The Impact of Nanoparticles on Previtreous Behavior: Glass-Forming Nematogenic E7 Mixture-Based Nanocolloids.
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| Title: | The Impact of Nanoparticles on Previtreous Behavior: Glass-Forming Nematogenic E7 Mixture-Based Nanocolloids. |
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| Authors: | Drozd-Rzoska, Aleksandra1 (AUTHOR), Łoś, Joanna1 (AUTHOR), Rzoska, Sylwester J.1 (AUTHOR) sylwester.rzoska@gmail.com |
| Source: | Nanomaterials (2079-4991). Apr2025, Vol. 15 Issue 8, p597. 23p. |
| Subjects: | First-order phase transitions, Broadband dielectric spectroscopy, Electric conductivity, Phase transitions, Glass transitions |
| Abstract: | This report discusses the impact of nanoparticles on glass-forming systems composed of a liquid crystalline (LC) mixture E7 and paraelectric BaTiO3 particles ( d ≈ 50 n m , globular), tested via broadband dielectric spectroscopy. In the isotropic phase, critical changes in the dielectric constant are shown. They are related to the weakly discontinuous nature of the isotropic–nematic transition. In the nematic phase, two primary relaxation times/processes and DC electric conductivity are considered, down to the glass temperature T g . The prevalence of portrayals via the 'double exponential' MYEGA equation and the critical & activated Drozd-Rzoska relation for dynamic properties are shown. For the primary loss curve, critical-like changes of its maximum (peak) are evidenced: ε p e a k ″ ∝ 1 / T − T g * for T g < T < T g + 25 K , where T g * < T g denotes the extrapolated singular temperature. Dielectric constant monitoring revealed the permanent arrangement of rod-like LC molecules by nanoparticles' endogenic impact in the nematic phase. The heuristic model regarding this unique behavior is presented. It considers a hypothetical link between the glass transition and a hidden near-critical discontinuous phase transition, uniquely avoiding a symmetry change. The uniaxiality of LC molecules enables the detection of critical-like features when approaching the glass transition, hypothetically associated with a specific 'amorphous' phase transition. [ABSTRACT FROM AUTHOR] |
| Copyright of Nanomaterials (2079-4991) is the property of MDPI 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 |
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| Header | DbId: egs DbLabel: Engineering Source An: 184794828 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: The Impact of Nanoparticles on Previtreous Behavior: Glass-Forming Nematogenic E7 Mixture-Based Nanocolloids. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Drozd-Rzoska%2C+Aleksandra%22">Drozd-Rzoska, Aleksandra</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Łoś%2C+Joanna%22">Łoś, Joanna</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Rzoska%2C+Sylwester+J%2E%22">Rzoska, Sylwester J.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sylwester.rzoska@gmail.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Apr2025, Vol. 15 Issue 8, p597. 23p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22First-order+phase+transitions%22">First-order phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Broadband+dielectric+spectroscopy%22">Broadband dielectric spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+transitions%22">Phase transitions</searchLink><br /><searchLink fieldCode="DE" term="%22Glass+transitions%22">Glass transitions</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This report discusses the impact of nanoparticles on glass-forming systems composed of a liquid crystalline (LC) mixture E7 and paraelectric BaTiO3 particles ( d ≈ 50   n m , globular), tested via broadband dielectric spectroscopy. In the isotropic phase, critical changes in the dielectric constant are shown. They are related to the weakly discontinuous nature of the isotropic–nematic transition. In the nematic phase, two primary relaxation times/processes and DC electric conductivity are considered, down to the glass temperature T g . The prevalence of portrayals via the 'double exponential' MYEGA equation and the critical & activated Drozd-Rzoska relation for dynamic properties are shown. For the primary loss curve, critical-like changes of its maximum (peak) are evidenced: ε p e a k ″ ∝ 1 / T − T g * for T g < T < T g + 25   K , where T g * < T g denotes the extrapolated singular temperature. Dielectric constant monitoring revealed the permanent arrangement of rod-like LC molecules by nanoparticles' endogenic impact in the nematic phase. The heuristic model regarding this unique behavior is presented. It considers a hypothetical link between the glass transition and a hidden near-critical discontinuous phase transition, uniquely avoiding a symmetry change. The uniaxiality of LC molecules enables the detection of critical-like features when approaching the glass transition, hypothetically associated with a specific 'amorphous' phase transition. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI 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: 10.3390/nano15080597 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 23 StartPage: 597 Subjects: – SubjectFull: First-order phase transitions Type: general – SubjectFull: Broadband dielectric spectroscopy Type: general – SubjectFull: Electric conductivity Type: general – SubjectFull: Phase transitions Type: general – SubjectFull: Glass transitions Type: general Titles: – TitleFull: The Impact of Nanoparticles on Previtreous Behavior: Glass-Forming Nematogenic E7 Mixture-Based Nanocolloids. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Drozd-Rzoska, Aleksandra – PersonEntity: Name: NameFull: Łoś, Joanna – PersonEntity: Name: NameFull: Rzoska, Sylwester J. IsPartOfRelationships: – BibEntity: Dates: – D: 15 M: 04 Text: Apr2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 20794991 Numbering: – Type: volume Value: 15 – Type: issue Value: 8 Titles: – TitleFull: Nanomaterials (2079-4991) Type: main |
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