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Enhanced Liquid Flow in Nanofluidics through Carbon Nanotube Membranes

Enhanced Liquid Flow in Nanofluidics through Carbon Nanotube Membranes. Phys570x Proposal presentation. Yihong Liu Department of Physics, Purdue University April, 22nd , 2009. Outline. Brief overview; Background and motivation; Research objectives; Experimental details and methods;

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Enhanced Liquid Flow in Nanofluidics through Carbon Nanotube Membranes

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  1. Enhanced Liquid Flow in Nanofluidics through Carbon Nanotube Membranes Phys570x Proposal presentation Yihong Liu Department of Physics, Purdue University April, 22nd , 2009

  2. Outline • Brief overview; • Background and motivation; • Research objectives; • Experimental details and methods; • Resources; • Summary. Yihong Liu

  3. Brief overview • Apply carbon nanotube membrane (CNTM) as flow channels to design nanofluidics experiments; • Enhance liquid flow rate for molecule or ion fast transport. Yihong Liu

  4. h Background and motivation • Carbon nanotube membrane (CNTM), hollow core, inter diameter as small as ~1 nm. • Biosensing, biological cellular channel study, chemical selectivity, chemical separations, drug delivery, wastewater remediation. Aligned Multiwalled Carbon Nanotube Membranes, B. J. Hinds, et al. Science, Jan. 2004; Vol. 303. no. 5654, pp. 62 - 65 Yihong Liu

  5. Background and motivation • Little is known about the behavior of fluidics in nano scale, differing from continuum transport. • A number of molecular dynamics simulations have been made, however, lacking experimental verifications. • B. J. Hinds et al. (Science 2004) is the 1st experimental study of nanofluidics, demonstrating gas and ionic transport through carbon nanotube membranes Yihong Liu

  6. Background and motivation • Two papers reported about enhanced liquid flow (fast transport), • Enhanced flow in carbon nanotubes, M. Majumder, et al., NATURE, Vol 438, (Nov. 2005), • Fast Mass Transport Through Sub–2-Nanometer Carbon Nanotubes, J. K. Holt et al., Science 312, 1034 (2006) • The liquid flow through CNTM 4 to 5 orders of magnitude faster than the prediction of conventional flow theory. (frictionless interface) • Biological channels are selective and have extremely rapid transport. Yihong Liu

  7. Research objectives • Experimentally study nanofluidics through hydrophilic (silicon nitride) and hydrophobic (carbon nanotube ) versions of membrane; • Experimentally study enhanced liquid flow through CNM, (flow rate, pore size, solvents, pressure drop, external conditions, e.g.. electrical field ); • Applying enhanced liquid flow to molecular or ion separation. Yihong Liu

  8. Details and methods Scheme of CNM fabrication Fabrication of a Carbon Nanotube-Embedded Silicon Nitride Membrane for Studies of Nanometer-Scale Mass Transport, J. Holt, et al., Nano Letters, 2004, 4 (11), 2245-2250 Yihong Liu

  9. Details and methods Scheme of flow setup • Enhanced flow in carbon nanotubes, M. Majumder, et al., NATURE, Vol 438, (Nov. 2005), Yihong Liu

  10. Resources • Birck Nanotechnology Center – Purdue University Discovery Park. • Crystal growth and deposition systems, • Atomic force and electron microscopy, • Cleaning room, • Dry and wet etching. • Flow pump and flow cell Yihong Liu

  11. Summary • Carbon nanotube membrane (CNTM) provides a platform for nanofluidics study; • Nanofluidics is central to many scientific and engineering fields, (biology, chemistry, water filtering, and so on ); • Objectives are to enhance nano-liquid flow through CNTM and the application in molecular or ion fast seperation. Yihong Liu

  12. Thank you!Questions?

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