2007 NSTI Nanotechnology Conference and Trade Show - Nanotech 2007 - 10th Annual

Nanoparticle transport through carbon nanopipes

M. Whitby and N. Quirke
Imperial College, UK

Keywords:
nanofluidics, nanoparticle, transport, diffusion, flow, nanopipes

Abstract:
Experimental investigation of nanoparticle transport through carbon nanotubes and nanopipes is important from both theoretical and practical perspectives. Nanofluidic devices exploiting novel transport phenomena may have medical applications for drug delivery and diagnosis as well as applicability for high-throughput materials separation. However theory that applies at the microscale may need modification accurately to account for nanoscale transport where surface interactions dominate. This paper reports preliminary experimental data from studies of nanoparticle and macromolecule diffusion through 100-200nm carbon nanopipes produced using chemical vapour deposition in alumina templates. A range of variables are investigated including temperature, nanoparticle size, pore diameter and the chemical character of the interface. A novel method for continuous in situ fluorometric measurement of diffusion through carbon nanomembranes is presented. Diffusion coefficients are determined and compared with projections from macroscale models.

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