Fabrication and Optical Properties of Transparent P(VDF-TrFE) Ultrathin Films
The films of vinylidene fluoride and trifluoroethylene (P(VDF-TrFE)) are widely used in piezoelectric tactile sensors, vibration energy harvesters, optical frequency conversion materials and organic photo-voltaic devices because of high electroactive, good optical and nonlinear optical properties, r...
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| Format: | Article |
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MDPI AG
2022-02-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/4/588 |
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| author | Yong Liu Wei-Guo Liu Da-Bin Lin Xiao-Ling Niu Shun Zhou Jin Zhang Shao-Bo Ge Ye-Chuan Zhu Xiao Meng Zhi-Li Chen |
| author_facet | Yong Liu Wei-Guo Liu Da-Bin Lin Xiao-Ling Niu Shun Zhou Jin Zhang Shao-Bo Ge Ye-Chuan Zhu Xiao Meng Zhi-Li Chen |
| author_sort | Yong Liu |
| collection | DOAJ |
| description | The films of vinylidene fluoride and trifluoroethylene (P(VDF-TrFE)) are widely used in piezoelectric tactile sensors, vibration energy harvesters, optical frequency conversion materials and organic photo-voltaic devices because of high electroactive, good optical and nonlinear optical properties, respectively. In this work, the multilayer structured ultrathin films were fabricated by the Langmuir–Blodgett technique, and the thickness per layer can be controlled accurately. It was found that as the collapse pressure of P(VDF-TrFE) (25:75) and the optimal dipping value are 60~70 mN/m and 15 mN/m, respectively, a high-density film can be obtained due to the compression of molecules. The surface topography and optical properties of the LB films were characterized by X-ray diffraction, white light interferometer and variable-angle spectrum ellipsometer. It was observed that the films are transparent in the visible region and IR-band, but show a high absorption in the UV band. Besides, the transmittance of the films ranges from 50% to 85% in the visible region, and it linearly decreases with the number of monolayers. The average thickness of per deposition layer is 2.447 nm, 2.688 nm and 2.072 nm, respectively, under three measurement methods. The calculated refractive index ranged from 1.443 to 1.598 (600~650 nm) by the Cauchy-model. |
| first_indexed | 2024-03-09T21:19:29Z |
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| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T21:19:29Z |
| publishDate | 2022-02-01 |
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| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-146047e4ebe34d42969b08c2a8cc46712023-11-23T21:24:55ZengMDPI AGNanomaterials2079-49912022-02-0112458810.3390/nano12040588Fabrication and Optical Properties of Transparent P(VDF-TrFE) Ultrathin FilmsYong Liu0Wei-Guo Liu1Da-Bin Lin2Xiao-Ling Niu3Shun Zhou4Jin Zhang5Shao-Bo Ge6Ye-Chuan Zhu7Xiao Meng8Zhi-Li Chen9Thin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThin Film and Optical Manufacturing Technology, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, ChinaThe films of vinylidene fluoride and trifluoroethylene (P(VDF-TrFE)) are widely used in piezoelectric tactile sensors, vibration energy harvesters, optical frequency conversion materials and organic photo-voltaic devices because of high electroactive, good optical and nonlinear optical properties, respectively. In this work, the multilayer structured ultrathin films were fabricated by the Langmuir–Blodgett technique, and the thickness per layer can be controlled accurately. It was found that as the collapse pressure of P(VDF-TrFE) (25:75) and the optimal dipping value are 60~70 mN/m and 15 mN/m, respectively, a high-density film can be obtained due to the compression of molecules. The surface topography and optical properties of the LB films were characterized by X-ray diffraction, white light interferometer and variable-angle spectrum ellipsometer. It was observed that the films are transparent in the visible region and IR-band, but show a high absorption in the UV band. Besides, the transmittance of the films ranges from 50% to 85% in the visible region, and it linearly decreases with the number of monolayers. The average thickness of per deposition layer is 2.447 nm, 2.688 nm and 2.072 nm, respectively, under three measurement methods. The calculated refractive index ranged from 1.443 to 1.598 (600~650 nm) by the Cauchy-model.https://www.mdpi.com/2079-4991/12/4/588PVDF nano filmsLangmuir-Blodgett (LB)refractive indexoptical constant |
| spellingShingle | Yong Liu Wei-Guo Liu Da-Bin Lin Xiao-Ling Niu Shun Zhou Jin Zhang Shao-Bo Ge Ye-Chuan Zhu Xiao Meng Zhi-Li Chen Fabrication and Optical Properties of Transparent P(VDF-TrFE) Ultrathin Films Nanomaterials PVDF nano films Langmuir-Blodgett (LB) refractive index optical constant |
| title | Fabrication and Optical Properties of Transparent P(VDF-TrFE) Ultrathin Films |
| title_full | Fabrication and Optical Properties of Transparent P(VDF-TrFE) Ultrathin Films |
| title_fullStr | Fabrication and Optical Properties of Transparent P(VDF-TrFE) Ultrathin Films |
| title_full_unstemmed | Fabrication and Optical Properties of Transparent P(VDF-TrFE) Ultrathin Films |
| title_short | Fabrication and Optical Properties of Transparent P(VDF-TrFE) Ultrathin Films |
| title_sort | fabrication and optical properties of transparent p vdf trfe ultrathin films |
| topic | PVDF nano films Langmuir-Blodgett (LB) refractive index optical constant |
| url | https://www.mdpi.com/2079-4991/12/4/588 |
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