@article {1340831, title = {Macroscopic, Hierarchical Two-Dimensional Self-Assembly}, journal = {Angew. Chem. Int. Ed. Engl.}, volume = {38}, year = {1999}, note = {674}, pages = {3078-3081}, keywords = {Z13218}, author = {Choi, I. S. and Bowden, N. B. and Whitesides, G. M.} }