(untitled) - Green, J E; Wook Choi, J; Boukai, A; Bunimovich, Y; Johnston-Halperin, E; DeIonno, E; Luo, Y; Sheriff, B A; Xu, K; Shik Shin, Y; Tseng, H-R; Stoddart, J F; Heath, J R (Nature, 2007)