High Purity GaAs Nanowires Free of Planar Defects: Growth and Characterization - Joyce, H; Gao, Q; Tan, H; Jagadish, C; Kim, Y; Fickenscher, M; Perera, S; Hoang, T; Smith, L; Jackson, H; Yarrison-Rice, J; Zhang, X; et al. (ADVANCED FUNCTIONAL MATERIALS, 2008)