Other Publications (1)
Articles by Anita Rogacs in JoVE
On-chip Isotachophoresis for Separation of Ions and Purification of Nucleic Acids Giancarlo Garcia-Schwarz1, Anita Rogacs1, Supreet S. Bahga1, Juan G. Santiago1 1Mechanical Engineering, Stanford University Isotachophoresis (ITP) is a robust electrokinetic separation and preconcentration technique with applications ranging from toxin detection to sample preparation. We review the physical principles of ITP and the methodology of applying this technique to two specific example applications: separation and detection of small molecules and purification of nucleic acids from cell culture lysate.
Other articles by Anita Rogacs on PubMed
Characterization of the Wettability of Thin Nanostructured Films in the Presence of Evaporation Journal of Colloid and Interface Science. Sep, 2010 | Pubmed ID: 20579656 Vapor chambers using conventional porous membrane wicks offer limited heat transfer rates for a given thickness. This limitation can be addressed through wick nanostructuring, which promises high capillary pressures and precise control of the local porosity. This work develops a measurement technique for the wettability of nanostructured wicks based on optical imaging. Feasibility is demonstrated on a hydrophilic silicon nanowire array (SiNW) synthesized using the Vapor-Liquid-Solid (VLS) growth mechanism followed by surface plasma treatment. The wettability is determined by comparing the time-dependent liquid interface rise with a model that accounts for capillary, viscous, and gravitational forces and for evaporation. This model is demonstrated to be useful in extracting internal contact angle from thin ( approximately 10microm) porous films.