Carbon nanotube-based permeable membranes

Jason K. Holt; Hyung Gyu Park; Olgica Bakajin; Aleksandr Noy; Thomas R Huser; David Eaglesham

Carbon nanotube-based permeable membranes

Jason K. Holt, Hyung Gyu Park, Olgica Bakajin, Aleksandr Noy, Thomas R Huser, David Eaglesham

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A membrane of multiwall carbon nanotubes embedded in a silicon nitride matrix was fabricated for use in studying fluid mechanics on the nanometer scale. Characterization by fluorescent tracer diffusion and scanning electron microscopy suggests that the membrane is void-free near the silicon substrate on which it rests, implying that the hollow core of the nanotube is the only conduction path for molecular transport. Assuming Knudsen diffusion through this nanotube membrane, a maximum helium transport rate (for a pressure drop of 1 atm) of 0.25 cc/sec is predicted. Helium flow measurements of a nanoporous silicon nitride membrane, fabricated by sacrificial removal of carbon, give a flow rate greater than 1×10 ^-6 cc/sec. For viscous, laminar flow conditions, water is estimated to flow across the nanotube membrane (under a 1 atm pressure drop) at up to 2.8×10 ^-5 cc/sec (1.7 μL/min).

Original language	English (US)
Title of host publication	Materials Research Society Symposium Proceedings
Editors	J. Liu, D. McIlroy, L. Merhari, J.P. Pendry, J.T. Borenstein, P. Grodzinski, L.P. Lee, Z.L. Wang
Pages	83-88
Number of pages	6
Volume	820
State	Published - 2004
Externally published	Yes
Event	Nanoengineered Assemblies and Advanced Micro/Nanosystems - San Francisco, CA, United States Duration: Apr 13 2004 → Apr 16 2004

Other

Other	Nanoengineered Assemblies and Advanced Micro/Nanosystems
Country	United States
City	San Francisco, CA
Period	4/13/04 → 4/16/04

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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Cite this

Carbon nanotube-based permeable membranes. / Holt, Jason K.; Park, Hyung Gyu; Bakajin, Olgica; Noy, Aleksandr; Huser, Thomas R; Eaglesham, David.

Materials Research Society Symposium Proceedings. ed. / J. Liu; D. McIlroy; L. Merhari; J.P. Pendry; J.T. Borenstein; P. Grodzinski; L.P. Lee; Z.L. Wang. Vol. 820 2004. p. 83-88 O4.3.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Holt, JK, Park, HG, Bakajin, O, Noy, A, Huser, TR & Eaglesham, D 2004, Carbon nanotube-based permeable membranes. in J Liu, D McIlroy, L Merhari, JP Pendry, JT Borenstein, P Grodzinski, LP Lee & ZL Wang (eds), Materials Research Society Symposium Proceedings. vol. 820, O4.3, pp. 83-88, Nanoengineered Assemblies and Advanced Micro/Nanosystems, San Francisco, CA, United States, 4/13/04.

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abstract = "A membrane of multiwall carbon nanotubes embedded in a silicon nitride matrix was fabricated for use in studying fluid mechanics on the nanometer scale. Characterization by fluorescent tracer diffusion and scanning electron microscopy suggests that the membrane is void-free near the silicon substrate on which it rests, implying that the hollow core of the nanotube is the only conduction path for molecular transport. Assuming Knudsen diffusion through this nanotube membrane, a maximum helium transport rate (for a pressure drop of 1 atm) of 0.25 cc/sec is predicted. Helium flow measurements of a nanoporous silicon nitride membrane, fabricated by sacrificial removal of carbon, give a flow rate greater than 1×10 -6 cc/sec. For viscous, laminar flow conditions, water is estimated to flow across the nanotube membrane (under a 1 atm pressure drop) at up to 2.8×10 -5 cc/sec (1.7 μL/min).",

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AU - Holt, Jason K.

AU - Park, Hyung Gyu

AU - Bakajin, Olgica

AU - Noy, Aleksandr

AU - Huser, Thomas R

AU - Eaglesham, David

PY - 2004

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N2 - A membrane of multiwall carbon nanotubes embedded in a silicon nitride matrix was fabricated for use in studying fluid mechanics on the nanometer scale. Characterization by fluorescent tracer diffusion and scanning electron microscopy suggests that the membrane is void-free near the silicon substrate on which it rests, implying that the hollow core of the nanotube is the only conduction path for molecular transport. Assuming Knudsen diffusion through this nanotube membrane, a maximum helium transport rate (for a pressure drop of 1 atm) of 0.25 cc/sec is predicted. Helium flow measurements of a nanoporous silicon nitride membrane, fabricated by sacrificial removal of carbon, give a flow rate greater than 1×10 -6 cc/sec. For viscous, laminar flow conditions, water is estimated to flow across the nanotube membrane (under a 1 atm pressure drop) at up to 2.8×10 -5 cc/sec (1.7 μL/min).

AB - A membrane of multiwall carbon nanotubes embedded in a silicon nitride matrix was fabricated for use in studying fluid mechanics on the nanometer scale. Characterization by fluorescent tracer diffusion and scanning electron microscopy suggests that the membrane is void-free near the silicon substrate on which it rests, implying that the hollow core of the nanotube is the only conduction path for molecular transport. Assuming Knudsen diffusion through this nanotube membrane, a maximum helium transport rate (for a pressure drop of 1 atm) of 0.25 cc/sec is predicted. Helium flow measurements of a nanoporous silicon nitride membrane, fabricated by sacrificial removal of carbon, give a flow rate greater than 1×10 -6 cc/sec. For viscous, laminar flow conditions, water is estimated to flow across the nanotube membrane (under a 1 atm pressure drop) at up to 2.8×10 -5 cc/sec (1.7 μL/min).

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