@article {1340248, title = {Generation of Solution and Surface Gradients Using Microfluidic Systems}, journal = {Langmuir}, volume = {16}, year = {2000}, note = {699}, pages = {8311-8316}, author = {Jeon, N. L. and Dertinger, S. K. W. and Chiu, D. T. and Choi, I. S. and Stroock, A. D. and Whitesides, G. M.} }