In this dissertation, rapid capture and concentration of two different and representative types of virus particles (Sindbis virus and bacteriophage M13) with gradient insulator-based DEP (g-iDEP) has been demonstrated. Sindbis virus has a near-spherical shape with a diameter ~68 nm, while bacteriophage M13 has a filamentous shape with a length ~900 nm and a diameter ~6 nm. Under specific g-iDEP experimental conditions, the concentration of Sindbis virus can be increased two to six times within only a few seconds, using easily accessible voltages as low as 70 V. A similar phenomenon is also observed with bacteriophage M13. Meanwhile, their different DEP behavior predicts the potential of separating viruses with carefully designed microchannels and choices of experimental condition.
DEP-based microfluidics also shows great potential in manipulating blood samples, specifically rapid separations of blood cells and proteins. To investigate the ability of g-iDEP device in blood sample manipulation, some proofs of principle work was accomplished including separating two cardiac disease-related proteins (myoglobin and heart-type fatty acid binding protein) and red blood cells (RBCs). Consistent separation was observed, showing retention of RBCs and passage of the two spiked protein biomarkers. The numerical concentration of RBCs was reduced (~70 percent after one minute) with the purified proteins available for detection or further processing. This study explores and extends the use of the device from differentiating similar particles to acting as a sample pretreatment step.
This thesis focuses on Bram Stoker’s 1897 British novel 'Dracula' and its association of medical technology with a myriad of Victorian British societal anxieties, facilitating an examination of current and historical fears about medical intervention and medical innovation. Dracula’s parallel yet opposite portrayals of blood transfusion and vampirism allow fears of medical technology to be exaggerated and explored within the realm of the supernatural. In Dracula and today, the desire to restore the health of ourselves and our loved ones is accompanied by fears that medical treatment will cause harm; will reshape our conceptualization of death and thus our relationship with death; and, as new technologies with unestablished consequences are employed, that medical intervention may in fact erode our basic identity and humanity.