Control of Micro-fluidics

Combined Pressure-Driven Flow and Electroosmotic Flow - Control of Micro-Fluidics... 

Control of Micro-fluidics, Fig. 2 Feedback control particle steering approach for a single particle. A micro-fluidic device with standard electroosmotic actuation is observed by a vision system that informs the control algorithm of the current particle position. The control... 

Control of Micro-fluidics, Fig. 3 Control of a bead with significant surface charge along a figure 8. The bead has an approximate electrophoretic mobility of c = (-57.3 5.6) X 10 m V s . (By comparison, the electro-osmotic mobility of our PDMS devices is = (36.5... 

Control of Micro-fluidics, Fig. 4 Steering of 3 yeast cells (5 (im diameter. Red Star, Giant Food) with small surface charge (electrophoretic mobility c = (—23.3 6.9) 10 m s ) around two circles and a UMD path (for University of Maryland ). The yeast cells are visible as small black dots with a white... 

Control of Micro-fluidics, Fig. 5 The EWOD system manipulates fluids by charging a dielectric layer underneath the liquid that effectively changes the local surface tension properties of the liquid/gas interface creating liquid motion. Existing (move, split, join, and mix) capabilities of electrowetting devices are shown schematically above alongside the new particle steering capability discussed in this entry. The view is from the top of the... 

Control of Micro-fluidics, Fig. 7 Particle following a figure 8 path. In the simulation results above, we have a droplet (denoted by the thick black curve) lying on a 3 X 3 grid of electrodes (denoted by the dashed lines). The blue dashed curve is the desired figure 8 path and a black dot represents the particle with a thick red... 

Control of Micro-fluidics, Fig. 8 Two-particle separation into two satellite drops (same format as in Fig. 7). Each particle first follows a trajectory that takes them away from each other. When there is sufficient distance... 

Armani M, Chaudhary S, Probst R, WalkerS, Shapiro B (2005) Control of micro-fluidic systems two examples, results, and challenges. Int J Robust Nonlinear Control 15 785-803... 

Control of Micro-Fluidics, Figure 1 A simple and classic feedback loop example. The system and controller are connected in a closed-loop by... 

---