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Delcheva I, Weinfurter A, Hui KW, Gheorghiu A, Tran TTD, Vasilev K, Mougel V, Harmer SL, MacGregor MN. Hydrophobic Coatings with Charge Permeability via Plasma Deposition of Long-Chain Perfluorocarbons. ACS APPLIED ENERGY MATERIALS 2024; 7:5326-5337. [PMID: 38994436 PMCID: PMC11235096 DOI: 10.1021/acsaem.3c03177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 03/03/2024] [Accepted: 04/18/2024] [Indexed: 07/13/2024]
Abstract
Hydrophobization of nanotextured catalyst materials is a promising route to enhance the yield of N2 and CO2 conversion into green fuels. However, these applications require a hydrophobic coating to not only promote air trapping but also allow charge transfer at the electrode-electrolyte interface. In this work, nano thin films with thicknesses as low as 7 nm were deposited from the plasma phase of perfluorohexene, perfluorodecene, and perfluorooctane (PFO) precursors using a mild vacuum and gentle powers. Atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) characterization reveal that the resulting films are conformal and hydrophobic thanks to a good retention of CF2 and CF3 moieties. The PFO films exhibited the highest water contact angle and achieved superhydrophobic states when deposited on top of re-entrant nano features, an indication of successful air trapping. Electrochemical studies further demonstrated that the plasma-deposited PFO films allow charge transfer but could only sustain repeated cyclic voltammetry cycles without losing their hydrophobicity when deposited under optimal conditions. This result indicates that plasma deposition could become a viable route for the hydrophobization of electrocatalysts required to enhance the yield of poorly soluble gas reduction reactions.
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Affiliation(s)
- Iliana Delcheva
- Institute
for Nanoscale Science and Technology, Flinders
University, Bedford
Park, South Australia 5042, Australia
| | - Anna Weinfurter
- Department
of Chemistry and Applied Biosciences, Laboratory
of Inorganic Chemistry ETH Zürich, Vladimir Prelog Weg. 1-5, CH-8093 Zürich, Switzerland
| | - Ka Wai Hui
- Future
Industries Institute, University of South
Australia, Mawson
Lakes, South Australia 5095, Australia
| | - Alexandru Gheorghiu
- Future
Industries Institute, University of South
Australia, Mawson
Lakes, South Australia 5095, Australia
| | - Thi Thuy Dung Tran
- Future
Industries Institute, University of South
Australia, Mawson
Lakes, South Australia 5095, Australia
| | - Krasimir Vasilev
- Institute
for Nanoscale Science and Technology, Flinders
University, Bedford
Park, South Australia 5042, Australia
| | - Victor Mougel
- Department
of Chemistry and Applied Biosciences, Laboratory
of Inorganic Chemistry ETH Zürich, Vladimir Prelog Weg. 1-5, CH-8093 Zürich, Switzerland
| | - Sarah L. Harmer
- Institute
for Nanoscale Science and Technology, Flinders
University, Bedford
Park, South Australia 5042, Australia
| | - Melanie N. MacGregor
- Institute
for Nanoscale Science and Technology, Flinders
University, Bedford
Park, South Australia 5042, Australia
- Future
Industries Institute, University of South
Australia, Mawson
Lakes, South Australia 5095, Australia
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Cho Y, Kim S, Park CH. Surface Wettability Prediction Using Image Analysis and an Artificial Neural Network. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:7208-7217. [PMID: 35658434 DOI: 10.1021/acs.langmuir.2c00539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this study, a wettability-predicting method that uses an artificial neural network (ANN) by learning from digital images of the actual surface structures was developed. Polyester film surfaces were treated with oxygen plasma to realize various nanostructured surfaces. Surface structural characteristics from SEM images were quantified in a multifaceted way using a box-counting algorithm, a gray-level co-occurrence matrix algorithm, and binary image analysis. An ANN model that can predict wettability from surface structures was developed using the quantified surface structure and the resulting wettability as learning data. Furthermore, a surface with an optimal nanostructure to achieve superhydrophobicity was suggested by considering extracted surface structural parameters that significantly affect the surface wettability.
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Affiliation(s)
- Yoonkyung Cho
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
| | - Sungmin Kim
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
| | - Chung Hee Park
- Department of Textiles, Merchandising and Fashion Design, Seoul National University, Seoul 08826, Republic of Korea
- Research Institute of Human Ecology, Seoul National University, Seoul 08826, Republic of Korea
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Moradbeigi M, Razaghi M. Investigation of optical and electrical properties of novel 4T all perovskite tandem solar cell. Sci Rep 2022; 12:6733. [PMID: 35468911 PMCID: PMC9038785 DOI: 10.1038/s41598-022-10513-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 02/02/2022] [Indexed: 01/30/2023] Open
Abstract
In this paper, a combined three-dimensional (3D) optical-electrical simulation of non-pb and flexible four-terminal (4T) all perovskite tandem solar cell (APTSC) is presented. In this structure, polyethylene terephthalate (PET) is used as substrates, while the top sub cell has a [Formula: see text] absorber layer and the bottom sub cell has a [Formula: see text] absorber layer. This structure is used as a reference in this paper and the optical and electrical properties of it are investigated using the finite element method (FEM). It is shown that this structure has a total power conversion efficiency (PCE) of [Formula: see text]. Then, the elimination of the buffer layer and the addition of antireflection layer (ARL) strategies, as well as the use of periodic nano-texture patterns, are used to increase the reference structure's total PCE. A free-buffer layer tandem device is presented to minimize the parasitic absorption. While the total PCE is improved by [Formula: see text] in this case, one of the fabrication steps is also eliminated. A plasma-polymer-fluorocarbon (PPFC) coating layer is suggested as ARL on the substrates of both sub cells to reduce reflection loss. With optimized these layers thickness, total PCE is increased by [Formula: see text]. Because the PPFC layer is hydrophobic, the top surface of two sub cells in this structure has self-cleaning characteristic. As a result, this device offers long-term moisture resistance. Finally, the best structure in terms of the maximum total PCE is presented by increasing optical path-length utilizing nano-photonic and nano-plasmonic structures. The final structure is offered as a 4T tandem solar cell (TSC) that is environmentally friendly, extremely flexible, and has self-cleaning capability, with a total PCE of [Formula: see text], which is greater than the total PCE of the reference structure by [Formula: see text].
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Affiliation(s)
- Mahsa Moradbeigi
- Department of Physics, Faculty of Science, University of Kurdistan, Sanandaj, Iran
| | - Mohammad Razaghi
- Department of Electronics and Communication Engineering, Faculty of Engineering, University of Kurdistan, Sanandaj, Iran.
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Koppe C, Hoene A, Walschus U, Finke B, Testrich H, Pohl C, Brandt N, Patrzyk M, Meichsner J, Nebe B, Schlosser M. Local Inflammatory Response after Intramuscularly Implantation of Anti-Adhesive Plasma-Fluorocarbon-Polymer Coated Ti6AI4V Discs in Rats. Polymers (Basel) 2021; 13:polym13162684. [PMID: 34451224 PMCID: PMC8399026 DOI: 10.3390/polym13162684] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/23/2021] [Accepted: 07/29/2021] [Indexed: 12/23/2022] Open
Abstract
Orthopaedic implants and temporary osteosynthesis devices are commonly based on Titanium (Ti). For short-term devices, cell-material contact should be restricted for easy removal after bone healing. This could be achieved with anti-adhesive plasma-fluorocarbon-polymer (PFP) films created by low-temperature plasma processes. Two different PFP thin film deposition techniques, microwave (MW) and radiofrequency (RF) discharge plasma, were applied to receive smooth, hydrophobic surfaces with octafluoropropane (C3F8) or hexafluorohexane (C6F6) as precursors. This study aimed at examining the immunological local tissue reactions after simultaneous intramuscular implantation of four different Ti samples, designated as MW-C3F8, MW-C6F6, RF-C3F8 and Ti-controls, in rats. A differentiated morphometric evaluation of the inflammatory reaction was conducted by immunohistochemical staining of CD68+ macrophages, CD163+ macrophages, MHC class II-positive cells, T lymphocytes, CD25+ regulatory T lymphocytes, NK cells and nestin-positive cells in cryosections of surrounding peri-implant tissue. Tissue samples were obtained on days 7, 14 and 56 for investigating the acute and chronical inflammation (n = 8 rats/group). Implants with a radiofrequency discharge plasma (RF-C3F8) coating exhibited a favorable short- and long-term immune/inflammatory response comparable to Ti-controls. This was also demonstrated by the significant decrease in pro-inflammatory CD68+ macrophages, possibly downregulated by significantly increasing regulatory T lymphocytes.
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Affiliation(s)
- Charlotte Koppe
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, 17487 Greifswald, Germany; (C.K.); (A.H.); (U.W.); (C.P.); (N.B.); (M.P.)
| | - Andreas Hoene
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, 17487 Greifswald, Germany; (C.K.); (A.H.); (U.W.); (C.P.); (N.B.); (M.P.)
| | - Uwe Walschus
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, 17487 Greifswald, Germany; (C.K.); (A.H.); (U.W.); (C.P.); (N.B.); (M.P.)
| | - Birgit Finke
- Leibniz Institute for Plasma Science and Technology (INP), 17487 Greifswald, Germany; (B.F.); (H.T.)
| | - Holger Testrich
- Leibniz Institute for Plasma Science and Technology (INP), 17487 Greifswald, Germany; (B.F.); (H.T.)
| | - Christopher Pohl
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, 17487 Greifswald, Germany; (C.K.); (A.H.); (U.W.); (C.P.); (N.B.); (M.P.)
| | - Nico Brandt
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, 17487 Greifswald, Germany; (C.K.); (A.H.); (U.W.); (C.P.); (N.B.); (M.P.)
| | - Maciej Patrzyk
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, 17487 Greifswald, Germany; (C.K.); (A.H.); (U.W.); (C.P.); (N.B.); (M.P.)
| | - Jürgen Meichsner
- Institute of Physics, University of Greifswald, 17487 Greifswald, Germany;
| | - Barbara Nebe
- Department of Cell Biology, University Medical Center Rostock, 18057 Rostock, Germany;
| | - Michael Schlosser
- Department of General Surgery, Visceral, Thoracic and Vascular Surgery, University Medical Center Greifswald, 17487 Greifswald, Germany; (C.K.); (A.H.); (U.W.); (C.P.); (N.B.); (M.P.)
- Correspondence: ; Tel.: +49-3834-8680422
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