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Alexander Alekseev
Researcher at Nazarbayev University
Publications - 34
Citations - 934
Alexander Alekseev is an academic researcher from Nazarbayev University. The author has contributed to research in topics: Conductive atomic force microscopy & Graphene. The author has an hindex of 13, co-authored 33 publications receiving 841 citations. Previous affiliations of Alexander Alekseev include University of Glasgow & Kazan Federal University.
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Journal ArticleDOI
Determining the optimum morphology in high-performance polymer-fullerene organic photovoltaic cells
Gordon J. Hedley,Alexander J. Ward,Alexander Alekseev,Calvyn Travis Howells,Emiliano R. Martins,Luis A. Serrano,Graeme Cooke,Arvydas Ruseckas,Ifor D. W. Samuel +8 more
TL;DR: This work uses nanoscale photocurrent mapping, ultrafast fluorescence and exciton diffusion to observe the detailed morphology of a high-performance blend of PTB7:PC71BM, and shows that optimized blends consist of elongated fullerene-rich and polymer-rich fibre-like domains.
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Latex-based concept for the preparation of graphene-based polymer nanocomposites
TL;DR: In this paper, aqueous dispersions of graphene are obtained viaoxidation and exfoliation of graphite and subsequent reduction in the presence of surfactant, and the quality of the prepared nanofillers is characterized by atomic force microscopy (AFM).
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Local Organization of Graphene Network Inside Graphene/Polymer Composites
Alexander Alekseev,Delei D Chen,E Evgeniy Tkalya,Marcos Gomes Ghislandi,Yuliya V. Syurik,Oleg A. Ageev,Joachim Loos +6 more
TL;DR: In this article, the conductive graphene network can be separated from electrically isolated graphene sheets (GS) by analyzing the same area with electrostatic force microscopy (EFM) and conductive atomic force microscope (C-AFM).
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Experimental and Theoretical Study of the Influence of the State of Dispersion of Graphene on the Percolation Threshold of Conductive Graphene/Polystyrene Nanocomposites
E Evgeniy Tkalya,Marcos Gomes Ghislandi,Ronald H. J. Otten,Mustafa Lotya,Alexander Alekseev,Paul van der Schoot,Paul van der Schoot,Jonathan N. Coleman,CE Cor Koning +8 more
TL;DR: The effect of the dispersed state of graphene is studied as a factor influencing the electrical percolation threshold of graphene/polystyrene nanocomposites and theory and experimental results agree qualitatively.
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Three‐dimensional Electrical Property Mapping with Nanometer Resolution
TL;DR: The conductivity behavior of MWCNT networks within the volume of polymer nanocomposite samples is analyzed with nanometer resolution in all three dimensions and it is demonstrated that close to but above the percolation threshold for electrical conduction most of the M WCNTs do not contribute to the conductive network within the nanocomposition.