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Sarkar J, Madhusudanan M, V C C, Choyal S, Chowdhury M. Roles of aqueous nonsolvents influencing the dynamic stability of poly-( n-butyl methacrylate) thin films at biologically relevant temperatures. SOFT MATTER 2023; 19:8193-8202. [PMID: 37853806 DOI: 10.1039/d3sm00812f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
Poly-(n-butyl methacrylate) (PnBMA) is an important polymer in biomedical applications. Here we study the stability of PnBMA thin films prepared on top of slippery silicon substrates and exposed to nonsolvent aqueous incubation media like water and phosphate-buffered saline (PBS) at temperatures relevant to biological applications (37 °C, 25 °C and 4 °C). Dewetting hole growth experiments allowed us to probe the instability in PnBMA films upon incubation followed by thermal annealing. From the early stage of dewetting hole growth dynamics, we inferred that the stability of the thin PnBMA films decreases as a function of the duration and temperature of incubation, even though the films were found not to readily dewet at room temperature after incubation. It is also observed that water incubation makes films more unstable than incubation in PBS. We explained our observations as a combined effect of (i) an increase in surface energy of the PnBMA film due to incubation, (ii) an increased destabilizing effect due to the dominant polar interactions between the incubation medium and the PnBMA film and (iii) the plasticization effect of PnBMA films by the incubation media. Plasticization resulted in a decrease in the modulus of PnBMA thin films as a function of incubation time. The viscosity of PnBMA films upon incubation was found to be coupled to the decreasing modulus. Thus we infer that incubation in common aqueous nonsolvents can detrimentally affect the stability of polymers limiting their specific usages through a complex interplay of multiple molecular level phenomena.
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Affiliation(s)
- Jotypriya Sarkar
- Lab of Soft Interfaces, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, India.
| | - Mithun Madhusudanan
- Lab of Soft Interfaces, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, India.
| | - Chandni V C
- Lab of Soft Interfaces, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, India.
| | - Shilpa Choyal
- Center for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai 400076, India
| | - Mithun Chowdhury
- Lab of Soft Interfaces, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai 400076, India.
- Center for Research in Nanotechnology and Science, Indian Institute of Technology Bombay, Mumbai 400076, India
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Janiszewska N, Raczkowska J, Budkowski A, Gajos K, Stetsyshyn Y, Michalik M, Awsiuk K. Dewetting of Polymer Films Controlled by Protein Adsorption. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:11817-11828. [PMID: 32921057 PMCID: PMC7584358 DOI: 10.1021/acs.langmuir.0c01718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/06/2020] [Indexed: 06/11/2023]
Abstract
The stability of the film poly(n-butyl methacrylate) (PnBMA) with different tacticities, prepared on silicon oxide and exposed to aqueous phosphate-buffered saline with different concentrations of bovine serum albumin (CBSA between 0 and 4.5 mg/mL), was examined at temperatures close to the physiological limit (between 4 and 37 °C) with optical microscopy, contact angle measurements, atomic force microscopy, and time-of-flight secondary ion mass spectrometry. For PBS solutions with CBSA = 0, the stability of atactic PnBMA and dewetting of isotactic PnBMA was observed, caused by the interplay between the stabilizing long-range dispersion forces and the destabilizing short-range polar interactions. Analogous considerations of excess free energy cannot explain the retardation of dewetting observed for isotactic PnBMA in PBS solutions with higher CBSA. Instead, formation of a BSA overlayer, adsorbed preferentially but not exclusively to uncovered SiOx regions, is evidenced and postulated to hinder polymer dewetting. Polymer dewetting and protein patterning are obtained in one step, suggesting a simple approach to fabricate biomaterials with micropatterned proteins.
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Affiliation(s)
- Natalia Janiszewska
- M.
Smoluchowski Institute of Physics, Jagiellonian
University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Joanna Raczkowska
- M.
Smoluchowski Institute of Physics, Jagiellonian
University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Andrzej Budkowski
- M.
Smoluchowski Institute of Physics, Jagiellonian
University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Katarzyna Gajos
- M.
Smoluchowski Institute of Physics, Jagiellonian
University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Yurij Stetsyshyn
- Lviv
Polytechnic National University, St. George’s Square 2, 79013 Lviv, Ukraine
| | - Maciej Michalik
- M.
Smoluchowski Institute of Physics, Jagiellonian
University, Łojasiewicza 11, 30-348 Kraków, Poland
| | - Kamil Awsiuk
- M.
Smoluchowski Institute of Physics, Jagiellonian
University, Łojasiewicza 11, 30-348 Kraków, Poland
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3
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Awsiuk K, Stetsyshyn Y, Raczkowska J, Lishchynskyi O, Dąbczyński P, Kostruba A, Ohar H, Shymborska Y, Nastyshyn S, Budkowski A. Temperature-Controlled Orientation of Proteins on Temperature-Responsive Grafted Polymer Brushes: Poly(butyl methacrylate) vs Poly(butyl acrylate): Morphology, Wetting, and Protein Adsorption. Biomacromolecules 2019; 20:2185-2197. [PMID: 31017770 DOI: 10.1021/acs.biomac.9b00030] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Poly( n-butyl methacrylate) (PBMA) or poly( n-butyl acrylate) (PBA)-grafted brush coatings attached to glass were successfully prepared using atom-transfer radical polymerization "from the surface". The thicknesses and composition of the PBMA and PBA coatings were examined using ellipsometry and time-of-flight secondary ion mass spectrometry (ToF-SIMS), respectively. For PBMA, the glass-transition temperature constitutes a range close to the physiological limit, which is in contrast to PBA, where the glass-transition temperature is around -55 °C. Atomic force microscopy studies at different temperatures suggest a strong morphological transformation for PBMA coatings, in contrast to PBA, where such essential changes in the surface morphology are absent. Besides, for PBMA coatings, protein adsorption depicts a strong temperature dependence. The combination of bovine serum albumin and anti-IgG structure analysis with the principal component analysis of ToF-SIMS spectra revealed a different orientation of proteins adsorbed to PBMA coatings at different temperatures. In addition, the biological activity of anti-IgG molecules adsorbed at different temperatures was evaluated through tracing the specific binding with goat IgG.
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Affiliation(s)
- Kamil Awsiuk
- Smoluchowski Institute of Physics , Jagiellonian University , Łojasiewicza 11 , 30-348 Kraków , Poland
| | - Yurij Stetsyshyn
- Lviv Polytechnic National University , St. George's Square 2 , 79013 Lviv , Ukraine
| | - Joanna Raczkowska
- Smoluchowski Institute of Physics , Jagiellonian University , Łojasiewicza 11 , 30-348 Kraków , Poland
| | - Ostap Lishchynskyi
- Lviv Polytechnic National University , St. George's Square 2 , 79013 Lviv , Ukraine
| | - Paweł Dąbczyński
- Smoluchowski Institute of Physics , Jagiellonian University , Łojasiewicza 11 , 30-348 Kraków , Poland
| | - Andrij Kostruba
- Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies , Pekarska 50 , 79000 Lviv , Ukraine
| | - Halyna Ohar
- Lviv Polytechnic National University , St. George's Square 2 , 79013 Lviv , Ukraine
| | - Yana Shymborska
- Lviv Polytechnic National University , St. George's Square 2 , 79013 Lviv , Ukraine
| | - Svyatoslav Nastyshyn
- Smoluchowski Institute of Physics , Jagiellonian University , Łojasiewicza 11 , 30-348 Kraków , Poland
| | - Andrzej Budkowski
- Smoluchowski Institute of Physics , Jagiellonian University , Łojasiewicza 11 , 30-348 Kraków , Poland
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4
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Raczkowska J, Prauzner-Bechcicki S, Dąbczyński P, Szydlak R. Elasticity patterns induced by phase-separation in polymer blend films. THIN SOLID FILMS 2017; 624:181-186. [PMID: 29681664 PMCID: PMC5909711 DOI: 10.1016/j.tsf.2017.01.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Systematical studies on the impact of the thickness of thin films composed of polystyrene (PS) or poly(ethylene oxide) (PEO) on the effective elasticity of polymer-decorated soft polydimethylsiloxane substrate were performed. For both investigated polymer films, elasticity parameter was determined from force-displacement curves recorded using atomic force microscopy. Effective stiffness of supported film grows monotonically with film thickness, starting from the value comparable to the elasticity of soft support and reaching plateau for polymer layers thicker than 200 nm. In contrary, for films cast on hard support no significant thickness dependence of elasticity was observed and the value of elasticity parameter was similar to the one of the substrate. Based on these results, non-conventional method to produce elasticity patterns of various shapes and dimensions induced by phase-separation process in symmetric and asymmetric PS:PEO blend films on soft support was demonstrated. Elevated PS domains were characterized by elasticity parameter 2 times higher than lower PEO matrix. In contrary, adhesion force was increased more than 3 times for PEO regions, as compared to PS areas.
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Affiliation(s)
- Joanna Raczkowska
- The Marian Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-428 Kraków, Poland
| | - Szymon Prauzner-Bechcicki
- The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland
| | - Paweł Dąbczyński
- The Marian Smoluchowski Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-428 Kraków, Poland
| | - Renata Szydlak
- Chair of Medical Biochemistry, Jagiellonian University Medical College, Kopernika 7, 31-034 Kraków, Poland
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Hisyam A Razak A, Yu L, Skov AL. Voltage-stabilised elastomers with increased relative permittivity and high electrical breakdown strength by means of phase separating binary copolymer blends of silicone elastomers. RSC Adv 2017. [DOI: 10.1039/c7ra02620j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Increased electro-mechanical properties of silicone-based dielectric elastomers are achieved by means of the addition of so-called voltage-stabilisers prepared from PDMS–PPMS copolymers.
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Affiliation(s)
- Aliff Hisyam A Razak
- Danish Polymer Center
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | - Liyun Yu
- Danish Polymer Center
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | - Anne Ladegaard Skov
- Danish Polymer Center
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
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6
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Li Y, Hu K, Han X, Yang Q, Xiong Y, Bai Y, Guo X, Cui Y, Yuan C, Ge H, Chen Y. Phase Separation of Silicon-Containing Polymer/Polystyrene Blends in Spin-Coated Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:3670-3678. [PMID: 27052643 DOI: 10.1021/acs.langmuir.6b00447] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this Article, two readily available polymers that contain silicon and have different surface tensions, polydimethylsiloxane (PDMS) and polyphenylsilsequioxane (PPSQ), were used to produce polymer blends with polystyrene (PS). Spin-coated thin films of the polymer blends were treated by O2 reactive-ion etching (RIE). The PS constituent was selectively removed by O2 RIE, whereas the silicon-containing phase remained because of the high etching resistance of silicon. This selective removal of PS substantially enhanced the contrast of the phase separation morphologies for better scanning electron microscope (SEM) and atomic force microscope (AFM) measurements. We investigated the effects of the silicon-containing constituents, polymer blend composition, concentration of the polymer blend solution, surface tension of the substrate, and the spin-coating speed on the ultimate morphologies of phase separation. The average domain size, ranging from 100 nm to 10 μm, was tuned through an interplay of these factors. In addition, the polymer blend film was formed on a pure organic layer, through which the aspect ratio of the phase separation morphologies was further amplified by a selective etching process. The formed nanostructures are compatible with existing nanofabrication techniques for pattern transfer onto substrates.
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Affiliation(s)
- Yang Li
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Kai Hu
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Xiao Han
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Qinyu Yang
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Yifeng Xiong
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Yuhang Bai
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Xu Guo
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Yushuang Cui
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Changsheng Yuan
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Haixiong Ge
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
| | - Yanfeng Chen
- Department of Materials Science and Engineering, College of Engineering and Applied Sciences, Nanjing University , Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China
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7
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Ohta M, Ono T, Kokado K, Kakugo A, Sada K. Lipophilic Ionomers with Bulky Ion-Pairs and Effect of Counterion on Miscibility of the Ionomer Blends. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500281] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Masahiko Ohta
- Graduate School of Chemical Sciences and Engineering; Hokkaido University; Kita10 Nishi8, Kita-ku Sapporo 060-0810 Japan
| | - Toshikazu Ono
- Department of Chemistry and Biochemistry; Graduate School of Engineering; Kyushu University; Motooka 744, Nishi-ku Fukuoka 819-0395 Japan
| | - Kenta Kokado
- Graduate School of Chemical Sciences and Engineering; Hokkaido University; Kita10 Nishi8, Kita-ku Sapporo 060-0810 Japan
- Department of Chemistry; Faculty of Science; Hokkaido University; Kita10 Nishi8, Kita-ku Sapporo 060-0810 Japan
| | - Akira Kakugo
- Graduate School of Chemical Sciences and Engineering; Hokkaido University; Kita10 Nishi8, Kita-ku Sapporo 060-0810 Japan
- Department of Chemistry; Faculty of Science; Hokkaido University; Kita10 Nishi8, Kita-ku Sapporo 060-0810 Japan
| | - Kazuki Sada
- Graduate School of Chemical Sciences and Engineering; Hokkaido University; Kita10 Nishi8, Kita-ku Sapporo 060-0810 Japan
- Department of Chemistry; Faculty of Science; Hokkaido University; Kita10 Nishi8, Kita-ku Sapporo 060-0810 Japan
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8
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Khattak M, Pu F, Curran JM, Hunt JA, D'Sa RA. Human mesenchymal stem cell response to poly(ε-caprolactone/poly(methyl methacrylate) demixed thin films. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:178. [PMID: 25893385 DOI: 10.1007/s10856-015-5507-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Accepted: 03/30/2015] [Indexed: 06/04/2023]
Abstract
Advances in material sciences have enabled the fabrication of biomaterials which are able to provide the requisite cues to stimulate cells to behave in a specific way. Nanoscale surface topographies are well known to be able to positively influence cell-substrate interactions. This study reports on a novel series of poly(ε-caprolactone) PCL and poly(methyl methacrylate) demixed nanotopographic films as non-biological cell-stimulating cues. The topographic features observed ranged from nanoislands to nanopits. PMMA was observed to segregate to the air interface, while PCL preferred the substrate interface. Preliminary response of human mesenchymal stem cells to these surfaces indicated that the substrate with nanoisland topography has the potential to differentiate to osteogenic, chondrogenic and adipogenic lineages.
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Affiliation(s)
- Mohammed Khattak
- Centre for Materials and Structures, University of Liverpool, Brownlow Hill, Liverpool, L69 3GH, UK
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9
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Rodríguez-Hernández J. Wrinkled interfaces: Taking advantage of surface instabilities to pattern polymer surfaces. Prog Polym Sci 2015. [DOI: 10.1016/j.progpolymsci.2014.07.008] [Citation(s) in RCA: 218] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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11
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Chen LM, Xu Z, Hong Z, Yang Y. Interface investigation and engineering – achieving high performance polymer photovoltaic devices. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b925382c] [Citation(s) in RCA: 517] [Impact Index Per Article: 36.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Ivanova EP, Mitik-Dineva N, Wang J, Pham DK, Wright JP, Nicolau DV, Mocanasu RC, Crawford RJ. Staleya guttiformis attachment on poly(tert-butylmethacrylate) polymeric surfaces. Micron 2008; 39:1197-204. [DOI: 10.1016/j.micron.2008.04.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2008] [Revised: 04/28/2008] [Accepted: 04/28/2008] [Indexed: 10/22/2022]
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13
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Zemła J, Lekka M, Wiltowska-Zuber J, Budkowski A, Rysz J, Raczkowska J. Integral geometry analysis of fluorescence micrographs for quantitative relative comparison of protein adsorption onto polymer surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:10253-10258. [PMID: 18707145 DOI: 10.1021/la801313u] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Most methods developed to study protein binding to distinct surfaces can only determine the average amount of adsorbed protein or merely provide (qualitative) information on its spatial distribution. Both these features can be characterized rigorously by integral geometry analysis of fluorescence micrographs. This approach is introduced here to compare the relative protein adsorption onto various polymer surfaces: polystyrene (PS), poly(methyl methacrylate) (PMMA), poly( n-butyl methacrylate) (PnBMA), poly( tert-butyl methacrylate) (PtBMA), and PS(PETA) and cross-linked poly(ethylene oxide) (PEO*(PETA)), admixed with pentaerythritol triacrylate (PETA). The polymeric surfaces were incubated for 15 min in phosphate-buffered saline (pH 7.4) containing 125 mug/mL fluorescently labeled lectins, either lentil lectin (LcH) or concanavalin A (ConA). Fluorescence images were recorded at identical conditions (physiological buffer, same exposure time, magnification, gain). For each image, taken a few times for each polymer, the distribution and average value of the normalized intensity were determined. The results show that the binding of LcH to PS(PETA), PtBMA, PS, PnBMA, PMMA, and PEO*(PETA) can be expressed by the ratio of the following values (mean +/- 95% confidence interval): 0.356 +/- 0.022, 0.298 +/- 0.030, 0.241 +/- 0.014, 0.083 +/- 0.008, 0.039 +/- 0.008, and 0.010 +/- 0.006, respectively. In turn, the relative adsorption of ConA is described by the values 0.252 +/- 0.016, 0.217 +/- 0.014, 0.222 +/- 0.016, 0.046 +/- 0.006, 0.116 +/- 0.008, and 0.006 +/- 0.002, respectively. Low dispersions of fluorescence intensity around average values indicate homogeneous distribution of adsorbed proteins. The introduced approach enables a fast and easy way not only to quantify the relative amount of bound proteins but also to characterize quantitatively the organization of their surface distribution, as demonstrated for patchlike protein adsorption onto the polymer blend surface.
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Affiliation(s)
- Joanna Zemła
- Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, Kraków, Poland
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14
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Jaczewska J, Budkowski A, Bernasik A, Moons E, Rysz J. Polymer vs Solvent Diagram of Film Structures Formed in Spin-Cast Poly(3-alkylthiophene) Blends. Macromolecules 2008. [DOI: 10.1021/ma7022974] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Jaczewska
- M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland, Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland, and Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden
| | - A. Budkowski
- M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland, Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland, and Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden
| | - A. Bernasik
- M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland, Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland, and Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden
| | - E. Moons
- M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland, Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland, and Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden
| | - J. Rysz
- M. Smoluchowski Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland, Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland, and Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden
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15
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Rehse S, Mecke K, Magerle R. Characterization of the dynamics of block copolymer microdomains with local morphological measures. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 77:051805. [PMID: 18643095 DOI: 10.1103/physreve.77.051805] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2007] [Revised: 02/15/2008] [Indexed: 05/26/2023]
Abstract
We investigate the structure formation in thin films of cylinder forming block copolymers. With in situ scanning probe microscopy image sequences can be recorded with high temporal (2 min per frame) and spatial (10 nm) resolution. We compare different image processing methods for quantitative analysis of the large amount of data. Computing local Minkowski functionals yields local geometrical and morphological information about the observed structures and enables us to track their evolution with time. An alternative characterization method is to reduce the gray scale images to their skeleton and to classify and count the branching points of the skeletonized structure. We tracked the temporal evolution of these measures and computed correlation functions.
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Affiliation(s)
- S Rehse
- Chemische Physik, Technische Universität Chemnitz, Reichenhainer Strasse 70, D-09126 Chemnitz, Germany.
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16
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Nilsson S, Bernasik A, Budkowski A, Moons E. Morphology and Phase Segregation of Spin-Casted Films of Polyfluorene/PCBM Blends. Macromolecules 2007. [DOI: 10.1021/ma070712a] [Citation(s) in RCA: 297] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Svante Nilsson
- Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden; Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland; and Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
| | - Andrzej Bernasik
- Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden; Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland; and Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
| | - Andrzej Budkowski
- Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden; Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland; and Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
| | - Ellen Moons
- Department of Physics, Karlstad University, SE-651 88 Karlstad, Sweden; Faculty of Physics and Applied Computer Science, AGH-University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland; and Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Kraków, Poland
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17
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Park T, Zimmerman SC. Formation of a miscible supramolecular polymer blend through self-assembly mediated by a quadruply hydrogen-bonded heterocomplex. J Am Chem Soc 2007; 128:11582-90. [PMID: 16939282 DOI: 10.1021/ja0631854] [Citation(s) in RCA: 201] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A supramolecular network polymer consisting of a pair of immiscible polymers, poly(butyl)methacrylate (PBMA) and polystyrene (PS), is described. A urea of guanosine (1, UG) and 2,7-diamido-1,8-naphthyridine (2, DAN), which form an exceptionally strong quadruply hydrogen-bonding complex, are displayed at 1-10 mol % along the main backbone of PBMA and PS, respectively. (1)H NMR studies show heterocomplexation between UG and DAN exclusively. This high-fidelity, high-affinity supramolecular connection of two different polymer coils at the molecular level produces a polymer blend. Blends containing different weight ratios of the polymers and mole percent of the recognition units were characterized by AFM and DSC experiments with no isolated domains observed and a single glass-transition temperature (T(g)). The T(g) is tunable by varying the weight ratio of the polymers in the blend. In addition, viscosity measurements, size-exclusion chromatography (SEC), and dynamic light-scattering (DLS) studies demonstrate the formation of a supramolecular network structure.
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Affiliation(s)
- Taiho Park
- Department of Chemistry, Roger Adams Laboratory, 600 S. Mathews Avenue, University of Illinois, Urbana, Illinois 61801, USA
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Raczkowska J, Montenegro R, Budkowski A, Landfester K, Bernasik A, Rysz J, Czuba P. Structure evolution in layers of polymer blend nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:7235-40. [PMID: 17511480 DOI: 10.1021/la062844n] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
The early stages of phase evolution, not available for nanometer polymer blend films spin-cast from solutions of incompatible mixtures, have been examined for films prepared from nanoparticles of deuterated polystyrene/ poly(methyl methacrylate) blends (1:1 mass fraction of dPS/PMMA) with PS-PMMA diblock copolymer additives. The initial phase arrangement, confined to the size of nanoparticles, has provided the homogeneity of the initial film composition. The early stages of structure formation, promoted by annealing and traced with atomic and lateral force microscopy (AFM, LFM) as well as secondary ion mass spectroscopy (SIMS), resulted in bilayers, observed commonly for as-prepared solvent-cast blends. The initiated capillary instability of the upper dPS-rich layer depended on copolymer additives, which enhanced the lateral structures pinning the dewetting process.
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Affiliation(s)
- Joanna Raczkowska
- Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland.
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Raczkowska J, Bernasik A, Budkowski A, Rysz J, Gao B, Lieberman M. Compositional Mismatch between Chemical Patterns on a Substrate and Polymer Blends Yielding Spin-Cast Films with Subpattern Periodicity. Macromolecules 2007. [DOI: 10.1021/ma062614f] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. Raczkowska
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - A. Bernasik
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - A. Budkowski
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - J. Rysz
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - B. Gao
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
| | - M. Lieberman
- M. Smoluchowski Institute of Physics, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Nuclear Techniques, AGH - University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556
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Jaczewska J, Budkowski A, Bernasik A, Raptis I, Raczkowska J, Goustouridis D, Rysz J, Sanopoulou M. Humidity and solvent effects in spin-coated polythiophene–polystyrene blends. J Appl Polym Sci 2007. [DOI: 10.1002/app.26012] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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21
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Kim JW, Larsen RJ, Weitz DA. Synthesis of Nonspherical Colloidal Particles with Anisotropic Properties. J Am Chem Soc 2006; 128:14374-7. [PMID: 17076511 DOI: 10.1021/ja065032m] [Citation(s) in RCA: 322] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We describe a promising and flexible technique for fabricating uniform nonspherical particles with anisotropic phase and surface properties. Our approach is based on the seeded polymerization technique in which monomer-swollen particles are polymerized. The polymerization causes a phase separation to occur, giving rise to two-phase nonspherical particles. We show that the elastic contraction of the swollen polymer particles induced by elevated polymerization temperatures plays an important role in the phase separation. Moreover, chemical anisotropy of nonspherical particles can be obtained by using immiscible polymer pairs and by employing surface treatments. Furthermore, we are able to produce amphiphilic dumbbell particles consisting of two different bulbs: hydrophilic poly (ethylene imine)-coated polystyrene and hydrophobic polystyrene. Controlled geometries of these amphiphilic nonspherical particles will allow a wide range of potential applications, such as engineered colloid surfactants.
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Affiliation(s)
- Jin-Woong Kim
- Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
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22
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Kontturi E, Thüne PC, Niemantsverdriet JW(H. Trimethylsilylcellulose/Polystyrene Blends as a Means To Construct Cellulose Domains on Cellulose. Macromolecules 2005. [DOI: 10.1021/ma0504419] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eero Kontturi
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
| | - Peter C. Thüne
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Lim JY, Hansen JC, Siedlecki CA, Hengstebeck RW, Cheng J, Winograd N, Donahue HJ. Osteoblast Adhesion on Poly(l-lactic Acid)/Polystyrene Demixed Thin Film Blends: Effect of Nanotopography, Surface Chemistry, and Wettability. Biomacromolecules 2005; 6:3319-27. [PMID: 16283761 DOI: 10.1021/bm0503423] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Biomaterial surface characteristics are critical cues that regulate cell function. We produced a novel series of poly(l-lactic acid) (PLLA) and polystyrene demixed nanotopographic films to provide nonbiological cell-stimulating cues. The increase in PLLA weight fraction (phi) in blend solutions resulted in topography changes in spin-cast films from pit-dominant to island-dominant morphologies having nanoscale depth or height (3-29 nm). Lower molecular weight PLLA segregated to the top surface of demixed films, as observed by X-ray photoelectron spectroscopy and secondary ion mass spectroscopy (SIMS). For phi > or = 0.5, the topmost film layer was predominantly filled with PLLA (>96% by SIMS at 20-A depth). Nanotextured substrata stimulated osteoblastic cell adhesion to a greater degree than did flat PLLA (phi = 1), and this effect was more pronounced for nanoisland (phi = 0.7 and 0.9) relative to nanopit topographies (phi = 0.5). Demixed films having relatively lower water contact angles generally enhanced cell adhesion and spreading. Our results reveal that cell adhesion is affected by surface chemistry, topography, and wettability simultaneously and that nanotextured surfaces may be utilized in regulating cell adhesion.
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Affiliation(s)
- Jung Yul Lim
- Division of Musculoskeletal Sciences, Department of Orthopaedics and Rehabilitation, Center for Biomedical Devices and Functional Tissue Engineering, College of Medicine, Pennsylvania State University, Hershey, Pennsylvania 17033, USA
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24
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Raczkowska J, Cyganik P, Budkowski A, Bernasik A, Rysz J, Raptis I, Czuba P, Kowalski K. Composition Effects in Polymer Blends Spin-Cast on Patterned Substrates. Macromolecules 2005. [DOI: 10.1021/ma051242s] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Raczkowska
- M. Smoluchowski Institute of Physics and Joint Center for Chemical Analysis and Structural Research, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Applied Computer Science and Faculty of Metallurgy and Materials Science, AGH−University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; and Institute of Microelectronics, NCRS “Demokritos”, 15310 Aghia Paraskevi, Greece
| | - P. Cyganik
- M. Smoluchowski Institute of Physics and Joint Center for Chemical Analysis and Structural Research, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Applied Computer Science and Faculty of Metallurgy and Materials Science, AGH−University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; and Institute of Microelectronics, NCRS “Demokritos”, 15310 Aghia Paraskevi, Greece
| | - A. Budkowski
- M. Smoluchowski Institute of Physics and Joint Center for Chemical Analysis and Structural Research, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Applied Computer Science and Faculty of Metallurgy and Materials Science, AGH−University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; and Institute of Microelectronics, NCRS “Demokritos”, 15310 Aghia Paraskevi, Greece
| | - A. Bernasik
- M. Smoluchowski Institute of Physics and Joint Center for Chemical Analysis and Structural Research, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Applied Computer Science and Faculty of Metallurgy and Materials Science, AGH−University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; and Institute of Microelectronics, NCRS “Demokritos”, 15310 Aghia Paraskevi, Greece
| | - J. Rysz
- M. Smoluchowski Institute of Physics and Joint Center for Chemical Analysis and Structural Research, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Applied Computer Science and Faculty of Metallurgy and Materials Science, AGH−University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; and Institute of Microelectronics, NCRS “Demokritos”, 15310 Aghia Paraskevi, Greece
| | - I. Raptis
- M. Smoluchowski Institute of Physics and Joint Center for Chemical Analysis and Structural Research, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Applied Computer Science and Faculty of Metallurgy and Materials Science, AGH−University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; and Institute of Microelectronics, NCRS “Demokritos”, 15310 Aghia Paraskevi, Greece
| | - P. Czuba
- M. Smoluchowski Institute of Physics and Joint Center for Chemical Analysis and Structural Research, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Applied Computer Science and Faculty of Metallurgy and Materials Science, AGH−University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; and Institute of Microelectronics, NCRS “Demokritos”, 15310 Aghia Paraskevi, Greece
| | - K. Kowalski
- M. Smoluchowski Institute of Physics and Joint Center for Chemical Analysis and Structural Research, Jagellonian University, Reymonta 4, 30-059 Kraków, Poland; Faculty of Physics and Applied Computer Science and Faculty of Metallurgy and Materials Science, AGH−University of Science and Technology, Mickiewicza 39, 30-059 Kraków, Poland; and Institute of Microelectronics, NCRS “Demokritos”, 15310 Aghia Paraskevi, Greece
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