1
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Tang R, Hughes RA, Tuff WJ, Corcoran A, Neretina S. Rapid formation of gold core-satellite nanostructures using Turkevich-synthesized satellites and dithiol linkers: the do's and don'ts for successful assembly. NANOSCALE ADVANCES 2024; 6:3632-3643. [PMID: 38989523 PMCID: PMC11232561 DOI: 10.1039/d4na00390j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Accepted: 05/30/2024] [Indexed: 07/12/2024]
Abstract
Turkevich syntheses represent a foundational approach for forming colloids of monodisperse gold nanoparticles where the use of these structures as building blocks when forming multicomponent nanoassemblies is pervasive. The core-satellite motif, which is characterized by a central core structure onto which satellite structures are tethered, distinguishes itself in that it can realize numerous plasmonic nanogaps with nanometer scale widths. Established procedures for assembling these multicomponent structures are, to a large extent, empirically driven, time-consuming, difficult to reproduce, and in need of a strong mechanistic underpinning relating to the close-range electrostatic interactions needed to secure satellite structures onto core materials. Described herein is a rapid, repeatable procedure for assembling core-satellite structures using Turkevich-grown satellites and dithiol linkers. With this successful procedure acting as a baseline for benchmarking modified procedures, a rather complex parameter space is understood in terms of timeline requirements for various processing steps and an analysis of the factors that prove consequential to assembly. It is shown that seemingly innocuous procedures realize sparsely populated cores whereas cores initially obstructed with commonly used capping agents lead to few disruptions to satellite attachment. Once these factors are placed under control, then it is the ionic strength imposed by the reaction biproducts of the Turkevich synthesis that is the critical factor in assembly because they decide the spatial extent of the electrical double layer surrounding each colloidal nanoparticle. With this understanding, it is possible to control the ionic strength through the addition or subtraction of various ionic species and assert control over the assembly process. The work, hence, advances the rules for a robust core-satellite assembly process and, in a broader sense, contributes to the knowhow required for the precise, programmable, and controllable assembly of multicomponent systems.
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Affiliation(s)
- Runze Tang
- College of Engineering, University of Notre Dame Notre Dame Indiana 46556 USA
| | - Robert A Hughes
- College of Engineering, University of Notre Dame Notre Dame Indiana 46556 USA
| | - Walker J Tuff
- College of Engineering, University of Notre Dame Notre Dame Indiana 46556 USA
| | - Ana Corcoran
- College of Engineering, University of Notre Dame Notre Dame Indiana 46556 USA
| | - Svetlana Neretina
- College of Engineering, University of Notre Dame Notre Dame Indiana 46556 USA
- Department of Chemistry & Biochemistry, University of Notre Dame Notre Dame Indiana 46556 USA
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2
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Trinh HD, Kim S, Yun S, Huynh LTM, Yoon S. Combinatorial Approach to Find Nanoparticle Assemblies with Maximum Surface-Enhanced Raman Scattering. ACS APPLIED MATERIALS & INTERFACES 2024; 16:1805-1814. [PMID: 38001021 DOI: 10.1021/acsami.3c14487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2023]
Abstract
Plasmonic nanoparticles exhibit unique properties that distinguish them from other nanomaterials, including vibrant visible colors, the generation of local electric fields, the production of hot charge carriers, and localized heat emission. These properties are particularly enhanced in the narrow nanogaps formed between nanostructures. Therefore, creating nanogaps in a controlled fashion is the key to achieving a fundamental understanding of plasmonic phenomena originating from the nanogaps and developing advanced nanomaterials with enhanced performance for diverse applications. One of the most effective approaches to creating nanogaps is to assemble individual nanoparticles into a clustered structure. In this study, we present a fast, facile, and highly efficient method for preparing core@satellite (CS) nanoassembly structures using gold nanoparticles of various shapes and sizes, including nanospheres, nanocubes (AuNCs), nanorods, and nanotriangular prisms. The sequential assembly of these building blocks on glass substrates allows us to obtain CS nanostructures with a 100% yield within 4 h. Using 9 different building blocks, we successfully produce 16 distinct CS nanoassemblies and systematically investigate the combinations to search for the highest Raman enhancement. We find that the surface-enhanced Raman scattering (SERS) intensity of AuNC@AuNC CS nanoassemblies is 2 orders of magnitude larger than that of other CS nanoassemblies. Theoretical analyses reveal that the intensity and distribution of the electric field induced in the nanogaps by plasmon excitation, as well as the number of molecules in the interfacial region, collectively contribute to the unprecedentedly large SERS enhancement observed for AuNC@AuNC. This study not only presents a novel assembly method that can be extended to produce many other nanoassemblies but also identifies a highly promising SERS material for sensing and diagnostics through a systematic search process.
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Affiliation(s)
- Hoa Duc Trinh
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
| | - Seokheon Kim
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
| | - Seokhyun Yun
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
| | - Ly Thi Minh Huynh
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
| | - Sangwoon Yoon
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea
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3
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Yun S, Yoon S. Mode-Selective Plasmon Coupling between Au Nanorods and Au Nanospheres. J Phys Chem Lett 2023; 14:10225-10232. [PMID: 37931252 DOI: 10.1021/acs.jpclett.3c02555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Plasmons play a central role in the properties of gold nanoparticles (AuNPs). Plasmons in a AuNP are influenced by neighboring ones, resulting in hybridized bonding dipole modes and red-shifted resonance peaks in the extinction spectra. Previous studies have mainly focused on plasmon coupling among spherical AuNPs (AuNSs). Here, we explore plasmonic interactions between AuNSs and anisotropic gold nanorods (AuNRs), which have longitudinal (LO) and transverse (TR) plasmon modes. We successfully assemble AuNSs around AuNRs ("AuNR@AuNS"), observing shifts in both the LO and TR modes in the extinction spectra due to directional coupling. Selectively binding AuNSs to the ends of AuNRs ("AuNR═AuNS") leads to predominant plasmon coupling along the LO direction. Our simulation studies reveal that exclusive LO or TR coupling occurs only when AuNSs attach to the center of either the end or the side of AuNRs. This study provides a valuable guideline for selectively exciting plasmons in desired nanogaps when multiple nanogaps are present.
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Affiliation(s)
- Seokhyun Yun
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea
| | - Sangwoon Yoon
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Seoul 06974, Korea
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4
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Razavi S, Zhao Y. Plasmon Hybridizations in Compound Nanorod-Nanohole Arrays. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2135. [PMID: 37513146 PMCID: PMC10383225 DOI: 10.3390/nano13142135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/12/2023] [Accepted: 07/20/2023] [Indexed: 07/30/2023]
Abstract
This study shows that a hybridized plasmonic mode, represented by an additional transmission peak, in a compound structure consisting of a nanorod embedded in a nanohole can be effectively described as a quasi-dipole oscillator. When two nanorods are introduced into a nanohole, these two quasi-dipoles can couple and hybridize, giving rise to two additional transmission peaks in the enhanced optical transmission spectrum. The relative intensities of these peaks can be controlled by adjusting the incident polarization, while their separations can be tuned by modifying the length of the nanorods. The concept of quasi-dipoles in compound nanohole structures can be further extended to predict the coupling behavior of even more complex compound configurations, such as multiple nanorods within nanoholes, resulting in the generation of multiple hybridization states. Consequently, the shape and response of the transmission peaks can be precisely engineered. This strategy could be used to design nanohole-based metasurfaces for applications such as ultra-thin optical filters, waveplates, polarizers, etc.
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Affiliation(s)
- Shahab Razavi
- Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA
| | - Yiping Zhao
- Department of Physics and Astronomy, University of Georgia, Athens, GA 30602, USA
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5
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Wang WB, Li JJ, Weng GJ, Zhu J, Guo YB, Zhao JW. An anisotropic nanobox based core-shell-satellite nanoassembly of multiple SERS enhancement with heterogeneous interface for stroke marker determination. J Colloid Interface Sci 2023; 647:81-92. [PMID: 37245272 DOI: 10.1016/j.jcis.2023.05.137] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 05/05/2023] [Accepted: 05/20/2023] [Indexed: 05/30/2023]
Abstract
Herein, A novel gold-silver alloy nanobox (AuAgNB)@SiO2-gold nanosphere (AuNP) nanoassembly based on core-shell-satellite structure is fabricated and applied to the surface-enhanced Raman scattering (SERS) detection of S100 calcium-binding protein B protein (S100B). It contains an anisotropic hollow porous AuAgNB core with rough surface, an ultrathin silica interlayer labeled with reporter molecules, and AuNP satellites. The nanoassemblies were systematically optimized by tuning the reporter molecules concentration, silica layer thickness, AuAgNB size, and the size and number of AuNP satellite size. Remarkably, AuNP satellites are adjacent to AuAgNB@SiO2, developing AuAg-SiO2-Au heterogeneous interface. With the strong plasmon coupling between AuAgNB and AuNP satellites, chemical enhancement from heterogeneous interface, and the tip "hot spots" of AuAgNB, the SERS activity of the nanoassemblies was multiply enhanced. Additionally, the stability of nanostructure and Raman signal was significantly improved by the silica interlayer and AuNP satellites. Eventually, the nanoassemblies were applied for S100B detection. It demonstrated satisfactory sensitivity and reproducibility with a wide detection range of 10 fg/mL-10 ng/mL and a limit of detection (LOD) of 1.7 fg/mL. This work based on the AuAgNB@SiO2-AuNP nanoassemblies with multiple SERS enhancements and favorable stability demonstrates the promising application in stroke diagnosis.
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Affiliation(s)
- Wei-Bin Wang
- 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.
| | - 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 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
| | - Yu-Bo Guo
- 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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6
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Hwang EY, Lee JH, Kang MJ, Lim DW. Stimuli-responsive plasmonic core-satellite hybrid nanostructures with tunable nanogaps. J Mater Chem B 2023; 11:1692-1704. [PMID: 36723160 DOI: 10.1039/d2tb02546a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Incorporating stimuli-responsive block copolymers to hierarchical metallic nanoparticles (MNPs) is of particular interest due to their tunable plasmonic properties responding to environmental stimuli. We herein report thermo-responsive plasmonic core-satellite hybrid nanostructures with tunable nanogaps as surface-enhanced Raman scattering (SERS) nanotags. Two different diblock copolymers with opposite charges, poly(acrylic acid-b-N-isopropylacrylamide) (p(AAc-b-NIPAM)) and poly(N,N-dimethylaminoethyl methacrylate-b-N-isopropylacrylamide) (p(DMAEMA-b-NIPAM)), were synthesized. The negatively charged p(AAc-b-NIPAM)s were bound to gold nanospheres (GNSs), while the positively charged p(DMAEMA-b-NIPAM)s were conjugated to gold nanorods (GNRs) via gold-sulfur bonds. When p(AAc-b-NIPAM)-GNSs and p(DMAEMA-b-NIPAM)-GNRs were electrostatically complexed, plasmonic hybrid nanostructures consisting of both GNS satellites and a GNR core were formed. Dynamic tuning of electromagnetic coupling of their nanogaps was achieved via a temperature-triggered conformational change of p(NIPAM) blocks. Furthermore, a sandwich-type immunoassay for the detection of immunoglobulin G was performed to demonstrate these core-satellites as potential SERS nanotags. Our results showed that these plasmonic core-satellites with stimuli-responsiveness are promising for SERS-based biosensing applications.
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Affiliation(s)
- Eun Young Hwang
- Department of Bionano Engineering and Department of Bionanotechnology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, Republic of Korea.
| | - Jae Hee Lee
- Department of Bionano Engineering and Department of Bionanotechnology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, Republic of Korea.
| | - Min Jeong Kang
- Department of Bionano Engineering and Department of Bionanotechnology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, Republic of Korea.
| | - Dong Woo Lim
- Department of Bionano Engineering and Department of Bionanotechnology, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan, Republic of Korea.
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7
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Zhou Y, Zhu J, Xi J, Li K, Huang W. Quantitative Insights into a Plasmonic Ruler Equation from the Perspective of Enhanced Near Field. J Phys Chem A 2023; 127:390-399. [PMID: 36571254 DOI: 10.1021/acs.jpca.2c07702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The plasmonic shift of resonance wavelength induced by near-field coupling enables one to measure nanoscale distances optically. Empirically, the well-known ruler equation correlating plasmon shift with interparticle spacing was proposed. Though it has been widely used in analyzing simulation and experimental outcomes, little is known about the underlying physical mechanism of the characteristic exponential form of the plasmon ruler equation and the universal decay constant therein. In this work, we attempt to decrypt these from the perspective of plasmon near-field enhancement. Based on an analytical quasi-normal mode formula for plasmon shifts, we proved that the exponential decaying electric field is the critical reason that results in the exponential form of the plasmon ruler equation and quantitatively, we found that the universal decay constant in the plasmon ruler equation actually reflects the range of the enhanced near field. This work hopefully helps to deepen the understanding of the mechanism of light-matter interaction in corresponding plasmonic processes.
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Affiliation(s)
- Yong Zhou
- Anhui Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu, Anhui241000, P. R. China
| | - Jiahui Zhu
- Anhui Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu, Anhui241000, P. R. China
| | - Jin Xi
- Anhui Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu, Anhui241000, P. R. China
| | - Kuanguo Li
- Anhui Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu, Anhui241000, P. R. China
| | - Wanxia Huang
- Anhui Key Laboratory of Optoelectric Materials Science and Technology, Department of Physics, Anhui Normal University, Wuhu, Anhui241000, P. R. China
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8
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Core-satellite nanostructures and their biomedical applications. Mikrochim Acta 2022; 189:470. [DOI: 10.1007/s00604-022-05559-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Accepted: 10/26/2022] [Indexed: 11/27/2022]
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9
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Trinh HD, Kim S, Park J, Yoon S. Core-satellite-satellite hierarchical nanostructures: assembly, plasmon coupling, and gap-selective surface-enhanced Raman scattering. NANOSCALE 2022; 14:17003-17012. [PMID: 36354377 DOI: 10.1039/d2nr04621k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The plasmonic properties of gold nanoparticles (AuNPs), such as color tunability, electric field generation, hot carrier generation, and localized heating, are significantly enhanced in the nanogaps between AuNPs. Therefore, the creation and control of nanogaps are key to developing advanced plasmonic nanomaterials. Most AuNP nanoassemblies, including dimers, trimers, and core-satellites, have a single type of nanogap within the assembly. In this study, we construct core-satellite-satellite (CSS) hierarchical, fractal-like nanostructures featuring two types of nanogaps, namely first generation nanogaps (Gap1) between the core and first satellite (Sat1) AuNPs and second generation nanogaps (Gap2) between Sat1 and second satellite (Sat2) AuNPs. The sequential and alternating immersion of glass slides in different-sized AuNPs and linkers forms CSS with perfect yield. The UV-vis spectroscopy, combined with charge density distribution calculations, reveals the nature of the plasmon coupling between the AuNPs that constitute CSS nanoassemblies. The plasmon coupling can be tuned by independently varying Gap1 and Gap2. Furthermore, we explore the electric field amplification in Gap1 and Gap2 by comparing the surface-enhanced Raman scattering signal intensity selectively from each nanogap. This new type of nanostructure provides a great flexibility to control and enhance the plasmonic properties of noble metal nanoparticles.
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Affiliation(s)
- Hoa Duc Trinh
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
| | - Seokheon Kim
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
| | - Joohwan Park
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
| | - Sangwoon Yoon
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
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10
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Zhang X, Ge Y, Liu M, Pei Y, He P, Song W, Zhang S. DNA-Au Janus Nanoparticles for In Situ SERS Detection and Targeted Chemo-photodynamic Synergistic Therapy. Anal Chem 2022; 94:7823-7832. [PMID: 35603574 DOI: 10.1021/acs.analchem.1c05649] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Cancer theranostics is of great significance in the personalized therapy. In this work, stable Janus nanoparticles (JNPs) containing PEG and two kinds of DNAs were prepared by means of "click chemistry". In response to ATP or acid condition, the prepared JNPs could form Au NP dimers, which facilitate in situ SERS detection and SERS imaging analysis of cancer cells due to the formation of "hot spots" in the nanogap between the Au NP dimers. A detection limit of 2.3 × 10-9 M was obtained for ATP. As for a pH sensor, the SERS signals increased with the decrease of pH value from 8.0 to 4.0. In situ monitoring of ATP or acid condition in cancer cells by SERS can improve the accuracy and sensitivity of diagnosis. Moreover, drugs and photosensitizers loaded on the other side of JNPs led to the chemotherapy/photodynamic therapy synergistic antitumor effect, which was verified by in vitro and in vivo experiments. Given the excellent performance in SERS detection and cancer therapy, the developed JNPs hold considerable potential in cancer theranostics.
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Affiliation(s)
- Xiaoru Zhang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, and College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Yonghao Ge
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Minghui Liu
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Yujiao Pei
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Peng He
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Weiling Song
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P.R. China
| | - Shusheng Zhang
- Shandong Province Key Laboratory of Detection Technology for Tumor Makers, Collaborative Innovation Center of Tumor Marker Detection Technology, Equipment and Diagnosis-Therapy Integration in Universities of Shandong; and College of Chemistry and Chemical Engineering, Linyi University, Linyi 276000, P.R. China
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11
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Zhang C, Li D, Zhang G, Wang X, Mao L, Gan Q, Ding T, Xu H. Switching plasmonic nanogaps between classical and quantum regimes with supramolecular interactions. SCIENCE ADVANCES 2022; 8:eabj9752. [PMID: 35119919 PMCID: PMC8816333 DOI: 10.1126/sciadv.abj9752] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In the realm of extreme nanophotonics, nanogap plasmons support reliable field enhancements up to 1000, which provide unique opportunities to access a single molecule for strong coupling and a single atom for quantum catalysis. The quantum plasmonics are intriguing but difficult to modulate largely because of the lack of proper spacers that can reversibly actuate the sub-1-nm gaps. Here, we demonstrate that supramolecular systems made of oligoamide sequences can reversibly switch the gap plasmons of Au nanoparticles on mirror between classical and quantum tunneling regimes via supramolecular interactions. The results reveal detailed plasmon shift near the quantum tunneling limit, which fits well with both classical- and quantum-corrected models. In the quantum tunneling regime, we demonstrate that plasmonic hot electron tunneling can further blue shift the quantum plasmons because of the increased conductance in the nanogaps, making it a promising prototype of optical tunable quantum plasmonic devices.
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Affiliation(s)
- Chi Zhang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Dongyao Li
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Guangdi Zhang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Xujie Wang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Li Mao
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
| | - Quan Gan
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
- Corresponding author. (T.D.); (Q.G.)
| | - Tao Ding
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
- Corresponding author. (T.D.); (Q.G.)
| | - Hongxing Xu
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, China
- School of Microelectronics, Wuhan University, Wuhan 430072, China
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12
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La JA, Lee S, Hong AR, Byun JY, Kang J, Han IK, Cho Y, Kang G, Jang HS, Ko H. A Super-Boosted Hybrid Plasmonic Upconversion Process for Photodetection at 1550 nm Wavelength. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2106225. [PMID: 34796554 DOI: 10.1002/adma.202106225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/11/2021] [Indexed: 06/13/2023]
Abstract
A super-boosted hybrid plasmonic upconversion (UC) architecture comprising a hierarchical plasmonic upconversion (HPU) film and a polymeric microlens array (MLA) film is proposed for efficient photodetection at a wavelength of 1550 nm. Plasmonic metasurfaces and Au core-satellite nanoassembly (CSNA) films can strongly induce a more effective plasmonic effect by providing numerous hot spots in an intense local electromagnetic field up to wavelengths exceeding 1550 nm. Hence, significant UC emission enhancement is realized via the amplified plasmonic coupling of an HPU film comprising an Au CSNA and UC nanoparticles. Furthermore, an MLA polymer film is synergistically coupled with the HPU film, thereby focusing the incident near-infrared light in the micrometer region, including the plasmonic nanostructure area. Consequently, the plasmonic effect super-boosted by microfocusing the incident light, significantly lowers the detectable power limit of a device, resulting in superior sensitivity and responsivity at weak excitation powers. Finally, a triple-cation perovskite-based photodetector coupled with the hybrid plasmonic UC film exhibits the excellent values of responsivity and detectivity of 9.80 A W-1 and 8.22 × 1012 Jones at a weak power density of ≈0.03 mW cm-2 , respectively, demonstrating that the device performance is enhanced by more than 104 magnitudes over a reference sample.
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Affiliation(s)
- Ju A La
- Nanophotonics Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
| | - Seongyu Lee
- Nanophotonics Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
| | - A-Ra Hong
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
| | - Ji Young Byun
- Extreme Materials Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
| | - JoonHyun Kang
- Nanophotonics Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
| | - Il Ki Han
- Nanophotonics Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
| | - Younghak Cho
- Department of Mechanical System Design Engineering, Seoul National University of Science & Technology, 232 Gongneung-ro, Nowon-gu, Seoul, 01811, South Korea
| | - Gumin Kang
- Nanophotonics Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
| | - Ho Seong Jang
- Materials Architecturing Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
| | - Hyungduk Ko
- Nanophotonics Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul, 02792, South Korea
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13
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Wu S, Lei L, Xia Y, Oliver S, Chen X, Boyer C, Nie Z, Shi S. PNIPAM-immobilized gold-nanoparticles with colorimetric temperature-sensing and reusable temperature-switchable catalysis properties. Polym Chem 2021. [DOI: 10.1039/d1py01180d] [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
The temperature-responsive core–shell hybrid nanoparticles PNIPAMs-AuNP have dual-functional applications as colorimetric temperature-sensors and reusable temperature-switchable catalysts.
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Affiliation(s)
- Si Wu
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Lei Lei
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Yuzheng Xia
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Susan Oliver
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Xiaonong Chen
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design, School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia
| | - Zhiyong Nie
- Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing, 100850, China
| | - Shuxian Shi
- College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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14
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Belhout SA, Baptista FR, Devereux SJ, Parker AW, Ward AD, Quinn SJ. Preparation of polymer gold nanoparticle composites with tunable plasmon coupling and their application as SERS substrates. NANOSCALE 2019; 11:19884-19894. [PMID: 31599311 DOI: 10.1039/c9nr05014k] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The controlled surface functionalisation of polystyrene beads (200 nm) with a lipoic acid derivative is used to assemble composites with between 4 to 20% loadings of citrate stabilised gold nanoparticles (13 nm-30 nm), which exhibit variable optical properties arising from interactions of the nanoparticle surface plasmon resonance (SPR). The decrease in average interparticle distance at higher loadings results in a red-shift in the SPR wavelength, which is well described by a universal ruler equation. The composite particles are shown to act as good SERS substrates for the standard analyte 4-mercaptophenol. The direct assessment of the SERS activity for individual composite particles solution is achieved by Raman optical tweezer measurements on 5.3 μm composite particles. These measurements show an increase in performance with increasing AuNP size. Importantly, the SERS activity of the individual particles compares well with the bulk measurements of samples deposited on a surface, indicating that the SERS activity arises primarily from the composite and not due to composite-composite interactions. In both studies the optimum SERS response is obtained with 30 nm AuNPs.
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Affiliation(s)
- Samir A Belhout
- School of Chemistry, University College Dublin, Dublin 4, Republic of Ireland
| | | | - Stephen J Devereux
- School of Chemistry, University College Dublin, Dublin 4, Republic of Ireland
| | - Anthony W Parker
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire, OX11 0FA, UK.
| | - Andrew D Ward
- Central Laser Facility, Research Complex at Harwell, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire, OX11 0FA, UK.
| | - Susan J Quinn
- School of Chemistry, University College Dublin, Dublin 4, Republic of Ireland
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15
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Huynh LTM, Lee S, Yoon S. Formation, Stability, and Replacement of Thiol Self‐Assembled Monolayers as a Practical Guide to Prepare Nanogaps in Nanoparticle‐on‐Mirror Systems. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11830] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
| | - Suhyun Lee
- Department of ChemistryChung‐Ang University Seoul 06974 South Korea
| | - Sangwoon Yoon
- Department of ChemistryChung‐Ang University Seoul 06974 South Korea
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16
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De Silva Indrasekara AS, Norton SJ, Geitner NK, Crawford BM, Wiesner MR, Vo-Dinh T. Tailoring the Core-Satellite Nanoassembly Architectures by Tuning Internanoparticle Electrostatic Interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14617-14623. [PMID: 30407828 DOI: 10.1021/acs.langmuir.8b02792] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The use of plasmonic nanoplatforms has received increasing interest in a wide variety of fields ranging from theranostics to environmental sensing to plant biology. In particular, the development of plasmonic nanoparticles into ordered nanoclusters has been of special interest due to the new chemical functionalities and optical responses that they can introduce. However, achieving predetermined nanocluster architectures from bottom-up approaches in the colloidal solution state still remains a great challenge. Herein, we report a one-pot assembly approach that provides flexibility in precise control of core-satellite nanocluster architectures in the colloidal solution state. We found that the pH of the assembly medium plays a vital role in the hierarchy of the nanoclusters. The architecture along with the size of the satellite gold nanoparticles determines the optical responses of nanoclusters. Using electron microscopy and optical spectroscopy, we introduce a set of design rules for the synthesis of distinct architectures of silica-core gold satellites nanoclusters in the colloidal solution state. Our findings provide insight into advancing the colloidal solution state nanoclusters formation with predictable architectures and optical properties.
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17
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Han F, Soeriyadi AH, Gooding JJ. Reversible Thermoresponsive Plasmonic Core‐Satellite Nanostructures That Exhibit Both Expansion and Contraction (UCST and LCST). Macromol Rapid Commun 2018; 39:e1800451. [DOI: 10.1002/marc.201800451] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 08/07/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Fei Han
- School of Chemistry The University of New South Wales Sydney NSW 2052 Australia
| | - Alexander H. Soeriyadi
- School of Chemistry The University of New South Wales Sydney NSW 2052 Australia
- Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australia
- ARC Center of Excellence in Convergent Bio‐Nano Science and Technology The University of New South Wales Sydney NSW 2052 Australia
| | - J. Justin Gooding
- School of Chemistry The University of New South Wales Sydney NSW 2052 Australia
- Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australia
- ARC Center of Excellence in Convergent Bio‐Nano Science and Technology The University of New South Wales Sydney NSW 2052 Australia
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18
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Rossner C, Tang Q, Müller M, Kothleitner G. Phase separation in mixed polymer brushes on nanoparticle surfaces enables the generation of anisotropic nanoarchitectures. SOFT MATTER 2018; 14:4551-4557. [PMID: 29767175 DOI: 10.1039/c8sm00545a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The preparation of nanoparticles and their targeted connection with other functional units is one key challenge in developing nanoscale devices. Herein, we report an experimental strategy toward the development of anisotropic nanoparticle architectures. Our approach is based on phase separation of binary mixed polymer brushes on gold nanoparticle surfaces leading to Janus-type structures, as revealed by scanning transmission electron microscopy and electron energy-loss spectroscopy and, additionally, corroborated by computer simulation. We show that such structures can be used for the site-selective functionalization with additional nanosized entities.
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Affiliation(s)
- Christian Rossner
- Institut für Elektronenmikroskopie und Nanoanalytik, Technische Universität Graz, Steyrergasse 17, A-8010 Graz, Austria.
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19
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Zhang Z, Bando K, Taguchi A, Mochizuki K, Sato K, Yasuda H, Fujita K, Kawata S. Au-Protected Ag Core/Satellite Nanoassemblies for Excellent Extra-/Intracellular Surface-Enhanced Raman Scattering Activity. ACS APPLIED MATERIALS & INTERFACES 2017; 9:44027-44037. [PMID: 29171749 DOI: 10.1021/acsami.7b14976] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Silver nanoparticles (AgNPs) and their assembled nanostructures such as core/satellite nanoassemblies are quite attractive in plasmonic-based applications. However, one biggest drawback of the AgNPs is the poor chemical stability which also greatly limits their applications. We report fine Au coating on synthesized quasi-spherical silver nanoparticles (AgNSs) with few atomic layers to several nanometers by stoichiometric method. The fine Au coating layer was confirmed by energy-dispersive X-ray spectroscopy elemental mapping and aberration-corrected high-angle annular dark-field scanning transmission electron microscopy. The optimized minimal thickness of Au coating layer on different sized AgNSs (22 nm Ag@0.9 nm Au, 44 nm Ag@1.8 nm Au, 75 nm Ag@2.9 nm Au, and 103 nm Ag@0.9 nm Au) was determined by extreme chemical stability tests using H2O2, NaSH, and H2S gas. The thin Au coating layer on AgNSs did not affect their plasmonic-based applications. The core/satellite assemblies based on Ag@Au NPs showed the comparable SERS intensity and uniformity three times higher than that of noncoated Ag core/satellites. The Ag@Au core/satellites also showed high stability in intracellular SERS imaging for at least two days, while the SERS of the noncoated Ag core/satellites decayed significantly. These spherical Ag@Au NPs can be widely used and have great advantages in plasmon-based applications, intracellular SERS probes, and other biological and analytical studies.
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Affiliation(s)
- Zhiqiang Zhang
- Department of Applied Physics, Osaka University , Suita, Osaka 565-0871, Japan
- CAS Key Lab of Bio-Medical Diagnostics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences , 215163 Suzhou, China
| | - Kazuki Bando
- Department of Applied Physics, Osaka University , Suita, Osaka 565-0871, Japan
| | - Atsushi Taguchi
- Department of Applied Physics, Osaka University , Suita, Osaka 565-0871, Japan
| | - Kentaro Mochizuki
- Department of Applied Physics, Osaka University , Suita, Osaka 565-0871, Japan
| | - Kazuhisa Sato
- Research Center for Ultra-High Voltage Electron Microscopy, Osaka University , Ibaraki, Osaka 567-0047, Japan
| | - Hidehiro Yasuda
- Research Center for Ultra-High Voltage Electron Microscopy, Osaka University , Ibaraki, Osaka 567-0047, Japan
| | - Katsumasa Fujita
- Department of Applied Physics, Osaka University , Suita, Osaka 565-0871, Japan
| | - Satoshi Kawata
- Department of Applied Physics, Osaka University , Suita, Osaka 565-0871, Japan
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20
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Wu LA, Li WE, Lin DZ, Chen YF. Three-Dimensional SERS Substrates Formed with Plasmonic Core-Satellite Nanostructures. Sci Rep 2017; 7:13066. [PMID: 29026173 PMCID: PMC5638830 DOI: 10.1038/s41598-017-13577-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 09/25/2017] [Indexed: 11/24/2022] Open
Abstract
We demonstrate three-dimensional surface-enhanced Raman spectroscopy (SERS) substrates formed by accumulating plasmonic nanostructures that are synthesized using a DNA-assisted assembly method. We densely immobilize Au nanoparticles (AuNPs) on polymer beads to form core-satellite nanostructures for detecting molecules by SERS. The experimental parameters affecting the AuNP immobilization, including salt concentration and the number ratio of the AuNPs to the polymer beads, are tested to achieve a high density of the immobilized AuNPs. To create electromagnetic hot spots for sensitive SERS sensing, we add a Ag shell to the AuNPs to reduce the interparticle distance further, and we carefully adjust the thickness of the shell to optimize the SERS effects. In addition, to obtain sensitive and reproducible SERS results, instead of using the core-satellite nanostructures dispersed in solution directly, we prepare SERS substrates consisting of closely packed nanostructures by drying nanostructure-containing droplets on hydrophobic surfaces. The densely distributed small and well-controlled nanogaps on the accumulated nanostructures function as three-dimensional SERS hot spots. Our results show that the SERS spectra obtained using the substrates are much stronger and more reproducible than that obtained using the nanostructures dispersed in solution. Sensitive detection of melamine and sodium thiocyanate (NaSCN) are achieved using the SERS substrates.
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Affiliation(s)
- Li-An Wu
- Institute of Biophotonics, National Yang-Ming University, Taipei, 112, Taiwan
| | - Wei-En Li
- Institute of Biophotonics, National Yang-Ming University, Taipei, 112, Taiwan
| | - Ding-Zheng Lin
- Material and Chemical Research Laboratory, Industrial Technology Research Institute, Hsinchu, 310, Taiwan
| | - Yih-Fan Chen
- Institute of Biophotonics, National Yang-Ming University, Taipei, 112, Taiwan.
- Biophotonics and Molecular Imaging Research Centre, National Yang-Ming University, Taipei, 112, Taiwan.
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21
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Rossner C, Tang Q, Glatter O, Müller M, Vana P. Uniform Distance Scaling Behavior of Planet-Satellite Nanostructures Made by Star Polymers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2017-2026. [PMID: 28170264 DOI: 10.1021/acs.langmuir.6b04473] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Planet-satellite nanostructures from RAFT star polymers and larger (planet) as well as smaller (satellite) gold nanoparticles are analyzed in experiments and computer simulations regarding the influence of arm number of star polymers. A uniform scaling behavior of planet-satellite distances as a function of arm length was found both in the dried state (via transmission electron microscopy) after casting the nanostructures on surfaces and in the colloidally dispersed state (via simulations and small-angle X-ray scattering) when 2-, 3-, and 6-arm star polymers were employed. This indicates that the planet-satellite distances are mainly determined by the arm length of star polymers. The observed discrepancy between TEM and simulated distances can be attributed to the difference of polymer configurations in dried and dispersed state. Our results also show that these distances are controlled by the density of star polymers end groups, and the number of grabbed satellite particles is determined by the magnitude of the corresponding density. These findings demonstrate the feasibility to precisely control the planet-satellite structures at the nanoscale.
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Affiliation(s)
- Christian Rossner
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen , Tammannstraße 6, D-37077 Göttingen, Germany
| | - Qiyun Tang
- Institut für Theoretische Physik, Georg-August-Universität Göttingen , Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany
| | - Otto Glatter
- Institut für Anorganische Chemie, Technische Universität Graz , Stremayrgasse 9/V, A-8010 Graz, Austria
| | - Marcus Müller
- Institut für Theoretische Physik, Georg-August-Universität Göttingen , Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany
| | - Philipp Vana
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen , Tammannstraße 6, D-37077 Göttingen, Germany
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22
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Lemineur JF, Ritcey AM. Controlled Growth of Gold Nanoparticles Preorganized in Langmuir-Blodgett Monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:12056-12066. [PMID: 27788007 DOI: 10.1021/acs.langmuir.6b02595] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A method is described for the in situ growth of substrate-supported organized gold nanoparticles. Upon exposure to an aqueous solution of a gold salt and a mild reducing agent, the particle size can be significantly increased without any loss of superstructure organization. Furthermore, no secondary nucleation is observed. The surface-supported regrowth procedure can be combined with the Langmuir-Blodgett technique to produce a rich library of plasmonic nanoparticle assemblies. Controlled particle regrowth plays a crucial role in this assembly method because only relatively small metallic nanoparticles can be directly dispersed in polymeric Langmuir-Blodgett films. The versatility of the method is demonstrated through the fabrication of several specific nanoparticle structures, including contiguous plasmonic rings, core-satellite structures, and necklace assemblies. Plasmon extinction spectra are presented for the various nanoparticle superstructures and illustrate the importance of controlling both particle size and assembly architecture in achieving targeted optical properties. The reported approach constitutes a viable bottom-up assembly route for the fabrication of surface-supported nanoparticle superstructures for plasmonic applications.
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Affiliation(s)
- Jean-François Lemineur
- Department of Chemistry and CERMA, Université Laval Pavillon Alexandre-Vachon, 1045 Avenue de la Médecine, Québec, Québec G1 V 0A6, Canada
| | - Anna M Ritcey
- Department of Chemistry and CERMA, Université Laval Pavillon Alexandre-Vachon, 1045 Avenue de la Médecine, Québec, Québec G1 V 0A6, Canada
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23
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Ode K, Honjo M, Takashima Y, Tsuruoka T, Akamatsu K. Highly Sensitive Plasmonic Optical Sensors Based on Gold Core-Satellite Nanostructures Immobilized on Glass Substrates. ACS APPLIED MATERIALS & INTERFACES 2016; 8:20522-6. [PMID: 27482968 DOI: 10.1021/acsami.6b06313] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Fabrication of discrete nanostructures consisting of noble metal nanoparticles immobilized on substrates is challenging because of structural complexity but important for chip-based plasmonic sensor technology. Here we report optical sensing capabilities of core-satellite nanostructures made of gold nanoparticles immobilized on glass substrate, which were fabricated by combining stepwise interconnection of gold nanoparticles through dithiol linkers and surface treatment using vacuum ultraviolet light. The nanostructures exhibit large changes in coupled plasmon resonance peak upon surrounding refractive index, with sensitibity of ca. 350 nm RIU(-1), thus providing highly sensitive optical sensors for determining the surrounding refractive index and detecting organic vapors.
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Affiliation(s)
- Kentaro Ode
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University , 7-1-20 minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Mai Honjo
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University , 7-1-20 minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Yohei Takashima
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University , 7-1-20 minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Takaaki Tsuruoka
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University , 7-1-20 minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
| | - Kensuke Akamatsu
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University , 7-1-20 minatojimaminami, Chuo-ku, Kobe 650-0047, Japan
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24
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Rong Z, Xiao R, Wang C, Wang D, Wang S. Plasmonic Ag Core-Satellite Nanostructures with a Tunable Silica-Spaced Nanogap for Surface-Enhanced Raman Scattering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8129-37. [PMID: 26132410 DOI: 10.1021/acs.langmuir.5b01713] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Plasmonic Ag core-satellite nanostructures were synthesized by utilizing the ultrathin silica shell as a spacer to generate a tunable nanogap between the Ag core and satellites. To synthesize the nanoparticles, Ag nanoparticles (Ag NPs) with a diameter of ∼60 nm were synthesized as cores, on which Raman dyes were adsorbed and then tunable ultrathin silica shells from 2.0 to 6.5 nm were coated, followed by the deposition of Ag NPs as satellites onto the silica surface. The relationships between the SERS signal and the important parameters, including the satellite diameter and the nanogap distance, were studied by experimental methods and theoretical calculations. The maximum SERS intensity of the core-satellite nanoparticles was over 14.6 times stronger than that of the isolated Raman-encoded Ag/PATP@SiO2 NP. The theoretical calculations indicated that the local maximum calculated enhancement factor (EF) of the hot spots with a 2.0 nm nanogap was 9.5 × 10(5). The well-defined Ag core-satellite nanostructures have a high structural uniformity and an anomalously strong electromagnetic enhancement for highly quantitative SERS, leading to a better understanding of hot spot formation and providing new insights into the optimal design and synthesis of the hot SERS nanostructures in a controlled manner.
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Affiliation(s)
- Zhen Rong
- †Beijing Key Laboratory of New Molecular Diagnosis Technologies for Infectious Diseases, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Rui Xiao
- †Beijing Key Laboratory of New Molecular Diagnosis Technologies for Infectious Diseases, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Chongwen Wang
- †Beijing Key Laboratory of New Molecular Diagnosis Technologies for Infectious Diseases, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
| | - Donggen Wang
- §Institute of Transfusion Medicine, Beijing 100850, PR China
| | - Shengqi Wang
- †Beijing Key Laboratory of New Molecular Diagnosis Technologies for Infectious Diseases, Beijing Institute of Radiation Medicine, Beijing 100850, PR China
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25
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Xiong W, Sikdar D, Yap LW, Premaratne M, Li X, Cheng W. Multilayered core-satellite nanoassemblies with fine-tunable broadband plasmon resonances. NANOSCALE 2015; 7:3445-52. [PMID: 25644681 DOI: 10.1039/c4nr06756h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We report on a robust nanotemplating approach to synthesize plasmonic multilayered core-satellite (MCS) nanoassemblies. Templated with gold nanorods, ultrathin Au/Ag alloy cages and satellite gold nanoparticles can be constructed sequentially by galvanic replacement reactions and electrostatic self-assembly, respectively, forming structurally well-defined MCS. The MCS nanoassemblies exhibit strong broadband plasmon resonances from ∼440 to ∼1100 nm, and their resonant features can be fine-tuned by adjusting the size and number density of satellite nanoparticles and by adjusting the thickness of the silica spacer between cage and satellite particles. Such fine-engineered MCS nanoassemblies enable precise programming of the strength and distribution of "hot spots" to maximize the overall enhancement of surface enhanced Raman scattering.
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Affiliation(s)
- Wei Xiong
- Department of Chemical Engineering, Monash University, Clayton 3800, Victoria, Australia.
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26
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Schütz M, Schlücker S. Molecularly linked 3D plasmonic nanoparticle core/satellite assemblies: SERS nanotags with single-particle Raman sensitivity. Phys Chem Chem Phys 2015; 17:24356-60. [DOI: 10.1039/c5cp03189c] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A fast, generic, and suspension-based route to highly SERS-active assemblies of noble metal nanoparticles (Au, Ag) with small core–satellite gaps and single-particle Raman sensitivity is presented.
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Affiliation(s)
- Max Schütz
- University of Duisburg-Essen
- Faculty of Chemistry
- Center for Nanointegration Duisburg-Essen (CENIDE)
- 45141 Essen
- Germany
| | - Sebastian Schlücker
- University of Duisburg-Essen
- Faculty of Chemistry
- Center for Nanointegration Duisburg-Essen (CENIDE)
- 45141 Essen
- Germany
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27
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Cha H, Yoon JH, Yoon S. Probing quantum plasmon coupling using gold nanoparticle dimers with tunable interparticle distances down to the subnanometer range. ACS NANO 2014; 8:8554-63. [PMID: 25089844 DOI: 10.1021/nn5032438] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The assembly of noble metal nanoparticles is an appealing means to control the plasmonic properties of nanostructures. Dimers are particularly interesting because they are a model system that can provide fundamental insights into the interactions between nanoparticles in close proximity. Here, we report a highly efficient and facile assembly method for dimers and other forms of assemblies. Gold nanoparticles (AuNPs) adsorbed on aminosilanized glass surfaces protect the silanes underneath the nanoparticles from hydrolysis. This masked desilanization allows us to prepare AuNP homodimers on glass slides with remarkably high yield (∼90%). The interparticle distance and, accordingly, the surface plasmon coupling are readily tuned at the molecular level using self-assembled monolayers of alkanedithiols. As the interparticle distance is reduced, the resonance surface plasmon coupling progressively redshifts, following the classical electromagnetic model. When the interparticle distance enters the subnanometer regime, however, the resonance band begins to blueshift and significantly broadens. The comparison of our observations with theoretical studies reveals that quantum tunneling effects play a significant role in the plasmonic response of AuNP dimers in the subnanometer gap region. The assembly method based on the masked desilanization is extendable to the formation of various other forms of nanoassemblies and, thus, will further our understanding of plasmonic interactions in nanoassemblies.
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Affiliation(s)
- Hoon Cha
- Department of Chemistry, Dankook University , 152 Jukjeon-ro, Suji-gu, Yongin, Gyeonggi 448-701, Korea
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28
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Tagliazucchi M, Zou F, Weiss EA. Kinetically Controlled Self-Assembly of Latex-Microgel Core-Satellite Particles. J Phys Chem Lett 2014; 5:2775-2780. [PMID: 26278077 DOI: 10.1021/jz5013609] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Latex-microgel core-satellite particles were prepared by electrostatic assembly of negatively charged polystyrene latex and positively charged microgels of a poly(N-isopropylmethacrylamide) (pNIPMAM) and poly[2-methacryloyloxy)ethyl] trimethylammonium chloride (pMETAC) copolymer. The number of satellites per core, determined by scanning electron microscopy, varied from 3 to 10 depending on the sizes of the microgel and latex microparticles. The numbers of satellites per core for different size ratios were compared with the predictions for thermodynamically controlled (maximum packing) and kinetically controlled (random sequential adsorption) assembly, and it was shown that the assembly of latex and microgel proceeds through a random sequential adsorption mechanism. The charges of the microgels and latex particles were retained within the assemblies; therefore, the core-satellite particles have well-defined regions of positive and negative charge. These regions were used to direct the adsorption of gold and latex nanoparticles of opposite charge in order to create multicomponent colloids.
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Affiliation(s)
- Mario Tagliazucchi
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Fengwei Zou
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
| | - Emily A Weiss
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, United States
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29
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Rossner C, Vana P. Planet-Satellite Nanostructures Made To Order by RAFT Star Polymers. Angew Chem Int Ed Engl 2014; 53:12639-42. [DOI: 10.1002/anie.201406854] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Indexed: 01/03/2023]
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30
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Rossner C, Vana P. Kontrollierte Herstellung von Planet-Satellit-Nanostrukturen durch RAFT-Sternpolymere. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406854] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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31
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Tanaka Y, Matsumoto A, Tsuruoka T, Nawafune H, Akamatsu K. Gold Nanoparticle Satellite Nanostructures on a Glass Substrate for Dual-responsive Optical Sensing of Organic Liquids. CHEM LETT 2014. [DOI: 10.1246/cl.140211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Yuya Tanaka
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University
| | - Ai Matsumoto
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University
| | - Takaaki Tsuruoka
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University
| | - Hidemi Nawafune
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University
| | - Kensuke Akamatsu
- Department of Nanobiochemistry, Frontiers of Innovative Research in Science and Technology (FIRST), Konan University
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Salerno KM, Ismail AE, Lane JMD, Grest GS. Coating thickness and coverage effects on the forces between silica nanoparticles in water. J Chem Phys 2014; 140:194904. [DOI: 10.1063/1.4874638] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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