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Lim SWD, Park JS, Kazakov D, Spägele CM, Dorrah AH, Meretska ML, Capasso F. Point singularity array with metasurfaces. Nat Commun 2023; 14:3237. [PMID: 37277345 DOI: 10.1038/s41467-023-39072-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 05/23/2023] [Indexed: 06/07/2023] Open
Abstract
Phase singularities are loci of darkness surrounded by monochromatic light in a scalar field, with applications in optical trapping, super-resolution imaging, and structured light-matter interactions. Although 1D singular structures, like optical vortices, are common due to their robust topological properties, uncommon 0D (point) and 2D (sheet) singularities can be generated by wavefront-shaping devices like metasurfaces. With the design flexibility of metasurfaces, we deterministically position ten identical point singularities using a single illumination source. The phasefront is inverse-designed using phase-gradient maximization with an automatically-differentiable propagator and produces tight longitudinal intensity confinement. The array is experimentally realized with a TiO2 metasurface. One possible application is blue-detuned neutral atom trap arrays, for which this field would enforce 3D confinement and a potential depth around 0.22 mK per watt of incident laser power. We show that metasurface-enabled point singularity engineering may significantly simplify and miniaturize the optical architecture for super-resolution microscopes and dark traps.
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Affiliation(s)
- Soon Wei Daniel Lim
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA.
| | - Joon-Suh Park
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
- Nanophotonics Research Center, Korea Institute of Science and Technology, Seoul, 02792, Republic of Korea
| | - Dmitry Kazakov
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
| | - Christina M Spägele
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
| | - Ahmed H Dorrah
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
| | - Maryna L Meretska
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
| | - Federico Capasso
- Harvard John A. Paulson School of Engineering and Applied Sciences, 9 Oxford Street, Cambridge, MA, 02138, USA
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2
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Feltin N, Crouzier L, Delvallée A, Pellegrino F, Maurino V, Bartczak D, Goenaga-Infante H, Taché O, Marguet S, Testard F, Artous S, Saint-Antonin F, Salzmann C, Deumer J, Gollwitzer C, Koops R, Sebaïhi N, Fontanges R, Neuwirth M, Bergmann D, Hüser D, Klein T, Hodoroaba VD. Metrological Protocols for Reaching Reliable and SI-Traceable Size Results for Multi-Modal and Complexly Shaped Reference Nanoparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:993. [PMID: 36985886 PMCID: PMC10057439 DOI: 10.3390/nano13060993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
The study described in this paper was conducted in the framework of the European nPSize project (EMPIR program) with the main objective of proposing new reference certified nanomaterials for the market in order to improve the reliability and traceability of nanoparticle size measurements. For this purpose, bimodal populations as well as complexly shaped nanoparticles (bipyramids, cubes, and rods) were synthesized. An inter-laboratory comparison was organized for comparing the size measurements of the selected nanoparticle samples performed with electron microscopy (TEM, SEM, and TSEM), scanning probe microscopy (AFM), or small-angle X-ray scattering (SAXS). The results demonstrate good consistency of the measured size by the different techniques in cases where special care was taken for sample preparation, instrument calibration, and the clear definition of the measurand. For each characterization method, the calibration process is described and a semi-quantitative table grouping the main error sources is proposed for estimating the uncertainties associated with the measurements. Regarding microscopy-based techniques applied to complexly shaped nanoparticles, data dispersion can be observed when the size measurements are affected by the orientation of the nanoparticles on the substrate. For the most complex materials, hybrid approaches combining several complementary techniques were tested, with the outcome being that the reliability of the size results was improved.
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Affiliation(s)
- Nicolas Feltin
- Laboratoire National de Métrologie et d’Essais (LNE), 29 Avenue Roger Hennequin, 78197 Trappes, France
| | - Loïc Crouzier
- Laboratoire National de Métrologie et d’Essais (LNE), 29 Avenue Roger Hennequin, 78197 Trappes, France
| | - Alexandra Delvallée
- Laboratoire National de Métrologie et d’Essais (LNE), 29 Avenue Roger Hennequin, 78197 Trappes, France
| | - Francesco Pellegrino
- Dipartimento di Chimica and NIS Inter-Department Centre, University of Torino, Via P. Giuria, 10125 Torino, Italy
| | - Valter Maurino
- Dipartimento di Chimica and NIS Inter-Department Centre, University of Torino, Via P. Giuria, 10125 Torino, Italy
| | - Dorota Bartczak
- National Measurement Laboratory, LGC Limited, Queens Road, Teddington TW11 0LY, UK
| | | | - Olivier Taché
- CEA, CNRS, NIMBE, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Sylvie Marguet
- CEA, CNRS, NIMBE, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Fabienne Testard
- CEA, CNRS, NIMBE, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Sébastien Artous
- CEA, Liten, DTNM, Université Grenoble Alpes, 38000 Grenoble, France
| | | | - Christoph Salzmann
- Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 44-46, 12203 Berlin, Germany
| | - Jérôme Deumer
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2–12, 10587 Berlin, Germany
| | - Christian Gollwitzer
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2–12, 10587 Berlin, Germany
| | - Richard Koops
- VSL National Metrology Institute, Thjsseweg 11, 2629 JA Delft, The Netherlands
| | - Noham Sebaïhi
- National Standards (SMD), FPS Economy, 16 Bd du Roi Albert II, B-1000 Brussels, Belgium
| | - Richard Fontanges
- Pollen Metrology, 122 Rue du Rocher de Lorzier, Novespace A, 38430 Moirans, France
| | - Matthias Neuwirth
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - Detlef Bergmann
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - Dorothee Hüser
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - Tobias Klein
- Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
| | - Vasile-Dan Hodoroaba
- Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 44-46, 12203 Berlin, Germany
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3
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Vernon AJ, Rodríguez-Fortuño FJ. Creating and moving nanoantenna cold spots anywhere. LIGHT, SCIENCE & APPLICATIONS 2022; 11:258. [PMID: 36042190 PMCID: PMC9427961 DOI: 10.1038/s41377-022-00893-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 05/30/2022] [Accepted: 06/14/2022] [Indexed: 06/07/2023]
Abstract
Cold spots are sub-wavelength regions which might emerge near a nanoantenna, should one or more components of some far-field illumination cancel out with scattered light. We show that by changing only the polarisation, amplitude, and phase of two plane waves, a unique, zero-magnitude and highly sub-wavelength cold spot can be created and moved anywhere in the space around a nanoantenna of any arbitrary shape. This can be achieved using ultra-fast modulated pulses, or a time-harmonic approximation. Easily disturbed by a change in the nanoantenna's material or position, a manufactured cold spot is fragile and could be used in nanoscale sensing. Our technique exploits the linearity of Maxwell's equations and could be adapted to manipulate any phenomena governed by the linear wave equation, including acoustic scattering. This is a means for potentially ultra-fast sub-wavelength electric field manipulation.
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Affiliation(s)
- Alex J Vernon
- Department of Physics, King's College London, Strand, London, WC2R 2LS, United Kingdom.
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4
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Deumer J, Pauw BR, Marguet S, Skroblin D, Taché O, Krumrey M, Gollwitzer C. Small-angle X-ray scattering: characterization of cubic Au nanoparticles using Debye's scattering formula. J Appl Crystallogr 2022; 55:993-1001. [PMID: 35974742 PMCID: PMC9348877 DOI: 10.1107/s160057672200499x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 05/10/2022] [Indexed: 12/02/2022] Open
Abstract
A versatile software package in the form of a Python extension, named CDEF (computing Debye's scattering formula for extraordinary form factors), is proposed to calculate approximate scattering profiles of arbitrarily shaped nanoparticles for small-angle X-ray scattering (SAXS). CDEF generates a quasi-randomly distributed point cloud in the desired particle shape and then applies the open-source software DEBYER for efficient evaluation of Debye's scattering formula to calculate the SAXS pattern (https://github.com/j-from-b/CDEF). If self-correlation of the scattering signal is not omitted, the quasi-random distribution provides faster convergence compared with a true-random distribution of the scatterers, especially at higher momentum transfer. The usage of the software is demonstrated for the evaluation of scattering data of Au nanocubes with rounded edges, which were measured at the four-crystal monochromator beamline of PTB at the synchrotron radiation facility BESSY II in Berlin. The implementation is fast enough to run on a single desktop computer and perform model fits within minutes. The accuracy of the method was analyzed by comparison with analytically known form factors and verified with another implementation, the SPONGE, based on a similar principle with fewer approximations. Additionally, the SPONGE coupled to McSAS3 allows one to retrieve information on the uncertainty of the size distribution using a Monte Carlo uncertainty estimation algorithm.
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Affiliation(s)
- Jérôme Deumer
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2–12, 10587 Berlin, Germany
| | - Brian R. Pauw
- Federal Institute for Materials Research and Testing (BAM), Unter den Eichen 87, 12205 Berlin, Germany
| | - Sylvie Marguet
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Dieter Skroblin
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2–12, 10587 Berlin, Germany
| | - Olivier Taché
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Michael Krumrey
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2–12, 10587 Berlin, Germany
| | - Christian Gollwitzer
- Physikalisch-Technische Bundesanstalt (PTB), Abbestraße 2–12, 10587 Berlin, Germany
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5
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Capitaine A, Sciacca B. Nanocube Epitaxy for the Realization of Printable Monocrystalline Nanophotonic Surfaces. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2200364. [PMID: 35398953 DOI: 10.1002/adma.202200364] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 04/04/2022] [Indexed: 05/27/2023]
Abstract
Plasmonic nanoparticles of the highest quality can be obtained via colloidal synthesis at low-cost. Despite the strong potential for integration in nanophotonic devices, the geometry of colloidal plasmonic nanoparticles is mostly limited to that of platonic solids. This is in stark contrast to nanostructures obtained by top-down methods that offer unlimited capability for plasmon resonance engineering, but present poor material quality and have doubtful perspectives for scalability. Here, an approach that combines the best of the two worlds by transforming assemblies of single-crystal gold nanocube building blocks into continuous monocrystalline plasmonic nanostructures with an arbitrary shape, via epitaxy in solution at near ambient temperature, is introduced. Nanocube dimers are used as a nanoreactor model system to investigate the mechanism in operando, revealing competitive redox processes of oxidative etching at the nanocube corners and simultaneous heterogeneous nucleation at their surface, that ensure filling of the sub-nanometer gap in a self-limited manner. Applying this procedure to nanocube arrays assembled in a patterned poly(dimethylsiloxane) (PDMS) substrate, it is able to obtain printable monocrystalline nanoantenna arrays that can be swiftly integrated in devices. This may lead to the implementation of low-cost nanophotonic surfaces of the highest quality in industrial products.
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Affiliation(s)
- Anna Capitaine
- Aix Marseille Univ, CNRS, CINaM, AMUtech, Marseille, France
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6
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Kamal Hossain M. Nanoscale Imaging of Interstitial-dependent Optical Confinement through Near-Field Scanning Optical Microscopy. CHEM REC 2022; 22:e202200108. [PMID: 35585028 DOI: 10.1002/tcr.202200108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Indexed: 11/08/2022]
Abstract
Exploitation of optical confinement in nanoscale unveils a wealth of information about the structure, optical, electronic, and chemical properties of the materials. However, realizing such confinement by optical microscopy and spectroscopic techniques have remained challenging due to fundamental formulation that is related to the diffraction theory of light. A state-of-art technique, known as near-field scanning optical microscopy (NSOM) has the ability to break such diffraction limitation, as the spatial resolution depends on the near-field probe diameter and the distance between the probe and the surface. A home-built apertured NSOM (a-NSOM) developed in the beginning of NSOM discovery facilitated to investigate N-particles nano-assemblies, where N is two or more. Through surface-sensitive spectroscopy such as surface-enhanced Raman scattering (SERS) and surface-enhanced two-photon-induced photoluminescence (TPI-PL), a correlated optometrology was revealed by taking snapshots of shear-force topography, SERS and TPI-PL simultaneously in single-channel and multi-channel detection system. Here in this "Personal Account" we have decorated near-field optical confinement observed by a-NSOM in three constructs; archetype dimer, nano-assembly of few nanoparticles and long-range two-dimensional (2D) nano-assembly. In the case of dimer, optical confinement was localized and interstitial-dependent whereas coalescence of nearby confinements was reported in few particles nanoaggregate. In the case of 2D nano-assembly, optical confinements were more complex because a nanoparticle was surrounded by six or more adjacent nanoparticles. FDTD simulation were carried out to support and validate the experimental observations. Such observations in nanoscale taking snapshots of nanometric topography and surface-sensitive spectroscopic signal not only inspire us to understand optical confinements in near-field, but also implement the concept in designing miniaturized and efficient system.
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Affiliation(s)
- Mohammad Kamal Hossain
- Interdisciplinary Research Center for Renewable Energy and Power systems (IRC-REPS), Research Institute, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran, 31261, Saudi Arabia
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7
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Thomas EM, Cortes CL, Paul L, Gray S, Thomas KG. Combined Effects of Emitter-Emitter and Emitter-Plasmonic Surface Separations Dictate Photoluminescence Enhancement in Plasmonic Field. Phys Chem Chem Phys 2022; 24:17250-17262. [DOI: 10.1039/d2cp01681h] [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 brightness of an emitter can be enhanced by metal-enhanced fluorescence, wherein the excitonic dipole couples with the electromagnetic field of the surface plasmon. Herein, we experimentally map the landscape...
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8
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Hossain MK, Kitahama Y, Ozaki Y. Half-raspberry-like bimetallic nanoassembly: Interstitial dependent correlated surface plasmon resonances and surface-enhanced Raman spectroscopy. Phys Chem Chem Phys 2021; 23:23875-23885. [PMID: 34651624 DOI: 10.1039/d1cp03402b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correlated localized surface plasmon resonance (SPR), surface-enhanced Raman scattering (SERS) and localized electromagnetic (EM) field distributions of pure and modified gold (Au) nanoassemblies have been demonstrated. The Au nanoassemblies were decorated as half-raspberry-like nanostructures by silver (Ag) mists, and the characteristics of their SPR and SERS were observed at the same spatial position with and without decoration. The decoration of Au nanoassemblies was analyzed in-depth and confirmed by atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). Multifunctional and lab-built microscopy was used to capture correlated SPR and SERS imaging and spectral measurements. Without decoration, strong SPR peaks and enhanced SERS signals were observed, whereas intense plasmon excitation deteriorated with a broadening and diminishing peak and the SERS enhancement dropped at least by 10 fold upon the modification. Preferential enhancement near the edge was observed in the correlated SPR and SERS measurements. The variations in localized SPR, subsequent SERS enhancement, and preferential confinement were speculated concerning localized EM near-field deformation. A typical tetramer with five interstitials was modeled and simulated by finite difference time domain (FDTD) analysis at different incident polarizations. The EM near-field distributions were extracted with and without decoration of constituent interstitials by Ag mists. Without the modification of participating interstitials, the EM near-field distributions were found confined, whereas additional EM near-field confinements were observed in the presence of Ag mists. Such EM near-field deformations due to the modification of constituent interstitials were supposed to broaden and deteriorate SPR characteristics of Au nanoassemblies as observed under this investigation.
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Affiliation(s)
- Mohammad Kamal Hossain
- Interdisciplinary Research Center for Renewable Energy and Power Systems (IRC-REPS), Research Institute, King Fahd University of Petroleum & Minerals (KFUPM), Dhahran 31261, Kingdom of Saudi Arabia.
| | - Yasutaka Kitahama
- School of Biological and Environmental Sciences, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
| | - Yukihiro Ozaki
- School of Biological and Environmental Sciences, Kwansei Gakuin University, Gakuen 2-1, Sanda, Hyogo 669-1337, Japan
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9
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Niu R, Song C, Gao F, Fang W, Jiang X, Ren S, Zhu D, Su S, Chao J, Chen S, Fan C, Wang L. DNA Origami-Based Nanoprinting for the Assembly of Plasmonic Nanostructures with Single-Molecule Surface-Enhanced Raman Scattering. Angew Chem Int Ed Engl 2021; 60:11695-11701. [PMID: 33694256 DOI: 10.1002/anie.202016014] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 03/01/2021] [Indexed: 12/24/2022]
Abstract
Metallic nanocube ensembles exhibit tunable localized surface plasmon resonance to induce the light manipulation at the subwavelength scale. Nevertheless, precisely control anisotropic metallic nanocube ensembles with relative spatial directionality remains a challenge. Here, we report a DNA origami based nanoprinting (DOBNP) strategy to transfer the essential DNA strands with predefined sequences and positions to the surface of the gold nanocubes (AuNCs). These DNA strands ensured the specific linkages between AuNCs and gold nanoparticles (AuNPs) that generating the stereo-controlled AuNC-AuNP nanostructures (AANs) with controlled geometry and composition. By anchoring the single dye molecule in hot spot regions, the dramatic enhanced electromagnetic field aroused stronger surface enhanced Raman scattering (SERS) signal amplification. Our approach opens the opportunity for the fabrication of stereo-controlled metal nanostructures for designing highly sensitive photonic devices.
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Affiliation(s)
- Renjie Niu
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Chunyuan Song
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Fei Gao
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Weina Fang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
| | - Xinyu Jiang
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Shaokang Ren
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Dan Zhu
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Shao Su
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Jie Chao
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Shufen Chen
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, and Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Lianhui Wang
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
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10
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Niu R, Song C, Gao F, Fang W, Jiang X, Ren S, Zhu D, Su S, Chao J, Chen S, Fan C, Wang L. DNA Origami‐Based Nanoprinting for the Assembly of Plasmonic Nanostructures with Single‐Molecule Surface‐Enhanced Raman Scattering. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Renjie Niu
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Chunyuan Song
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Fei Gao
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Weina Fang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes Department of Chemistry School of Chemistry and Molecular Engineering East China Normal University Dongchuan Road 500 Shanghai 200241 China
| | - Xinyu Jiang
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Shaokang Ren
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Dan Zhu
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Shao Su
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Jie Chao
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Shufen Chen
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, and Institute of Molecular Medicine Renji Hospital School of Medicine Shanghai Jiao Tong University Shanghai 200240 China
| | - Lianhui Wang
- Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials (IAM) National Synergetic Innovation Center for Advanced Materials (SICAM) Nanjing University of Posts and Telecommunications 9 Wenyuan Road Nanjing 210023 China
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11
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Stanzel M, Zhao L, Mohammadi R, Pardehkhorram R, Kunz U, Vogel N, Andrieu-Brunsen A. Simultaneous Nanolocal Polymer and In Situ Readout Unit Placement in Mesoporous Separation Layers. Anal Chem 2021; 93:5394-5402. [PMID: 33724794 PMCID: PMC8027984 DOI: 10.1021/acs.analchem.0c04446] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 02/24/2021] [Indexed: 11/28/2022]
Abstract
Bioinspired solid-state nanopores and nanochannels have attracted interest in the last two decades, as they are envisioned to advance future sensing, energy conversion, and separation concepts. Although much effort has been made regarding functionalization of these materials, multifunctionality and accurate positioning of functionalities with nanoscale precision still remain challenging. However, this precision is necessary to meet transport performance and complexity of natural pores in living systems, which are often based on nonequilibrium states and compartmentalization. In this work, a nanolocal functionalization and simultaneous localized sensing strategy inside a filtering mesoporous film using precisely placed plasmonic metal nanoparticles inside mesoporous films with pore accessibility control is demonstrated. A single layer of gold nanoparticles is incorporated into mesoporous thin films with precise spatial control along the nanoscale layer thickness. The local surface plasmon resonance is applied to induce a photopolymerization leading to a nanoscopic polymer shell around the particles and thus nanolocal polymer placement inside the mesoporous material. As near-field modes are sensitive to the dielectric properties of their surrounding, the in situ sensing capability is demonstrated using UV-vis spectroscopy. It is demonstrated that the sensing sensitivity only slightly decreases upon functionalization. The presented nanolocal placement of responsive functional polymers into nanopores offers a simultaneous filtering and nanoscopic readout function. Such a nanoscale local control is envisioned to have a strong impact onto the development of new transport and sensor concepts, especially as the system can be developed into higher complexity using different metal nanoparticles and additional design of mesoporous film filtering properties.
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Affiliation(s)
- Mathias Stanzel
- Ernst-Berl
Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Lucy Zhao
- Ernst-Berl
Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Reza Mohammadi
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, Cauerstraße 4, 91058 Erlangen, Germany
| | - Raheleh Pardehkhorram
- Ernst-Berl
Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
| | - Ulrike Kunz
- Department
of Materials and Earth Sciences, Physical Metallurgy Group, Technische Universität Darmstadt, Alarich-Weiss-Straße 2, 64287 Darmstadt, Germany
| | - Nicolas Vogel
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, Cauerstraße 4, 91058 Erlangen, Germany
| | - Annette Andrieu-Brunsen
- Ernst-Berl
Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt, Germany
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12
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Wang Z, Hsu C, Wang X. Topographical transition of submicron pillar array of azo molecular glass induced by circularly polarized light. Sci Rep 2021; 11:7327. [PMID: 33795776 PMCID: PMC8016868 DOI: 10.1038/s41598-021-86794-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 03/19/2021] [Indexed: 11/09/2022] Open
Abstract
The well-aligned submicron patterns on surfaces have attracted wide attention from scientific curiosity to practical applications. Understanding their formation and transition is highly desirable for efficient manufacture of the patterns for many usages. Here, we report a unique observation on self-organized topographical transition of submicron pillar array of an azo molecular glass, induced by irradiation with circularly polarized light. During gradual erasure of the patterns upon exposure to the light, which is a property of this material, a new set of pillars unexpectedly emerge with new one in middle of each triangle cell of the original array. The highly regular pillar array with triple area density is formed and finally stabilized in the process, as revealed by thorough investigation reported here. This unusual observation and its rationalization will be of benefit for deep understanding of the light–matter interaction and can be expected to be applied in different areas.
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Affiliation(s)
- Zenan Wang
- Department of Chemical Engineering, Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing, 100084, People's Republic of China
| | - Chungen Hsu
- Department of Chemical Engineering, Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing, 100084, People's Republic of China
| | - Xiaogong Wang
- Department of Chemical Engineering, Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing, 100084, People's Republic of China.
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13
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Huang H, Wang Z, Li X, Yang F, Su Y, Xu J, Wang X. Directional mass transfer of azo molecular glass microsphere induced by polarized light in aqueous immersion media. RSC Adv 2021; 11:15387-15399. [PMID: 35424066 PMCID: PMC8698237 DOI: 10.1039/d1ra01904j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Accepted: 04/16/2021] [Indexed: 12/16/2022] Open
Abstract
Photoinduced mass transfer of azo polymer and azo molecular glass has been intensively investigated under various light irradiation conditions simply using air as the ambient environment. In this work, in order to understand the effects of the surrounding medium on the light-induced process, azo molecular glass microspheres adhered on a substrate were immersed in water and different aqueous solutions, and their mass transfer behavior was investigated by irradiation with linearly polarized light. The microspheres in the aqueous media showed significant deformation through directional mass transfer upon light irradiation and transformed into a series of shape-anisotropic particles as revealed by microscopic observations. Compared with their counterparts upon light irradiation in air, the particles immersed in the aqueous media exhibited larger elongation parallel to the substrate and higher shape anisotropy. Optical simulation showed that this was caused by the alteration of the direction of the electric vibration of the refracted light at the medium–microsphere interface, which controlled the mass transfer behavior. On the other hand, the viscosity of the aqueous media showed no effect on the mass transfer process induced by the irradiation. The photo-thermal effect on the mass transfer behavior was ruled out as the thermal dissipation through a liquid is much more efficient than that through air. On the basis of this, this methodology was also successfully employed in the photo-fabrication of anisotropic submicron-sized periodic structures in aqueous medium. These observations can supply deep understanding of this fascinating process induced by polarized light and extend the scope of its applications. Directional mass transfer of azo molecular glass microspheres is comprehensively investigated upon polarized light irradiation in various aqueous immersion media, and the key factors to influence mass transfer and shape deformation are elucidated.![]()
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Affiliation(s)
- Hao Huang
- Department of Chemical Engineering
- Laboratory of Advanced Materials (MOE)
- Tsinghua University
- Beijing 100084
- People's Republic of China
| | - Zenan Wang
- Department of Chemical Engineering
- Laboratory of Advanced Materials (MOE)
- Tsinghua University
- Beijing 100084
- People's Republic of China
| | - Xu Li
- Department of Chemical Engineering
- Laboratory of Advanced Materials (MOE)
- Tsinghua University
- Beijing 100084
- People's Republic of China
| | - Fan Yang
- Department of Physics
- State Key Laboratory of Low Dimensional Quantum Physics
- Tsinghua University
- Beijing 100084
- People's Republic of China
| | - Yechao Su
- Department of Chemical Engineering
- The State Key Lab of Chemical Engineering
- Tsinghua University
- Beijing 100084
- People's Republic of China
| | - Jianhong Xu
- Department of Chemical Engineering
- The State Key Lab of Chemical Engineering
- Tsinghua University
- Beijing 100084
- People's Republic of China
| | - Xiaogong Wang
- Department of Chemical Engineering
- Laboratory of Advanced Materials (MOE)
- Tsinghua University
- Beijing 100084
- People's Republic of China
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14
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Surface Enhanced Raman Scattering on Regular Arrays of Gold Nanostructures: Impact of Long-Range Interactions and the Surrounding Medium. NANOMATERIALS 2020; 10:nano10112201. [PMID: 33158228 PMCID: PMC7694238 DOI: 10.3390/nano10112201] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 10/27/2020] [Accepted: 10/30/2020] [Indexed: 12/31/2022]
Abstract
Long-range interaction in regular metallic nanostructure arrays can provide the possibility to manipulate their optical properties, governed by the excitation of localized surface plasmon (LSP) resonances. When assembling the nanoparticles in an array, interactions between nanoparticles can result in a strong electromagnetic coupling for specific grating constants. Such a grating effect leads to narrow LSP peaks due to the emergence of new radiative orders in the plane of the substrate, and thus, an important improvement of the intensity of the local electric field. In this work, we report on the optical study of LSP modes supported by square arrays of gold nanodiscs deposited on an indium tin oxyde (ITO) coated glass substrate, and its impact on the surface enhanced Raman scattering (SERS) of a molecular adsorbate, the mercapto benzoic acid (4-MBA). We estimated the Raman gain of these molecules, by varying the grating constant and the refractive index of the surrounding medium of the superstrate, from an asymmetric medium (air) to a symmetric one (oil). We show that the Raman gain can be improved with one order of magnitude in a symmetric medium compared to SERS experiments in air, by considering the appropriate grating constant. Our experimental results are supported by FDTD calculations, and confirm the importance of the grating effect in the design of SERS substrates.
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15
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Yue X, Liu X, Yan N, Jiang W. Self-assembly of gold nanocubes into three-dimensional hollow colloidosomes and two-dimensional superlattices. Chem Commun (Camb) 2020; 56:12737-12740. [PMID: 32966383 DOI: 10.1039/d0cc05163b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Self-assembly of metal nanocubes (NCs) into periodic structures has applications in the fabrication of functional materials. Here, we propose a facile yet robust strategy for the fabrication of three-dimensional (3D) hollow colloidosomes and two-dimensional (2D) superlattices with highly ordered face-to-face configuration of gold NCs (AuNCs) via the hierarchical assembly of polymer-tethered AuNCs at the emulsion interface, providing a universal route for the preparation of hierarchical NC superstructures with applications in various fields.
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Affiliation(s)
- Xuan Yue
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China. and University of Science and Technology of China, Hefei 230026, China
| | - Xuejie Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China. and University of Science and Technology of China, Hefei 230026, China
| | - Nan Yan
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.
| | - Wei Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China. and University of Science and Technology of China, Hefei 230026, China
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16
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Xia J, Tang J, Bao F, Sun Y, Fang M, Cao G, Evans J, He S. Turning a hot spot into a cold spot: polarization-controlled Fano-shaped local-field responses probed by a quantum dot. LIGHT, SCIENCE & APPLICATIONS 2020; 9:166. [PMID: 33024554 PMCID: PMC7505841 DOI: 10.1038/s41377-020-00398-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 08/13/2020] [Accepted: 09/01/2020] [Indexed: 06/07/2023]
Abstract
Optical nanoantennas can convert propagating light to local fields. The local-field responses can be engineered to exhibit nontrivial features in spatial, spectral and temporal domains, where local-field interferences play a key role. Here, we design nearly fully controllable local-field interferences in the nanogap of a nanoantenna, and experimentally demonstrate that in the nanogap, the spectral dispersion of the local-field response can exhibit tuneable Fano lineshapes with nearly vanishing Fano dips. A single quantum dot is precisely positioned in the nanogap to probe the spectral dispersions of the local-field responses. By controlling the excitation polarization, the asymmetry parameter q of the probed Fano lineshapes can be tuned from negative to positive values, and correspondingly, the Fano dips can be tuned across a broad spectral range. Notably, at the Fano dips, the local-field intensity is strongly suppressed by up to ~50-fold, implying that the hot spot in the nanogap can be turned into a cold spot. The results may inspire diverse designs of local-field responses with novel spatial distributions, spectral dispersions and temporal dynamics, and expand the available toolbox for nanoscopy, spectroscopy, nano-optical quantum control and nanolithography.
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Affiliation(s)
- Juan Xia
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, National Engineering Research Center for Optical Instrumentation, JORCEP, College of Optical Science and Engineering, Zhejiang University, 310058 Hangzhou, China
| | - Jianwei Tang
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, National Engineering Research Center for Optical Instrumentation, JORCEP, College of Optical Science and Engineering, Zhejiang University, 310058 Hangzhou, China
- School of Physics, Huazhong University of Science and Technology, 430074 Wuhan, China
| | - Fanglin Bao
- Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Center of Photonics, South China Academy of Advanced Optoelectronics, South China Normal University, 510006 Guangzhou, China
| | - Yongcheng Sun
- Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Center of Photonics, South China Academy of Advanced Optoelectronics, South China Normal University, 510006 Guangzhou, China
| | - Maodong Fang
- Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Center of Photonics, South China Academy of Advanced Optoelectronics, South China Normal University, 510006 Guangzhou, China
| | - Guanjun Cao
- Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Center of Photonics, South China Academy of Advanced Optoelectronics, South China Normal University, 510006 Guangzhou, China
| | - Julian Evans
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, National Engineering Research Center for Optical Instrumentation, JORCEP, College of Optical Science and Engineering, Zhejiang University, 310058 Hangzhou, China
| | - Sailing He
- Centre for Optical and Electromagnetic Research, State Key Laboratory of Modern Optical Instrumentation, National Engineering Research Center for Optical Instrumentation, JORCEP, College of Optical Science and Engineering, Zhejiang University, 310058 Hangzhou, China
- Centre for Optical and Electromagnetic Research, ZJU-SCNU Joint Center of Photonics, South China Academy of Advanced Optoelectronics, South China Normal University, 510006 Guangzhou, China
- Department of Electromagnetic Engineering, School of Electrical Engineering, Royal Institute of Technology, S-100 44 Stockholm, Sweden
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17
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Palombo Blascetta N, Lombardi P, Toninelli C, van Hulst NF. Cold and Hot Spots: From Inhibition to Enhancement by Nanoscale Phase Tuning of Optical Nanoantennas. NANO LETTERS 2020; 20:6756-6762. [PMID: 32804516 DOI: 10.1021/acs.nanolett.0c02607] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Optical nanoantennas are well-known for the confinement of light into nanoscale hot spots, suitable for emission enhancement and sensing applications. Here, we show how control of the antenna dimensions allows tuning the local optical phase, hence turning a hot spot into a cold spot. We manipulate the local intensity exploiting the interference between driving and scattered field. Using single molecules as local detectors, we experimentally show the creation of subwavelength pockets with full suppression of the driving field. Remarkably, together with the cold excitation spots, we observe inhibition of emission by the phase-tuned nanoantenna. The fluorescence lifetime of a molecule scanned in such volumes becomes longer, showing slow down of spontaneous decay. In conclusion, the spatial phase of a nanoantenna is a powerful knob to tune between enhancement and inhibition in a 3-dimensional subwavelength volume.
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Affiliation(s)
- Nicola Palombo Blascetta
- ICFO, Institut de Ciences Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona 08860, Spain
| | - Pietro Lombardi
- CNR-INO and LENS, European Laboratory for Non-Linear Spectroscopy, Via Nello Carrara 1, Sesto Fiorentino, 50019 Firenze, Italy
| | - Costanza Toninelli
- CNR-INO and LENS, European Laboratory for Non-Linear Spectroscopy, Via Nello Carrara 1, Sesto Fiorentino, 50019 Firenze, Italy
| | - Niek F van Hulst
- ICFO, Institut de Ciences Fotoniques, The Barcelona Institute of Science and Technology, Castelldefels, Barcelona 08860, Spain
- ICREA, Institució Catalana de Recerca i Estudis Avançats, Barcelona 08010, Spain
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18
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Park JE, Lee Y, Nam JM. Precisely Shaped, Uniformly Formed Gold Nanocubes with Ultrahigh Reproducibility in Single-Particle Scattering and Surface-Enhanced Raman Scattering. NANO LETTERS 2018; 18:6475-6482. [PMID: 30153413 DOI: 10.1021/acs.nanolett.8b02973] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Synthesizing plasmonic nanostructures in an ultraprecise manner is of paramount importance because the nanometer-scale structural details can significantly affect their plasmonic properties. Au nanocubes (AuNCs) have been a highly promising, heavily studied nanostructure with high potential in various fields, but an ultraprecise synthesis from 10 to 100 nm in size over a large number of AuNCs has not been well established. Precisely structured AuNC-based studies for a highly reproducible, quantitative plasmonic signal generation [e.g., quantitative surface-enhanced Raman scattering (SERS)] are needed for reliable use and exploration in the beneficial properties of AuNCs. Here, we developed a strategy for AuNC synthesis with the desired size and shape, ranging from 17 to 78 nm particularly with highly controlled corner sharpness, by precisely controlling the growth rate of different facets and AuNC-specific flocculation which enabled ultrahigh yields (∼98-99%). Importantly, the precisely shaped AuNCs can scatter light in a spectrally reproducible manner, and the SERS enhancement factors (EFs) for the AuNC dimers are very narrowly distributed (the EFs of 72 nm sharp-cornered cube dimers have a distribution within 1 order of magnitude). Our results pave the paths to ultrahigh yield synthesis of metal nanocubes with a precise size and shape and offer single-particle-level spectral controllability and reproducibility over a large number of particles.
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Affiliation(s)
- Jeong-Eun Park
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
| | - Yeonhee Lee
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
| | - Jwa-Min Nam
- Department of Chemistry , Seoul National University , Seoul 08826 , South Korea
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19
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Kim M, Huh JH, Lee J, Woo HJ, Kim K, Jung DW, Yi GR, Jeong MS, Lee S, Song YJ. Photofluidic Near-Field Mapping of Electric-Field Resonance in Plasmonic Metasurface Assembled with Gold Nanoparticles. J Phys Chem Lett 2017; 8:3745-3751. [PMID: 28749678 DOI: 10.1021/acs.jpclett.7b01307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We present a near-field mapping of electric fields from the individual superspherical and ultrasmooth gold nanoparticles (AuNPs) and artificially assembled AuNP nanostructures by measuring the reconfiguration of an azobenzene-containing polymer(azo-polymer) film. Various configurations of AuNPs and the azo-polymer were studied with atomic force microscopy measurements and calculations. The interference was systematically studied with AuNP dimers of various gap distances and different embedding depth in the polymer film. Finally, we successfully demonstrated the interference of standing waves in artificially assembled plasmonic metasurface.
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Affiliation(s)
- Minwoo Kim
- SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
| | - Ji-Hyeok Huh
- SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
| | - Joohyun Lee
- SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
| | - Hwi Je Woo
- SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
| | - Kwangjin Kim
- SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
| | - Dae-Woong Jung
- School of Chemical Engineering, Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
| | - Gi-Ra Yi
- School of Chemical Engineering, Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
| | - Mun Seok Jeong
- Department of Energy Science, Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS) , Suwon 16419, Republic of Korea
| | - Seungwoo Lee
- SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
- School of Nano Engineering, Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
| | - Young Jae Song
- SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
- Center for Integrated Nanostructure Physics (CINAP), Institute for Basic Science (IBS) , Suwon 16419, Republic of Korea
- School of Nano Engineering, Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
- Department of Physics, Sungkyunkwan University (SKKU) , Suwon 16419, Republic of Korea
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20
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Pellarin M, Ramade J, Rye JM, Bonnet C, Broyer M, Lebeault MA, Lermé J, Marguet S, Navarro JRG, Cottancin E. Fano Transparency in Rounded Nanocube Dimers Induced by Gap Plasmon Coupling. ACS NANO 2016; 10:11266-11279. [PMID: 28024347 DOI: 10.1021/acsnano.6b06406] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Homodimers of noble metal nanocubes form model plasmonic systems where the localized plasmon resonances sustained by each particle not only hybridize but also coexist with excitations of a different nature: surface plasmon polaritons confined within the Fabry-Perot cavity delimited by facing cube surfaces (i.e., gap plasmons). Destructive interference in the strong coupling between one of these highly localized modes and the highly radiating longitudinal dipolar plasmon of the dimer is responsible for the formation of a Fano resonance profile and the opening of a spectral window of anomalous transparency for the exciting light. We report on the clear experimental evidence of this effect in the case of 50 nm silver and 160 nm gold nanocube dimers studied by spatial modulation spectroscopy at the single particle level. A numerical study based on a plasmon mode analysis leads us to unambiguously identify the main cavity mode involved in this process and especially the major role played by its symmetry. The Fano depletion dip is red-shifted when the gap size is decreasing. It is also blue-shifted and all the more pronounced that the cube edge rounding is large. Combining nanopatch antenna and plasmon hybridization descriptions, we quantify the key role of the face-to-face distance and the cube edge morphology on the spectral profile of the transparency dip.
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Affiliation(s)
- Michel Pellarin
- Univ Lyon, Université Claude Bernard Lyon , CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Julien Ramade
- Univ Lyon, Université Claude Bernard Lyon , CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Jan Michael Rye
- Univ Lyon, Université Claude Bernard Lyon , CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Christophe Bonnet
- Univ Lyon, Université Claude Bernard Lyon , CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Michel Broyer
- Univ Lyon, Université Claude Bernard Lyon , CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Marie-Ange Lebeault
- Univ Lyon, Université Claude Bernard Lyon , CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Jean Lermé
- Univ Lyon, Université Claude Bernard Lyon , CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - Sylvie Marguet
- NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay , 91191 Gif-sur-Yvette, France
| | - Julien R G Navarro
- Fiber and Polymer Technology, Royal Institute of Technology (KTH) , Teknikringen 56, SE-100 44 Stockholm, Sweden
| | - Emmanuel Cottancin
- Univ Lyon, Université Claude Bernard Lyon , CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
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21
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Zito G, Rusciano G, Sasso A. Dark spots along slowly scaling chains of plasmonic nanoparticles. OPTICS EXPRESS 2016; 24:13584-13589. [PMID: 27410374 DOI: 10.1364/oe.24.013584] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We numerically investigate the optical response of slowly scaling linear chains of mismatched silver nanoparticles. Hybridized plasmon chain resonances manifest unusual local field distributions around the nanoparticles that result from symmetry breaking of the geometry. Importantly, we find localization patterns characterized by bright hot-spots alternated by what we term dark spots. A dark spot is associated to dark plasmons that have collinear and antiparallel dipole moments along the chain. As a result, the field amplification in the dark interjunction gap is extinguished for incident polarization parallel to the chain axis. Despite the strong plasmonic coupling, the nanoparticles on the sides of this dark gap experience a dramatic asymmetric field amplification with amplitude gain contrast > 2×102. Remarkably, also for polarization orthogonal to the axis, gap hot-spots form on resonance.
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22
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Nguyen M, Lamouri A, Salameh C, Lévi G, Grand J, Boubekeur-Lecaque L, Mangeney C, Félidj N. Plasmon-mediated chemical surface functionalization at the nanoscale. NANOSCALE 2016; 8:8633-40. [PMID: 27049296 DOI: 10.1039/c6nr00744a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Controlling the surface grafting of species at the nanoscale remains a major challenge, likely to generate many opportunities in materials science. In this work, we propose an original strategy for chemical surface functionalization at the nanoscale, taking advantage of localized surface plasmon (LSP) excitation. The surface functionalization is demonstrated through aryl film grafting (derived from a diazonium salt), covalently bonded at the surface of gold lithographic nanostripes. The aryl film is specifically grafted in areas of maximum near field enhancement, as confirmed by numerical calculation based on the discrete dipole approximation method. The energy of the incident light and the LSP wavelength are shown to be crucial parameters to monitor the aryl film thickness of up to ∼30 nm. This robust and versatile strategy opens up exciting prospects for the nanoscale confinement of functional layers on surfaces, which should be particularly interesting for molecular sensing or nanooptics.
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Affiliation(s)
- Mai Nguyen
- Interfaces, Traitements, Organisation et Dynamique des Systèmes, Université Paris Diderot, Sorbonne Paris Cité, CNRS UMR 7086, 15 rue Jean-Antoine de Baïf, 75205 Paris Cedex 13, France.
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23
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Zhou X, Wenger J, Viscomi FN, Le Cunff L, Béal J, Kochtcheev S, Yang X, Wiederrecht GP, Colas des Francs G, Bisht AS, Jradi S, Caputo R, Demir HV, Schaller RD, Plain J, Vial A, Sun XW, Bachelot R. Two-Color Single Hybrid Plasmonic Nanoemitters with Real Time Switchable Dominant Emission Wavelength. NANO LETTERS 2015; 15:7458-66. [PMID: 26437118 DOI: 10.1021/acs.nanolett.5b02962] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We demonstrate two-color nanoemitters that enable the selection of the dominant emitting wavelength by varying the polarization of excitation light. The nanoemitters were fabricated via surface plasmon-triggered two-photon polymerization. By using two polymerizable solutions with different quantum dots, emitters of different colors can be positioned selectively in different orientations in the close vicinity of the metal nanoparticles. The dominant emission wavelength of the metal/polymer anisotropic hybrid nanoemitter thus can be selected by altering the incident polarization.
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Affiliation(s)
- Xuan Zhou
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Jérémie Wenger
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Francesco N Viscomi
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
- Department of Physics & CNR-NANOTEC University of Calabria , I-87036 Rende, Cosenza, Italy
| | - Loïc Le Cunff
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Jérémie Béal
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Serguei Kochtcheev
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Xuyong Yang
- School of Electrical and Electronic Engineering, Nanyang Technological University , Nanyang Avenue, Singapore 639798
| | - Gary P Wiederrecht
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
| | - Gérard Colas des Francs
- Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB); UMR 6303 CNRS, Université de Bourgogne , Franche-Comté, 9 avenue Alain Savary BP 47870, F-2178 Dijon Cedex, France
| | - Anu Singh Bisht
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Safi Jradi
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Roberto Caputo
- Department of Physics & CNR-NANOTEC University of Calabria , I-87036 Rende, Cosenza, Italy
| | - Hilmi Volkan Demir
- School of Electrical and Electronic Engineering, Nanyang Technological University , Nanyang Avenue, Singapore 639798
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
| | - Jérôme Plain
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Alexandre Vial
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
| | - Xiao Wei Sun
- School of Electrical and Electronic Engineering, Nanyang Technological University , Nanyang Avenue, Singapore 639798
| | - Renaud Bachelot
- Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, CNRS UMR 6281, Université de Technologie de Troyes , 12 Rue Marie Curie CS42060, 10004 Troyes Cedex, France
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Vapaavuori J, Laventure A, Bazuin CG, Lebel O, Pellerin C. Submolecular Plasticization Induced by Photons in Azobenzene Materials. J Am Chem Soc 2015; 137:13510-7. [PMID: 26439981 DOI: 10.1021/jacs.5b06611] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate experimentally for the first time that the illumination of azobenzene derivatives leads to changes in molecular environment similar to those observed on heating but that are highly heterogeneous at the submolecular scale. This localized photoplasticization, which can be associated with a free volume gradient, helps to understand the puzzling phenomenon of photoinduced macroscopic material flow and photoexpansion upon illumination far below the glass transition temperature (T(g)). The findings stem from the correlation of infrared (IR) spectral band shifts measured upon illumination with those measured at controlled temperatures for two amorphous DR1-functionalized azo derivatives, a polymer, pDR1A, and a molecular glass, gDR1. This new approach reveals that IR spectroscopy can be used as an efficient label-free molecular-scale thermometer that allows the assignment of an effective temperature (T(eff)) to each moiety in these compounds when irradiated. While no band shift is observed upon illumination for the vibrational modes assigned to backbone moieties of pDR1A and gDR1 and a small band shift is found for the spacer moiety, dramatic band shifts are recorded for the azo moiety, corresponding to an increase in T(eff) of up to nearly 200 °C and a molecular environment that is equivalent to thermal heating well above the bulk T(g) of the material. An irradiated azo-containing material thus combines characteristic properties of amorphous materials both below and above its bulk T(g). The direct measurement of T(eff) is a powerful probe of the local environment at the submolecular scale, paving the way toward better rationalization of photoexpansion and the athermal malleability of azo-containing materials upon illumination below their T(g).
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Affiliation(s)
- Jaana Vapaavuori
- Département de chimie, Centre de recherche sur les matériaux auto-assemblés (CRMAA/CSACS), Université de Montréal , Montréal, QC H3C 3J7, Canada
| | - Audrey Laventure
- Département de chimie, Centre de recherche sur les matériaux auto-assemblés (CRMAA/CSACS), Université de Montréal , Montréal, QC H3C 3J7, Canada
| | - C Geraldine Bazuin
- Département de chimie, Centre de recherche sur les matériaux auto-assemblés (CRMAA/CSACS), Université de Montréal , Montréal, QC H3C 3J7, Canada
| | - Olivier Lebel
- Department of Chemistry and Chemical Engineering, Royal Military College of Canada , Kingston, ON Canada , K7K 7B4
| | - Christian Pellerin
- Département de chimie, Centre de recherche sur les matériaux auto-assemblés (CRMAA/CSACS), Université de Montréal , Montréal, QC H3C 3J7, Canada
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Ledin PA, Russell M, Geldmeier JA, Tkachenko IM, Mahmoud MA, Shevchenko V, El-Sayed MA, Tsukruk VV. Light-responsive plasmonic arrays consisting of silver nanocubes and a photoisomerizable matrix. ACS APPLIED MATERIALS & INTERFACES 2015; 7:4902-4912. [PMID: 25671557 DOI: 10.1021/am508993z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report on the synthesis of novel branched organic-inorganic azo-polyhedral oligomeric silsesquioxane (POSS) conjugates (Azo-POSS) and their use as a stable active medium to induce reversible plasmonic modulations of embedded metal nanostructures. A dense monolayer of silver nanocubes was deposited on a quartz substrate using the Langmuir-Blodgett technique and subsequently coated with an ultrathin Azo-POSS layer. The reversible light-induced photoisomerization between the trans and cis states of the azobenzene-terminated branched POSS material results in significant changes in the refractive index (up to 0.17) at a wavelength of 380 nm. We observed that the pronounced and reversible change in the surrounding refractive index results in a corresponding hypsochromic plasmonic shift of 6 nm in the plasmonic band of the embedded silver nanocubes. The reversible tuning of the plasmonic modes of noble-metal nanostructures using a variable-refractive-index medium opens up the possibility of fabricating photoactive, hybrid, ultrathin coatings with robust, real-time, photoinitiated responses for prospective applications in photoactive materials that can be reversibly tuned by light illumination.
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Affiliation(s)
- Petr A Ledin
- School of Materials Science and Engineering and §Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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Dodson SL, Cao C, Zaribafzadeh H, Li S, Xiong Q. Engineering plasmonic nanorod arrays for colon cancer marker detection. Biosens Bioelectron 2015; 63:472-477. [DOI: 10.1016/j.bios.2014.07.083] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 07/28/2014] [Accepted: 07/30/2014] [Indexed: 11/17/2022]
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Bai Y, Butburee T, Yu H, Li Z, Amal R, Lu GQM, Wang L. Controllable synthesis of concave cubic gold core-shell nanoparticles for plasmon-enhanced photon harvesting. J Colloid Interface Sci 2014; 449:246-51. [PMID: 25498878 DOI: 10.1016/j.jcis.2014.11.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 11/17/2014] [Indexed: 11/24/2022]
Abstract
Well-defined core-shell nanoparticles (NPs) containing concave cubic Au cores and TiO2 shells (CA@T) were synthesized in colloidal suspension. These CA@T NPs exhibit Localized Surface Plasmon Resonance (LSPR) absorption in the NIR region, which provides a unique property for utilizing the low energy range of the solar spectrum. In order to evaluate the plasmonic enhancement effect, a variety of CA@T NPs were incorporated into working electrodes of dye-sensitized solar cells (DSSCs). By adjusting the shell thickness of CA@T NPs, the plasmonic property can be tuned to achieve maximum photovoltaic improvement. Furthermore, the DSSC cells fabricated with the CA@T NPs exhibit a remarkably plasmonic assisted conversion efficiency enhancement (23.3%), compared to that (14.8%) of the reference cells assembled with spherical Au@TiO2 core-shell (SA@T) NPs under similar conditions. Various characterizations reveal that this performance improvement is attributed to the much stronger electromagnetic field generated at the hot spots of CA@T NPs, resulting in significantly higher light harvesting and more efficient charge separation. This study also provides new insights into maximizing the plasmonic enhancement, offering great potential in other applications including light-matter interaction, photocatalytic energy conversion and new-generation solar cells.
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Affiliation(s)
- Yang Bai
- Nanomaterials Centre, School of Chemical Engineering and AIBN, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Teera Butburee
- Nanomaterials Centre, School of Chemical Engineering and AIBN, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Hua Yu
- Nanomaterials Centre, School of Chemical Engineering and AIBN, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Zhen Li
- Institute of Superconducting and Electronic Materials, Australian Institute of Innovative Materials, The University of Wollongong, North Wollongong, NSW 2500, Australia
| | - Rose Amal
- School of Chemical Engineering, The University of New South Wales, Sydney, NSW 2052, Australia
| | - G Q Max Lu
- Nanomaterials Centre, School of Chemical Engineering and AIBN, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Lianzhou Wang
- Nanomaterials Centre, School of Chemical Engineering and AIBN, The University of Queensland, Brisbane, QLD 4072, Australia.
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28
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Erwin WR, Coppola A, Zarick HF, Arora P, Miller KJ, Bardhan R. Plasmon enhanced water splitting mediated by hybrid bimetallic Au-Ag core-shell nanostructures. NANOSCALE 2014; 6:12626-34. [PMID: 25188374 DOI: 10.1039/c4nr03625e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
In this work, we employed wet chemically synthesized bimetallic Au-Ag core-shell nanostructures (Au-AgNSs) to enhance the photocurrent density of mesoporous TiO2 for water splitting and we compared the results with monometallic Au nanoparticles (AuNPs). While Au-AgNSs incorporated photoanodes give rise to 14× enhancement in incident photon to charge carrier efficiency, AuNPs embedded photoanodes result in 6× enhancement. By varying nanoparticle concentration in the photoanodes, we observed ∼245× less Au-AgNSs are required relative to AuNPs to generate similar photocurrent enhancement for solar fuel conversion. Power-dependent measurements of Au-AgNSs and AuNPs showed a first order dependence to incident light intensity, relative to half-order dependence for TiO2 only photoanodes. This indicated that plasmonic nanostructures enhance charge carriers formed on the surface of the TiO2 which effectively participate in photochemical reactions. Our experiments and simulations suggest the enhanced near-field, far-field, and multipolar resonances of Au-AgNSs facilitating broadband absorption of solar radiation collectively gives rise to their superior performance in water splitting.
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Affiliation(s)
- William R Erwin
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA.
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Zhang J, Cao C, Xu X, Liow C, Li S, Tan P, Xiong Q. Tailoring alphabetical metamaterials in optical frequency: plasmonic coupling, dispersion, and sensing. ACS NANO 2014; 8:3796-3806. [PMID: 24670107 DOI: 10.1021/nn500527f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Tailoring optical properties of artificial metamaterials, whose optical properties go beyond the limitations of conventional and naturally occurring materials, is of importance in fundamental research and has led to many important applications such as security imaging, invisible cloak, negative refraction, ultrasensitive sensing, and transformable and switchable optics. Herein, by precisely controlling the size, symmetry, and topology of alphabetical metamaterials with U, S, Y, H, U-bar, and V shapes, we have obtained highly tunable optical response covering visible-to-infrared (vis-NIR) optical frequency. In addition, we show a detailed study on the physical origin of resonance modes, plasmonic coupling, the dispersion of resonance modes, and the possibility of negative refraction. We have found that all the electronic and magnetic modes follow the dispersion of surface plasmon polaritons; thus, essentially they are electronic- and magnetic-surface-plasmon-polaritons-like (ESPP-like and MSPP-like) modes resulted from diffraction coupling between localized surface plasmon and freely propagating light. On the basis of the fill factor and formula of magnetism permeability, we predict that the alphabetical metamaterials should show the negative refraction capability in visible optical frequency. Furthermore, we have demonstrated the specific ultrasensitive surface enhanced Raman spectroscopy (SERS) sensing of monolayer molecules and femtomolar food contaminants by tuning their resonance to match the laser wavelength, or by tuning the laser wavelength to match the plasmon resonance of metamaterials. Our tunable alphabetical metamaterials provide a generic platform to study the electromagnetic properties of metamaterials and explore the novel applications in optical frequency.
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Affiliation(s)
- Jun Zhang
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371
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Liu XL, Liang S, Nan F, Pan YY, Shi JJ, Zhou L, Jia SF, Wang JB, Yu XF, Wang QQ. Stepwise synthesis of cubic Au-AgCdS core-shell nanostructures with tunable plasmon resonances and fluorescence. OPTICS EXPRESS 2013; 21:24793-24798. [PMID: 24150322 DOI: 10.1364/oe.21.024793] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Cubic Au-AgCdS core-shell nanostructures were synthesized through cation exchange method assisted by tributylphosphine (TBP) as a phase-transfer agent. Among intermediate products, Au-Ag core-shell nanocubes exhibited many high-order plasmon resonance modes related to the special cubic shape, and these plasmon bands red-shifted along with the increasing of particle size. The plasmon band of Au core first red-shifted and broadened at the step of Au-Ag₂S and then blue-shifted and narrowed at the step of Au-AgCdS. Since TBP was very crucial for the efficient conversion from Ag₂S to CdS, we found that both absorption and fluorescence of the final products could be controlled by TBP.
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Priimagi A, Shevchenko A. Azopolymer-based micro- and nanopatterning for photonic applications. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/polb.23390] [Citation(s) in RCA: 218] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Arri Priimagi
- Department of Applied Physics; Aalto University; Aalto FI-00076 Finland
| | - Andriy Shevchenko
- Department of Applied Physics; Aalto University; Aalto FI-00076 Finland
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Dodson S, Haggui M, Bachelot R, Plain J, Li S, Xiong Q. Optimizing Electromagnetic Hotspots in Plasmonic Bowtie Nanoantennae. J Phys Chem Lett 2013; 4:496-501. [PMID: 26281746 DOI: 10.1021/jz302018x] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Sensitivity is a key factor in the improvement of nanoparticle-based biosensors. Bowtie nanoantennae have shown high sensitivity for both surface-enhanced Raman scattering (SERS)- and localized surface plasmon resonance (LSPR)-based biosensing. In this work, optical bowtie nanoantennae with varying geometries were simulated, fabricated, and characterized. We successfully fabricated sub-5 nm gaps between prisms. The gap between prisms, the prism size, and the radius of curvature of the prism corners were characterized for their effects on the optical and electromagnetic properties. Bowties were characterized using LSPR, SERS, and photochemical near-field imaging. The results indicate that the radius of curvature of the prism corners has an important effect on the SERS abilities of a nanoparticle array. The trends described herein can be utilized to intelligently design highly sensitive SERS and LSPR biosensing substrates.
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Affiliation(s)
- Stephanie Dodson
- †Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
| | - Mohamed Haggui
- ‡Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, Université de Technologie de Troyes, France
| | - Renaud Bachelot
- ‡Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, Université de Technologie de Troyes, France
| | - Jérôme Plain
- ‡Laboratoire de Nanotechnologie et d'Instrumentation Optique, ICD, Université de Technologie de Troyes, France
| | | | - Qihua Xiong
- †Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371
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Zheng YB, Pathem BK, Hohman JN, Thomas JC, Kim M, Weiss PS. Photoresponsive molecules in well-defined nanoscale environments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:302-312. [PMID: 22933316 DOI: 10.1002/adma.201201532] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 07/01/2012] [Indexed: 06/01/2023]
Abstract
Stimuli-responsive molecules are key building blocks of functional molecular materials and devices. These molecules can operate in a range of environments. A molecule's local environment will dictate its conformation, reactivity, and function; by controlling the local environment we can ultimately develop interfaces of individual molecules with the macroscopic environment. By isolating molecules in well-defined environments, we are able to obtain both accurate measurements and precise control. We exploit defect sites in self-assembled monolayers (SAMs) to direct the functional molecules into precise locations, providing a basis for the measurements and engineering of functional molecular systems. The structure and functional moieties of the SAM can be tuned to control not only the intermolecular interactions but also molecule-substrate interactions, resulting in extraction or control of desired molecular functions. Herein, we report our progress toward the assembly and measurements of photoresponsive molecules and their precise assemblies in SAM matrices.
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Affiliation(s)
- Yue Bing Zheng
- California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA
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Sancho-Parramon J, Bosch S. Dark modes and Fano resonances in plasmonic clusters excited by cylindrical vector beams. ACS NANO 2012; 6:8415-8423. [PMID: 22920735 DOI: 10.1021/nn303243p] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Control of the polarization distribution of light allows tailoring the electromagnetic response of plasmonic particles. By rigorously extending the generalized multiparticle Mie theory, we show that focused cylindrical vector beams (CVB) can be used to efficiently excite dark plasmon modes in nanoparticle clusters. In addition to the small radiative damping and large field enhancement associated to dark modes, excitation with CVB can give place to unusual phenomenology like the formation of electromagnetic cold spots and the generation of Fano resonances in highly symmetric clusters. Overall, the results show the potential of CVB to tailor the plasmonic response of nanoparticle clusters in a unique way.
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Affiliation(s)
- Jordi Sancho-Parramon
- Departament de Física Aplicada i Òptica, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain.
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