1
|
Wang Y, Zavabeti A, Yao Q, Tran TLC, Yang W, Kong L, Cahill D. Nanobionics-Driven Synthesis of Molybdenum Oxide Nanosheets with Tunable Plasmonic Resonances in Visible Light Regions. ACS APPLIED MATERIALS & INTERFACES 2022; 14:55285-55294. [PMID: 36459620 DOI: 10.1021/acsami.2c19154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Nanobionics-driven synthesis offers a process of designing and synthesizing functional materials on a nanoscale based on the structures and functions of biological systems. An approach such as this is environmentally friendly and sustainable, providing a viable option for synthesizing functional nanomaterials for catalysis and nanoelectronic components. In this work, we present a facile and green nanobionics approach to synthesize plasmonic HxMoO3 by interacting chloroplasts extracted from spinach with two-dimensional (2D) MoO3 nanoflakes. The generated plasmon resonances can be modulated in the visible wavelength ranges, and the efficiency to form the plasmonic materials is enhanced by 90% within 45 min of light excitation compared to reactions without chloroplast involvement. Such a characteristic is ascribed to the interfacial carrier dynamics between the two entities in the reactions, in which highly doped metal oxides with quasi-metallic properties can be formed to generate optical absorptions in the visible light region. The green synthesized plasmonic materials show high photocatalytic activities without the coupling of semiconductors, providing a promising nanoelectronics unit, based on the nanobionics-driven synthesized plasmonic materials.
Collapse
Affiliation(s)
- Yichao Wang
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria3216, Australia
| | - Ali Zavabeti
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria3010, Australia
| | - Qifeng Yao
- Division of Quantum State of Matter, Beijing Academy of Quantum Information Sciences, Beijing100193, China
| | - Thi Linh Chi Tran
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria3216, Australia
| | - Wenrong Yang
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria3216, Australia
| | - Lingxue Kong
- Institute for Frontier Materials, Deakin University, Waurn Ponds, Victoria3216, Australia
| | - David Cahill
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria3216, Australia
| |
Collapse
|
2
|
Jenkinson K, Liz-Marzán LM, Bals S. Multimode Electron Tomography Sheds Light on Synthesis, Structure, and Properties of Complex Metal-Based Nanoparticles. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2110394. [PMID: 35438805 DOI: 10.1002/adma.202110394] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/24/2022] [Indexed: 06/14/2023]
Abstract
Electron tomography has become a cornerstone technique for the visualization of nanoparticle morphology in three dimensions. However, to obtain in-depth information about a nanoparticle beyond surface faceting and morphology, different electron microscopy signals must be combined. The most notable examples of these combined signals include annular dark-field scanning transmission electron microscopy (ADF-STEM) with different collection angles and the combination of ADF-STEM with energy-dispersive X-ray or electron energy loss spectroscopies. Here, the experimental and computational development of various multimode tomography techniques in connection to the fundamental materials science challenges that multimode tomography has been instrumental to overcoming are summarized. Although the techniques can be applied to a wide variety of compositions, the study is restricted to metal and metal oxide nanoparticles for the sake of simplicity. Current challenges and future directions of multimode tomography are additionally discussed.
Collapse
Affiliation(s)
- Kellie Jenkinson
- EMAT and NANOlab Center of Excellence, University of Antwerp, Antwerp, 2020, Belgium
| | - Luis M Liz-Marzán
- CIC biomaGUNE, Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián, 20014, Spain
- Centro de Investigación Biomédica en Red de Bioingeniería Biomateriales, y Nanomedicina (CIBER-BBN), Donostia-San Sebastián, 20014, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao, 48009, Spain
| | - Sara Bals
- EMAT and NANOlab Center of Excellence, University of Antwerp, Antwerp, 2020, Belgium
| |
Collapse
|
3
|
Elibol K, van Aken PA. Uncovering the Evolution of Low-Energy Plasmons in Nanopatterned Aluminum Plasmonics on Graphene. NANO LETTERS 2022; 22:5825-5831. [PMID: 35820031 PMCID: PMC9335878 DOI: 10.1021/acs.nanolett.2c01512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/22/2022] [Indexed: 06/15/2023]
Abstract
We report adjusting the charge-transfer-plasmon (CTP) resonances of aluminum (Al) bowties on suspended monolayer graphene via controlled nanofabrication and focused electron-beam irradiation. CTP resonances of bowties with a conductive junction blue-shift with an increase in junction width, whereas their 3λ/2 and λ resonances barely red-shift. These plasmon modes are derived and confirmed by an LC circuit model and electromagnetic simulations performed with boundary-element and frequency-domain methods. A monotonic decay of the CTP lifetime is observed, while the junction width is extended. Instead, the lifetimes of 3λ/2 and λ resonances are nearly independent of junction width. When the junction is shrunk by electron-beam irradiation, all antenna resonances red-shift. Having created an electron-beam-induced sub 5 nm gap in bowties, we monitor the unambiguous transition of a CTP into a bonding-type gap mode, which is highly sensitive to the separation distance. Meanwhile, the 3λ/2 and λ resonances evolve into dipolar bright and dipolar dark modes.
Collapse
|
4
|
Lapresta-Fernández A, Nefeli Athanasopoulou E, Jacob Silva P, Pelin Güven Z, Stellacci F. Site-selective surface enhanced Raman scattering study of ligand exchange reactions on aggregated Ag nanocubes. J Colloid Interface Sci 2022; 616:110-120. [DOI: 10.1016/j.jcis.2022.02.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 01/19/2022] [Accepted: 02/12/2022] [Indexed: 01/07/2023]
|
5
|
Sciortino F, Cretu O, Karanikolas V, Grasset F, Cordier S, Ariga K, Kuroda T, Kimoto K. Surface Plasmon Tunability of Core-Shell Au@Mo 6 Nanoparticles by Shell Thickness Modification. J Phys Chem Lett 2022; 13:2150-2157. [PMID: 35226485 DOI: 10.1021/acs.jpclett.1c03853] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Plasmon resonances of noble metal nanoparticles are used to enhance light-matter interactions in the nanoworld. The nanoparticles' optical response depends strongly on the dielectric permittivity of the surrounding medium. We show that the plasmon resonance energy of core-shell Au@Mo6 nanoparticles can be tuned from 2.4 to 1.6 eV by varying the thickness of their Mo6 cluster shells between zero and 70 nm, when the core diameter is fixed at 100 nm. We probe their plasmonic response by performing nanometer-resolution plasmon mapping on individual nanoparticles, using electron energy-loss spectroscopy inside a transmission electron microscope. Our experimental results are corroborated by numerical simulations performed using boundary element methods. The simulations predict a similar dependency for the extinction energy, showing that this effect could also be observed by light-optical experiments outside the electron microscope, although limited by the size distribution of the nanoparticles in solution and the substantial scattering effects.
Collapse
Affiliation(s)
- Flavien Sciortino
- Université Grenoble Alpes, CNRS, DCM UMR 5250, Grenoble F-38000, France
| | | | | | - Fabien Grasset
- Univ. Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR), UMR 6226, Rennes F-35000, France
| | - Stéphane Cordier
- Univ. Rennes, CNRS, Institut des Sciences Chimiques de Rennes (ISCR), UMR 6226, Rennes F-35000, France
| | - Katsuhiko Ariga
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | | | | |
Collapse
|
6
|
Park GS, Min KS, Kwon H, Yoon S, Park S, Kwon JH, Lee S, Jo J, Kim M, Kim SK. Strain-Induced Modulation of Localized Surface Plasmon Resonance in Ultrathin Hexagonal Gold Nanoplates. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2100653. [PMID: 34338357 DOI: 10.1002/adma.202100653] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 05/12/2021] [Indexed: 06/13/2023]
Abstract
Anisotropic gold nanoplates (NPLs) have raised the interesting possibility that their reduced geometrical symmetry allows fine tuning of their optical properties associated with the excitation of localized surface plasmon resonances (LSPRs). Recent developments have greatly improved LSPR tunability by utilizing the spatial distribution of LSPR modes. However, the nanoscale interplay between defect-induced mechanical strain and the spatial variation of LSPR modes remains poorly understood. In this work, the combination of high spatial- and spectral-resolution mapping of LSPR modes and nanoscale strain mapping using aberration-corrected transmission electron microscopy are applied to investigate the nanoscale distribution of LSPR modes in an ultrathin single hexagonal gold NPL and the effect of defect-induced strains on its LSPR properties. The electron energy-loss spectral maps reveal four distinct LSPR components and intensity distributions of all LSPR modes in a hexagonal gold NPL. Furthermore, the strain maps provide experimental evidence that the tensile strain field induced by a Z-shaped faulted dipole is responsible for the asymmetric distribution of LSPR intensity in a hexagonal gold NPL.
Collapse
Affiliation(s)
- Gyeong-Su Park
- Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kyung Suk Min
- Department of Chemistry and Department of Biophysics and Chemical Biology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyuksang Kwon
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
| | - Sangwoon Yoon
- Department of Chemistry, Chung-Ang University, Seoul, 06974, Republic of Korea
| | - Sangwon Park
- Department of Chemistry and Department of Biophysics and Chemical Biology, Seoul National University, Seoul, 08826, Republic of Korea
| | - Ji-Hwan Kwon
- Korea Research Institute of Standards and Science, Daejeon, 34113, Republic of Korea
| | - Sangmin Lee
- Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Jaeyeon Jo
- Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Miyoung Kim
- Department of Materials Science and Engineering and Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea
| | - Seong Keun Kim
- Department of Chemistry and Department of Biophysics and Chemical Biology, Seoul National University, Seoul, 08826, Republic of Korea
| |
Collapse
|
7
|
Abed J, Rajput NS, Moutaouakil AE, Jouiad M. Recent Advances in the Design of Plasmonic Au/TiO 2 Nanostructures for Enhanced Photocatalytic Water Splitting. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E2260. [PMID: 33203122 PMCID: PMC7697928 DOI: 10.3390/nano10112260] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 11/08/2020] [Accepted: 11/13/2020] [Indexed: 02/05/2023]
Abstract
Plasmonic nanostructures have played a key role in extending the activity of photocatalysts to the visible light spectrum, preventing the electron-hole combination and providing with hot electrons to the photocatalysts, a crucial step towards efficient broadband photocatalysis. One plasmonic photocatalyst, Au/TiO2, is of a particular interest because it combines chemical stability, suitable electronic structure, and photoactivity for a wide range of catalytic reactions such as water splitting. In this review, we describe key mechanisms involving plasmonics to enhance photocatalytic properties leading to efficient water splitting such as production and transport of hot electrons through advanced analytical techniques used to probe the photoactivity of plasmonics in engineered Au/TiO2 devices. This work also discusses the emerging strategies to better design plasmonic photocatalysts and understand the underlying mechanisms behind the enhanced photoactivity of plasmon-assisted catalysts.
Collapse
Affiliation(s)
- Jehad Abed
- Department of Materials Science and Engineering, University of Toronto, Toronto, ON M5S 3E4, Canada;
| | - Nitul S Rajput
- Department of Mechanical Engineering, Masdar Institute part of Khalifa University of Science and Technology, Abu Dhabi 54224, UAE;
| | | | - Mustapha Jouiad
- Laboratory of Physics of Condensed Mater, University of Picardie Jules Verne, 80039 Amiens, France
| |
Collapse
|
8
|
Vernieres J, Steinhauer S, Zhao J, Grammatikopoulos P, Ferrando R, Nordlund K, Djurabekova F, Sowwan M. Site-Specific Wetting of Iron Nanocubes by Gold Atoms in Gas-Phase Synthesis. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900447. [PMID: 31380190 PMCID: PMC6662390 DOI: 10.1002/advs.201900447] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/04/2019] [Indexed: 05/24/2023]
Abstract
A key challenge in nanotechnology is the rational design of multicomponent materials that beat the properties of their elemental counterparts. At the same time, when considering the material composition of such hybrid nanostructures and the fabrication process to obtain them, one should favor the use of nontoxic, abundant elements in view of the limited availability of critical metals and sustainability. Cluster beam deposition offers a solvent- and, therefore, effluent-free physical synthesis method to achieve nanomaterials with tailored characteristics. However, the simultaneous control of size, shape, and elemental distribution within a single nanoparticle in a small-size regime (sub-10 nm) is still a major challenge, equally limiting physical and chemical approaches. Here, a single-step nanoparticle fabrication method based on magnetron-sputtering inert-gas condensation is reported, which relies on selective wetting of specific surface sites on precondensed iron nanocubes by gold atoms. Using a newly developed Fe-Au interatomic potential, the growth mechanism is decomposed into a multistage model implemented in a molecular dynamics simulation framework. The importance of growth kinetics is emphasized through differences between structures obtained either experimentally or computationally, and thermodynamically favorable configurations determined via global optimization techniques. These results provide a roadmap for engineering complex nanoalloys toward targeted applications.
Collapse
Affiliation(s)
- Jerome Vernieres
- Nanoparticles by Design UnitOkinawa Institute of Science and Technology (OIST) Graduate University1919‐1 TanchaOnna‐son904‐2151OkinawaJapan
| | - Stephan Steinhauer
- Nanoparticles by Design UnitOkinawa Institute of Science and Technology (OIST) Graduate University1919‐1 TanchaOnna‐son904‐2151OkinawaJapan
| | - Junlei Zhao
- Department of Physics and Helsinki Institute of PhysicsUniversity of HelsinkiP.O. Box 43FI‐00014HelsinkiFinland
| | - Panagiotis Grammatikopoulos
- Nanoparticles by Design UnitOkinawa Institute of Science and Technology (OIST) Graduate University1919‐1 TanchaOnna‐son904‐2151OkinawaJapan
| | - Riccardo Ferrando
- Dipartimento di FisicaUniversita di GenovaVia Dodecaneso 33I16146GenovaItaly
| | - Kai Nordlund
- Department of Physics and Helsinki Institute of PhysicsUniversity of HelsinkiP.O. Box 43FI‐00014HelsinkiFinland
| | - Flyura Djurabekova
- Department of Physics and Helsinki Institute of PhysicsUniversity of HelsinkiP.O. Box 43FI‐00014HelsinkiFinland
| | - Mukhles Sowwan
- Nanoparticles by Design UnitOkinawa Institute of Science and Technology (OIST) Graduate University1919‐1 TanchaOnna‐son904‐2151OkinawaJapan
| |
Collapse
|
9
|
|
10
|
Tegg L, Cuskelly D, Keast VJ. Bulk scale fabrication of sodium tungsten bronze nanoparticles for applications in plasmonics. NANOTECHNOLOGY 2018; 29:40LT02. [PMID: 30004026 DOI: 10.1088/1361-6528/aad34b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In order to advance plasmon-based technologies, new materials with low damping losses and high chemical stability are needed. In this letter, we report the bulk scale fabrication of sodium tungsten bronze (Na x WO3) nanoparticles with high Na content (x ≤ 0.83) using a furnace-assisted method. Phase purity and morphology is confirmed with x-ray diffraction and scanning electron microscopy. Plasmon responses are characterized using spectrophotometry and spatially-resolved electron energy-loss spectroscopy (EELS) in a scanning transmission electron microscope. Experimental EELS maps of individual nanoparticles show the excitation of distinct plasmon resonances at visible and near-infrared (NIR) frequencies, and these observations are supported by boundary element method simulations. Na x WO3 is a promising alternative material for plasmonics due to its strong plasmon resonances when compared to Au, its simple nanofabrication, and low cost. In particular, their high NIR extinction makes these materials ideal for applications in solar control window coatings or plasmonic photocatalysis.
Collapse
Affiliation(s)
- Levi Tegg
- School of Mathematical and Physical Sciences, University of Newcastle, Callaghan, NSW 2308, Australia
| | | | | |
Collapse
|
11
|
Chahinez D, Reji T, Andreas R. Modeling of the surface plasmon resonance tunability of silver/gold core-shell nanostructures. RSC Adv 2018; 8:19616-19626. [PMID: 35540971 PMCID: PMC9080668 DOI: 10.1039/c8ra03261k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 05/21/2018] [Indexed: 01/20/2023] Open
Abstract
Tunable plasmonic noble metal nanoparticles are indispensable for chemical sensors and optical near field enhancement applications. Laser wavelengths within the absorption spectrum of the nanoparticle and Localized Surface Plasmon Resonances (LSPR) in the visible and near infrared range are the key points to be met for the successful utilization in the field of aforementioned high sensitivity sensors. This way, Surface Enhanced Raman Spectroscopy (SERS) has been pushed to the sensitivity level of single molecule. The tunability, i.e. the modulation of the surface plasmon resonance wavelength as a function of the ambient refractive index is one of the important criteria to be understood clearly. Among various noble metals, gold and silver nanoparticles have the strongest surface enhancement factors for the Raman signal and their tunability for many practical applications has been experimentally demonstrated. We present a comprehensive numerical investigation by means of a finite element analysis on Ag/Au core-shell nanospheres including agglomerated and non-agglomerated dimers. Tunability as a function of shell thickness, total nanosphere radius and fraction of overlap between the dimer is discussed. Our studies show that tunability is considerably affected by the nanosphere radius rather than the shell thickness. These findings may be helpful in the synthesis of nanoplasmonic structures, especially related to an optimized use of gold as the shell material for the targeted application.
Collapse
Affiliation(s)
- Dab Chahinez
- Nanophotonics-Nanoelectronics, Institut National de la Recherche Scientifique INRS-EMT 1650 Boul. Lionel-Boulet Varennes J3X 1S2 Canada
| | - Thomas Reji
- Division of Research and Development, Lovely Professional University G.T. Road Phagwara Punjab 144411 India
| | - Ruediger Andreas
- Nanophotonics-Nanoelectronics, Institut National de la Recherche Scientifique INRS-EMT 1650 Boul. Lionel-Boulet Varennes J3X 1S2 Canada
- Department of Electrical Engineering and Information Technology, Université de Sherbrooke, 2500, Boul. Université Sherbrooke J1K 2R1 Canada
| |
Collapse
|
12
|
Rajput NS, Shao-Horn Y, Li XH, Kim SG, Jouiad M. Investigation of plasmon resonance in metal/dielectric nanocavities for high-efficiency photocatalytic device. Phys Chem Chem Phys 2018; 19:16989-16999. [PMID: 28597895 DOI: 10.1039/c7cp03212a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Photocatalytic nanostructures loaded with metallic nanoparticles are being considered as a potential candidate for designing efficient water splitting devices. Here, we aim to unveil the plasmonic behavior of a device made of Au-TiO2 nanostructures through in-depth investigations combining electron energy loss spectroscopy (EELS) and cathodoluminescence (CL). The experiments confirm the existence of Au bulk plasmon excitation, intrinsic interband transitions, and plasmon losses over a wide range of energies (0.6-2.4 eV). Depending on the size and the shape of the obtained nanostructures, such as fishing hook (FH), asymmetric nanorod (AR), and a/symmetric nanoparticles, in our devices, the dephasing times and the quality factors of the modes vary. Finite difference time domain simulations were then carried out on FH and AR structures. These simulations indicate good agreement between the electric field enhancement and the obtained plasmon excitation as observed in EELS. Moreover, the plasmonic activity obtained by CL and EELS was correlated with the photocurrent measurements recorded with the device, which confirmed that the localized plasmons in Au generate hot electrons and enhance the photoresponse of the device. This study confirms the functionality of the metal dielectric photocatalyst device over a wide range of wavelengths ranging from UV to near IR.
Collapse
Affiliation(s)
- Nitul S Rajput
- Materials Science and Engineering, Masdar Institute of Science and Technology, Abu Dhabi, United Arab Emirates.
| | | | | | | | | |
Collapse
|
13
|
Wu Y, Li G, Camden JP. Probing Nanoparticle Plasmons with Electron Energy Loss Spectroscopy. Chem Rev 2017; 118:2994-3031. [DOI: 10.1021/acs.chemrev.7b00354] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yueying Wu
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Guoliang Li
- Center for Electron Microscopy, Institute for New Energy Materials and Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Jon P. Camden
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| |
Collapse
|
14
|
Thiele M, Knauer A, Malsch D, Csáki A, Henkel T, Köhler JM, Fritzsche W. Combination of microfluidic high-throughput production and parameter screening for efficient shaping of gold nanocubes using Dean-flow mixing. LAB ON A CHIP 2017; 17:1487-1495. [PMID: 28327746 DOI: 10.1039/c7lc00109f] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Metal nanoparticles and their special optical properties, the so-called localized surface plasmon resonance (LSPR), facilitate many applications in various fields. Due to the strong dependency of the LSPR on particle geometry, their synthesis is a challenging and time-consuming procedure especially for non-spherical shapes. In contrast, micromixers offer new experimental approaches and therefore enable the simplification of several processes. By using a zigzag micromixer (Dean-Flow-Mixer, DFM) that induces Dean-flow secondary flow patterns, we theoretically and experimentally show the mixing efficiency. Thus, we highlight the advantages of using it in the multistep synthesis of Au nanoparticles. Based on a narrow size distribution of Au nanocubes and an increased yield in combination with higher reproducibility, we depict the need for and advantage of the DFM to control the incubation times during the growth process. We further show that, by using the DFM, easy and very fast Au nanocube edge length tuning (53 nm, 58 nm, 70 nm and 75 nm) is possible by simultaneously reducing the consumption of the materials by up to 95%. We finally demonstrate the versatile abilities by using the DFM for parameter screening on examples of different halides and accessible bromide in the growth solutions. Therefore, we highlight the optimal concentration for the different growth regimes and the influences on the Au nanoparticle morphology (spheres, cubes and rods) and their defined shaping.
Collapse
Affiliation(s)
- Matthias Thiele
- Dept. of Nano Biophotonics, Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Straße 9, 07745 Jena, Germany. andrea.csaki(at)ipht-jena.de
| | | | | | | | | | | | | |
Collapse
|
15
|
Flauraud V, Mastrangeli M, Bernasconi GD, Butet J, Alexander DTL, Shahrabi E, Martin OJF, Brugger J. Nanoscale topographical control of capillary assembly of nanoparticles. NATURE NANOTECHNOLOGY 2017; 12:73-80. [PMID: 27694849 DOI: 10.1038/nnano.2016.179] [Citation(s) in RCA: 175] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 08/17/2016] [Indexed: 05/22/2023]
Abstract
Predetermined and selective placement of nanoparticles onto large-area substrates with nanometre-scale precision is essential to harness the unique properties of nanoparticle assemblies, in particular for functional optical and electro-optical nanodevices. Unfortunately, such high spatial organization is currently beyond the reach of top-down nanofabrication techniques alone. Here, we demonstrate that topographic features comprising lithographed funnelled traps and auxiliary sidewalls on a solid substrate can deterministically direct the capillary assembly of Au nanorods to attain simultaneous control of position, orientation and interparticle distance at the nanometre level. We report up to 100% assembly yield over centimetre-scale substrates. We achieve this by optimizing the three sequential stages of capillary nanoparticle assembly: insertion of nanorods into the traps, resilience against the receding suspension front and drying of the residual solvent. Finally, using electron energy-loss spectroscopy we characterize the spectral response and near-field properties of spatially programmable Au nanorod dimers, highlighting the opportunities for precise tunability of the plasmonic modes in larger assemblies.
Collapse
Affiliation(s)
- Valentin Flauraud
- Microsystems Laboratory, Institute of Microtechnique, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Massimo Mastrangeli
- Department of Bio, Electro and Mechanical Systems, Université Libre de Bruxelles, 1050 Bruxelles, Belgium
| | - Gabriel D Bernasconi
- Nanophotonics and Metrology Laboratory, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Jeremy Butet
- Nanophotonics and Metrology Laboratory, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Duncan T L Alexander
- Interdisciplinary Center for Electron Microscopy, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Elmira Shahrabi
- Microsystems Laboratory, Institute of Microtechnique, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Olivier J F Martin
- Nanophotonics and Metrology Laboratory, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Juergen Brugger
- Microsystems Laboratory, Institute of Microtechnique and Institute of Materials, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| |
Collapse
|
16
|
Marinica DC, Aizpurua J, Borisov AG. Quantum effects in the plasmon response of bimetallic core-shell nanostructures. OPTICS EXPRESS 2016; 24:23941-23956. [PMID: 27828228 DOI: 10.1364/oe.24.023941] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report a quantum mechanical study of the plasmonic response of bimetallic spherical core/shell nanoparticles. The systems comprise up to 104 electrons and their optical response is addressed with Time Dependent Density Functional Theory calculations. These quantum results are compared with classical electromagnetic calculations for core/shell systems formed by Al/Na, Al/Au and Ag/Na, as representative examples of bimetallic systems. We show that for shell widths in the nanometer range, the system cannot be described as a simple stack of two metals. The finite size effect and the transition layer formed between the core and the shell strongly modify the optical properties of the compound nanoparticle. In particular this configuration leads to a frequency shift of the plasmon resonance with shell character and an increased plasmon decay into electron-hole pairs which eventually quenches this resonance for very thin shells. This effect is difficult to capture with a classical theory even upon adjustment of the parameters of a combination of metallic dielectric functions.
Collapse
|
17
|
Han S, Zhou G, Fu Y, Ma Y, Xu L, Zou C, Chen W, Yang Y, Huang S. The alloying effect and AgCl-directing growth for synthesizing a trimetallic nanoring with improved SERS. NANOSCALE 2015; 7:20414-20425. [PMID: 26502355 DOI: 10.1039/c5nr05531h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report the synthesis of high quality trimetallic Au/Ag/Pt nanorings (TAAPNs) by using Au/Ag alloy decahedra (AAAD) as templates. The alloying effect and AgCl-directing growth have been investigated in detail during the formation of TAAPN. It was found that the doping of Ag in AAAD changes the surrounding environment of Au atoms and decreases the oxidization reduction potential (ORP) of [AuCl(2)](-)/Au because of the alloying effect, resulting in the dissolved O(2) molecules that serve as an effective etchant for oxidizing Au to Au(I). Ascorbic acid (AA) and chloroplatinic acid (H(2)PtCl(6)) are weak acids which can accelerate the etching by increasing the concentration of H(+). The AgCl selectively absorbs on {100} of the decahedra and induces the preferential deposition of H(2)PtCl(6) here via their complexing interaction. AA reduces Pt(IV) and Ag(I) to atoms which grow on {100} facets. The formed Pt/Ag layer changes the etching direction from along [100] to [111] and generates the TAAPN. Besides, it has been noted that the TAAPNs exhibit good Surface Enhanced Raman Scattering (SERS) performance.
Collapse
Affiliation(s)
- Shuhua Han
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, P. R. China.
| | - Guangju Zhou
- College of Materials and Chemical Engineering, Hainan University, Haikou, HaiNan 570228, P. R. China
| | - Yunzhi Fu
- College of Materials and Chemical Engineering, Hainan University, Haikou, HaiNan 570228, P. R. China
| | - Ying Ma
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, P. R. China.
| | - Li Xu
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, P. R. China.
| | - Chao Zou
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, P. R. China.
| | - Wei Chen
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, P. R. China.
| | - Yun Yang
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, P. R. China.
| | - Shaoming Huang
- Nanomaterials and Chemistry Key Laboratory, Wenzhou University, Wenzhou, Zhejiang 325027, P. R. China.
| |
Collapse
|
18
|
Resonances of nanoparticles with poor plasmonic metal tips. Sci Rep 2015; 5:17431. [PMID: 26617270 PMCID: PMC4663493 DOI: 10.1038/srep17431] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 10/29/2015] [Indexed: 01/12/2023] Open
Abstract
The catalytic and optical properties of metal nanoparticles can be combined to create
platforms for light-driven chemical energy storage and enhanced in-situ
reaction monitoring. However, the heavily damped plasmon resonances of many
catalytically active metals (e.g. Pt, Pd) prevent this dual functionality in pure
nanostructures. The addition of catalytic metals at the surface of efficient
plasmonic particles thus presents a unique opportunity if the resonances can be
conserved after coating. Here, nanometer resolution electron-based techniques
(electron energy loss, cathodoluminescence, and energy dispersive X-ray
spectroscopy) are used to show that Au particles incorporating a catalytically
active but heavily damped metal, Pd, sustain multiple size-dependent localized
surface plasmon resonances (LSPRs) that are narrow and strongly localized at the
Pd-rich tips. The resonances also couple with a dielectric substrate and other
nanoparticles, establishing that the full range of plasmonic behavior is observed in
these multifunctional nanostructures despite the presence of Pd.
Collapse
|
19
|
Křápek V, Koh AL, Břínek L, Hrtoň M, Tomanec O, Kalousek R, Maier SA, Šikola T. Spatially resolved electron energy loss spectroscopy of crescent-shaped plasmonic antennas. OPTICS EXPRESS 2015; 23:11855-11867. [PMID: 25969276 DOI: 10.1364/oe.23.011855] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We present a study of the optical properties of gold crescent-shaped antennas by means of electron energy loss spectroscopy. These structures exhibit particularly large field enhancement near their sharp features, support two non-degenerate dipolar (i.e., optically active) localised surface plasmon resonances, and are widely tunable by a choice of their shape and dimensions. Depending on the volume and shape, we resolved up to four plasmon resonances in metallic structures under study in the energy range of 0.8 - 2.4 eV: two dipolar and quadrupolar mode and a multimodal assembly. The boundary-element-method calculations reproduced the observed spectra and helped to identify the character of the resonances. The two lowest modes are of particular importance owing to their dipolar nature. Remarkably, they are both concentrated near the tips of the crescent, spectrally well resolved and their energies can be tuned between 0.8 - 1.5 eV and 1.2 - 2.0 eV, respectively. As the lower spectral range covers the telecommunication wavelengths 1.30 and 1.55 μm, we envisage the possible use of such nanostructures in infrared communication technology.
Collapse
|
20
|
Tuning interior nanogaps of double-shelled Au/Ag nanoboxes for surface-enhanced Raman scattering. Sci Rep 2015; 5:8382. [PMID: 25670352 PMCID: PMC4323660 DOI: 10.1038/srep08382] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 01/19/2015] [Indexed: 12/31/2022] Open
Abstract
Double-shelled Au/Ag hollow nanoboxes with precisely controlled interior nanogaps (1 to 16 nm) were synthesized for gap-tunable surface-enhanced Raman scattering (SERS). The double-shelled nanoboxes were prepared via a two-step galvanic replacement reaction approach using Ag nanocubes as the templates, while 4-aminothiolphenol (4-ATP) as SERS probe molecules were loaded between the two shells. More than 10-fold enhancement of SERS is observed from the double-shelled nanoboxes than Ag nanocubes. In addition, the SERS of the double-shelled nanoboxes increase significantly with the decrease of gap size, consistent with the theoretical prediction that smaller gap size induces larger localized electromagnetic enhancement.
Collapse
|