METHOD FOR APPLYING A pH GRADIENT TO A MICROCHANNEL DEVICE

摘要

Method for controlled application of a composition gradient to a surface in a microfluidic scale via controlled targeting of droplets of different solutions to a surface region, are disclosed. The methods are especially useful for delivering a gradient of first and second solutions to a microchannel within a microchannel device, represented by Figure 2, by targeting droplets of the different solutions A and B to a surface region within or adjacent an opening of the microchannel.