@article {1340475, title = {A General Method for Patterning Gradients of Biomolecules on Surfaces Using Microfluidic Networks}, journal = {Analytical Chemistry}, volume = {77}, year = {2005}, note = {916}, month = {10/20/04}, pages = {2338-2347}, keywords = {ac048440m, accepted 1/25/05, some revisions needed...12/31/04}, author = {Jiang, X. and Xu, Q. and Dertinger, S. K. W. and Stroock, A. D. and Fu, T. and Whitesides, G. M.} }