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Tuleushev AZ, Harrison FE, Kozlovskiy AL, Zdorovets MV. Insight into What Is inside Swift Heavy Ion Latent Tracks in PET Film. Polymers (Basel) 2023; 15:4050. [PMID: 37896294 PMCID: PMC10610178 DOI: 10.3390/polym15204050] [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: 09/07/2023] [Revised: 10/05/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
We present here a novel experimental study of changes after contact electrification in the optical transmission spectra of samples of both pristine and irradiated PET film treated with Kr+15 ions of energy of 1.75 MeV and a fluence of 3 × 1010 cm2. We used a non-standard electrification scheme for injecting electrons into the film by applying negative electrodes to both its surfaces and using the positively charged inner regions of the film itself as the positive electrode. Electrification led to a decrease in the intensity of the internal electric fields for both samples and a hypsochromic (blue) shift in their spectra. For the irradiated PET sample, electrification resulted in a Gaussian modulation of its optical properties in the photon energy range 2.3-3.6 eV. We associate this Gaussian modulation with the partial decay of non-covalent extended conjugated systems that were formed under the influence of the residual radial electric field of the SHI latent tracks. Our studies lead us to suggest the latent track in the PET film can be considered as a variband material in the radial direction. Consideration of our results along with other published experimental results leads us to conclude that these can all be consistently understood by taking into account both the swift and slow electrons produced by SHI irradiation, and that it appears that the core of a latent track is negatively charged, and the periphery is positively charged.
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Affiliation(s)
- Adil Z. Tuleushev
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan; (A.Z.T.)
| | - Fiona E. Harrison
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan; (A.Z.T.)
| | - Artem L. Kozlovskiy
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan; (A.Z.T.)
- Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan
| | - Maxim V. Zdorovets
- Engineering Profile Laboratory, L.N. Gumilyov Eurasian National University, Astana 010008, Kazakhstan; (A.Z.T.)
- Laboratory of Solid State Physics, The Institute of Nuclear Physics, Almaty 050032, Kazakhstan
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Urbach Rule in the Red-Shifted Absorption Edge of PET Films Irradiated with Swift Heavy Ions. Polymers (Basel) 2022; 14:polym14050923. [PMID: 35267746 PMCID: PMC8912447 DOI: 10.3390/polym14050923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 02/17/2022] [Accepted: 02/23/2022] [Indexed: 11/16/2022] Open
Abstract
This paper presents a new analysis of the experimental transmission spectra of polyethylene terephthalate (PET) films before and after irradiation with swift heavy ions (SHI) films, as reported previously by the authors. It is shown that the absorption edge red shift for irradiated films contains two regions of exponential form, one of which is located in the UV region and the other at lower energy, mainly in the visible part of the spectrum. The behaviour of the transmission curves under different irradiating fluences demonstrates that these two regions reflect respectively the electron-enriched core of the latent track and its electron-depleted peripheral halo. The focal point method yields a bandgap energy of 4.1 eV for the electron-enriched core of the latent track, which is similar to n-doped semiconductors, and a bandgap of about 1.3–1.5 eV for the electron-depleted halo, similar to p-doped semiconductors. The boundary between the latent track cores and halos corresponds to a conventional semiconductor p-n junction. The values of the characteristic Urbach energy determined from experimental data correspond to the nonradiative transition energy between the excited singlet and triplet levels of benzene-carboxyl complexes in repeat units of the PET chain molecule. A parallel is drawn between the SHI-induced redistribution of electrons held in structural traps in the PET film and chemical redox reactions, which involve the redistribution of electrons in chemical bonds. It is suggested that alkali etching triggers the release of excess electrons in the latent track cores, which act as a catalyst for the fragmentation of PET chain molecules along the latent tracks of the SHI irradiation.
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Lucío MI, Montoto AH, Fernández E, Alamri S, Kunze T, Bañuls MJ, Maquieira Á. Label-free detection of C-Reactive protein using bioresponsive hydrogel-based surface relief diffraction gratings. Biosens Bioelectron 2021; 193:113561. [PMID: 34416432 DOI: 10.1016/j.bios.2021.113561] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/13/2021] [Accepted: 08/09/2021] [Indexed: 01/19/2023]
Abstract
Responsive hydrogel-based surface relief gratings have demonstrated great performances as transducers in optical sensing. However, novel and smart designs of hydrogels are needed for the appropriate detection of analytes and biomolecules since the existing materials are very limited to specific molecules. In this work, a biosensing system based on surface relief gratings made of bioresponsive hydrogels has been developed. In particular, the hydrogel contains phosphocholine moieties to specifically recognize C-Reactive protein (CRP). The CRP-Sensing hydrogel capacity to selectively detect CRP was fully demonstrated. Using Direct Laser Interference Patterning, micro-gratings were created on CRP-Sensing hydrogel substrates and applied for the label-free sensing of CRP using a simple laser-based homemade optical setup. Limits of detection (LOD) and quantification (LOQ) in human serum dilutions of 1.07 and 8.92 mg L-1, respectively, were reached. These results demonstrate that the biosensing system allows the selective label-free detection of CRP within concentration ranges around those related to risks of cardiovascular diseases and sepsis. Besides, amplification strategies have been carried out improving the sensitivity, widening the linear range, and reaching better LOD and LOQ (0.30 mg L-1 and 4.36 mg L-1). Finally, all the approaches were tested for the quantification of CRP in certified human serum with recoveries of around 100%.
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Affiliation(s)
- María Isabel Lucío
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Andy Hernández Montoto
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Estrella Fernández
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - Sabri Alamri
- Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS, Winterbergstr. 28, 01277 Dresden, Germany; Fusion Bionic GmbH, Löbtauer Straße 69, 01159 Dresden, Germany
| | - Tim Kunze
- Fraunhofer-Institut für Werkstoff- und Strahltechnik IWS, Winterbergstr. 28, 01277 Dresden, Germany; Fusion Bionic GmbH, Löbtauer Straße 69, 01159 Dresden, Germany
| | - María-José Bañuls
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain; Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain.
| | - Ángel Maquieira
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera s/n, 46022 Valencia, Spain; Departamento de Química, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
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Ion Charge Influence on the Molecular Structure of Polyethylene Terephthalate Films after Irradiation with Swift Heavy Ions. CRYSTALS 2020. [DOI: 10.3390/cryst10060479] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We report here experimental results investigating the influence of the initial swift heavy ion charge on the structure of polyethylene terephthalate (PET) film after irradiation, using a structurally sensitive X-ray diffraction method. Kr ions with an energy of 100 MeV and charges of 13+, 14+, and 15+ were each used at irradiation fluences of 5 × 1010, 7.5 × 1010, 1 × 1011, 2.5 × 1011 and 5 × 1011 ions/cm2. At constant energy and irradiation fluence, the post-irradiation structural changes in PET film show a clear dependence on the initial ion charge. As either the fluence or ion charge increase, the latent tracks begin to overlap, leading to cross-linking of PET chain molecules to form rotational isomers (rotamers). We use the fluence corresponding to the onset of overlapping to estimate the size of latent tracks for different ion charges. At the highest fluences, the latent tracks become entirely overlapped, and the interchain cross-linking extends throughout the whole film. Since this cross-linking is due to the dipole–dipole interaction of subunits of repeat units of PET chain molecules, it is reversible, in contrast to the well-known chemical cross-linking of polymer chain molecules under irradiation.
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Strain-optical behavior of polyethylene terephthalate film during uniaxial stretching investigated by Mueller matrix ellipsometry. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121842] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Saxena D, Soundararajan N, Katiyar V, Rana D, Maiti P. Structural, mechanical, and gas barrier properties of poly(ethylene terephthalate) nanohybrid using nanotalc. J Appl Polym Sci 2019. [DOI: 10.1002/app.48607] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Dipti Saxena
- School of Materials Science and TechnologyIndian Institute of Technology (Banaras Hindu University) Varanasi 221005 India
| | - Narendren Soundararajan
- Department of Chemical EngineeringIndian Institute of Technology Guwahati Guwahati 781039 Assam India
| | - Vimal Katiyar
- Department of Chemical EngineeringIndian Institute of Technology Guwahati Guwahati 781039 Assam India
| | - Dipak Rana
- Industrial Membrane Research Institute, Department of Chemical and Biological EngineeringUniversity of Ottawa 161 Louis Pasteur Street Ottawa Ontario KIN 6N5 Canada
| | - Pralay Maiti
- School of Materials Science and TechnologyIndian Institute of Technology (Banaras Hindu University) Varanasi 221005 India
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Storm S, Alamri S, Soldera M, Kunze T, Lasagni AF. How to Tailor Structural Colors for Extended Visibility and White Light Generation Employing Direct Laser Interference Patterning. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900205] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Sebastian Storm
- Fraunhofer‐Institut für Werkstoff‐ und Strahltechnik IWS Winterbergstr. 28 01277 Dresden Germany
| | - Sabri Alamri
- Fraunhofer‐Institut für Werkstoff‐ und Strahltechnik IWS Winterbergstr. 28 01277 Dresden Germany
| | - Marcos Soldera
- Institut für Fertigungstechnik Technische Universität Dresden George‐Bähr‐Str. 3c 01069 Dresden Germany
- PROBIEN Dto. de Electrotecnia CONICET Universidad Nacional del Comahue Buenos Aires 1400 Q8300 Neuquén Argentina
| | - Tim Kunze
- Fraunhofer‐Institut für Werkstoff‐ und Strahltechnik IWS Winterbergstr. 28 01277 Dresden Germany
| | - Andrés Fabián Lasagni
- Fraunhofer‐Institut für Werkstoff‐ und Strahltechnik IWS Winterbergstr. 28 01277 Dresden Germany
- Institut für Fertigungstechnik Technische Universität Dresden George‐Bähr‐Str. 3c 01069 Dresden Germany
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Darwish AS, Bayaumy FE, Ismail HM. Photoactivated water-disinfecting, and biological properties of Ag NPs@Sm-doped ZnO nanorods/cuttlefish bone composite: In-vitro bactericidal, cercaricidal and schistosomicidal studies. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 93:996-1011. [DOI: 10.1016/j.msec.2018.09.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 07/27/2018] [Accepted: 09/04/2018] [Indexed: 01/31/2023]
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Flores-Camacho JM, Weidlinger G, Sun LD, Schmidegg K, Hohage M, Primetzhofer D, Bauer P, Zeppenfeld P. Growth and optical properties of Ag clusters deposited on poly(ethylene terephthalate). NANOTECHNOLOGY 2011; 22:275710. [PMID: 21597154 DOI: 10.1088/0957-4484/22/27/275710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The growth and concomitant evolution of the optical properties of Ag nano-clusters deposited on biaxially extruded poly(ethylene terephthalate) films is studied by reflectance difference spectroscopy. It is demonstrated by low energy ion scattering and simulated optical spectra that the clusters form a two-dimensional layer buried beneath the surface of the substrate. The experimental spectra are described by simulations in which different configurations of the host such as anisotropy, amorphization, and dilution are considered in an effective medium approach. The contribution of the anisotropic substrate is used to explain the resulting line shapes. We also discuss the role of the rate of change of the filling fraction with Ag coverage in the evolution of the spectra and the detection of the onset of coalescence by optical means.
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Affiliation(s)
- J M Flores-Camacho
- Institut für Experimentalphysik, Johannes Kepler Universität Linz, Altenbergerstraße 69, A-4040 Linz, Austria.
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Ouchi I, Nakai I, Ono M, Kimura S. Features of fluorescence spectra of polyethylene 2,6-naphthalate films. J Appl Polym Sci 2007. [DOI: 10.1002/app.26085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Maekawa Y, Suzuki Y, Maeyama K, Yonezawa N, Yoshida M. Chemical modification of the internal surfaces of cylindrical pores of submicrometer size in poly(ethylene terephthalate). LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:2832-7. [PMID: 16519491 DOI: 10.1021/la051583z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Chemical modification of the internal surfaces of cylindrical pores with submicrometer pore diameter in a poly(ethylene terephthalate) (PET) film was examined. The modification involved the alkylation of the carboxylic acid on the surfaces with the alkylation reagent containing a fluorescent probe, and it was monitored by observing the change in fluorescent emission intensity. When the N,N-dimethylformamide solution of 4-(bromomethyl)-6,7-dimethoxycoumarin (BrCU), which bore a coumarin fluorophore, was introduced into the pores, the emission and excitation intensities of the membranes increased proportionally with increases of the pore surface areas. Fluorescent spots about 300 nm in diameter, which were located at the positions of the pores, can be observed in the fluorescence microscope image of the membranes, indicating that highly concentrated fluorescent probes are chemically incorporated on the internal surfaces of the cylindrical pores with 210 nm diameter in the membranes. In the reactions of the PET surfaces with BrCU, the fluorescent intensities increased with increases of the contact angles. This result indicates that the hydrophilicity of the internal pore surfaces can be qualitatively modified by controlling the change in the fluorescent intensities.
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Affiliation(s)
- Yasunari Maekawa
- Research Group for Conducting Polymer Materials, Quantum Beam Science Directorate, Japan Atomic Energy Agency (JAEA), 1233 Watanuki, Takasaki, Gunma, Japan.
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Maekawa Y, Suzuki Y, Maeyama K, Yonezawa N, Yoshida M. Visualization of Chemical Modification of Pore Internal Surfaces Using Fluorescence Microscopy. CHEM LETT 2004. [DOI: 10.1246/cl.2004.150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Szadkowska-Nicze M, Mayer J. Ionic and excited species in irradiated poly(ethylene terephthalate) doped with pyrene. J Photochem Photobiol A Chem 2003. [DOI: 10.1016/s1010-6030(03)00110-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ouchi I, Miyamura R, Sakaguchi M, Hosaka S, Kitagawa M. Excitation and emission spectra of polyethylene terephthalate and polyethylene 2,6-naphthalate films. POLYM ADVAN TECHNOL 1999. [DOI: 10.1002/(sici)1099-1581(199903)10:3<195::aid-pat875>3.0.co;2-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ouchi I, Nakai I, Kamada M, Tanaka SI, Hagiwara T. Core Electron Absorption Spectra of Poly(ethylene terephthalate) and Poly(ethylene 2,6-naphthalate) Films. Polym J 1995. [DOI: 10.1295/polymj.27.127] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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