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Florencia Tebele M, Paris G, Zelcer A. Plasmonic inhibition of bacterial adhesion on gold-decorated mesoporous zirconium oxide thin films. Colloids Surf B Biointerfaces 2023; 232:113576. [PMID: 37862951 DOI: 10.1016/j.colsurfb.2023.113576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 08/22/2023] [Accepted: 09/30/2023] [Indexed: 10/22/2023]
Abstract
Preventing bacterial development on surfaces is essential to avoid problems caused by biofouling. Surfaces decorated with gold nanoparticles have been shown to thermally kill bacteria under high-intensity NIR illumination. In this study, we evaluated the colonization by E. coli of nanostructured surfaces composed of mesoporous zirconia thin films, both with and without gold nanoparticles embedded into the pores. We studied the effect of the nanostructure and of low intensity visible light excitation of the gold nanoparticles on the colonization process. We found that neither the zirconia, nor the presence of pores, or even gold nanoparticles affect bacterial adhesion compared to the bare glass substrate. Therefore, mesoporous zirconia thin films are biologically inert scaffolds that enable the construction of robust surfaces containing functional nanoparticles that can affect bacterial growth. When the gold containing surfaces are irradiated with light, bacterial adhesion shows a remarkable 96 ± 4% reduction. Our studies revealed that these surfaces affect early colonization steps, prior to biofilm formation, preventing bacterial adhesion without affecting its viability. In contrast to related systems where plasmonic excitation induces membrane damage due to strong local heating, the membrane integrity is preserved, showing that these surfaces have a different working principle.
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Affiliation(s)
- M Florencia Tebele
- CIBION-CONICET, Godoy Cruz 2390, C1425FQD Ciudad de Buenos Aires, Argentina.
| | - Gastón Paris
- CIBION-CONICET, Godoy Cruz 2390, C1425FQD Ciudad de Buenos Aires, Argentina
| | - Andrés Zelcer
- CIBION-CONICET, Godoy Cruz 2390, C1425FQD Ciudad de Buenos Aires, Argentina.
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Cardozo de Oliveira E, Xiang C, Esmann M, Lopez Abdala N, Fuertes M, Bruchhausen A, Pastoriza H, Perrin B, Soler-Illia G, Lanzillotti-Kimura N. Probing gigahertz coherent acoustic phonons in TiO 2 mesoporous thin films. Photoacoustics 2023; 30:100472. [PMID: 36950519 PMCID: PMC10026033 DOI: 10.1016/j.pacs.2023.100472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/28/2023] [Accepted: 03/01/2023] [Indexed: 06/18/2023]
Abstract
Ultrahigh-frequency acoustic-phonon resonators usually require atomically flat interfaces to avoid phonon scattering and dephasing, leading to expensive fabrication processes, such as molecular beam epitaxy. Mesoporous thin films are based on inexpensive wet chemical fabrication techniques that lead to relatively flat interfaces regardless the presence of nanopores. Here, we report mesoporous titanium dioxide-based acoustic resonators with resonances up to 90 GHz, and quality factors from 3 to 7. Numerical simulations show a good agreement with the picosecond ultrasonics experiments. We also numerically study the effect of changes in the speed of sound on the performance of the resonator. This change could be induced by liquid infiltration into the mesopores. Our findings constitute the first step towards the engineering of building blocks based on mesoporous thin films for reconfigurable optoacoustic sensors.
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Affiliation(s)
- E.R. Cardozo de Oliveira
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France
| | - C. Xiang
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France
| | - M. Esmann
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France
- Institute for Physics, Carl von Ossietzky University of Oldenburg, 26129 Oldenburg, Germany
| | - N. Lopez Abdala
- Instituto de Nanosistemas, Escuela de Bio y Nanotecnologías, Universidad Nacional de San Martín-CONICET, Buenos Aires, Argentina
| | - M.C. Fuertes
- Gerencia Química, Inst. de Nanociencia y Nanotecnología, CNEA-CONICET, Buenos Aires, Argentina
| | - A. Bruchhausen
- Centro Atómico Bariloche, Inst. de Nanociencia y Nanotecnología, CNEA-CONICET, Rio Negro, Argentina
| | - H. Pastoriza
- Centro Atómico Bariloche, Inst. de Nanociencia y Nanotecnología, CNEA-CONICET, Rio Negro, Argentina
| | - B. Perrin
- Sorbonne Université, CNRS, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France
| | - G.J.A.A. Soler-Illia
- Instituto de Nanosistemas, Escuela de Bio y Nanotecnologías, Universidad Nacional de San Martín-CONICET, Buenos Aires, Argentina
| | - N.D. Lanzillotti-Kimura
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France
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Brites CDS, Fuertes MC, Angelomé PC, Martínez ED, Lima PP, Soler-Illia GJAA, Carlos LD. Tethering Luminescent Thermometry and Plasmonics: Light Manipulation to Assess Real-Time Thermal Flow in Nanoarchitectures. Nano Lett 2017; 17:4746-4752. [PMID: 28686837 DOI: 10.1021/acs.nanolett.7b01433] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The past decade has seen significant progresses in the ability to fabricate new mesoporous thin films with highly controlled pore systems and emerging applications in sensing, electrical and thermal isolation, microfluidics, solar cells engineering, energy storage, and catalysis. Heat management at the micro- and nanoscale is a key issue in most of these applications, requiring a complete thermal characterization of the films that is commonly performed using electrical methods. Here, plasmonic-induced heating (through Au NPs) is combined with Tb3+/Eu3+ luminescence thermometry to measure the thermal conductivity of silica and titania mesoporous nanolayers. This innovative method yields values in accord with those measured by the evasive and destructive conventional 3ω-electrical method, simultaneously overcoming their main limitations, for example, a mandatory deposition of additional isolating and metal layers over the films and the previous knowledge of the thermal contact resistance between the heating and the mesoporous layers.
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Affiliation(s)
- Carlos D S Brites
- Departamento de Física and CICECO - Aveiro Institute of Materials, Universidade de Aveiro , Campus Santiago, 3810-193 Aveiro, Portugal
| | - Maria Cecilia Fuertes
- Gerencia Química, CNEA, CONICET , Avenido Gral. Paz 1499 (B1650KNA) San Martín, Buenos Aires, Argentina
- Instituto Sabato, UNSAM, CNEA , Avenido Gral. Paz 1499 (B1650KNA) San Martín, Buenos Aires, Argentina
| | - Paula C Angelomé
- Gerencia Química, CNEA, CONICET , Avenido Gral. Paz 1499 (B1650KNA) San Martín, Buenos Aires, Argentina
| | - Eduardo D Martínez
- Gerencia Química, CNEA, CONICET , Avenido Gral. Paz 1499 (B1650KNA) San Martín, Buenos Aires, Argentina
| | - Patrícia P Lima
- Departamento de Física and CICECO - Aveiro Institute of Materials, Universidade de Aveiro , Campus Santiago, 3810-193 Aveiro, Portugal
| | | | - Luís D Carlos
- Departamento de Física and CICECO - Aveiro Institute of Materials, Universidade de Aveiro , Campus Santiago, 3810-193 Aveiro, Portugal
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