Electroosmotic flow control in microfluidic chips using a self-assembled monolayer as the insulator of a flow field-effect transistor.
A novel concept for electroosmotic flow (EOF) control in a microfluidic chip is presented by using a self-assembled monolayer as the insulator of a flow field-effect transistor. Bidirectional EOF control with mobility values of 3.4 × 10(-4) and -3.1 × 10(-4) cm(2)/V s can be attained, corresponding to the applied gate voltage at -0.8 and 0.8 V, respectively, without the addition of buffer additives. A relatively high control factor (approximately 400 × 10(-6) cm(2)/V(2) s) can be obtained. The method presented in this study offers a simple strategy to control the EOF.
Department of Biomedical Engineering, National Cheng Kung University, Tainan, Taiwan.
Li-Chia
LC
Chen
Ching-Chou
CC
Wu
Ren-Guei
RG
Wu
Hsien-Chang
HC
Chang
D002021:Buffers; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D053841:Electroosmosis / Q000592:standards*; D006863:Hydrogen-Ion Concentration; D046210:Microfluidic Analytical Techniques / Q000592:standards*; D044085:Microfluidics / Q000379:methods*; D014173:Transistors, Electronic
D002021:Buffers; D004129:Dimethylpolysiloxanes; C013830:baysilon