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Fabrication of One Dimensional Zig-Zag [6,6]-Phenyl-C61-butyric acid methyl ester Nanoribbons from Two Dimensional Nanosheets

Gracia-Espino, Eduardo (Umea University, Department of Physics, Umea, SWE); Barzegar, Hamid (Department of Physics, UC Berkeley, USA, Berkeley, USA); Yan, Aiming (Department of Physics, UC Berkeley, USA, Berkeley, USA); Zettl, Alex (Department of Physics, UC Berkeley, USA, Berkeley, USA); Wagberg, Thomas (Umea University, Department of Physics, Umea, SWE)

One-dimensional (1D) zig-zag [6,6]-Phenyl-C61-butyric acid methyl ester (PCBM) nanoribbons are produced by folding two-dimensional ultrathin PCBM nanosheets in a simple solvent process. The unique 1D PCBM nanostructures exhibit uniform width of 3.8 ± 0.3 nm, equivalent to four PCBM molecules, and lengths of 20-400 nm. These nanoribbons show well-defined crystalline structure, comprising PCBM molecules in a hexagonal arrangement without trapped solvent molecules. First principle calculations and detailed experimental characterization provides an insight into the structure and formation mechanism of the 1D PCBM nanoribbons. Given their dimensions and physical properties, we foresee that these nanostructures should be ideal as acceptor material in organic solar cells.

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