1
|
Mougkogiannis P, Adamatzky A. Recognition of sounds by ensembles of proteinoids. Mater Today Bio 2024; 25:100989. [PMID: 38384791 PMCID: PMC10879779 DOI: 10.1016/j.mtbio.2024.100989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/31/2024] [Accepted: 02/02/2024] [Indexed: 02/23/2024] Open
Abstract
Proteinoids are artificial polymers that imitate certain characteristics of natural proteins, including self-organization, catalytic activity, and responsiveness to external stimuli. This paper examines the acoustic response properties of proteinoids microspheres when exposed to auditory stimuli. We convert sounds of English alphabet into waveforms of electrical potential, feed the waveforms into proteinoid solutions and record electrical responses of the proteinoids. We also undertake a detailed comparison of proteinoids' electrical responses (frequencies, periods, and amplitudes) with original input signals. We found that responses of proteinoids are less regular, lower dominant frequency, wider distribution of proteinoids and less skewed distribution of amplitudes compared with input signals. We found that resonant acoustic excitation of proteinoids generates unique electrical impulse patterns dependent on sound frequency and amplitude. The finding will be used in further designs of organic electronic devices, based on ensembles of proteinoids, for sound processing and speech recognition. Our findings provide the first quantitative investigation into the potential of thermal proteinoid microspheres for bio-inspired sound processing and recognition applications. Using controlled speaker excitation on proteinoid samples, we create reliable markers of productive acoustic response capacities, paving the way for future advancement.
Collapse
|
2
|
Altering Terahertz Sound Propagation in a Liquid upon Nanoparticle Immersion. NANOMATERIALS 2022; 12:nano12142401. [PMID: 35889625 PMCID: PMC9318512 DOI: 10.3390/nano12142401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/11/2022] [Accepted: 07/12/2022] [Indexed: 11/25/2022]
Abstract
One of the grand challenges of new generation Condensed Matter physicists is the development of novel devices enabling the control of sound propagation at terahertz frequency. Indeed, phonon excitations in this frequency window are the leading conveyor of heat transfer in insulators. Their manipulation is thus critical to implementing heat management based on the structural design. To explore the possibility of controlling the damping of sound waves, we used high spectral contrast Inelastic X-ray Scattering (IXS) to comparatively study terahertz acoustic damping in a dilute suspension of 50 nm nanospheres in glycerol and on pure glycerol. Bayesian inference-based modeling of measured spectra indicates that, at sufficiently large distances, the spectral contribution of collective modes in the glycerol suspension becomes barely detectable due to the enhanced damping, the weakening, and the slight softening of the dominant acoustic mode.
Collapse
|
3
|
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.
Collapse
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
| |
Collapse
|
4
|
Lynch ST, De Francesco A, Scaccia L, Cunsolo A. Controlling terahertz sound propagation: some preliminary Inelastic X-Ray Scattering result. EPJ WEB OF CONFERENCES 2022. [DOI: 10.1051/epjconf/202227201010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The control of sound propagation in materials via the design of their elastic properties is an exciting task at the forefront of Condensed Matter. It becomes especially compelling at terahertz frequencies, where phonons are the primary conveyors of heat flow. Despite the increasing focus on this goal, this field of research is still in its infancy; To achieve a few advances in this field, we performed several Inelastic X-Ray Scattering (IXS) measurements on elementary systems as dilute suspensions of nanoparticles (NPs) in liquids. We found that nanoparticles can effectively impact the sound propagation of the hosting liquid. We also explored the possibility of shaping terahertz sound propagation in a liquid upon confinement on quasi-unidimensional cavities. These results are here reviewed and discussed, and future research directions are finally outlined.
Collapse
|
5
|
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.
Collapse
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:
| |
Collapse
|
6
|
De Francesco A, Scaccia L, Formisano F, Guarini E, Bafile U, Maccarini M, Zhang Y, Nykypanchuck D, Alatas A, Cunsolo A. The damping of terahertz acoustic modes in aqueous nanoparticle suspensions. Sci Rep 2021; 11:20110. [PMID: 34635734 PMCID: PMC8505432 DOI: 10.1038/s41598-021-99503-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 09/20/2021] [Indexed: 11/23/2022] Open
Abstract
In this work, we investigate the possibility of controlling the acoustic damping in a liquid when nanoparticles are suspended in it. To shed light on this topic, we performed Inelastic X-Ray Scattering (IXS) measurements of the terahertz collective dynamics of aqueous suspensions of nanospheres of various materials, size, and relative concentration, either charged or neutral. A Bayesian analysis of measured spectra indicates that the damping of the two acoustic modes of water increases upon nanoparticle immersion. This effect seems particularly pronounced for the longitudinal acoustic mode, which, whenever visible at all, rapidly damps off when increasing the exchanged wavevector. Results also indicate that the observed effect strongly depends on the material the immersed nanoparticles are made of.
Collapse
Affiliation(s)
- Alessio De Francesco
- CNR-IOM & INSIDE@ILL c/o Operative Group in Grenoble (OGG), 38042, Grenoble, France
- Institut Laue-Langevin (ILL), 38042, Grenoble, France
| | - Luisa Scaccia
- Dipartimento di Economia e Diritto, Università di Macerata, Via Crescimbeni 20, 62100, Macerata, Italy
| | - Ferdinando Formisano
- CNR-IOM & INSIDE@ILL c/o Operative Group in Grenoble (OGG), 38042, Grenoble, France
- Institut Laue-Langevin (ILL), 38042, Grenoble, France
| | - Eleonora Guarini
- Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, 50019, Sesto Fiorentino, Italy
| | - Ubaldo Bafile
- Consiglio Nazionale delle Ricerche, Istituto di Fisica Applicata "Nello Carrara", via Madonna del Piano 10, 50019, Sesto Fiorentino, Italy
| | - Marco Maccarini
- Laboratoire TIMC/IMAG UMR CNRS 5525, Université Grenoble-Alpes, 38000, Grenoble, France
| | - Yugang Zhang
- Brookhaven National Laboratory, Center for Functional Nanomaterials, P.O. Box 5000, Upton, 11973, NY, USA
| | - Dmytro Nykypanchuck
- Brookhaven National Laboratory, Center for Functional Nanomaterials, P.O. Box 5000, Upton, 11973, NY, USA
| | - Ahmet Alatas
- Argonne National Laboratory, Advanced Photon Source, P.O. Box 5000, Upton, 11973, NY, USA
| | - Alessandro Cunsolo
- Department of Physics, University of Wisconsin at Madison, 1150 University Avenue, Madison, WI, USA.
| |
Collapse
|
7
|
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.).
Collapse
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
| |
Collapse
|
8
|
De Francesco A, Scaccia L, Formisano F, Guarini E, Bafile U, Maccarini M, Alatas A, Cai YQ, Nykypanchuk D, Cunsolo A. Onset of interfacial waves in the terahertz spectrum of a nanoparticle suspension. Phys Rev E 2020; 102:022601. [PMID: 32942392 DOI: 10.1103/physreve.102.022601] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Accepted: 07/13/2020] [Indexed: 11/06/2022]
Abstract
We used inelastic x-ray scattering to gain insight into the complex terahertz dynamics of a diluted Au-nanoparticle suspension in glycerol. We observe that, albeit sparse, Au nanoparticles leave clear signatures on the dynamic response of the system, the main one being an additional mode propagating at the nanoparticle-glycerol interface. A Bayesian inferential analysis of the line shape reveals that such a mode, at variance with conventional acoustic modes, keeps a hydrodynamiclike behavior well beyond the continuous limit and down to subnanometer distances.
Collapse
Affiliation(s)
- Alessio De Francesco
- Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, Operative Group in Grenoble (OGG) F-38042 Grenoble, France.,Institut Laue-Langevin (ILL), F-38042 Grenoble, France
| | - Luisa Scaccia
- Dipartimento di Economia e Diritto, Università di Macerata, Via Crescimbeni 20, 62100 Macerata, Italy
| | - Ferdinando Formisano
- Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, Operative Group in Grenoble (OGG) F-38042 Grenoble, France.,Institut Laue-Langevin (ILL), F-38042 Grenoble, France
| | - Eleonora Guarini
- Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino, Italy
| | - Ubaldo Bafile
- Consiglio Nazionale delle Ricerche, Istituto di Fisica Applicata "Nello Carrara," via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy
| | - Marco Maccarini
- Université Grenoble-Alpes, CNRS, Grenoble INP, TIMC-IMAG, 38000 Grenoble, France
| | - Ahmet Alatas
- Argonne National Laboratory, Advanced Photon Source, P.O. Box 5000, Upton, New York 11973, USA
| | - Yong Q Cai
- Brookhaven National Laboratory, National Synchrotron Light Source, NSLS II, P.O. Box 5000, Upton, New York 11973, USA
| | - Dmytro Nykypanchuk
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA
| | - Alessandro Cunsolo
- Brookhaven National Laboratory, National Synchrotron Light Source, NSLS II, P.O. Box 5000, Upton, New York 11973, USA
| |
Collapse
|
9
|
De Francesco A, Scaccia L, Formisano F, Guarini E, Bafile U, Maccarini M, Alatas A, Cai YQ, Cunsolo A. The Terahertz Dynamics of an Aqueous Nanoparticle Suspension: An Inelastic X-ray Scattering Study. NANOMATERIALS 2020; 10:nano10050860. [PMID: 32365679 PMCID: PMC7711609 DOI: 10.3390/nano10050860] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 11/16/2022]
Abstract
We used the high-resolution Inelastic X-ray Scattering beamline of the Advanced Photon Source at Argonne National Laboratory to measure the terahertz spectrum of pure water and a dilute aqueous suspension of 15 nm diameter spherical Au nanoparticles (Au-NPs). We observe that, despite their sparse volume concentration of about 0.5%, the immersed NPs strongly influence the collective molecular dynamics of the hosting liquid. We investigate this effect through a Bayesian inference analysis of the spectral lineshape, which elucidates how terahertz transport properties of water change upon Au-NP immersion. In particular, we observe a nearly complete disappearance of the longitudinal acoustic mode and a mildly decreased ability to support shear wave propagation.
Collapse
Affiliation(s)
- Alessio De Francesco
- Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, Operative Group in Grenoble (OGG), F-38042 Grenoble, France; (A.D.F.); (F.F.)
- Institut Laue-Langevin (ILL), F-38042 Grenoble, France
| | - Luisa Scaccia
- Dipartimento di Economia e Diritto, Università di Macerata, Via Crescimbeni 20, 62100 Macerata, Italy;
| | - Ferdinando Formisano
- Consiglio Nazionale delle Ricerche, Istituto Officina dei Materiali, Operative Group in Grenoble (OGG), F-38042 Grenoble, France; (A.D.F.); (F.F.)
- Institut Laue-Langevin (ILL), F-38042 Grenoble, France
| | - Eleonora Guarini
- Dipartimento di Fisica e Astronomia, Università di Firenze, via G. Sansone 1, I-50019 Sesto Fiorentino, Italy;
| | - Ubaldo Bafile
- Consiglio Nazionale delle Ricerche, Istituto di Fisica Applicata ”Nello Carrara”, via Madonna del Piano 10, I-50019 Sesto Fiorentino, Italy;
| | - Marco Maccarini
- Université Grenoble-Alpes - Laboratoire TIMC/IMAG UMR CNRS 5525, 38000 Grenoble, France;
| | - Ahmet Alatas
- Argonne National Laboratory, Advanced Photon Source, P.O. Box 5000 Upton, 11973 NY, USA;
| | - Yong Q. Cai
- Brookhaven National Laboratory-National Synchrotron Light Source-NSLS II, P.O. Box 5000, Upton, 11973 NY, USA;
| | - Alessandro Cunsolo
- Brookhaven National Laboratory-National Synchrotron Light Source-NSLS II, P.O. Box 5000, Upton, 11973 NY, USA;
- Correspondence: ; Tel.: +1-631-327-1927
| |
Collapse
|
10
|
Kim H, Cang Y, Kang E, Graczykowski B, Secchi M, Montagna M, Priestley RD, Furst EM, Fytas G. Direct observation of polymer surface mobility via nanoparticle vibrations. Nat Commun 2018; 9:2918. [PMID: 30046038 PMCID: PMC6060150 DOI: 10.1038/s41467-018-04854-w] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 05/24/2018] [Indexed: 11/08/2022] Open
Abstract
Measuring polymer surface dynamics remains a formidable challenge of critical importance to applications ranging from pressure-sensitive adhesives to nanopatterning, where interfacial mobility is key to performance. Here, we introduce a methodology of Brillouin light spectroscopy to reveal polymer surface mobility via nanoparticle vibrations. By measuring the temperature-dependent vibrational modes of polystyrene nanoparticles, we identify the glass-transition temperature and calculate the elastic modulus of individual nanoparticles as a function of particle size and chemistry. Evidence of surface mobility is inferred from the first observation of a softening temperature, where the temperature dependence of the fundamental vibrational frequency of the nanoparticles reverses slope below the glass-transition temperature. Beyond the fundamental vibrational modes given by the shape and elasticity of the nanoparticles, another mode, termed the interaction-induced mode, was found to be related to the active particle-particle adhesion and dependent on the thermal behavior of nanoparticles.
Collapse
Affiliation(s)
- Hojin Kim
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA
| | - Yu Cang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Eunsoo Kang
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Bartlomiej Graczykowski
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
- NanoBioMedical Centre, Adam Mickiewicz University, ul. Umultowska 85, Poznan, 61-614, Poland
| | - Maria Secchi
- Department of Industrial Engineering, University of Trento, 38123, Trento, Italy
| | | | - Rodney D Priestley
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Eric M Furst
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE, 19716, USA.
| | - George Fytas
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany.
- IESL-FORTH, N. Plastira 100, 70013, Heraklion, Crete, Greece.
| |
Collapse
|
11
|
Schneider D, Schmitt M, Hui CM, Sainidou R, Rembert P, Matyjaszewski K, Bockstaller MR, Fytas G. Role of Polymer Graft Architecture on the Acoustic Eigenmode Formation in Densely Polymer-Tethered Colloidal Particles. ACS Macro Lett 2014; 3:1059-1063. [PMID: 35610792 DOI: 10.1021/mz500433h] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The concurrent evaluation of the vibration eigenfrequencies in densely polymer-tethered particle systems ("particle brushes") by Brillouin light scattering and elastodynamic theory reveals a distinctive change of acoustic eigenmode formation associated with polymer graft modification of colloidal particles. The eigenfrequencies of particle brushes reveal a characteristic red-shift compared to uniform core-shell particles that can only be rationalized by assuming imperfect boundary conditions and anisotropic elastic properties of the graft layer. The distinct characteristics of vibration modes in particle brush materials provide direct evidence for the implications of chain confinement on the nanomechanical properties of tethered chains. The results highlight a rich and hitherto unexplored parameter-space for controlling properties and interactions in particle-brush based systems that could spur the development of hybrid materials with novel functionalities.
Collapse
Affiliation(s)
- Dirk Schneider
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
| | - Michael Schmitt
- Department
of Materials Science and Engineering, Carnegie Mellon University, 5000
Forbes Ave., Pittsburgh, Pennsylvania 15213, United States
| | - Chin Ming Hui
- Chemistry
Department, Carnegie Mellon University, 4400 Fifth Ave., Pittsburgh, Pennsylvania 15213, United States
| | - Rebecca Sainidou
- Laboratoire
Ondes et Milieux Complexes (LOMC), UMR CNRS 6294, University of Le Havre, 75 Rue Bellot, 76058 Le Havre Cedex, France
| | - Pascal Rembert
- Laboratoire
Ondes et Milieux Complexes (LOMC), UMR CNRS 6294, University of Le Havre, 75 Rue Bellot, 76058 Le Havre Cedex, France
| | - Krzysztof Matyjaszewski
- Chemistry
Department, Carnegie Mellon University, 4400 Fifth Ave., Pittsburgh, Pennsylvania 15213, United States
| | - Michael R. Bockstaller
- Department
of Materials Science and Engineering, Carnegie Mellon University, 5000
Forbes Ave., Pittsburgh, Pennsylvania 15213, United States
| | - George Fytas
- Max Planck Institute
for Polymer Research, Ackermannweg
10, 55128 Mainz, Germany
- Department of
Materials Science and FORTH-IESL P.O. Box 1527, 71110 Heraklion, Greece
| |
Collapse
|
12
|
Still T, Gantzounis G, Kiefer D, Hellmann G, Sainidou R, Fytas G, Stefanou N. Collective hypersonic excitations in strongly multiple scattering colloids. PHYSICAL REVIEW LETTERS 2011; 106:175505. [PMID: 21635048 DOI: 10.1103/physrevlett.106.175505] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 12/15/2010] [Indexed: 05/30/2023]
Abstract
Unprecedented low-dispersion high-frequency acoustic excitations are observed in dense suspensions of elastically hard colloids. The experimental phononic band structure for SiO(2) particles with different sizes and volume fractions is well represented by rigorous full-elastodynamic multiple-scattering calculations. The slow phonons, which do not relate to particle resonances, are localized in the surrounding liquid medium and stem from coherent multiple scattering that becomes strong in the close-packing regime. Such rich phonon-matter interactions in nanostructures, being still unexplored, can open new opportunities in phononics.
Collapse
Affiliation(s)
- T Still
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | | | | | | | | | | | | |
Collapse
|
13
|
Abstract
Abstract
We consider in-plane elastic waves propagating through a doubly periodic array of cylinders of Tantalum (with both circular and elliptical cross-sections) which are embedded in a matrix of fused silica. We find some sonic gap for fairly small filling fractions of the cylinders which eventually vanish in the limit of high-filling fraction. In the case of a doubly periodic array of elliptical cylinders, removal of a cylinder within a macro-cell leads to two localised eigenstates.
Collapse
|
14
|
Vlassopoulos D, Fytas G. From Polymers to Colloids: Engineering the Dynamic Properties of Hairy Particles. HIGH SOLID DISPERSIONS 2009. [DOI: 10.1007/12_2009_31] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
|
15
|
Still T, Sainidou R, Retsch M, Jonas U, Spahn P, Hellmann GP, Fytas G. The "music" of core-shell spheres and hollow capsules: influence of the architecture on the mechanical properties at the nanoscale. NANO LETTERS 2008; 8:3194-9. [PMID: 18767884 DOI: 10.1021/nl801500n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We report on the first measurement of elastic vibrational modes in core-shell spheres (silica-poly(methyl methacrylate), SiO2-PMMA) and corresponding spherical hollow capsules (PMMA) with different particle size and shell thickness using Brillouin light scattering, supported by numerical calculations. These localized modes allow access to the mechanical moduli down to a few tens of nanometers. We observe reduced mechanical strength of the porous silica core, and for the core-shell spheres a striking increase of the moduli in both the SiO2 core and the PMMA shell. The peculiar behavior of the vibrational modes in the hollow capsules is attributed to antagonistic dependence on overall size and layer thickness in agreement with theoretical predictions.
Collapse
Affiliation(s)
- T Still
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | | | | | | | | | | | | |
Collapse
|
16
|
Still T, Cheng W, Retsch M, Sainidou R, Wang J, Jonas U, Stefanou N, Fytas G. Simultaneous occurrence of structure-directed and particle-resonance-induced phononic gaps in colloidal films. PHYSICAL REVIEW LETTERS 2008; 100:194301. [PMID: 18518452 DOI: 10.1103/physrevlett.100.194301] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2007] [Revised: 04/03/2008] [Indexed: 05/09/2023]
Abstract
We report on the observation of two hypersonic phononic gaps of different nature in three-dimensional colloidal films of nanospheres using Brillouin light scattering. One is a Bragg gap occurring at the edge of the first Brillouin zone along a high-symmetry crystal direction. The other is a hybridization gap in crystalline and amorphous films, originating from the interaction of the band of quadrupole particle eigenmodes with the acoustic effective-medium band, and its frequency position compares well with the computed lowest eigenfrequency. Structural disorder eliminates the Bragg gap, while the hybridization gap is robust.
Collapse
Affiliation(s)
- T Still
- Max Planck Institute for Polymer Research, Mainz, Germany
| | | | | | | | | | | | | | | |
Collapse
|
17
|
Andrianov IV, Bolshakov VI, Danishevs'kyy VV, Weichert D. Higher order asymptotic homogenization and wave propagation in periodic composite materials. Proc Math Phys Eng Sci 2008. [DOI: 10.1098/rspa.2007.0267] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
We present an application of the higher order asymptotic homogenization method (AHM) to the study of wave dispersion in periodic composite materials. When the wavelength of a travelling signal becomes comparable with the size of heterogeneities, successive reflections and refractions of the waves at the component interfaces lead to the formation of a complicated sequence of the pass and stop frequency bands. Application of the AHM provides a long-wave approximation valid in the low-frequency range. Solution for the high frequencies is obtained on the basis of the Floquet–Bloch approach by expanding spatially varying properties of a composite medium in a Fourier series and representing unknown displacement fields by infinite plane-wave expansions. Steady-state elastic longitudinal waves in a composite rod (one-dimensional problem allowing the exact analytical solution) and transverse anti-plane shear waves in a fibre-reinforced composite with a square lattice of cylindrical inclusions (two-dimensional problem) are considered. The dispersion curves are obtained, the pass and stop frequency bands are identified.
Collapse
Affiliation(s)
- Igor V Andrianov
- Institute of General MechanicsRWTH Aachen, Templergraben 64, Aachen 52062, Germany
| | - Vladimir I Bolshakov
- Department of Materials Science, Prydniprovska State Academy of Civil Engineering and ArchitectureChernyshevskogo 24-a, Dnipropetrovsk 49600, Ukraine
| | - Vladyslav V Danishevs'kyy
- Department of Materials Science, Prydniprovska State Academy of Civil Engineering and ArchitectureChernyshevskogo 24-a, Dnipropetrovsk 49600, Ukraine
| | - Dieter Weichert
- Institute of General MechanicsRWTH Aachen, Templergraben 64, Aachen 52062, Germany
| |
Collapse
|
18
|
Tommaseo G, Petekidis G, Steffen W, Fytas G, Schofield AB, Stefanou N. Hypersonic acoustic excitations in binary colloidal crystals: big versus small hard sphere control. J Chem Phys 2007; 126:014707. [PMID: 17212511 DOI: 10.1063/1.2429067] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The phononic band structure of two binary colloidal crystals, at hypersonic frequencies, is studied by means of Brillouin light scattering and analyzed in conjunction with corresponding dispersion diagrams of the single colloidal crystals of the constituent particles. Besides the acoustic band of the average medium, the authors' results show the existence of narrow bands originating from resonant multipole modes of the individual particles as well as Bragg-type modes due to the (short-range) periodicity. Strong interaction, leading to the occurrence of hybridization gaps, is observed between the acoustic band and the band of quadrupole modes of the particles that occupy the largest fractional volume of the mixed crystal; the effective radius is either that of the large (in the symmetric NaCl-type crystalline phase) or the small (in the asymmetric NaZn(13)-type crystalline phase) particles. The possibility to reveal a universal behavior of the phononic band structure for different single and binary colloidal crystalline suspensions, by representing in the dispersion diagrams reduced quantities using an appropriate length scale, is discussed.
Collapse
Affiliation(s)
- G Tommaseo
- Max Planck Institute for Polymer Research, P.O. Box 3148, 55021 Mainz, Germany
| | | | | | | | | | | |
Collapse
|
19
|
Faatz M, Cheng W, Wegner G, Fytas G, Penciu RS, Economou EN. Mechanical strength of amorphous CaCO3 colloidal spheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:6666-8. [PMID: 16008372 DOI: 10.1021/la050604m] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Amorphous glassy CaCO3 colloidal spheres of monomodal size distribution were studied by high-resolution Brillouin light scattering. The Young modulus of 37 GPa and shear modulus of 14 GPa of glassy CaCO3 at a density of 1.9 g/cm3 were extracted from the particle vibration frequencies by employing acoustic wave scattering cross-section calculations. The line shape of the low-frequency modes is a sensitive index of the particle polydispersity.
Collapse
Affiliation(s)
- Michael Faatz
- Max Planck Institute for Polymer Research, P.O. Box 3148, 55128 Mainz, Germany
| | | | | | | | | | | |
Collapse
|
20
|
Tommaseo G, Penciu RS, Fytas G, Economou EN, Hashimoto T, Hadjichristidis N. Phonon Propagation in Ordered Diblock Copolymer Solutions. Macromolecules 2004. [DOI: 10.1021/ma0496246] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- G. Tommaseo
- Max Planck Institute of Polymer Research, P.O. Box 3148, 55128 Mainz, Germany, FORTH/Institute of Electronic Structure and Laser, P.O. Box 1527, 71110 Heraklion, Greece, Department of Polymer Chemistry Graduate School of Engineering, Kyoto University, Kyoto 6158510 Japan, and Department of Chemistry, University of Athens, 15701 Zografou, Athens, Greece
| | - R. S. Penciu
- Max Planck Institute of Polymer Research, P.O. Box 3148, 55128 Mainz, Germany, FORTH/Institute of Electronic Structure and Laser, P.O. Box 1527, 71110 Heraklion, Greece, Department of Polymer Chemistry Graduate School of Engineering, Kyoto University, Kyoto 6158510 Japan, and Department of Chemistry, University of Athens, 15701 Zografou, Athens, Greece
| | - G. Fytas
- Max Planck Institute of Polymer Research, P.O. Box 3148, 55128 Mainz, Germany, FORTH/Institute of Electronic Structure and Laser, P.O. Box 1527, 71110 Heraklion, Greece, Department of Polymer Chemistry Graduate School of Engineering, Kyoto University, Kyoto 6158510 Japan, and Department of Chemistry, University of Athens, 15701 Zografou, Athens, Greece
| | - E. N. Economou
- Max Planck Institute of Polymer Research, P.O. Box 3148, 55128 Mainz, Germany, FORTH/Institute of Electronic Structure and Laser, P.O. Box 1527, 71110 Heraklion, Greece, Department of Polymer Chemistry Graduate School of Engineering, Kyoto University, Kyoto 6158510 Japan, and Department of Chemistry, University of Athens, 15701 Zografou, Athens, Greece
| | - T. Hashimoto
- Max Planck Institute of Polymer Research, P.O. Box 3148, 55128 Mainz, Germany, FORTH/Institute of Electronic Structure and Laser, P.O. Box 1527, 71110 Heraklion, Greece, Department of Polymer Chemistry Graduate School of Engineering, Kyoto University, Kyoto 6158510 Japan, and Department of Chemistry, University of Athens, 15701 Zografou, Athens, Greece
| | - N. Hadjichristidis
- Max Planck Institute of Polymer Research, P.O. Box 3148, 55128 Mainz, Germany, FORTH/Institute of Electronic Structure and Laser, P.O. Box 1527, 71110 Heraklion, Greece, Department of Polymer Chemistry Graduate School of Engineering, Kyoto University, Kyoto 6158510 Japan, and Department of Chemistry, University of Athens, 15701 Zografou, Athens, Greece
| |
Collapse
|
21
|
Vlassopoulos D. Colloidal star polymers: Models for studying dynamically arrested states in soft matter. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/polb.20152] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
22
|
Kriegs H, Petekidis G, Fytas G, Penciu RS, Economou EN, Schofield AB. Phonons in suspensions of hard sphere colloids: Volume fraction dependence. J Chem Phys 2004; 121:7849-54. [PMID: 15485247 DOI: 10.1063/1.1798973] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The propagation of sound waves in suspensions of hard sphere colloids is studied as a function of their volume fraction up to random close packing using Brillouin light scattering. The rich experimental phonon spectra of up to five phonon modes are successfully described by theoretical calculations based on the multiple scattering method. Two main types of phonon modes are revealed: Type A modes are acoustic excitations which set up deformations in both the solid (particles) and the liquid (solvent) phases; for type B modes the stress and strain are predominantly localized near the interface between the solid particles and the surrounding liquid (interface waves). While the former become harder (increase their effective sound velocity) as the particle volume fraction increases the latter become softer (the corresponding sound velocity decreases).
Collapse
Affiliation(s)
- H Kriegs
- Max-Planck Institute for Polymer Research, P.O. Box 3148, 55128 Mainz, Germany
| | | | | | | | | | | |
Collapse
|
23
|
Penciu RS, Kriegs H, Petekidis G, Fytas G, Economou EN. Phonons in colloidal systems. J Chem Phys 2003. [DOI: 10.1063/1.1553763] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
24
|
Urbas AM, Thomas EL, Kriegs H, Fytas G, Penciu RS, Economou LN. Acoustic excitations in a self-assembled block copolymer photonic crystal. PHYSICAL REVIEW LETTERS 2003; 90:108302. [PMID: 12689040 DOI: 10.1103/physrevlett.90.108302] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2002] [Indexed: 05/24/2023]
Abstract
High resolution Brillouin light scattering can sensitively detect acoustic phonons in concentrated solutions of a high molecular weight poly(styrene-b-isoprene) symmetric copolymer in toluene. This block copolymer lamellar forming system also possesses a photonic stop band in the visible spectrum. Based on the low but finite contrast in mechanical properties between the styrene and isoprene components and taking into account the geometrical characteristics of the layered microstructure, we calculate the acoustic band structure and represent the observed acousticlike and opticlike phonons.
Collapse
Affiliation(s)
- Augustine M Urbas
- Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA.
| | | | | | | | | | | |
Collapse
|
25
|
Zalipaev VV, Movchan AB, Poulton CG, McPhedran RC. Elastic waves and homogenization in oblique periodic structures. Proc Math Phys Eng Sci 2002. [DOI: 10.1098/rspa.2001.0948] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- V. V. Zalipaev
- Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, UK
| | - A. B. Movchan
- Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, UK
| | - C. G. Poulton
- Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX, UK
| | - R. C. McPhedran
- School of Physics, University of Sydney, Sydney 2006, Australia
| |
Collapse
|