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Ataalite H, Dardouri M, Arbaoui A, Fathi A, Hasnaoui A, Sbiaai K. Kinetic Monte Carlo simulation of polycrystalline silver metal electrodeposition: scaling of roughness and effects of deposition parameters. Phys Chem Chem Phys 2023; 25:4216-4229. [PMID: 36656654 DOI: 10.1039/d2cp05766b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In this work, a kinetic Monte Carlo (KMC) technique was used to simulate the growth morphology of electrodeposited polycrystalline Ag thin films under a galvanostatic condition (current density). The many-body Embedded Atom Method (EAM) potential has been used to describe the Ag-Ag atomic interaction. Herein, the surface morphology is affected by the kinetic diffusion of adatoms where four jump processes are considered, namely hopping, exchange, step-edge exchange and grain boundary. The results have shown that the surface roughness follows a power law behavior versus film thickness (∝Lα) and time (∝tβ), with the roughness and growth exponents α and β found to be α = 1.14 ± 0.01 and β = 0.57 ± 0.01. The surface morphology under different deposition parameters (current density and substrate temperature) has been discussed in detail. The surface roughness increases where the current density increases due to high deposition rates, which can accelerate the growth of island mode, especially on the (111) surface. In contrast, the surface roughness decreases the temperature of the substrate increases due to thermal agitation, allowing to transform nearly columnar grains to grains with a flat and smooth surface. Finally, the simulations provided information on the subsurface deposition rate of each grain that is not directly available for experimental investigations. It was observed that the (111) grain has a faster deposition rate compared to the (100) and (110) grains due to the low surface energy of the (111) grain.
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Affiliation(s)
- Hassan Ataalite
- Sulta Moulay Slimane University of Beni Mellal, Polydisciplinary Faculty of Khouribga, Laboratory LS2ME, B.P. 145, 2500 Khouribga, Morocco.
| | - Moloudi Dardouri
- Sulta Moulay Slimane University of Beni Mellal, Polydisciplinary Faculty of Khouribga, Laboratory LS2ME, B.P. 145, 2500 Khouribga, Morocco.
| | - Abdezzahid Arbaoui
- Chouaib Doukkali University, Laboratory of Condensed Matter Physics (LCMP), 24000 El Jadida, Morocco
| | - Ahmed Fathi
- Sulta Moulay Slimane University of Beni Mellal, Polydisciplinary Faculty of Khouribga, Laboratory LS2ME, B.P. 145, 2500 Khouribga, Morocco.
| | - Abdellatif Hasnaoui
- Sulta Moulay Slimane University of Beni Mellal, Polydisciplinary Faculty of Khouribga, Laboratory LS2ME, B.P. 145, 2500 Khouribga, Morocco.
| | - Khalid Sbiaai
- Sulta Moulay Slimane University of Beni Mellal, Polydisciplinary Faculty of Khouribga, Laboratory LS2ME, B.P. 145, 2500 Khouribga, Morocco.
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Nanostructured Plasma Polymerized Fluorocarbon Films for Drop Coating Deposition Raman Spectroscopy (DCDRS) of Liposomes. Polymers (Basel) 2021; 13:polym13224023. [PMID: 34833322 PMCID: PMC8625625 DOI: 10.3390/polym13224023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 11/12/2021] [Accepted: 11/15/2021] [Indexed: 12/03/2022] Open
Abstract
Raman spectroscopy is one of the most used biodetection techniques. However, its usability is hampered in the case of low concentrated substances because of the weak intensity of the Raman signal. To overcome this limitation, the use of drop coating deposition Raman spectroscopy (DCDRS), in which the liquid samples are allowed to dry into well-defined patterns where the non-volatile solutes are highly concentrated, is appropriate. This significantly improves the Raman sensitivity when compared to the conventional Raman signal from solution/suspension. As DCDRS performance strongly depends on the wetting properties of substrates, we demonstrate here that the smooth hydrophobic plasma polymerized fluorocarbon films prepared by magnetron sputtering (contact angle 108°) are well-suited for the DCDRS detection of liposomes. Furthermore, it was proved that even better improvement of the Raman signal might be achieved if the plasma polymer surfaces are roughened. In this case, 100% higher intensities of Raman signal are observed in comparison with smooth fluorocarbon films. As it is shown, this effect, which has no influence on the profile of Raman spectra, is connected with the increased hydrophobicity of nanostructured fluorocarbon films. This results in the formation of dried liposomal deposits with smaller diameters and higher preconcentration of liposomes.
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Kim SH, Rho Y, Cho E, Myung JS, Lee SJ. Surface plasmonic resonance tunable nanocomposite thin films applicable to color filters, heat mirrors, semi-transparent electrodes, and electromagnetic-shields. NANOSCALE 2021; 13:12260-12270. [PMID: 34241610 DOI: 10.1039/d1nr02363b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This study proposes a plasmonic resonance-tunable nanocomposite thin film, which applies to a color filter, heat mirror, semi-transparent color electrode, and electromagnetic shield, given that the size and structure of nanoclusters can be controlled by a sputtering power density. The structural and functional properties of silver/plasma-polymer-fluorocarbon (Ag/PPFC) nanocomposite thin films, which were sputtered by ternary composite targets, were investigated with various compositions and sputtering power densities. The growth of Ag nanoclusters of the thin film was suppressed as the sputtering power density increased due to the rich functional group of -CFx- fluorine. As a result, a continuous color change from blue to yellow could be expressed on films given the precise control of the surface plasmonic resonance phenomenon. Grazing-incidence small-angle scattering (GISAXS) analysis indicated that the sputtering power density had a significant effect on the size, distribution, and orientation of the Ag nanoclusters in the thin film. For low sputtering power densities, Ag nanoclusters were forming aggregations along the out-of-plane direction, but as the sputtering power density increased, the nanoclusters showed random distribution instead of large aggregates. We also demonstrated applications of Ag/PPFC nanocomposite thin films to a color filter, heat mirror, semi-transparent electrode, and electromagnetic shield. In addition, the fabrication of a large-area film (400 × 700 mm2) showed that the approach applies highly to industries.
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Affiliation(s)
- Sung Hyun Kim
- Chemical Materials Solutions Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea.
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Hasanpour Ardekani-Zadeh A, Hosseini SF. Electrospun essential oil-doped chitosan/poly(ε-caprolactone) hybrid nanofibrous mats for antimicrobial food biopackaging exploits. Carbohydr Polym 2019; 223:115108. [DOI: 10.1016/j.carbpol.2019.115108] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2019] [Revised: 07/04/2019] [Accepted: 07/18/2019] [Indexed: 12/22/2022]
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Nikitin D, Madkour S, Pleskunov P, Tafiichuk R, Shelemin A, Hanuš J, Gordeev I, Sysolyatina E, Lavrikova A, Ermolaeva S, Titov V, Schönhals A, Choukourov A. Cu nanoparticles constrain segmental dynamics of cross-linked polyethers: a trade-off between non-fouling and antibacterial properties. SOFT MATTER 2019; 15:2884-2896. [PMID: 30849134 DOI: 10.1039/c8sm02413h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Copper has a strong bactericidal effect against multi-drug resistant pathogens and polyethers are known for their resistance to biofilm formation. Herein, we combined Cu nanoparticles (NPs) and a polyether plasma polymer in the form of nanocomposite thin films and studied whether both effects can be coupled. Cu NPs were produced by magnetron sputtering via the aggregation in a cool buffer gas whereas polyether layers were synthesized by Plasma-Assisted Vapor Phase Deposition with poly(ethylene oxide) (PEO) used as a precursor. In situ specific heat spectroscopy and XPS analysis revealed the formation of a modified polymer layer around the NPs which propagates on the scale of a few nanometers from the Cu NP/polymer interface and then transforms into a bulk polymer phase. The chemical composition of the modified layer is found to be ether-deficient due to the catalytic influence of copper whereas the bulk polymer phase exhibits the chemical composition close to the original PEO. Two cooperative glass transition phenomena are revealed that belong to the modified polymer layer and the bulk phase. The former is characterized by constrained mobility of polymer segments which manifests itself via a 30 K increase of dynamic glass transition temperature. Furthermore, the modified layer is characterized by the heterogeneous structure which results in higher fragility of this layer as compared to the bulk phase. The Cu NPs/polyether thin films exhibit reduced protein adsorption; however, the constrained segmental dynamics leads to the deterioration of the non-fouling properties for ultra-thin polyether coatings. The films are found to have a bactericidal effect against multi-drug resistant Gram-positive Methicillin-Resistant Staphylococcus aureus and Gram-negative Pseudomonas aeruginosa.
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Affiliation(s)
- Daniil Nikitin
- Charles University, Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, Prague, Czech Republic.
| | - Sherif Madkour
- Bundesanstalt für Materialforschung und - prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany.
| | - Pavel Pleskunov
- Charles University, Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, Prague, Czech Republic.
| | - Renata Tafiichuk
- Charles University, Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, Prague, Czech Republic.
| | - Artem Shelemin
- Charles University, Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, Prague, Czech Republic.
| | - Jan Hanuš
- Charles University, Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, Prague, Czech Republic.
| | - Ivan Gordeev
- Institute of Physics, Academy of Sciences of the Czech Republic, Cukrovarnická 10, 16200 Prague, Czech Republic
| | - Elena Sysolyatina
- Gamaleya National Research Center of Epidemiology and Microbiology, Gamaleya 18, 123098 Moscow, Russia
| | - Alexandra Lavrikova
- Gamaleya National Research Center of Epidemiology and Microbiology, Gamaleya 18, 123098 Moscow, Russia
| | - Svetlana Ermolaeva
- Gamaleya National Research Center of Epidemiology and Microbiology, Gamaleya 18, 123098 Moscow, Russia
| | - Valerii Titov
- G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya 1, 153045 Ivanovo, Russia
| | - Andreas Schönhals
- Bundesanstalt für Materialforschung und - prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany.
| | - Andrei Choukourov
- Charles University, Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, Prague, Czech Republic.
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Hosseini SF, Nahvi Z, Zandi M. Antioxidant peptide-loaded electrospun chitosan/poly(vinyl alcohol) nanofibrous mat intended for food biopackaging purposes. Food Hydrocoll 2019. [DOI: 10.1016/j.foodhyd.2018.11.033] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Macgregor M, Vasilev K. Perspective on Plasma Polymers for Applied Biomaterials Nanoengineering and the Recent Rise of Oxazolines. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E191. [PMID: 30626075 PMCID: PMC6337614 DOI: 10.3390/ma12010191] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 12/21/2018] [Accepted: 01/02/2019] [Indexed: 11/16/2022]
Abstract
Plasma polymers are unconventional organic thin films which only partially share the properties traditionally attributed to polymeric materials. For instance, they do not consist of repeating monomer units but rather present a highly crosslinked structure resembling the chemistry of the precursor used for deposition. Due to the complex nature of the deposition process, plasma polymers have historically been produced with little control over the chemistry of the plasma phase which is still poorly understood. Yet, plasma polymer research is thriving, in par with the commercialisation of innumerable products using this technology, in fields ranging from biomedical to green energy industries. Here, we briefly summarise the principles at the basis of plasma deposition and highlight recent progress made in understanding the unique chemistry and reactivity of these films. We then demonstrate how carefully designed plasma polymer films can serve the purpose of fundamental research and biomedical applications. We finish the review with a focus on a relatively new class of plasma polymers which are derived from oxazoline-based precursors. This type of coating has attracted significant attention recently due to its unique properties.
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Affiliation(s)
- Melanie Macgregor
- School of Engineering, University of South Australia, Adelaide, SA 5000, Australia.
- Future Industries Institute, University of South Australia, Adelaide, SA 5000, Australia.
| | - Krasimir Vasilev
- School of Engineering, University of South Australia, Adelaide, SA 5000, Australia.
- Future Industries Institute, University of South Australia, Adelaide, SA 5000, Australia.
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Khalakhan I, Choukourov A, Vorokhta M, Kúš P, Matolínová I, Matolín V. In situ electrochemical AFM monitoring of the potential-dependent deterioration of platinum catalyst during potentiodynamic cycling. Ultramicroscopy 2018; 187:64-70. [DOI: 10.1016/j.ultramic.2018.01.015] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 01/05/2018] [Accepted: 01/27/2018] [Indexed: 10/18/2022]
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Saboohi S, Griesser HJ, Coad BR, Short RD, Michelmore A. Promiscuous hydrogen in polymerising plasmas. Phys Chem Chem Phys 2018; 20:7033-7042. [PMID: 29473064 DOI: 10.1039/c7cp08166a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Historically, there have been two opposing views regarding deposition mechanisms in plasma polymerisation, radical growth and direct ion deposition, with neither being able to fully explain the chemistry of the resultant coating. Deposition rate and film chemistry are dependent on the chemistry of the plasma phase and thus the activation mechanisms of species in the plasma are critical to understanding the relative contributions of various chemical and physical routes to plasma polymer formation. In this study, we investigate the roles that hydrogen plays in activating and deactivating reactive plasma species. Ethyl trimethylacetate (ETMA) is used as a representative organic precursor, and additional hydrogen is added to the plasma in the form of water and deuterium oxide. Optical emission spectroscopy confirms that atomic hydrogen is abundant in the plasma. Comparison of the plasma phase mass spectra of ETMA/H2O and ETMA/D2O reveals that (1) proton transfer from hydronium is a common route to charging precursors in plasma, and (2) hydrogen abstraction (activation) and recombination (deactivation) processes are much more dynamic in the plasma than previously thought. Consideration of the roles of hydrogen in plasma chemistry may then provide a more comprehensive view of deposition processes and bridge the divide between the two disparate schools of thought.
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Affiliation(s)
- Solmaz Saboohi
- Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
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Wang Y, Wang T, Wang T, Zhang J, Chen J, Yang R, Ruan L, Wang B. Facile preparation of multifunctional poly(amide-imide)/polyaniline films: Combining self-cleaning, self-extinguishing, and conductive. POLYM ENG SCI 2018. [DOI: 10.1002/pen.24839] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yanbin Wang
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering; Changzhou University; Changzhou Jiangsu, 213164 People's Republic of China
| | - Teng Wang
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering; Changzhou University; Changzhou Jiangsu, 213164 People's Republic of China
| | - Tingmu Wang
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering; Changzhou University; Changzhou Jiangsu, 213164 People's Republic of China
| | - Jinyi Zhang
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering; Changzhou University; Changzhou Jiangsu, 213164 People's Republic of China
| | - Jinxing Chen
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering; Changzhou University; Changzhou Jiangsu, 213164 People's Republic of China
| | - Rui Yang
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering; Changzhou University; Changzhou Jiangsu, 213164 People's Republic of China
| | - Linxiao Ruan
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering; Changzhou University; Changzhou Jiangsu, 213164 People's Republic of China
| | - Biaobing Wang
- Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovolatic Science and Engineering; Changzhou University; Changzhou Jiangsu, 213164 People's Republic of China
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