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Photochromic TiO 2/PEGDA organogels. Photochem Photobiol Sci 2022; 21:545-555. [PMID: 35195890 DOI: 10.1007/s43630-022-00183-6] [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: 11/02/2021] [Accepted: 01/31/2022] [Indexed: 10/19/2022]
Abstract
Photochromic materials can be used for modulation of the visible and infrared light transmittance for providing privacy or energy saving by blocking the heat. Titanium dioxide (TiO2) nanoparticles has been well reported as a promising photochromic material. However, a high photochromic response from TiO2 can be observed only when the nanoparticles are dispersed in a strong photogenerated hole scavenger at a liquid state, but polymer composites are less responsive due to lack of hole scavenging capability. However, it is intricate to apply suspensions in real window devices because of possible leaking. Here, we describe the preparation of TiO2 quantum dot (QD)-based gels from polyethylene glycol diacrylate (PEGDA), N,N-Dimethylformamide (DMF), and ethanol (EtOH). Photochromic gels with TiO2 contents (1-5 volume%) show performance comparable to their colloidal counterparts with capable of photodarkening within 30 min with a transmittance change ranging from 35.8 to 84.5% at 550 nm. These gels were capable of fully recovering the initial transmittance when not exposed to ultraviolet (UV) light within 3-8 h. The photochromic gel systems with ethanol shows reasonable stability by decreasing in transmittance recovery only by less than 10% in 10 cycles. A potential application for the developed photochromic gels can be photochromic windows.
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2
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Dalloz N, Le VD, Hebert M, Eles B, Flores Figueroa MA, Hubert C, Ma H, Sharma N, Vocanson F, Ayala S, Destouches N. Anti-Counterfeiting White Light Printed Image Multiplexing by Fast Nanosecond Laser Processing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2104054. [PMID: 34648203 DOI: 10.1002/adma.202104054] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/14/2021] [Indexed: 06/13/2023]
Abstract
Passive plasmonic metasurfaces enable image multiplexing by displaying different images when altering the conditions of observation. Under white light, three-image multiplexing with polarization-selective switching has been recently demonstrated using femtosecond-laser-processed random plasmonic metasurfaces. Here, the implementation of image multiplexing is extended, thanks to a color-search algorithm, to various observation modes compatible with naked-eye observation under incoherent white light and to four-image multiplexing under polarized light. The laser-processed random plasmonic metasurfaces enabling image multiplexing exhibit self-organized patterns that can diffract light or induce dichroism through hybridization between the localized surface plasmon resonance of metallic nanoparticles and a lattice resonance. Improved spatial resolution makes the image quality compatible with commercial use in secured documents as well as the processing time and cost thanks to the use of a nanosecond laser. This high-speed and flexible laser process, based on energy-efficient nanoparticle reshaping and self-organization, produces centimeter-scale customized tamper-proof images at low cost, which can serve as overt security features.
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Affiliation(s)
- Nicolas Dalloz
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
- HID Global CID SAS, 33 rue de Verdun, Suresnes, 92100, France
| | - Van Doan Le
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
| | - Mathieu Hebert
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
| | - Balint Eles
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
| | - Manuel A Flores Figueroa
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
| | - Christophe Hubert
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
| | - Hongfeng Ma
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
| | - Nipun Sharma
- HID Global CID SAS, 33 rue de Verdun, Suresnes, 92100, France
| | - Francis Vocanson
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
| | - Stéphane Ayala
- HID Global Switzerland SA, Z.I., Rte Pra-Charbon 27, Granges, FR 1614, Switzerland
| | - Nathalie Destouches
- Laboratoire Hubert Curien UMR 5516, Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, 18 rue Professeur Benoît Lauras, Saint-Etienne, 42000, France
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3
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Kayani ABA, Kuriakose S, Monshipouri M, Khalid FA, Walia S, Sriram S, Bhaskaran M. UV Photochromism in Transition Metal Oxides and Hybrid Materials. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100621. [PMID: 34105241 DOI: 10.1002/smll.202100621] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 03/11/2021] [Indexed: 06/12/2023]
Abstract
Limited levels of UV exposure can be beneficial to the human body. However, the UV radiation present in the atmosphere can be damaging if levels of exposure exceed safe limits which depend on the individual the skin color. Hence, UV photochromic materials that respond to UV light by changing their color are powerful tools to sense radiation safety limits. Photochromic materials comprise either organic materials, inorganic transition metal oxides, or a hybrid combination of both. The photochromic behavior largely relies on charge transfer mechanisms and electronic band structures. These factors can be influenced by the structure and morphology, fabrication, composition, hybridization, and preparation of the photochromic materials, among others. Significant challenges are involved in realizing rapid photochromic change, which is repeatable, reversible with low fatigue, and behaving according to the desired application requirements. These challenges also relate to finding the right synergy between the photochromic materials used, the environment it is being used for, and the objectives that need to be achieved. In this review, the principles and applications of photochromic processes for transition metal oxides and hybrid materials, photocatalytic applications, and the outlook in the context of commercialized sensors in this field are presented.
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Affiliation(s)
- Aminuddin Bin Ahmad Kayani
- Functional Materials and Microsystems Research Group and the Micro Nano Research Facility, RMIT University, Melbourne, Australia
| | - Sruthi Kuriakose
- Functional Materials and Microsystems Research Group and the Micro Nano Research Facility, RMIT University, Melbourne, Australia
| | - Mahta Monshipouri
- Functional Materials and Microsystems Research Group and the Micro Nano Research Facility, RMIT University, Melbourne, Australia
| | | | - Sumeet Walia
- Functional Materials and Microsystems Research Group and the Micro Nano Research Facility, RMIT University, Melbourne, Australia
- School of Engineering, RMIT University, Melbourne, Australia
| | - Sharath Sriram
- Functional Materials and Microsystems Research Group and the Micro Nano Research Facility, RMIT University, Melbourne, Australia
| | - Madhu Bhaskaran
- Functional Materials and Microsystems Research Group and the Micro Nano Research Facility, RMIT University, Melbourne, Australia
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4
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Fully Reversible Electrically Induced Photochromic-Like Behaviour of Ag:TiO2 Thin Films. COATINGS 2020. [DOI: 10.3390/coatings10020130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
A TiO2 thin film, prepared on fluorine-doped indium tin oxide (FTO)-coated glass substrate, from commercial off-the-shelf terpinol-based paste, was used to directly adsorb Ag plasmonic nanoparticles capped with polyvinylpyrollidone (PVP) coating. The TiO2 film was sintered before the surface entrapment of Ag nanoparticles. The composite was evaluated in terms of spectroelectrochemical measurements, cyclic voltammetry as well as structural methods such as scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). It was found that the Ag nanoparticles are effectively adsorbed on the TiO2 film, while application of controlled voltages leads to a fully reversible shift of the plasmon peak from 413 nm at oxidation inducing voltages to 440 nm at reducing voltages. This phenomenon allows for the fabrication of a simple photonic switch at either or both wavelengths. The phenomenon of the plasmon shift is due to a combination of plasmon shift related to the form and dielectric environment of the nanoparticles.
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Sharma N, Destouches N, Florian C, Serna R, Siegel J. Tailoring metal-dielectric nanocomposite materials with ultrashort laser pulses for dichroic color control. NANOSCALE 2019; 11:18779-18789. [PMID: 31595926 DOI: 10.1039/c9nr06763a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Metal-dielectric nanocomposites are multiphase material systems containing nanostructures, whose size and arrangement determine the optical properties of the material, enabling the production of new materials with custom-designed response. In this paper, we exploit a femtosecond laser-based strategy to fabricate nanocomposites based on silver nanoparticles (Ag NPs) with tunable optical spectral response. We demonstrate how the spectral response, specifically color and dichroic response, is linked to Ag NPs growth and self-organization processes that are controlled locally by the choice of the laser irradiation parameters, such as scan speed and laser light polarization. When the scan speed increases, the Ag NPs are formed at larger depths below the film surface and give rise to the formation of embedded NPs gratings. As a result, the effective optical properties of the films are strongly modified enabling the display of a broad range of solid colors in the visible region. Furthermore, the choice of the laser light polarization allows to fabricate films either with iridescent or dichroic properties (linear polarization) or with non-diffractive and non-dichroic colors (circular polarization). Finally, the high spatial control over the transformed areas achieved with the laser processing, allows the building of hybrid nanostructures by means of interlacing structures with different optical responses. These results demonstrate the high potential of fs-laser technology to process Ag-based nanocomposites to fabricate coatings with a designed reflectivity, transmission, diffraction, as well as polarization anisotropy response. The Ag nanocomposites investigated in this work hold great promise for a broad range of applications especially for coloring, for enhanced visual effects, and for smart information encoding for security applications.
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Affiliation(s)
- N Sharma
- Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, Laboratoire Hubert Curien UMR 5516, F-42023 Saint-Etienne, France.
| | - N Destouches
- Univ Lyon, UJM-Saint-Etienne, CNRS, Institut d Optique Graduate School, Laboratoire Hubert Curien UMR 5516, F-42023 Saint-Etienne, France.
| | - C Florian
- Laser Processing Group, Instituto de Optica, Consejo Superior de Investigaciones Científicas (IO-CSIC), Serrano 121, 28006 Madrid, Spain.
| | - R Serna
- Laser Processing Group, Instituto de Optica, Consejo Superior de Investigaciones Científicas (IO-CSIC), Serrano 121, 28006 Madrid, Spain.
| | - J Siegel
- Laser Processing Group, Instituto de Optica, Consejo Superior de Investigaciones Científicas (IO-CSIC), Serrano 121, 28006 Madrid, Spain.
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Byeon JH. Scalable hybrid chemical manufacture to photothermal therapy: PEG-capped phototransducers. Sci Rep 2016; 6:31351. [PMID: 27506291 PMCID: PMC4979092 DOI: 10.1038/srep31351] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 07/18/2016] [Indexed: 01/01/2023] Open
Abstract
Ag-TiO2@polyethylene glycol (PEG) nanoparticles were continuously obtained in a single-pass configuration by appropriately reacting freshly flame-synthesized TiO2 with Ag formed in an ultrasonic aqueous medium containing PEG. When the proposed synthesis was kept constant, the production rate for Ag-TiO2@PEG nanoparticles reached approximately 3 g/h while only using a combination of a lab-scale inverse-diffusion flame (16 mm head diameter) and an ultrasonic Ag(I) cell (50 mL). The synthesized nanoparticles were employed as inducers for in vitro photoinduced therapy to kill cancer cells at different light wavelengths. Measurements of the nanoparticle cytotoxicity revealed that PEG incorporation with the Ag-TiO2 particles significantly decreased the cytotoxicity (cell viability of more than ~91% at 200 μg mL(-1) particle concentration) of Ag, and this was comparable with that of TiO2 particles (cell viability of more than ~90%). When 632 nm and 808 nm light was applied to the nanoparticles in the HeLa cells, the viability of the cells was significantly affected [decreased to ~4% (632 nm) and ~26% (808 nm) at 200 μg mL(-1), 5 min irradiation time] by surface plasmon resonance heating and photothermal therapy.
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Affiliation(s)
- Jeong Hoon Byeon
- School of Mechanical Engineering, Yeungnam University,
Gyeongsan
38541, Republic of Korea
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7
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Drobota M, Aflori M, Gradinaru LM, Coroaba A, Butnaru M, Vlad S, Vasilescu DS. Collagen immobilization on ultraviolet light-treated poly(ethylene terephthalate). HIGH PERFORM POLYM 2015. [DOI: 10.1177/0954008315584177] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The present article is focused on the studies regarding the effects of ultraviolet (UV) light on poly(ethylene terephthalate) (PET) films surfaces using scanning electron microscopy (SEM), Fourier transform infrared, X-ray photoelectron spectrometry (XPS), and atomic force microscopy (AFM) measurements, subsequent to collagen immobilization. UV treatment influences the surface energy of polymers as the result of the polymer chain breaking, followed by insertion of oxygen-containing functional groups. Accordingly, after UV light treatment, collagen was adsorbed on the PET surfaces in different proportions. Significant changes in the surface topography appeared after collagen immobilization on UV-treated PET films, and they were put in evidence by SEM and tapping-mode AFM experiments. XPS measurements demonstrated the adsorption of collagen on PET UV light-altered surfaces by increasing of nitrogen content. The cytocompatibility tests using stem cells have shown good results for all treated polymers.
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Affiliation(s)
- Mioara Drobota
- “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
- University Politehnica of Bucharest, Bucharest, Romania
| | - Magdalena Aflori
- “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
| | | | - Adina Coroaba
- “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
| | - Maria Butnaru
- Faculty of Medicine, University of Medicine and Pharmacy, Iasi, Romania
| | - Stelian Vlad
- “Petru Poni” Institute of Macromolecular Chemistry, Iasi, Romania
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Maleki B, Baghayeri M, Vahdat SM, Mohammadzadeh A, Akhoondi S. Ag@TiO2 nanocomposite; synthesis, characterization and its application as a novel and recyclable catalyst for the one-pot synthesis of benzoxazole derivatives in aqueous media. RSC Adv 2015. [DOI: 10.1039/c5ra06618b] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A Ag@TiO2 nanocomposite/water as a novel catalytic system is used for the synthesis of benzoxazole derivatives. A shorter reaction time along with high product yield, catalyst stability and recyclability are the merits of this novel protocol.
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Affiliation(s)
- Behrooz Maleki
- Department of Chemistry
- Hakim Sabzevari University
- Sabzevar 96179-76487
- Iran
| | - Mehdi Baghayeri
- Department of Chemistry
- Hakim Sabzevari University
- Sabzevar 96179-76487
- Iran
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9
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Tricot F, Vocanson F, Chaussy D, Beneventi D, Party M, Destouches N. Flexible photochromic Ag:TiO2 thin films fabricated by ink-jet and flexography printing processes. RSC Adv 2015. [DOI: 10.1039/c5ra18484c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Printing techniques compatible with industrial production are successfully used to fabricate photochromic Ag:TiO2 thin films on a plastic substrate.
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Affiliation(s)
- F. Tricot
- University of Lyon
- F-42023 Saint Etienne
- France
- CNRS UMR 5516
- Laboratoire Hubert Curien
| | - F. Vocanson
- University of Lyon
- F-42023 Saint Etienne
- France
- CNRS UMR 5516
- Laboratoire Hubert Curien
| | - D. Chaussy
- Univ. Grenoble Alpes
- LGP2
- F-38000 Grenoble
- France
- CNRS
| | - D. Beneventi
- Univ. Grenoble Alpes
- LGP2
- F-38000 Grenoble
- France
- CNRS
| | - M. Party
- Univ. Grenoble Alpes
- LGP2
- F-38000 Grenoble
- France
- CNRS
| | - N. Destouches
- University of Lyon
- F-42023 Saint Etienne
- France
- CNRS UMR 5516
- Laboratoire Hubert Curien
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