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Venkata R.S.S. Mokkapati: Graphene integrated polymeric membranes for ultrafiltration

posted 8 Aug 2014, 00:56 by Lisbeth Kirk Mynster
V.R.S.S. Mokkapati, Volkan Ozguz, SUNUM, Sabanci University, Istanbul, Turkey
Derya Y. Koseoglu-Imer, Ismail Koyuncu, MEM-TEK, Istanbul Technical University, Istanbul, Turkey

Graphene has the potential to re-define the pore parameters of a conventional ultrafiltration membrane. Due to its flexibility, mechanical strength and atomic thickness, graphene provides a platform for nano/sub nanometer pores for ionic filtration. In this work we would like to present the mechanisms involved in graphene integration/transfer with a polymer substrate, the overall effects of graphene on the properties of the membrane and initial results on textile dye filtration using these membranes.

In addition we also would like to present how water nanodroplets can be live imaged under a Transmission Electron Microscope (TEM) using graphene as a TEM window. This method can pave a way for new generation nanofluidic devices where bio-molecules can be imaged in their natural state. Nanodroplet condensation and water bubble dynamics have been observed and recorded by this method.

VRSS Mokkapati is currently a Marie Curie fellow at Nanotechnology Research and Application center, Sabanci University, Istanbul, Turkey. His current work involves in developing graphene integrated membranes for ultrafiltration of body fluids and Graphene for Transmission Electron Microscopy. He received his phd from Delft University of Technology, The Netherlands, where he worked on micro and nanofluidic devices for single cell and DNA analysis. Prior to joining Sabanci University he spent 2 years as a research fellow at Austrian Institute of Technology, Vienna, Austria, and National University of Singapore, Singapore, where he was working on disposable microfluidic devices and graphene for bio-medical applications and TEM respectively.