1
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Vernier C, Saviot L, Fan Y, Courty A, Portalès H. Sensitivity of Localized Surface Plasmon Resonance and Acoustic Vibrations to Edge Rounding in Silver Nanocubes. ACS NANO 2023; 17:20462-20472. [PMID: 37812521 DOI: 10.1021/acsnano.3c06990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
Precise knowledge of the dependence of nano-object properties on their structural characteristics such as their size, shape, composition, or crystallinity, in turn, enables them to be finely characterized using appropriate techniques. Spectrophotometry and inelastic light scattering spectroscopy are noninvasive techniques that are proving highly robust and efficient for characterizing the optical response and vibrational properties of metal nano-objects. Here, we investigate the optical and vibrational properties of monodomain silver nanocubes synthesized by the chemical route, with edge length ranging from around 20 to 58 nm. The synthesized nanocrystals are not perfectly cubic and exhibit rounded edges and corners. This rounding was quantitatively taken into account by assimilating the shape of the nanocubes to superellipsoids. The effect of rounding on their optical response was clearly evidenced by localized surface plasmon resonance spectroscopy and supported by calculations based on the discrete dipole approximation method. The study of their acoustic vibrations by high-resolution low-frequency Raman scattering revealed a substructure of the T2g band, which was analyzed as a function of rounding. The measured frequencies are consistent with the existence of an anticrossing pattern of the two T2g branches. Such an avoided crossing in the T2g modes is clearly evidenced by calculating the vibrational frequencies of silver nanocubes using the Rayleigh-Ritz variational method that accounts for both their real size, shape, and cubic elasticity. These results show that it is possible to assess the rounding of nanocubes, including by means of ensemble spectroscopic measurements on well-calibrated particles.
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Affiliation(s)
- Charles Vernier
- Sorbonne Université, CNRS, MONARIS, UMR 8233, Paris 75005, France
| | - Lucien Saviot
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR 6303 CNRS, Université Bourgogne Franche-Comté, Dijon CEDEX 21078, France
| | - Yinan Fan
- Sorbonne Université, CNRS, MONARIS, UMR 8233, Paris 75005, France
| | - Alexa Courty
- Sorbonne Université, CNRS, MONARIS, UMR 8233, Paris 75005, France
| | - Hervé Portalès
- Sorbonne Université, CNRS, MONARIS, UMR 8233, Paris 75005, France
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2
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Jansen M, Tisdale WA, Wood V. Nanocrystal phononics. NATURE MATERIALS 2023; 22:161-169. [PMID: 36702886 DOI: 10.1038/s41563-022-01438-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 11/14/2022] [Indexed: 06/18/2023]
Abstract
Colloidal nanocrystals are successfully used as nanoscale building blocks for creating hierarchical solids with structures that range from amorphous networks to sophisticated periodic superlattices. Recently, it has been observed that these superlattices exhibit collective vibrations, which stem from the correlated motion of the nanocrystals, with their surface-bound ligands acting as molecular linkers. In this Perspective, we describe the work so far on collective vibrations in nanocrystal solids and their as-of-yet untapped potential for phononic applications. With the ability to engineer vibrations in the hypersonic regime through the choice of nanocrystal and linker composition, as well as by controlling their size, shape and chemical interactions, such superstructures offer new opportunities for phononic crystals, acoustic metamaterials and optomechanical systems.
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Affiliation(s)
- Maximilian Jansen
- Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, Switzerland
| | - William A Tisdale
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Vanessa Wood
- Department of Information Technology and Electrical Engineering, ETH Zurich, Zurich, Switzerland.
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3
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Xin W, Huang J, Chen Q, Sun Y, Chen H, Liu X. Study of Nanoparticle-Polymer Interactions via the Mechanical Stretching of Surface-Enhanced Raman Scattering Substrates. Macromol Rapid Commun 2023; 44:e2200541. [PMID: 36057795 DOI: 10.1002/marc.202200541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/04/2022] [Indexed: 01/26/2023]
Abstract
It is shown that the aligned electrospun fibers are a convenient platform for studying the mechanical effects on nanomaterials, particularly when using surface-enhanced Raman scattering as a sensitive tool of monitoring. The ligands on the surface of the embedded Au nanoparticles fall off easily with the shear force from the stretching, in contrast to the counterparts protected by polymer/silica shells. Upon stretching, the chains of Au nanoparticles will reversibly break, as revealed by the dramatic changes in the longitudinal plasmon absorption. It is believed that such a platform will open a window for understanding mechanical effects at the nanoscale, and also a new means for synthetic control.
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Affiliation(s)
- Wenwen Xin
- Institute of Advanced Synthesis and School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu, 211816, P. R. China
| | - Jie Huang
- Institute of Advanced Synthesis and School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu, 211816, P. R. China
| | - Qiuxian Chen
- Institute of Advanced Synthesis and School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu, 211816, P. R. China
| | - Yiwei Sun
- Institute of Advanced Synthesis and School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu, 211816, P. R. China
| | - Hongyu Chen
- School of Science, Westlake University, Hangzhou, 310023, P. R. China
| | - Xueyang Liu
- Institute of Advanced Synthesis and School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, Jiangsu, 211816, P. R. China
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4
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Vasileiadis T, Noual A, Wang Y, Graczykowski B, Djafari-Rouhani B, Yang S, Fytas G. Optomechanical Hot-Spots in Metallic Nanorod-Polymer Nanocomposites. ACS NANO 2022; 16:20419-20429. [PMID: 36475620 PMCID: PMC9798866 DOI: 10.1021/acsnano.2c06673] [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: 07/06/2022] [Accepted: 11/28/2022] [Indexed: 06/17/2023]
Abstract
Plasmonic coupling between adjacent metallic nanoparticles can be exploited for acousto-plasmonics, single-molecule sensing, and photochemistry. Light absorption or electron probes can be used to study plasmons and their interactions, but their use is challenging for disordered systems and colloids dispersed in insulating matrices. Here, we investigate the effect of plasmonic coupling on optomechanics with Brillouin light spectroscopy (BLS) in a prototypical metal-polymer nanocomposite, gold nanorods (Au NRs) in polyvinyl alcohol. The intensity of the light inelastically scattered on thermal phonons captured by BLS is strongly affected by the wavelength of the probing light. When light is resonant with the transverse plasmons, BLS reveals mostly the normal vibrational modes of single NRs. For lower energy off-resonant light, BLS is dominated by coupled bending modes of NR dimers. The experimental results, supported by optomechanical calculations, document plasmonically enhanced BLS and reveal energy-dependent confinement of coupled plasmons close to the tips of NR dimers, generating BLS hot-spots. Our work establishes BLS as an optomechanical probe of plasmons and promotes nanorod-soft matter nanocomposites for acousto-plasmonic applications.
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Affiliation(s)
| | - Adnane Noual
- LPMR,
Département de Physique, Faculté des Sciences, Université Mohammed Premier, Oujda, 60000, Morocco
| | - Yuchen Wang
- Department
of Materials Science and Engineering, University
of Pennsylvania, 3231 Walnut Street, Philadelphia, Pennsylvania 19104, United States
| | - Bartlomiej Graczykowski
- Faculty
of Physics, Adam Mickiewicz University, 61-614 Poznan, Poland
- Max
Planck Institute for Polymer Research, 55128 Mainz, Germany
| | - Bahram Djafari-Rouhani
- Département
de Physique, Institut d’Electronique de Microélectonique
et de Nanotechnologie, UMR CNRS 8520, Université
de Lille, Villeneuve
d’Ascq, 59655, France
| | - Shu Yang
- Department
of Materials Science and Engineering, University
of Pennsylvania, 3231 Walnut Street, Philadelphia, Pennsylvania 19104, United States
| | - George Fytas
- Max
Planck Institute for Polymer Research, 55128 Mainz, Germany
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5
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Gong T, Das CM, Yin MJ, Lv TR, Singh NM, Soehartono AM, Singh G, An QF, Yong KT. Development of SERS tags for human diseases screening and detection. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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6
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Uthe B, Sader JE, Pelton M. Optical measurement of the picosecond fluid mechanics in simple liquids generated by vibrating nanoparticles: a review. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2022; 85:103001. [PMID: 36049471 DOI: 10.1088/1361-6633/ac8e82] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 09/01/2022] [Indexed: 06/15/2023]
Abstract
Standard continuum assumptions commonly used to describe the fluid mechanics of simple liquids have the potential to break down when considering flows at the nanometer scale. Two common assumptions for simple molecular liquids are that (1) they exhibit a Newtonian response, where the viscosity uniquely specifies the linear relationship between the stress and strain rate, and (2) the liquid moves in tandem with the solid at any solid-liquid interface, known as the no-slip condition. However, even simple molecular liquids can exhibit a non-Newtonian, viscoelastic response at the picosecond time scales that are characteristic of the motion of many nanoscale objects; this viscoelasticity arises because these time scales can be comparable to those of molecular relaxation in the liquid. In addition, even liquids that wet solid surfaces can exhibit nanometer-scale slip at those surfaces. It has recently become possible to interrogate the viscoelastic response of simple liquids and associated nanoscale slip using optical measurements of the mechanical vibrations of metal nanoparticles. Plasmon resonances in metal nanoparticles provide strong optical signals that can be accessed by several spectroscopies, most notably ultrafast transient-absorption spectroscopy. These spectroscopies have been used to measure the frequency and damping rate of acoustic oscillations in the nanoparticles, providing quantitative information about mechanical coupling and exchange of mechanical energy between the solid particle and its surrounding liquid. This information, in turn, has been used to elucidate the rheology of viscoelastic simple liquids at the nanoscale in terms of their constitutive relations, taking into account separate viscoelastic responses for both shear and compressible flows. The nanoparticle vibrations have also been used to provide quantitative measurements of slip lengths on the single-nanometer scale. Viscoelasticity has been shown to amplify nanoscale slip, illustrating the interplay between different aspects of the unconventional fluid dynamics of simple liquids at nanometer length scales and picosecond time scales.
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Affiliation(s)
- Brian Uthe
- Department of Physics, UMBC (University of Maryland, Baltimore County), Baltimore, MD 21250, United States of America
| | - John E Sader
- School of Mathematics and Statistics, The University of Melbourne, Victoria 3010, Australia
| | - Matthew Pelton
- Department of Physics, UMBC (University of Maryland, Baltimore County), Baltimore, MD 21250, United States of America
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7
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Wang Z, Kim H, Secchi M, Montagna M, Furst EM, Djafari-Rouhani B, Fytas G. Quantization of Acoustic Modes in Dumbbell Nanoparticles. PHYSICAL REVIEW LETTERS 2022; 128:048003. [PMID: 35148122 DOI: 10.1103/physrevlett.128.048003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 01/05/2022] [Indexed: 06/14/2023]
Abstract
The vibrational eigenmodes of dumbbell-shaped polystyrene nanoparticles are recorded by Brillouin light spectroscopy (BLS), and the full experimental spectra are calculated theoretically. Different from spheres with a degeneracy of (2l+1), with l being the angular momentum quantum number, the eigenmodes of dumbbells are either singly or doubly degenerate owing to their axial symmetry. The BLS spectrum reveals a new, low-frequency peak, which is attributed to the out-of-phase vibration of the two lobes of the dumbbell. The quantization of acoustic modes in these molecule-shaped dumbbell particles evolves from the primary colloidal spheres as the separation between the two lobes increases.
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Affiliation(s)
- Zuyuan Wang
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
- Institute for Measurement and Automation, Division of Sensor Technology and Measurement Systems, Bundeswehr University Munich, Werner Heisenberg Weg 39, 85579 Neubiberg, Germany
| | - Hojin Kim
- Department of Chemical & Biomolecular Engineering, Allan P. Colburn Laboratory, University of Delaware, Newark, Delaware 19716, USA
| | - Maria Secchi
- Department of Industrial Engineering, University of Trento, via Sommarive 9, I-38123 Trento, Italy
| | - Maurizio Montagna
- Dipartimento di Fisica, Universitá di Trento, via Sommarive 14, I-38123 Trento, Italy
| | - Eric M Furst
- Department of Chemical & Biomolecular Engineering, Allan P. Colburn Laboratory, University of Delaware, Newark, Delaware 19716, USA
| | - Bahram Djafari-Rouhani
- Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN), UMRCNRS 8520, Department of Physics, University of Lille, Villeneuve d'Ascq 59655, France
| | - George Fytas
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
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8
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Wang J, Kang E, Sultan U, Merle B, Inayat A, Graczykowski B, Fytas G, Vogel N. Influence of Surfactant-Mediated Interparticle Contacts on the Mechanical Stability of Supraparticles. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:23445-23456. [PMID: 34737841 PMCID: PMC8558861 DOI: 10.1021/acs.jpcc.1c06839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/15/2021] [Indexed: 05/14/2023]
Abstract
Colloidal supraparticles are micron-scale spherical assemblies of uniform primary particles, which exhibit emergent properties of a colloidal crystal, yet exist as a dispersible powder. A prerequisite to utilize these emergent functionalities is that the supraparticles maintain their mechanical integrity upon the mechanical impacts that are likely to occur during processing. Understanding how the internal structure relates to the resultant mechanical properties of a supraparticle is therefore of general interest. Here, we take the example of supraparticles templated from water/fluorinated oil emulsions in droplet-based microfluidics and explore the effect of surfactants on their mechanical properties. Stable emulsions can be generated by nonionic block copolymers consisting of a hydrophilic and fluorophilic block and anionic fluorosurfactants widely available under the brand name Krytox. The supraparticles formed in the presence of both types of surfactants appear structurally similar, but differ greatly in their mechanical properties. While the nonionic surfactant induces superior mechanical stability and ductile fracture behavior, the anionic Krytox surfactant leads to weak supraparticles with brittle fracture. We complement this macroscopic picture with Brillouin light spectroscopy that is very sensitive to the interparticle contacts for subnanometer-thick adsorbed layers atop of the nanoparticle. While the anionic Krytox does not significantly affect the interparticle bonds, the amphiphilic nonionic surfactant drastically strengthens these bonds to the point that individual particle vibrations are not resolved in the experimental spectrum. Our results demonstrate that seemingly subtle changes in the physicochemical properties of supraparticles can drastically impact the resultant mechanical properties.
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Affiliation(s)
- Junwei Wang
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany
| | - Eunsoo Kang
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Umair Sultan
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany
- Institute
of Chemical Reaction Engineering, Friedrich-Alexander
University Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Benoit Merle
- Materials
Science and Engineering I and Interdisciplinary Center for Nanostructured
Films (IZNF), Friedrich-Alexander University
Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Alexandra Inayat
- Institute
of Chemical Reaction Engineering, Friedrich-Alexander
University Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Bartlomiej Graczykowski
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Faculty
of Physics, Adam Mickiewicz University, Uniwersytetu Poznanskiego 2, Poznan 61-614, Poland
| | - George Fytas
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- E-mail:
| | - Nicolas Vogel
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, Cauerstrasse 4, 91058 Erlangen, Germany
- E-mail:
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9
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Wang J, Li M, Jiang Y, Yu K, Hartland GV, Wang GP. Polymer dependent acoustic mode coupling and Hooke's law spring constants in stacked gold nanoplates. J Chem Phys 2021; 155:144701. [PMID: 34654293 DOI: 10.1063/5.0066661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Metal nanoparticles are excellent acoustic resonators and their vibrational spectroscopy has been widely investigated. However, the coupling between vibrational modes of different nanoparticles is less explored. For example, how the intervening medium affects the coupling strength is not known. Here, we investigate how different polymers affect coupling in Au nanoplate-polymer-Au nanoplate sandwich structures. The coupling between the breathing modes of the Au nanoplates was measured using single-particle pump-probe spectroscopy, and the polymer dependent coupling strength was determined experimentally. Analysis of the acoustic mode coupling gives the effective spring constant for the polymers. A relative motion mode was also observed for the stacked Au nanoplates. The frequency of this mode is strongly correlated with the coupling constant for the breathing modes. The breathing mode coupling and relative motion mode were analyzed using a coupled oscillator model. This model shows that both these effects can be described using the same spring constant for the polymer. Finally, we present a new type of mass balance using the strongly coupled resonators. We show that the resonators have a mass detection limit of a few femtograms. We envision that further understanding of the vibrational coupling in acoustic resonators will improve the coupling strength and expand their potential applications.
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Affiliation(s)
- Junzhong Wang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Mengying Li
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Yiqi Jiang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Kuai Yu
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Gregory V Hartland
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Guo Ping Wang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
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10
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Noual A, Kang E, Maji T, Gkikas M, Djafari-Rouhani B, Fytas G. Optomechanic Coupling in Ag Polymer Nanocomposite Films. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:14854-14864. [PMID: 34295447 PMCID: PMC8287562 DOI: 10.1021/acs.jpcc.1c04549] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/15/2021] [Indexed: 05/08/2023]
Abstract
Particle vibrational spectroscopy has emerged as a new tool for the measurement of elasticity, glass transition, and interactions at a nanoscale. For colloid-based materials, however, the weakly localized particle resonances in a fluid or solid medium renders their detection difficult. The strong amplification of the inelastic light scattering near surface plasmon resonance of metallic nanoparticles (NPs) allowed not only the detection of single NP eigenvibrations but also the interparticle interaction effects on the acoustic vibrations of NPs mediated by strong optomechanical coupling. The "rattling" and quadrupolar modes of Ag/polymer and polymer-grafted Ag NPs with different diameters in their assemblies are probed by Brillouin light spectroscopy (BLS). We present thorough theoretical 3D calculations for anisotropic Ag elasticity to quantify the frequency and intensity of the "rattling" mode and hence its BLS activity for different interparticle separations and matrix rigidity. Theoretically, a liquidlike environment, e.g., poly(isobutylene) (PIB) does not support rattling vibration of Ag dimers but unexpectedly hardening of the extremely confined graft melt renders both activation of the former and a frequency blue shift of the fundamental quadrupolar mode in the grafted nanoparticle Ag@PIB film.
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Affiliation(s)
- Adnane Noual
- Faculté
Pluridisciplinaire Nador, LPMR, Université
Mohammed Premier, Oujda BP 717-60 000, Morocco
| | - Eunsoo Kang
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
| | - Tanmoy Maji
- Department
of Chemistry, University of Massachusetts
Lowell, Lowell, Massachusetts 01854, United States
| | - Manos Gkikas
- Department
of Chemistry, University of Massachusetts
Lowell, Lowell, Massachusetts 01854, United States
| | - Bahram Djafari-Rouhani
- Institut
d’Électronique, de Microélectronique et de Nanotechnologie
(IEMN), UMR-CNRS 8520, Department of Physics, University of Lille, Villeneuve d’Ascq 59655, France
| | - George Fytas
- Max
Planck Institute for Polymer Research, Ackermannweg 10, Mainz 55128, Germany
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11
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Gorelik VS, Tcherniega NV, Shevchenko MA, Pyatyshev AY, Umanskaya SF, Voropinov AV, Bi D. Stimulated boson-peak light scattering in an aqueous suspension of spherical nanoparticles of amorphous SiO 2 of similar sizes. SOFT MATTER 2020; 16:8848-8853. [PMID: 33026042 DOI: 10.1039/d0sm01180k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A forward-directed high-efficiency stimulated inelastic light scattering was detected in an aqueous suspension of spherical nanoparticles (nanoballs) of amorphous SiO2 of similar sizes (0.25 μm) with a concentration of 1013 cm-3. In the stimulated scattering spectrum, there was an intense forward directed Stokes component with a frequency shift of 0.54 cm-1, corresponding to the boson peak mode of spherical nanoparticles. The results obtained are of interest for non-equilibrium excitation of spherical particles of similar sizes of different nature present in liquids (clusters, fullerenes, spherical macromolecules, viruses, etc.).
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Affiliation(s)
- Vladimir S Gorelik
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991, Russia. and Bauman Moscow State Technical University, Moscow, 105005, Russia
| | - Nikolay V Tcherniega
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991, Russia.
| | - Mikhail A Shevchenko
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991, Russia.
| | - Alexander Yu Pyatyshev
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991, Russia.
| | - Sofya F Umanskaya
- P. N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, 119991, Russia.
| | | | - Dongxue Bi
- Bauman Moscow State Technical University, Moscow, 105005, Russia
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12
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Graczykowski B, Vogel N, Bley K, Butt HJ, Fytas G. Multiband Hypersound Filtering in Two-Dimensional Colloidal Crystals: Adhesion, Resonances, and Periodicity. NANO LETTERS 2020; 20:1883-1889. [PMID: 32017578 PMCID: PMC7068716 DOI: 10.1021/acs.nanolett.9b05101] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/29/2020] [Indexed: 05/27/2023]
Abstract
The hypersonic phonon propagation in large-area two-dimensional colloidal crystals is probed by spontaneous micro Brillouin light scattering. The dispersion relation of thermally populated Lamb waves reveals multiband filtering due to three distinct types of acoustic band gaps. We find Bragg gaps accompanied by two types of hybridization gaps in both sub- and superwavelength regimes resulting from contact-based resonances and nanoparticle eigenmodes, respectively. The operating GHz frequencies can be tuned by particle size and depend on the adhesion at the contact interfaces. The experimental dispersion relations are well represented by a finite element method model enabling identification of observed modes. The presented approach also allows for contactless study of the contact stiffness of submicrometer particles, which reveals size effect deviating from macroscopic predictions.
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Affiliation(s)
- Bartlomiej Graczykowski
- Faculty
of Physics, Adam Mickiewicz University, Uniwersytetu Poznanskiego 2, 61-614 Poznan, Poland
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Nicolas Vogel
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Karina Bley
- Institute
of Particle Technology, Friedrich-Alexander
University Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Hans-Jürgen Butt
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - George Fytas
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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13
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Wang J, Yang Y, Wang N, Yu K, Hartland GV, Wang GP. Long Lifetime and Coupling of Acoustic Vibrations of Gold Nanoplates on Unsupported Thin Films. J Phys Chem A 2019; 123:10339-10346. [DOI: 10.1021/acs.jpca.9b08733] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Junzhong Wang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Yang Yang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Neng Wang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Kuai Yu
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
| | - Gregory V. Hartland
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Guo Ping Wang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
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14
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Medeghini F, Rouxel R, Crut A, Maioli P, Rossella F, Banfi F, Vallée F, Del Fatti N. Signatures of Small Morphological Anisotropies in the Plasmonic and Vibrational Responses of Individual Nano-objects. J Phys Chem Lett 2019; 10:5372-5380. [PMID: 31449419 DOI: 10.1021/acs.jpclett.9b01898] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The plasmonic and vibrational properties of single gold nanodisks patterned on a sapphire substrate are investigated via spatial modulation and pump-probe optical spectroscopies. The features of the measured extinction spectra and time-resolved signals are highly sensitive to minute deviations of the nanodisk morphology from a perfectly cylindrical one. An elliptical nanodisk section, as compared to a circular one, lifts the degeneracy of the two nanodisk in-plane dipolar surface plasmon resonances, which can be selectively excited by controlling the polarization of the incident light. This splitting effect, whose amplitude increases with nanodisk ellipticity, correlates with the detection of additional vibrational modes in the context of time-resolved spectroscopy. Analysis of the measurements is performed through the combination of optical and acoustic numerical models. This allows us first to estimate the dimensions of the investigated nanodisks from their plasmonic response and then to compare the measured and computed frequencies of their detectable vibrational modes, which are found to be in excellent agreement. This study demonstrates that single-particle optical spectroscopies are able to provide access to fine morphological characteristics, representing in this case a valuable alternative to traditional techniques aimed at postfabrication inspection of subwavelength nanodevice morphology.
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Affiliation(s)
- Fabio Medeghini
- FemtoNanoOptics group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Romain Rouxel
- FemtoNanoOptics group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Aurélien Crut
- FemtoNanoOptics group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Paolo Maioli
- FemtoNanoOptics group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Francesco Rossella
- NEST , Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza S. Silvestro 12 , I-56124 Pisa , Italy
| | - Francesco Banfi
- FemtoNanoOptics group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
- Interdisciplinary Laboratories for Advanced Materials Physics (I-LAMP) , Università Cattolica del Sacro Cuore , I-25121 Brescia , Italy
| | - Fabrice Vallée
- FemtoNanoOptics group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Natalia Del Fatti
- FemtoNanoOptics group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
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15
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Wang J, Yu K, Yang Y, Hartland GV, Sader JE, Wang GP. Strong vibrational coupling in room temperature plasmonic resonators. Nat Commun 2019; 10:1527. [PMID: 30948721 PMCID: PMC6449381 DOI: 10.1038/s41467-019-09594-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 03/18/2019] [Indexed: 12/22/2022] Open
Abstract
Strong vibrational coupling has been realized in a variety of mechanical systems. However, there have been no experimental observations of strong coupling of the acoustic modes of plasmonic nanostructures, due to rapid energy dissipation in these systems. Here we realized strong vibrational coupling in ultra-high frequency plasmonic nanoresonators by increasing the vibrational quality factors by an order of magnitude. We achieved the highest frequency quality factor products of f × Q = 1.0 × 1013 Hz for the fundamental mechanical modes, which exceeds the value of 0.6 × 1013 Hz required for ground state cooling. Avoided crossing was observed between vibrational modes of two plasmonic nanoresonators with a coupling rate of g = 7.5 ± 1.2 GHz, an order of magnitude larger than the dissipation rates. The intermodal strong coupling was consistent with theoretical calculations using a coupled oscillator model. Our results enabled a platform for future observation and control of the quantum behavior of phonon modes in metallic nanoparticles. Strong vibrational coupling has not been observed in ultra-high frequency mechanical resonators. By engineering phonon dissipation pathways, the authors increase the vibrational quality factor to allow strong coupling observations in plasmonic nanostructures, which has implications for observation and control of quantum phonon dynamics.
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Affiliation(s)
- Junzhong Wang
- College of Electronic Science and Technology, Shenzhen University, Shenzhen, 518060, China
| | - Kuai Yu
- College of Electronic Science and Technology, Shenzhen University, Shenzhen, 518060, China.
| | - Yang Yang
- College of Electronic Science and Technology, Shenzhen University, Shenzhen, 518060, China
| | - Gregory V Hartland
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - John E Sader
- ARC Centre of Excellence in Exciton Science, School of Mathematics and Statistics, The University of Melbourne, Melbourne, VIC, 3010, Australia
| | - Guo Ping Wang
- College of Electronic Science and Technology, Shenzhen University, Shenzhen, 518060, China.
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16
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Medeghini F, Crut A, Gandolfi M, Rossella F, Maioli P, Vallée F, Banfi F, Del Fatti N. Controlling the Quality Factor of a Single Acoustic Nanoresonator by Tuning its Morphology. NANO LETTERS 2018; 18:5159-5166. [PMID: 29989822 DOI: 10.1021/acs.nanolett.8b02096] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The mechanical vibrations of individual gold nanodisks nanopatterned on a sapphire substrate are investigated using ultrafast time-resolved optical spectroscopy. The number and characteristics of the detected acoustic modes are found to vary with nanodisk geometry. In particular, their quality factors strongly depend on nanodisk aspect ratio (i.e., diameter over height ratio), reaching a maximal value of ≈70, higher than those previously measured for substrate-supported nano-objects. The peculiarities of the detected acoustic vibrations are confirmed by finite-element simulations, and interpreted as the result of substrate-induced hybridization between the vibrational modes of a nanodisk. The present findings demonstrate novel possibilities for engineering the vibrational modes of nano-objects.
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Affiliation(s)
- Fabio Medeghini
- FemtoNanoOptics Group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Aurélien Crut
- FemtoNanoOptics Group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Marco Gandolfi
- Interdisciplinary Laboratories for Advanced Materials Physics (I-LAMP) , Università Cattolica del Sacro Cuore , Brescia I-25121 , Italy
- Dipartimento di Matematica e Fisica , Università Cattolica del Sacro Cuore , Brescia I-25121 , Italy
- Laboratory of Soft Matter and Biophysics, Department of Physics and Astronomy , KU Leuven , Celestijnenlaan 200D , B-3001 Heverlee, Leuven , Belgium
| | - Francesco Rossella
- NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR , Piazza S. Silvestro 12 , I-56124 Pisa , Italy
| | - Paolo Maioli
- FemtoNanoOptics Group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Fabrice Vallée
- FemtoNanoOptics Group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
| | - Francesco Banfi
- Interdisciplinary Laboratories for Advanced Materials Physics (I-LAMP) , Università Cattolica del Sacro Cuore , Brescia I-25121 , Italy
| | - Natalia Del Fatti
- FemtoNanoOptics Group , Université de Lyon, CNRS, Université Claude Bernard Lyon 1, Institut Lumière Matière , F-69622 Villeurbanne , France
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