1
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Reed BW, Chen E, Koski KJ. Tunable Chemochromism and Elastic Properties in Intercalated MoO 3: Au-, Cr-, Fe-, Ge-, Mn-, and Ni-MoO 3. ACS NANO 2024; 18:12845-12852. [PMID: 38712964 DOI: 10.1021/acsnano.4c00016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
Chemical tunability of the elastic constants of α-MoO3, a two-dimensional layered oxide, is demonstrated with mutability on the order of tens of GPa, simply by choice of a metal intercalant including Au, Cr, Fe, Ge, Mn, and Ni. Using Brillouin laser light scattering from confined acoustic phonons in nanometer-thick materials, the in-plane angular dispersion of the quantized acoustic phonon branches of 2D layered, intercalated MoO3 is measured and used to determine the bulk modulus (K), Young's moduli (E11, E22, and E33), each of the nine independent elastic tensor elements (cij), and the thickness. Intercalation of metals generally reduces the anisotropy in MoO3 except in Ge-MoO3, for which the in-plane longitudinal elastic anisotropy is unaffected. Chemochromism from transparent white (MoO3 and Fe-MoO3) to near black (Ni-MoO3) to brilliant dark blue (Ge-MoO3) is demonstrated and is associated with a reduction in electronic band gap with intercalation and an increase in absorption >600 nm for some intercalants (Cr-, Ge-, and Mn-MoO3).
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Affiliation(s)
- Bryan W Reed
- Integrated Dynamic Electron Solutions, Pleasanton, California 94588, United States
| | - Ethan Chen
- Department of Chemistry, University of California Davis, Davis, California 95616, United States
| | - Kristie J Koski
- Department of Chemistry, University of California Davis, Davis, California 95616, United States
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2
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Grabec T, Soudná Z, Repček K, Lünser K, Fähler S, Stoklasová P, Sedlák P, Seiner H. Guided acoustic waves in thin epitaxial films: Experiment and inverse problem solution for NiTi. ULTRASONICS 2023; 138:107211. [PMID: 38056319 DOI: 10.1016/j.ultras.2023.107211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 11/09/2023] [Accepted: 11/23/2023] [Indexed: 12/08/2023]
Abstract
Despite the fundamental and technological importance of the elastic constants, a suitable method for their full characterization in epitaxial films is missing. Here we show that transient grating spectroscopy (TGS) with highly k-vector-selective generation and detection of acoustic waves is capable of determination of all independent elastic coefficients of an epitaxial thin film grown on a single-crystalline substrate. This experimental setup enables detection of various types of guided acoustic waves and evaluation of the directional dependence of their speeds of propagation. For the studied model system, which is a 3μm thin epitaxial film of the NiTi shape memory alloy on an MgO substrate, the TGS angular maps include Rayleigh-type surface acoustic waves as well as Sezawa-type and Love-type modes, delivering rich information on the elastic response of the film under different straining modes. The resulting inverse problem, which means the calculation of the elastic constants from the TGS maps, is subsequently solved using the Ritz-Rayleigh numerical method. Using this approach, tetragonal elastic constants of the NiTi film and their changes with the austenite→martensite phase transition are analyzed.
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Affiliation(s)
- Tomáš Grabec
- Institute of Thermomechanics, Czech Academy of Sciences, Dolejškova 5, 182 00 Prague, Czechia.
| | - Zuzana Soudná
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Trojanova 13, 120 00 Prague, Czechia
| | - Kristýna Repček
- Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Trojanova 13, 120 00 Prague, Czechia
| | - Klara Lünser
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Sebastian Fähler
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstraße 400, 01328 Dresden, Germany
| | - Pavla Stoklasová
- Institute of Thermomechanics, Czech Academy of Sciences, Dolejškova 5, 182 00 Prague, Czechia
| | - Petr Sedlák
- Institute of Thermomechanics, Czech Academy of Sciences, Dolejškova 5, 182 00 Prague, Czechia
| | - Hanuš Seiner
- Institute of Thermomechanics, Czech Academy of Sciences, Dolejškova 5, 182 00 Prague, Czechia
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3
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Florez O, Arregui G, Albrechtsen M, Ng RC, Gomis-Bresco J, Stobbe S, Sotomayor-Torres CM, García PD. Engineering nanoscale hypersonic phonon transport. NATURE NANOTECHNOLOGY 2022; 17:947-951. [PMID: 35941289 DOI: 10.1038/s41565-022-01178-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 06/14/2022] [Indexed: 06/15/2023]
Abstract
Controlling vibrations in solids is crucial to tailor their elastic properties and interaction with light. Thermal vibrations represent a source of noise and dephasing for many physical processes at the quantum level. One strategy to avoid these vibrations is to structure a solid such that it possesses a phononic stop band, that is, a frequency range over which there are no available elastic waves. Here we demonstrate the complete absence of thermal vibrations in a nanostructured silicon membrane at room temperature over a broad spectral window, with a 5.3-GHz-wide bandgap centred at 8.4 GHz. By constructing a line-defect waveguide, we directly measure gigahertz guided modes without any external excitation using Brillouin light scattering spectroscopy. Our experimental results show that the shamrock crystal geometry can be used as an efficient platform for phonon manipulation with possible applications in optomechanics and signal processing transduction.
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Affiliation(s)
- O Florez
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Barcelona, Spain.
- Departament de Física, Universitat Autònoma de Barcelona, Bellaterra, Spain.
| | - G Arregui
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Barcelona, Spain
| | - M Albrechtsen
- Department of Electrical and Photonics Engineering, DTU Electro, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - R C Ng
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Barcelona, Spain
| | - J Gomis-Bresco
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Barcelona, Spain
| | - S Stobbe
- Department of Electrical and Photonics Engineering, DTU Electro, Technical University of Denmark, Kgs. Lyngby, Denmark
- NanoPhoton - Center for Nanophotonics, Technical University of Denmark, Kgs. Lyngby, Denmark
| | - C M Sotomayor-Torres
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Barcelona, Spain
- ICREA - Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
| | - P D García
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Barcelona, Spain.
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4
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Xin B, Ekström E, Shih YT, Huang L, Lu J, Elsukova A, Zhang Y, Zhu W, Borca-Tasciuc T, Ramanath G, Le Febvrier A, Paul B, Eklund P. Engineering thermoelectric and mechanical properties by nanoporosity in calcium cobaltate films from reactions of Ca(OH) 2/Co 3O 4 multilayers. NANOSCALE ADVANCES 2022; 4:3353-3361. [PMID: 36131711 PMCID: PMC9416876 DOI: 10.1039/d2na00278g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 07/04/2022] [Indexed: 05/16/2023]
Abstract
Controlling nanoporosity to favorably alter multiple properties in layered crystalline inorganic thin films is a challenge. Here, we demonstrate that the thermoelectric and mechanical properties of Ca3Co4O9 films can be engineered through nanoporosity control by annealing multiple Ca(OH)2/Co3O4 reactant bilayers with characteristic bilayer thicknesses (b t ). Our results show that doubling b t , e.g., from 12 to 26 nm, more than triples the average pore size from ∼120 nm to ∼400 nm and increases the pore fraction from 3% to 17.1%. The higher porosity film exhibits not only a 50% higher electrical conductivity of σ ∼ 90 S cm-1 and a high Seebeck coefficient of α ∼ 135 μV K-1, but also a thermal conductivity as low as κ ∼ 0.87 W m-1 K-1. The nanoporous Ca3Co4O9 films exhibit greater mechanical compliance and resilience to bending than the bulk. These results indicate that annealing reactant multilayers with controlled thicknesses is an attractive way to engineer nanoporosity and realize mechanically flexible oxide-based thermoelectric materials.
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Affiliation(s)
- Binbin Xin
- Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-58183 Linköping Sweden
| | - Erik Ekström
- Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-58183 Linköping Sweden
| | - Yueh-Ting Shih
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute Troy New York 12180 USA
| | - Liping Huang
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute Troy New York 12180 USA
| | - Jun Lu
- Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-58183 Linköping Sweden
| | - Anna Elsukova
- Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-58183 Linköping Sweden
| | - Yun Zhang
- Rensselaer Polytechnic Institute, Department of Mechanical, Aerospace, and Nuclear Engineering Troy NY 12180 USA
| | - Wenkai Zhu
- Rensselaer Polytechnic Institute, Department of Mechanical, Aerospace, and Nuclear Engineering Troy NY 12180 USA
| | - Theodorian Borca-Tasciuc
- Rensselaer Polytechnic Institute, Department of Mechanical, Aerospace, and Nuclear Engineering Troy NY 12180 USA
| | - Ganpati Ramanath
- Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-58183 Linköping Sweden
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute Troy New York 12180 USA
| | - Arnaud Le Febvrier
- Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-58183 Linköping Sweden
| | - Biplab Paul
- Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-58183 Linköping Sweden
| | - Per Eklund
- Thin Film Physics Division, Department of Physics, Chemistry and Biology (IFM), Linköping University SE-58183 Linköping Sweden
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5
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Kojima S. 100th Anniversary of Brillouin Scattering: Impact on Materials Science. MATERIALS 2022; 15:ma15103518. [PMID: 35629540 PMCID: PMC9143746 DOI: 10.3390/ma15103518] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/07/2022] [Accepted: 05/11/2022] [Indexed: 12/10/2022]
Abstract
L. Brillouin predicted inelastic light scattering by thermally excited sound waves in 1922. Brillouin scattering is a non-contact and non-destructive method to measure sound velocity and attenuation. It is possible to investigate the elastic properties of gases, liquids, glasses, and crystals. Various kinds of phase transitions, i.e., liquid–glass transitions, crystallization, polymorphism, and denaturation have been studied by changing the temperature, pressure, time, and external fields such as the electric, magnetic, and stress fields. Nowadays, Brillouin scattering is extensively used to measure various elementary excitations and quasi-elastic scattering in the gigahertz range between 0.1 and 1000 GHz. A brief history, spectroscopic methods, and Brillouin scattering studies in materials science on ferroelectric materials, glasses, and proteins are reviewed.
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Affiliation(s)
- Seiji Kojima
- Division of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan
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6
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Zajaczkowska H, Veith L, Waliszewski W, Bartkiewicz MA, Borkowski M, Sleczkowski P, Ulanski J, Graczykowski B, Blom PWM, Pisula W, Marszalek T. Self-Aligned Bilayers for Flexible Free-Standing Organic Field-Effect Transistors. ACS APPLIED MATERIALS & INTERFACES 2021; 13:59012-59022. [PMID: 34866376 PMCID: PMC8678985 DOI: 10.1021/acsami.1c15208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Free-standing and flexible field-effect transistors based on 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene)/polystyrene bilayers are obtained by well-controlled phase separation of both components. The phase separation is induced by solvent vapor annealing of initially amorphous blend films, leading to crystallization of TIPS-pentacene as the top layer. The crystallinity and blend morphology strongly depend on the molecular weight of polystyrene, and under optimized conditions, distinct phase separation with a well-defined and trap-free interface between both fractions is achieved. Due to the distinct bilayer morphology, the resulting flexible field-effect transistors reveal similar charge carrier mobilities as rigid devices and additionally pronounced environmental and bias stress stabilities. The performance of the flexible transistors remains stable up to a strain of 1.8%, while above this deformation, a close relation between current and strain is observed that is required for applications in strain sensors.
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Affiliation(s)
- Hanna Zajaczkowska
- Department
of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Lothar Veith
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Witold Waliszewski
- Department
of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Malgorzata A. Bartkiewicz
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Faculty
of Physics, Adam Mickiewicz University, Uniwersytetu Poznanskiego 2, 61-614 Poznan, Poland
| | - Michal Borkowski
- Department
of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Piotr Sleczkowski
- Department
of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Jacek Ulanski
- Department
of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
| | - Bartlomiej Graczykowski
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
- Faculty
of Physics, Adam Mickiewicz University, Uniwersytetu Poznanskiego 2, 61-614 Poznan, Poland
| | - Paul W. M. Blom
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Wojciech Pisula
- Department
of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Tomasz Marszalek
- Department
of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, 90-924 Lodz, Poland
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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7
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Rioboó RJJ, Gontán N, Sanderson D, Desco M, Gómez-Gaviro MV. Brillouin Spectroscopy: From Biomedical Research to New Generation Pathology Diagnosis. Int J Mol Sci 2021; 22:8055. [PMID: 34360822 PMCID: PMC8347166 DOI: 10.3390/ijms22158055] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 07/11/2021] [Accepted: 07/23/2021] [Indexed: 01/06/2023] Open
Abstract
Brillouin spectroscopy has recently gained considerable interest within the biomedical field as an innovative tool to study mechanical properties in biology. The Brillouin effect is based on the inelastic scattering of photons caused by their interaction with thermodynamically driven acoustic modes or phonons and it is highly dependent on the material's elasticity. Therefore, Brillouin is a contactless, label-free optic approach to elastic and viscoelastic analysis that has enabled unprecedented analysis of ex vivo and in vivo mechanical behavior of several tissues with a micrometric resolution, paving the way to a promising future in clinical diagnosis. Here, we comprehensively review the different studies of this fast-moving field that have been performed up to date to provide a quick guide of the current literature. In addition, we offer a general view of Brillouin's biomedical potential to encourage its further development to reach its implementation as a feasible, cost-effective pathology diagnostic tool.
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Affiliation(s)
- Rafael J. Jiménez Rioboó
- Instituto de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), C/Sor Juana Inés de la Cruz, 3, 28049 Madrid, Spain;
| | - Nuria Gontán
- Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain; (N.G.); (D.S.)
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III, 28911 Madrid, Spain
| | - Daniel Sanderson
- Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain; (N.G.); (D.S.)
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III, 28911 Madrid, Spain
| | - Manuel Desco
- Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain; (N.G.); (D.S.)
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III, 28911 Madrid, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), 28029 Madrid, Spain
- Centro Nacional de Investigaciones Cardiovasculares Carlos III, 28029 Madrid, Spain
| | - Maria Victoria Gómez-Gaviro
- Instituto de Investigación Sanitaria Gregorio Marañón, 28007 Madrid, Spain; (N.G.); (D.S.)
- Departamento de Bioingeniería e Ingeniería Aeroespacial, Universidad Carlos III, 28911 Madrid, Spain
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8
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Babacic V, Saleta Reig D, Varghese S, Vasileiadis T, Coy E, Tielrooij KJ, Graczykowski B. Thickness-Dependent Elastic Softening of Few-Layer Free-Standing MoSe 2. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2008614. [PMID: 33938047 DOI: 10.1002/adma.202008614] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Revised: 03/16/2021] [Indexed: 05/07/2023]
Abstract
Few-layer van der Waals (vdW) materials have been extensively investigated in terms of their exceptional electronic, optoelectronic, optical, and thermal properties. Simultaneously, a complete evaluation of their mechanical properties remains an undeniable challenge due to the small lateral sizes of samples and the limitations of experimental tools. In particular, there is no systematic experimental study providing unambiguous evidence on whether the reduction of vdW thickness down to few layers results in elastic softening or stiffening with respect to the bulk. In this work, micro-Brillouin light scattering is employed to investigate the anisotropic elastic properties of single-crystal free-standing 2H-MoSe2 as a function of thickness, down to three molecular layers. The so-called elastic size effect, that is, significant and systematic elastic softening of the material with decreasing numbers of layers is reported. In addition, this approach allows for a complete mechanical examination of few-layer membranes, that is, their elasticity, residual stress, and thickness, which can be easily extended to other vdW materials. The presented results shed new light on the ongoing debate on the elastic size-effect and are relevant for performance and durability of implementation of vdW materials as resonators, optoelectronic, and thermoelectric devices.
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Affiliation(s)
- Visnja Babacic
- Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznanskiego 2, Poznan, 61-614, Poland
| | - David Saleta Reig
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, 08193, Spain
| | - Sebin Varghese
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, 08193, Spain
| | - Thomas Vasileiadis
- Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznanskiego 2, Poznan, 61-614, Poland
| | - Emerson Coy
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, Poznan, 61-614, Poland
| | - Klaas-Jan Tielrooij
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona, 08193, Spain
| | - Bartlomiej Graczykowski
- Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznanskiego 2, Poznan, 61-614, Poland
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
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9
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Nolan P, Auer S, Spehar A, Oplatowska-Stachowiak M, Campbell K. Evaluation of Mass Sensitive Micro-Array biosensors for their feasibility in multiplex detection of low molecular weight toxins using mycotoxins as model compounds. Talanta 2020; 222:121521. [PMID: 33167231 DOI: 10.1016/j.talanta.2020.121521] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 08/03/2020] [Accepted: 08/05/2020] [Indexed: 12/22/2022]
Abstract
Mycotoxins produced by Fusarium species including trichothecenes, zearalenone and fumonisins, can co-contaminate food and feed throughout the supply chain, including cereal grains and animal feeds. There is an increasing demand to enhance global food security by improving the monitoring of mycotoxins throughout our food supply chain. For time and cost-efficient analysis, rapid tests capable of detecting multiple toxins from a single sample are ideal. Considering these current trends in mycotoxin testing, this project examined the feasibility of using both a portable and non-portable mass-based biosensor for multiplex mycotoxin detection. The biosensor was a mass sensitive microarray (MSMA) which consisted of 4 × 16 miniaturized mass sensitive transducer pixels based on solidly mounted resonator (SMR) technology. Functionalisation of individual pixels on the sensor surface using nano-spotting technology for the simultaneous and semi-quantitative detection of three regulated mycotoxins: T2-toxin (T2) zearalenone (ZEN), and fumonisin B1 (FumB1) was examined. With the integration of portable and non-portable microfluidic devices for antibody and standard sample injections, competitive inhibition assays were developed followed by singleplex and multiplex calibration curves. The characteristics and performance of the MSMA were evaluated including sensitivity which was determined as the concentration causing 50% inhibition. Sensitivity of singleplex assays using the portable microfluidic device (PMD) were 1.3 ng/ml, 2.0 ng/ml and 6.8 ng/ml for T2, FumB1 and ZEN, respectively. Sensitivity of the multiplex assay again using the PMD was 6.1 ng/ml, 3.6 ng/ml and 2.4 ng/ml for T2, FumB1 and ZEN, respectively. The PMD was an easy to use and highly sensitive screening tool which has been demonstrated for the multiplex detection of three regulated mycotoxins. Analysis was in real time and results were fully digital. Since detection of analytes was by mass it was both a label-free and cost-efficient method proposed method of analysis for mycotoxins.
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Affiliation(s)
- P Nolan
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast, UK, BT9 5DL
| | - S Auer
- BioMensio Limited, Hermiankatu 6-8H, 33720, Tampere, Finland
| | - A Spehar
- BioMensio Limited, Hermiankatu 6-8H, 33720, Tampere, Finland
| | - M Oplatowska-Stachowiak
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast, UK, BT9 5DL
| | - K Campbell
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast, UK, BT9 5DL.
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10
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Andalouci A, Roussigné Y, Farhat S, Chérif SM. Low frequency vibrations observed on assemblies of vertical multiwall carbon nanotubes by Brillouin light scattering: determination of the Young modulus. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2020; 32:455701. [PMID: 32640433 DOI: 10.1088/1361-648x/aba3ee] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Assemblies of vertical multiwall carbon nanotubes, (VCNTs), have been synthesized by coupling dewetting of cobalt or nickel ultrathin layers and plasma enhanced chemical vapor deposition. Electronic microscopies revealed well defined micrometer length nanotubes with inner radius of 3-4 nm and outer radius of 8-9 nm. Similar structural qualities have been revealed by Raman measurements. Dynamic behaviour of these VCNTs assemblies have been studied by means of Brillouin light scattering technique. The measured inelastic light scattering from VCNTs is attributed to bending vibrations of the nanotubes. The observed frequencies on both assemblies, considered as dense effective media, are compatible with an effective Young modulus of 850 GPa.
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Affiliation(s)
- Ahmed Andalouci
- Université Sorbonne Paris Nord, LSPM, CNRS, UPR 3407, F-93430, Villetaneuse, France
| | - Yves Roussigné
- Université Sorbonne Paris Nord, LSPM, CNRS, UPR 3407, F-93430, Villetaneuse, France
| | - Samir Farhat
- Université Sorbonne Paris Nord, LSPM, CNRS, UPR 3407, F-93430, Villetaneuse, France
| | - Salim Mourad Chérif
- Université Sorbonne Paris Nord, LSPM, CNRS, UPR 3407, F-93430, Villetaneuse, France
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11
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Caponi S, Fioretto D, Mattarelli M. On the actual spatial resolution of Brillouin Imaging. OPTICS LETTERS 2020; 45:1063-1066. [PMID: 32108770 DOI: 10.1364/ol.385072] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 01/15/2020] [Indexed: 06/10/2023]
Abstract
Brillouin imaging is an emerging optical elastography technique that is able to generate maps of the mechanical properties at microscale with great potential in biophysical and biomedical fields. A key parameter is its spatial resolution, which is usually identified with that of the confocal microscope coupled to the Brillouin interferometer. Conversely, here we demonstrate that the mean free path of acoustic phonons plays a major role in defining the resolution, especially for high numerical aperture confocal setups. Surprisingly, the resolution of elastography maps may even deteriorate when decreasing the scattering volume.
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12
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Reed BW, Williams DR, Moser BP, Koski KJ. Chemically Tuning Quantized Acoustic Phonons in 2D Layered MoO 3 Nanoribbons. NANO LETTERS 2019; 19:4406-4412. [PMID: 31184912 DOI: 10.1021/acs.nanolett.9b01068] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Molybdenum trioxide (α-MoO3) is a 2D layered metal oxide that can be altered in color from transparent white to dark blue with reversible intercalation of zerovalent metals, and whose mechanical properties can be controlled through intercalation. Here, we use Brillouin laser light spectroscopy to map the entire angular dispersion curves of multiple acoustic phonon branches of 2D layered MoO3, directly probing the effects of phonon quantum confinement when the phonon wavelength is comparable to the material thickness. Since acoustic phonons dictate elasticity, we thereby determine the full elastic stiffness tensor and the thickness of each nanoribbon to a statistical precision (derived from standard error propagation) corresponding to less than a monolayer. We show how intercalation of metallic Sn, Co, and Cu can chemically tune the quantized acoustic phonons and elasticity of MoO3 nanoribbons. This work provides the methodology to extract precise elastic constants from complex Brillouin scattering of 2D materials, taking advantage of phonon confinement to capture the complete elastic response with a single scattering geometry.
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Affiliation(s)
- Bryan W Reed
- Integrated Dynamic Electron Solutions , Pleasanton , California 94588 , United States
| | - Daniel R Williams
- Department of Chemistry , University of California Davis , Davis , California 95616 , United States
| | - Bryan P Moser
- Department of Chemistry , University of California Davis , Davis , California 95616 , United States
| | - Kristie J Koski
- Department of Chemistry , University of California Davis , Davis , California 95616 , United States
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Dadoenkova Y, Dadoenkova N, Krawczyk M, Lyubchanskii I. Goos-Hänchen effect for Brillouin light scattering by acoustic phonons. OPTICS LETTERS 2018; 43:3965-3968. [PMID: 30106927 DOI: 10.1364/ol.43.003965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 07/11/2018] [Indexed: 06/08/2023]
Abstract
The lateral shift of an optical beam undergoing Brillouin light scattering on an acoustic wave (AW) in the total internal reflection geometry is studied theoretically. It is shown that the lateral shift depends on polarization (longitudinal or transversal) of the AW, as well as on the type of scattering process: a direct one, when the scattered wave undergoes a lateral shift at reflection from the interface, or a cascading one, when a fundamental frequency light beam is laterally shifted at reflection and then scattered on the AW.
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