Výsledky vyhledávání - "Mahdy M. Elmahdy"

H-Shaped Copolymer of Polyethylene and Poly(ethylene oxide) under Severe Confinement: Phase State and Dynamics

Autor: George Floudas, Athanassios K. Ladavos, Dimitrios Gournis, Christos Spanos, Mahdy M. Elmahdy

Publikováno v: Langmuir. 36:4261-4271

The self-assembly and the dynamics of an H-shaped copolymer composed of a polyethylene midblock and four poly(ethylene oxide) arms (PE-b-4PEO) are investigated in the bulk and under severe confinem...

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ebb155546976be4750456f6acdb19be9
https://doi.org/10.1021/acs.langmuir.0c00127

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Tetrabutylammonium tetrafluoroborate electrolyte as poly(vinyl chloride-co-vinyl acetate-co-2-hydroxypropyl acrylate) plasticizer: Thermal degradation and optical characteristics

Autor: Mahdy M. Elmahdy, Moustafa. T. Ahmed, Khalid A. Aldhafeeri, Maged A Azzam, Tarek Fahmy

Casting method was employed to prepare films of poly(vinyl chloride-co-vinyl acetate-co-2-hydroxypropyl acrylate) (PVVH) copolymer doped with different concentrations of tetrabutylammonium tetrafluoroborate ([TBA][BF4]) electrolyte. The interaction b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b2f67cfa6d39749dded0d6ed1c69f8df
https://doi.org/10.21203/rs.3.rs-1416243/v1

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Structural, optical and dielectric investigations of electrodeposited p-type Cu2O

Autor: Mahdy M. Elmahdy, Abdelhamid El-Shaer

Publikováno v: Journal of Materials Science: Materials in Electronics. 30:19894-19905

Electrodeposition technique is employed to prepare cuprous oxide (Cu2O) thin film on fluorine-doped tin oxide (FTO) conducting glass substrate through the reduction of copper lactate in alkaline solution at pH = 12.25. Structural, optical and dielect

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::75de3538ed80d0a3456e284648fcb50d
https://doi.org/10.1007/s10854-019-02356-z

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pH and Salt Response of Mixed Brushes Made of Oppositely Charged Polyelectrolytes Studied by in Situ AFM Force Measurements and Imaging

Autor: Astrid Drechsler, Manfred Stamm, Petra Uhlmann, Mahdy M. Elmahdy

Publikováno v: Langmuir. 34:4739-4749

The response of mixed brushes made of poly(acrylic acid) and poly(2-vinyl pyridine) with a mixing ratio of about 60:40 was studied using atomic force microscopy (AFM) force measurements with colloidal probes and AFM imaging with a sharp tip in the pH

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d322784b9b48119378bd524ff2bdf22
https://doi.org/10.1021/acs.langmuir.8b00498

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Counterbalance between Surface and Confinement Effects As Studied for Amino-Terminated Poly(propylene glycol) Constraint in Silica Nanopores

Autor: Reinhard Krause-Rehberg, Wycliffe Kiprop Kipnusu, Friedrich Kremer, Mahdy M. Elmahdy, Mohamed Elsayed

Broadband dielectric spectroscopy (BDS) and orthopositronium annihilation lifetime spectroscopy (PALS) are combined to study the molecular dynamics and the free volume of poly(propylene glycol) terminated with amino end groups (PPG-NH2) in the bulk s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9390e6c5c30006830759337bfd93f439

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Optical and antibacterial properties of 1-butyl-3-methylimidazolium ionic liquids with trifluoromethanesulfonate or tetrafluoroborate anion

Autor: Mahdy M. Elmahdy, Elmutasim O. Ibnouf, Yassine Riadi, Khalid A. Aldhafeeri, T. Fahmy

Publikováno v: Materials Chemistry and Physics. 264:124369

Two room temperature ionic liquids (RTILs) having the same cation (1-butyl-3-methylimidazolium [ BMIM ] + ) and different anions (tetrafluoroborate [ BF 4 ] − or trifluoromethanesulfonate [ TfO ] − ) have been investigated by ATR-FTIR, NMR, TGA/D

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::105cc6c5552d20c8ca8aea6d51935d69
https://doi.org/10.1016/j.matchemphys.2021.124369

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Interactions between silica particles and poly(2-vinylpyridine) brushes in aqueous solutions of monovalent and multivalent salts

Autor: Petra Uhlmann, Manfred Stamm, Mahdy M. Elmahdy, Astrid Drechsler, Eva Bittrich

Publikováno v: Colloid and Polymer Science. 292:1999-2012

AFM colloidal probe technique, scratch tests, and spectroscopic ellipsometry are employed to study the conformation of a poly(2-vinyl pyridine) brush grafted to a planar surface and its interaction with microsized silica spheres in solutions containi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::21f28bd3cd3c0dec74d3249f071e8347
https://doi.org/10.1007/s00396-014-3291-z

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