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 |
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ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
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
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TY - GEN
T1 - Carbon nanotube-based permeable membranes
AU - Holt, Jason K.
AU - Park, Hyung Gyu
AU - Bakajin, Olgica
AU - Noy, Aleksandr
AU - Huser, Thomas R
AU - Eaglesham, David
PY - 2004
Y1 - 2004
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).
UR - http://www.scopus.com/inward/record.url?scp=14944361685&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=14944361685&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:14944361685
VL - 820
SP - 83
EP - 88
BT - Materials Research Society Symposium Proceedings
A2 - Liu, J.
A2 - McIlroy, D.
A2 - Merhari, L.
A2 - Pendry, J.P.
A2 - Borenstein, J.T.
A2 - Grodzinski, P.
A2 - Lee, L.P.
A2 - Wang, Z.L.
ER -