Controlled Molecular Transport through Nanofilters with Tapered and Cylindrical Pores

Date

2009-02-01

Author

İleri Ercan, Nazar
Wiederoder, Michael
Stroeve, Pieter
Letant, Sonia
Britten, Jerald
Hoang Nguyen, Hoang Nguyen
Larson, Cindy
Balhorn, Rodney
Shirk, Michael
Zaidi, Saleem
Palazoglu, Ahmet
Faller, Roland
Tringe, Joseph W.

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Many applications in molecular separation and sensing technology now require devices with uniformity at the nanometer scale over macroscopic areas. Advanced methods for fabrication and manipulation of such artificial tools can greatly increase process speed, selectivity and efficiency. In this work, we present a new synthesis technique for creating ∼mm2 arrays of uniformly tapered nanopores. We investigate the effect of pore size (50-800nm), geometry and surface functionalization on diffusion rates of biomolecules through synthesized membranes. Results are compared against state-of-the-art polycarbonate track etched (PCTE) membranes and other filter technologies. Mass transfer rates are shown to increase up to 15x with tapered geometries compared to cylindrical geometries. Experimental results are supported with molecular calculations.

URI

https://hdl.handle.net/11511/107959

Collections

Department of Chemical Engineering, Article