Porous polymer films with tunable refractive index.
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| Title: | Porous polymer films with tunable refractive index. |
|---|---|
| Authors: | Lameri, I.1 (AUTHOR), Riccardi, D.2 (AUTHOR), Syed, S.2 (AUTHOR), Viscusi, G.3 (AUTHOR), Sassella, A.1 (AUTHOR), Rizzo, P.1,2 (AUTHOR) prizzo@unisa.it |
| Source: | Polymer. Sep2025, Vol. 335, pN.PAG-N.PAG. 1p. |
| Subjects: | Porous polymers, Optoelectronic devices, Polyphenylene oxide, Optical devices, Microporosity, Opacity (Optics), Polymers |
| Abstract: | A simple, energy efficient, and cost-effective method is presented for the fabrication of polymeric films with a low refractive index in the visible spectral range, suitable as insulators in flexible optical and optoelectronic devices. Thin films based on a commercial polymer with high thermal stability (up to 200 °C), such as poly (2,6-dimethyl-1,4-phenylene) oxide (PPO), presenting both microporosity in the nanoporous crystalline (NC) phases as well as a tunable macroporosity in the amorphous phase, have been prepared and characterized by several techniques. Refractive index of PPO thin films in the visible spectral range, as measured by spectroscopic ellipsometry, varies from a maximum of 1.58 (at 560nm) for fully amorphous samples to a minimum of 1.39 for NC films exhibiting both micro- and macroporosity. This latter value is close to that of polytetrafluoroethylene (PTFE), one of the polymers exhibiting the lowest refractive index value, and has been obtained through a straightforward, very easy and low energy consuming process. [Display omitted] • Production of PPO thin film habing thickness ranging from 1 to 3 μm throughout spin coating procedure. • Modulation of the final structure porosity by easily changing the crystallization conditions. • Wide range of tunability of the refractive index through an easy and low energy consuming process. [ABSTRACT FROM AUTHOR] |
| Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 187747655 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Porous polymer films with tunable refractive index. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Lameri%2C+I%2E%22">Lameri, I.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Riccardi%2C+D%2E%22">Riccardi, D.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Syed%2C+S%2E%22">Syed, S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Viscusi%2C+G%2E%22">Viscusi, G.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sassella%2C+A%2E%22">Sassella, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rizzo%2C+P%2E%22">Rizzo, P.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> prizzo@unisa.it</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Polymer%22">Polymer</searchLink>. Sep2025, Vol. 335, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Porous+polymers%22">Porous polymers</searchLink><br /><searchLink fieldCode="DE" term="%22Optoelectronic+devices%22">Optoelectronic devices</searchLink><br /><searchLink fieldCode="DE" term="%22Polyphenylene+oxide%22">Polyphenylene oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+devices%22">Optical devices</searchLink><br /><searchLink fieldCode="DE" term="%22Microporosity%22">Microporosity</searchLink><br /><searchLink fieldCode="DE" term="%22Opacity+%28Optics%29%22">Opacity (Optics)</searchLink><br /><searchLink fieldCode="DE" term="%22Polymers%22">Polymers</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A simple, energy efficient, and cost-effective method is presented for the fabrication of polymeric films with a low refractive index in the visible spectral range, suitable as insulators in flexible optical and optoelectronic devices. Thin films based on a commercial polymer with high thermal stability (up to 200 °C), such as poly (2,6-dimethyl-1,4-phenylene) oxide (PPO), presenting both microporosity in the nanoporous crystalline (NC) phases as well as a tunable macroporosity in the amorphous phase, have been prepared and characterized by several techniques. Refractive index of PPO thin films in the visible spectral range, as measured by spectroscopic ellipsometry, varies from a maximum of 1.58 (at 560nm) for fully amorphous samples to a minimum of 1.39 for NC films exhibiting both micro- and macroporosity. This latter value is close to that of polytetrafluoroethylene (PTFE), one of the polymers exhibiting the lowest refractive index value, and has been obtained through a straightforward, very easy and low energy consuming process. [Display omitted] • Production of PPO thin film habing thickness ranging from 1 to 3 μm throughout spin coating procedure. • Modulation of the final structure porosity by easily changing the crystallization conditions. • Wide range of tunability of the refractive index through an easy and low energy consuming process. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.polymer.2025.128820 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Porous polymers Type: general – SubjectFull: Optoelectronic devices Type: general – SubjectFull: Polyphenylene oxide Type: general – SubjectFull: Optical devices Type: general – SubjectFull: Microporosity Type: general – SubjectFull: Opacity (Optics) Type: general – SubjectFull: Polymers Type: general Titles: – TitleFull: Porous polymer films with tunable refractive index. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Lameri, I. – PersonEntity: Name: NameFull: Riccardi, D. – PersonEntity: Name: NameFull: Syed, S. – PersonEntity: Name: NameFull: Viscusi, G. – PersonEntity: Name: NameFull: Sassella, A. – PersonEntity: Name: NameFull: Rizzo, P. IsPartOfRelationships: – BibEntity: Dates: – D: 23 M: 09 Text: Sep2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00323861 Numbering: – Type: volume Value: 335 Titles: – TitleFull: Polymer Type: main |
| ResultId | 1 |
