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title = {{{GaAs} Nanowire Array Solar Cells with Axial p{\textendash}i{\textendash}n Junctions}},  journal = {Nano Letters},  }  @article{Mariani_2011,  doi = {10.1021/nl200965j},  url = {http://dx.doi.org/10.1021/nl200965j},  year = {2011},  month = {jun},  publisher = {American Chemical Society ({ACS})},  volume = {11},  number = {6},  pages = {2490--2494},  author = {Giacomo Mariani and Ping-Show Wong and Aaron M. Katzenmeyer and Francois Le{\'}onard and Joshua Shapiro and Diana L. Huffaker},  title = {{Patterned Radial {GaAs} Nanopillar Solar Cells}},  journal = {Nano Letters},  }