on-demand steps. With Au octahedral nanoparticles as a sacrificial template, sequential processes of edge-selective Pt deposition and inner Au etching lead to Pt octahedral mono-rim nanoframes. Then, adlayers of Au are grown on Pt skeletons via the Frank-van der Merwe mode, forming sharp and well-developed edges. Next, Pt selective deposition on both the inner and outer boundaries leads to tunable geometric patterning on Au. Finally, after the selective etching of Au, Pt octahedral dual-rim nanoframes with highly homogeneous size and shape are achieved. In order to endow plasmonic features, Au is coated around Pt frames while retaining their geometric shape. The resultant plasmonic dual-rim engraved nanoframes possess strong light entrapping capability verified by single-particle surface-enhanced Raman scattering (SERS) and show the potential of nanoprobes for biosensing through SERS-based immunoassay. Most SERS-active nanostructures suffer from low robustness against misalignment to field polarization. Here, the authors demonstrate three-dimensional nanoframes of octahedral geometry, with two rims engraved on each facet, as polarization-independent SERS nanoprobes.
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Affiliation(s)
- Hajir Hilal
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Qiang Zhao
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Jeongwon Kim
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Sungwoo Lee
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | | | - Sungjae Yoo
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Soohyun Lee
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Woongkyu Park
- Medical & Bio Photonics Research Center, Korea Photonics Technology Institute (KOPTI), Gwangju, 61007, Republic of Korea
| | - Woocheol Park
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Jaewon Lee
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Joong Wook Lee
- Department of Physics and Optoelectronics Convergence Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Insub Jung
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea. .,Department of Chemistry and Institute of Basic Science, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea.
| | - Sungho Park
- Department of Chemistry, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea.
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15
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Yoo S, Lee J, Hilal H, Jung I, Park W, Lee JW, Choi S, Park S. Nesting of multiple polyhedral plasmonic nanoframes into a single entity. Nat Commun 2022; 13:4544. [PMID: 35927265 PMCID: PMC9352762 DOI: 10.1038/s41467-022-32261-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Accepted: 07/21/2022] [Indexed: 11/09/2022] Open
Abstract
The development of plasmonic nanostructures with intricate nanoframe morphologies has attracted considerable interest for improving catalytic and optical properties. However, arranging multiple nanoframes in one nanostructure especially, in a solution phase remains a great challenge. Herein, we show complex nanoparticles by embedding various shapes of three-dimensional polyhedral nanoframes within a single entity through rationally designed synthetic pathways. This synthetic strategy is based on the selective deposition of platinum atoms on high surface energy facets and subsequent growth into solid platonic nanoparticles, followed by the etching of inner Au domains, leaving complex nanoframes. Our synthetic routes are rationally designed and executable on-demand with a high structural controllability. Diverse Au solid nanostructures (octahedra, truncated octahedra, cuboctahedra, and cubes) evolved into complex multi-layered nanoframes with different numbers/shapes/sizes of internal nanoframes. After coating the surface of the nanoframes with plasmonically active metal (like Ag), the materials exhibited highly enhanced electromagnetic near-field focusing embedded within the internal complicated rim architecture. The spatial configuration of nanostructure building blocks determines the physical and optical properties of their superstructures. Here, the authors report on complex nanoparticles in which different geometric forms of nanoframes are nested into a single entity by multistep chemical reactions.
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Affiliation(s)
- Sungjae Yoo
- Research Institute for Nano Bio Convergence, Sungkyunkwan University, Suwon, 16419, Republic of Korea.,Department of Chemistry, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jaewon Lee
- Department of Chemistry, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Hajir Hilal
- Department of Chemistry, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Insub Jung
- Department of Chemistry, Sungkyunkwan University, Suwon, 16419, Republic of Korea.,Institute of Basic Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Woongkyu Park
- Medical & Bio Photonics Research Center, Korea Photonics Technology Institute (KOPTI), Gwangju, 61007, Republic of Korea
| | - Joong Wook Lee
- Department of Physics and Optoelectronics Convergence Research Center, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Soobong Choi
- Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea
| | - Sungho Park
- Department of Chemistry, Sungkyunkwan University, Suwon, 16419, Republic of Korea.
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16
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He Z, Zhu J, Li X, Weng GJ, Li JJ, Zhao JW. Surface etching-dependent geometry tailoring and multi-spectral information of Au@AuAg yolk-shell nanostructure with asymmetrical pyramidal core: The application in Co 2+ determination. J Colloid Interface Sci 2022; 625:340-353. [PMID: 35717848 DOI: 10.1016/j.jcis.2022.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/31/2022] [Accepted: 06/04/2022] [Indexed: 10/31/2022]
Abstract
In this paper, a novel Au@AuAg yolk-shell heterogeneous nanostructure is designed as plasmonic spectroscopic sensor based on surface etching for ultrasensitive detection of trace cobalt ions (Co2+). Due to the surface diffusion of gold atoms, the Ag at one end of the core gold nanobipyramids (Au NBPs) is retained, and Au@AuAg yolk-shell nanostructure with asymmetric core is prepared. The alloy shell is coupled to Au NBPs and the interface of asymmetric Ag respectively, the two local surface plasmon resonance bands will have obvious reverse changes depending on the surface morphology of the shell. By using this distinct plasmon response generated by Co2+ induced surface etching, which is driven by discrepancy of double-peaks, a sensing method has been established to realize multi-information spectral detection of Co2+. There is a good linear relationship between the intensity ratio and the Co2+ concentration in the range of 1-100 nM, in which the limit of detection is 0.2 nM. This method further improves the sensing capability by combining multiple pieces of strongly changing spectral information, and demonstrates great advantages and potential of Au@AuAg yolk-shell heterogeneous nanostructure as a multi-information plasmonic sensor based on etched shell surface for trace detection.
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Affiliation(s)
- Zhao He
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jian Zhu
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Xin Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Guo-Jun Weng
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jian-Jun Li
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jun-Wu Zhao
- The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
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17
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Hanqi B, Xu J, Zhu X, Kan C. Gold nanobipyramids doped with Au/Pd alloyed nanoclusters for high efficiency ethanol electrooxidation. NANOSCALE ADVANCES 2022; 4:1827-1834. [PMID: 36132164 PMCID: PMC9417086 DOI: 10.1039/d1na00878a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 03/03/2022] [Indexed: 06/15/2023]
Abstract
Plasmonic metal nanostructures are of great interest due to their excellent physicochemical properties and promising applications in a wide range of technical fields. Among metal nanostructures, bimetallic nanostructures with desired morphologies, such as core-shell, uniform alloy and surface decoration, are of great interest due to their improved properties and superior synergetic effects. In this paper, Au/Pd nanoclusters were deposited on the surface of gold nanobipyramids (AuBPs) into a core-shell nanostructure (AuBP@Au x Pd1-x ) through a reductive co-precipitation method. The AuBP@Au x Pd1-x nanostructure integrates effectively the advantages of plasmonic AuBPs and catalytic Pd ultrafine nanoclusters, as well as the stable Au/Pd alloy shell. The AuBP@Au x Pd1-x nanostructure exhibits superior electrocatalytic activity and durability for oxygen reduction in alkaline media owing to the synergistic effect between the AuBP core and Au/Pd shell. Furthermore, the shell thickness of AuBP@Au x Pd1-x nanostructures can be adjusted by varying the amount of precursor. Overall, the catalytic activity of bimetallic Au/Pd catalysts is likely to be governed by a complex interplay of contributions from the particle size and shape.
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Affiliation(s)
- Baihe Hanqi
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
| | - Juan Xu
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
| | - Xingzhong Zhu
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
- MIIT Key Laboratory of Aerospace Information Materials and Physics, Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
| | - Caixia Kan
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
- MIIT Key Laboratory of Aerospace Information Materials and Physics, Nanjing University of Aeronautics and Astronautics Nanjing 211106 China
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18
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Johnson HM, Dasher AM, Monahan M, Seifert S, Moreau LM. Mapping the effects of physical and chemical reduction parameters on local atomic distributions within bimetallic nanoparticles. NANOSCALE 2022; 14:4519-4530. [PMID: 35266465 DOI: 10.1039/d1nr06231j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Bimetallic nanoparticles prove advantageous over their monometallic counterparts due to the tunable, hybrid properties that result from combining different atomic species in a controlled way. The favorable optical and catalytic properties resulting from AgAu nanoparticle formation have been widely attributed to the existence of Ag-Au bonds, the maximization of which assumes the formation of a homogeneous alloy. Despite the importance of atomic scale structure in these systems, synthetic studies are typically not paired with structural characterization at the atomic scale. Herein, a comprehensive synthetic exploration of physical and chemical reduction parameters of resulting nanoparticle products is complemented with thorough X-ray characterization to probe how these parameters affect atomic scale alloy distributions within AgAu nanoparticles. Presented evidence shows Ag is substantially underincorporated into nanoparticle constructs compared with solution Ag : Au ratios regardless of precursor : reductant ratio or volume of reductant added. Both Ag and Au exhibit significant local clustering, with Ag distributed preferentially towards the nanoparticle surface. Most significantly, the results of this investigation suggest that reduction parameters alone can affect the local alloy distributions and homogeneity within bimetallic nanoparticles, even when the ratio of metallic precursors remains constant. Overall, this investigation presents the ability to control alloy distributions using kinetics and provides new considerations for optimizing synthetic methods to produce functional bimetallic nanoparticles.
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Affiliation(s)
- Hannah M Johnson
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
| | - Acacia M Dasher
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
| | - Madison Monahan
- Department of Chemistry, University of Washington, Seattle, WA 98195, USA
| | - Soenke Seifert
- X-ray Sciences Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Liane M Moreau
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
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19
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Wang Y, Satyavolu NSR, Yang H, Lu Y. Kinetic Reconstruction of DNA-Programed Plasmonic Metal Nanostructures with Predictable Shapes and Optical Properties. J Am Chem Soc 2022; 144:4410-4421. [PMID: 35234474 DOI: 10.1021/jacs.1c11333] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
It is desirable to rationally engineer plasmonic metal nanostructures with sets of structural parameters that lead to specific functions. However, it is still challenging to predict the nanostructured outcome of a synthesis reaction by design because not only the exact kinetic path for the structural evolution is very complicated but also the relationships among various functional and structural parameters are often tangled. It is necessary to deconvolute the structure-function relationships and understand the co-evolution of structural and functional parameters as the nanostructures grow. DNA is a programable biomolecular capping ligand that was shown to be capable of precisely controlling the evolution of metal nanostructures. In this study, we systematically analyzed the evolution of two structural parameters and several functional parameters in the growth of Au-Ag nanostructures controlled by two DNA sequences. We deconvoluted the contributions from the two structural parameters in affecting the plasmonic properties in different kinetic and geometric domains. We further designed new nanostructures by exchanging DNA sequences in the growth environment, which also changed their evolution pathways. The resulting structural and functional parameters could be predictively tuned by the timing of the exchange. This study demonstrates the powerful toolbox provided by programable biomolecules in producing novel nanostructures in a predictable manner. It also shows that by understanding the kinetic evolution of the structural parameters and their relationships with the function parameters, it is possible to design the precise combinations of structural and functional parameters in the nanostructured products.
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Affiliation(s)
- Yiming Wang
- Departments of Chemistry, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, United States
| | - Nitya Sai Reddy Satyavolu
- Departments of Chemistry, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, United States
| | - Hong Yang
- Departments of Chemistry, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, United States.,Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, United States
| | - Yi Lu
- Departments of Chemistry, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, United States
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20
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Yun Q, Xu J, Wei T, Ruan Q, Zhu X, Kan C. Synthesis of Pd nanorod arrays on Au nanoframes for excellent ethanol electrooxidation. NANOSCALE 2022; 14:736-743. [PMID: 34939638 DOI: 10.1039/d1nr05987d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Au-Pd hollow nanostructures have attracted a lot of attention because of their excellent ethanol electrooxidation performance. Herein, we report a facile preparation of Au nanoframe@Pd array electrocatalysts in the presence of cetylpyridinium chloride. The reduced Pd atoms were directed to mainly deposit on the surface of the Au nanoframes in the form of rods, leading to the formation of Au nanoframe@Pd arrays with a super-large specific surface area. The red shift and damping of the plasmon peak were ascribed to the deposition of the Pd arrays on the surface of the Au nanoframes and nanobipyramids, which was verified by electrodynamic simulations. Surfactants, temperature and reaction time determine the growth process and thereby the architecture of the obtained Au-Pd hollow nanostructures. Compared with the Au nanoframe@Pd nanostructures and Au nanobipyramid@Pd arrays, the Au nanoframe@Pd arrays exhibit an enhanced electrocatalytic performance towards ethanol electrooxidation due to an abundance of catalytic active sites. The Au NF@Pd arrays display 4.1 times higher specific activity and 13.7 times higher mass activity than the commercial Pd/C electrocatalyst. Moreover, the nanostructure shows improved stability towards the ethanol oxidation reaction. This study enriches the manufacturing technology to increase the active sites of noble metal nanocatalysts and promotes the development of direct ethanol fuel cells.
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Affiliation(s)
- Qinru Yun
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
| | - Juan Xu
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
| | - Tingcha Wei
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
| | - Qifeng Ruan
- Engineering Product Development, Singapore University of Technology and Design, Singapore 487372
| | - Xingzhong Zhu
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
| | - Caixia Kan
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
- Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing 211106, China
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21
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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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22
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Xu J, Yun Q, Zhang H, Guo Y, Ke S, Wang J, Zhu X, Kan C. A novel deposition mechanism of Au on Ag nanostructures involving galvanic replacement and reduction reactions. Chem Commun (Camb) 2021; 57:8332-8335. [PMID: 34323254 DOI: 10.1039/d1cc02674g] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Combining a galvanic replacement reaction with a reduction reaction can provide more possibility in the synthesis of Au-Ag hollow nanostructures. However, the detailed atomic deposition mechanism involving these two reactions is unclear. Herein, we proposed a novel deposition mechanism of the Au atoms on Ag nanostructures involving simultaneous galvanic replacement and reduction reactions. The Au atoms originating from galvanic replacement reaction will deposit at surface energy-related facets of the Ag nanostructures while the others originated from reduction reaction at high curvature sites, with the morphology of the final Ag@Au nanostructures determined by the ratio between the two reactions. This mechanism has been verified by experiments on Ag nanorods using varied volumes of Au precursor. Moreover, it can also be extended to Ag cuboctahedrons, suggesting the generality of this mechanism.
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Affiliation(s)
- Juan Xu
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China.
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23
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Yoo S, Go S, Son J, Kim J, Lee S, Haddadnezhad M, Hilal H, Kim JM, Nam JM, Park S. Au Nanorings with Intertwined Triple Rings. J Am Chem Soc 2021; 143:15113-15119. [PMID: 34369765 DOI: 10.1021/jacs.1c05189] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We designed complex Au nanorings with intertwined triple rings (ANITs) in a single entity to amplify the efficacy of near-field focusing. Such a complex and unprecedented morphology at the nanoscale was realized through on-demand multistepwise reactions. Triangular nanoprisms were first sculpted into circular nanorings, followed by a series of chemical etching and deposition reactions eventually leading to ANITs wherein thin metal bridges hold the structure together without any linker molecules. In the multistepwise reaction, the well-faceted growth pattern of Au, which induces the growth of two distinctive flat facets in a lateral direction, is important to evolve the morphology from single to multiple nanorings. Although our synthesis proceeds through multiple steps in one batch without purification steps, it shows a remarkably high yield (>∼90%) at the final stage. The obtained high degree of homogeneity (in both shape and size) of the resulting ANITs allowed us to systematically investigate the corresponding localized surface plasmon resonance (LSPR) coupling with varying nanoring arrangements and observe their single-particle surface enhanced Raman scattering (SERS). Surprisingly, individual ANITs exhibited an enormously large enhancement factor (∼109), which confirms their superior near-field focusing relative to other reported nanoparticles.
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Affiliation(s)
- Sungjae Yoo
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Sungeun Go
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Jiwoong Son
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea
| | - Jeongwon Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Soohyun Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, South Korea
| | | | - Hajir Hilal
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, South Korea
| | - Jae-Myoung Kim
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea
| | - Jwa-Min Nam
- Department of Chemistry, Seoul National University, Seoul 08826, South Korea
| | - Sungho Park
- Department of Chemistry, Sungkyunkwan University, Suwon 440-746, South Korea
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24
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Gao W, Kan C, Ke S, Yun Q, Zhu X, Zhu X. Au nanobipyramids with Pt decoration enveloped in TiO 2 nanoboxes for photocatalytic reactions. NANOSCALE ADVANCES 2021; 3:4226-4234. [PMID: 36132847 PMCID: PMC9418515 DOI: 10.1039/d1na00092f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/31/2021] [Indexed: 06/16/2023]
Abstract
Noble metal nanocrystals and core-shell nanocomposites have attracted particular interest due to their unique optical properties originating from surface plasmon resonance (SPR) and wide applications related to the SPR effect. In this work, we designed and fabricated a new Au-Pt@TiO2 nanocomposite, in which Au nanobipyramids (AuNBPs) decorated with platinum (Pt) clusters were enveloped in mesoporous TiO2 nanoboxes with nanocavities. AuNBPs provide strong SPR absorption and localized field enhancement restricted to the cavities of TiO2 nanoboxes. The Pt nanoclusters decorated on the surface of AuNBPs can effectively modulate the charge movement and energy transfer in the photocatalytic process. The enhanced electric field provides a local thermal effect for the photocatalytic reaction and promotes the injection process of hot electrons which facilitates carrier separation. The nanoboxes with nanocavities can effectively manage the usage of localized energy and provide space for reaction. Under the cooperative effects, the photocatalytic performance was remarkably improved along with durability and stability. For the AuNBP-Pt@TiO2 nanoboxes, the rhodamine-B degradation efficiency was ∼6.5 times that of AuNBP@TiO2 nanoboxes. The mechanism of the photocatalysis process was proposed based on experimental results and simulations. Benefiting from the excellent structure and properties, the obtained nanostructure is a promising candidate in the fields of pollutant degradation and chemical reaction catalysis.
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Affiliation(s)
- Weijian Gao
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 210016 China
| | - Caixia Kan
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 210016 China
- Key Laboratory of Aerospace Information Materials and Physics, Ministry of Industry and Information Technology Nanjing 210016 China
- Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education Nanjing 210016 China
| | - Shanlin Ke
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 210016 China
| | - Qinru Yun
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 210016 China
| | - Xingzhong Zhu
- College of Science, Nanjing University of Aeronautics and Astronautics Nanjing 210016 China
| | - Xiaoguang Zhu
- Institute of Solid State Physics, Chinese Academy of Sciences Hefei 230031 China
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25
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Ke S, Kan C, Zhu X, Wang C, Wang X, Chen Y, Zhu X, Li Z, Shi D. Synthesis of porous Au–Ag alloy nanorods with tunable plasmonic properties and intrinsic hotspots for surface-enhanced Raman scattering. CrystEngComm 2021. [DOI: 10.1039/d1ce00258a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The tunability of longitudinal plasmonic bands of P-AuAgNRs is realized to cover a wide range of wavelengths. P-AuAgNRs exhibit numerous internal hotspots which favor highly sensitive surface-enhanced Raman scattering detection.
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Affiliation(s)
- Shanlin Ke
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- P. R. China
| | - Caixia Kan
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- P. R. China
- Key Laboratory of Aerospace Information Materials and Physics
| | - Xingzhong Zhu
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- P. R. China
- Key Laboratory of Aerospace Information Materials and Physics
| | - Changshun Wang
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- P. R. China
| | - Xiu Wang
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- P. R. China
| | - Yuan Chen
- Key Laboratory of Radio Frequency and Micro-Nano Electronics of Jiangsu Province
- Nanjing 210023
- P. R. China
| | - Xiaoguang Zhu
- Institute of Solid State Physics
- Chinese Academy of Sciences
- Hefei 230031
- P. R. China
| | - Zhaosheng Li
- National Laboratory of Solid State Microstructures
- Nanjing University
- Nanjing 210093
- P. R. China
| | - Daning Shi
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- P. R. China
- Key Laboratory of Aerospace Information Materials and Physics
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26
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Ivanchenko M, Evangelista AJ, Jing H. Palladium-rich plasmonic nanorattles with enhanced LSPRs via successive galvanic replacement mediated by co-reduction. RSC Adv 2021; 11:40112-40119. [PMID: 35494128 PMCID: PMC9044558 DOI: 10.1039/d1ra06109g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 12/10/2021] [Indexed: 12/17/2022] Open
Abstract
Catalytic transformations under light irradiation have been extensively demonstrated by the excitation of the localized surface plasmon resonances (LSPRs) in noble metal-based nanoparticles. To fully harness the potential of noble metal-based nanocatalysts, it is fundamentally imperative to explore hybrid nano-systems with the most desirable enhanced LSPRs and intrinsic catalytic activities. Pd-containing hollow multimetallic nanostructures transformed from the sacrificial template of Ag via galvanic replacement reaction (GRR) offer such ideal platforms to gain quantitative insights into nanoparticle-catalyzed reactions. In this work, we successfully fabricated Pd-rich plasmonic nanorattles by means of co-reduction mediated GRR using CTAC-stabilized Au@Ag nanocuboids as templates and H2PdCl4 as a Pd precursor in the presence of ascorbic acid (AA) acting as a mild reducing agent. Successive titration of Au@Ag nanocuboids with the Pd precursor in the presence of AA modulates the rate of the galvanic replacement reaction as well as effective diffusion of Pd into the Ag matrix, resulting in increased dimensions and enlarged cavity sizes. Reduction of oxidized Ag+ back to Ag0 by AA, along with the deposition of Pd to form homogeneously mixed bimetallic layers not only prevents LSPRs peak from damping with increasing Pd content but also ensures the enhanced catalytic activities. Through precise control of added H2PdCl4 titrant, an unconventional steep increase in extinction intensity accompanied by tunable plasmon resonances shifted towards the NIR spectral region was experimentally observed due to the increasing physical cross-sections and plasmon hybridization in hollow nanorattles. Four colloids of Pd-rich nanorattles obtained by addition of different amounts of the H2PdCl4 titrant were used as catalysts for reduction of 4-nitrothiophenol in the presence of NaBH4 monitored by SERS. Palladium-rich plasmonic nanorattles with enhanced surface plasmon resonances synthesized through successive galvanic replacement mediated by co-reduction.![]()
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Affiliation(s)
- Mariia Ivanchenko
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia 22030, USA
| | - Andrew J. Evangelista
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia 22030, USA
| | - Hao Jing
- Department of Chemistry and Biochemistry, George Mason University, Fairfax, Virginia 22030, USA
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27
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Xu J, Yun Q, Wang C, Li M, Cheng S, Ruan Q, Zhu X, Kan C. Gold nanobipyramid-embedded silver-platinum hollow nanostructures for monitoring stepwise reduction and oxidation reactions. NANOSCALE 2020; 12:23663-23672. [PMID: 33216083 DOI: 10.1039/d0nr03315d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Metal hollow nanostructures based on gold nanobipyramids (Au NBPs) are of great interest for the combination of tunable plasmonic resonances and excellent physicochemical properties. Based on the core-shell Au NBP@Ag nanorods with desired sizes, herein we reported the synthesis and growth mechanism of Au NBP-embedded AgPt hollow nanostructures with tunable thickness and size. The Au NBP@AgPt nanoframes were obtained at lower temperature, in which cetyltrimethylammonium bromine (CTAB) was applied as a capping agent to guide the deposition of Pt atoms on the edges and corners of Au NBPs@Ag nanorods. With the increase of reaction temperature, the Au NBP@AgPt nanoframes convert into nanocages due to the atomic migration to the surfaces. The surface plasmon resonance of the Au NBP@AgPt hollow nanostructure shifts from red to blue, which is ascribed to the changes in coverage area and location site of the AgPt alloy. When CTAB was replaced by cetyltrimethylammonium chloride (CTAC), Au NBP@AgPt nanocages dominate the product. The surface roughness and thickness of the nanocages can be controlled by the temperature and the amount of Pt precursor. Moreover, Au NBP@AgPt hollow nanostructures show excellent surface-enhanced Raman scattering and exhibit remarkable stability in harsh environments. Taking into account the advantages of the plasmonic property (Au NBPs), catalytic activity (Pt) and plasmon-enhanced signal (Ag), the Au NBP@AgPt hollow nanostructures are a promising candidate for technological applications in catalytic reactions.
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Affiliation(s)
- Juan Xu
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China.
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28
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Hao H, Yang Y, Zou C, Chen W, Wen H, Wang W, Yang Y. Effects of Strain and Kinetics on the H 2O 2-Assisted Reconstruction of Ag-Au-Ag Nanorods. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9770-9779. [PMID: 32787127 PMCID: PMC7450662 DOI: 10.1021/acs.langmuir.0c01230] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 07/29/2020] [Indexed: 05/24/2023]
Abstract
Morphology of Ag nanocrystals (NCs) is essential to the NC application in catalysis, optics, and as antibacterial agents. Therefore, it is important to develop synthetic methods and understand the evaluation of NC morphology in different chemical environments. In this study, we report interesting findings of the morphological change of fivefold-twinned Ag-Au-Ag nanorods (NRs) under the effect of H2O2 both as an oxidant (etchant) and a reductant. At low H2O2 concentration, the reconstruction of Ag-Au-Ag NRs was dominated by the growth along the longitudinal direction of NRs. With the increase of H2O2 concentration, the reconstruction also occurs in the transverse direction, and a clear change in particle morphology was observed. We further systematically studied the mechanism of the reaction. The results showed that the transition of the morphology was a two-step process: (1) the etching of Ag on the seeds and (2) the reduction of Ag2O. In the second step, the reaction kinetics was highly affected by H2O2 concentration. At low H2O2 concentration, the growth mainly occurs along ⟨110⟩. However, at high H2O2 concentration, the reduction of Ag was not facet-selective. Using the developed method, we can prepare various bimetallic NCs (high aspect ratio NRs with abundant pinholes, nanoplates, and other NCs). The effect of the reconstruction process on the surface-enhanced Raman scattering (SERS) performance of NCs was investigated.
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Affiliation(s)
- Hui Hao
- Nanomaterials
and Chemistry Key Laboratory, Wenzhou University, Wenzhou 325035, China
| | - Yinliang Yang
- College
of Pharmacy, Liaocheng University, Liaocheng 252000, Shandong, China
| | - Chao Zou
- Nanomaterials
and Chemistry Key Laboratory, Wenzhou University, Wenzhou 325035, China
| | - Wei Chen
- Nanomaterials
and Chemistry Key Laboratory, Wenzhou University, Wenzhou 325035, China
| | - Haihong Wen
- College
of Life and Environmental Science, Wenzhou
University, Wenzhou 325035, China
| | - Wei Wang
- Department
of Chemistry & Center for Pharmacy, University of Bergen, 5020 Bergen, Norway
| | - Yun Yang
- Nanomaterials
and Chemistry Key Laboratory, Wenzhou University, Wenzhou 325035, China
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29
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Zhu X, Xu J, Yun Q, Wang C, Ruan Q, Kan C. Realization of red plasmon shifts by the selective etching of Ag nanorods. CrystEngComm 2020. [DOI: 10.1039/d0ce01362e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The red plasmon shifts is realized through selective deposition of Au atoms and etching of Ag atoms on the Ag nanorods.
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Affiliation(s)
- Xingzhong Zhu
- 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
| | - Qinru Yun
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- China
| | - Changshun Wang
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- China
| | - Qifeng Ruan
- Engineering Product Development
- Singapore University of Technology and Design
- Singapore 487372
- Singapore
| | - Caixia Kan
- College of Science
- Nanjing University of Aeronautics and Astronautics
- Nanjing 210016
- China
- Key Laboratory for Intelligent Nano Materials and Devices of the Ministry of Education
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