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title = {{Complete composition tunability of {InGaN} nanowires using a combinatorial approach}},  journal = {Nat Mater},  }  @article{Hahn_2011,  doi = {10.1021/nn200521r},  url = {http://dx.doi.org/10.1021/nn200521r},  year = {2011},  month = {may},  publisher = {American Chemical Society ({ACS})},  volume = {5},  number = {5},  pages = {3970--3976},  author = {Christopher Hahn and Zhaoyu Zhang and Anthony Fu and Cheng Hao Wu and Yun Jeong Hwang and Daniel J. Gargas and Peidong Yang},  title = {{Epitaxial Growth of {InGaN} Nanowire Arrays for Light Emitting Diodes}},  journal = {{ACS} Nano},  }