Cited Article: Holt JK. Fast mass transport through sub-2-nanometer carbon nanotubes
Alert Expires: 18 OCT 2009
Number of Citing Articles: 1 new records this week (1 in this e-mail)
Organization ID: 3b97d1bbc1878baed0ab183d8b03130b
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AU Pint, CL
Kim, SM
Stach, EA
Hauge, RH
AF Pint, Cary L.
Kim, Seung Min
Stach, Eric A.
Hauge, Robert H.
TI Rapid and Scalable Reduction of Dense Surface-Supported Metal-Oxide
Catalyst with Hydrazine Vapor
SO ACS NANO
LA English
DT Article
DE hydrazine; catalysis; carbon nanotubes; chemical vapor deposition
ID WALLED CARBON NANOTUBES; ARRAY GROWTH; DEPOSITION; NANOWIRES; DIAMETER;
KINETICS; WATER; NUCLEATION; CARPETS; FORESTS
AB An efficient technique using hydrazine (N2H4) vapor as an agent for the
rapid reduction of high-density layers of catalytic nanoparticles is
demonstrated. With as little as 10 mTorr hydrazine bled into a thermal
chemical vapor deposition (CVD) apparatus, efficient reduction of
metal-oxide catalyst particles is achieved more rapidly than when using
atomic hydrogen as the reducing agent. Postreduction catalyst imaging
emphasizes the differences in nanoparticle formation under different
reduction environments, with the most uniform and compact catalyst size
distribution observed following hydrazine exposure. Low-temperature
reduction studies suggest that as little as 15 s N2H4 exposure at
temperatures of 350 degrees C can yield a reduced catalyst layer
preceding the synthesis of dense, aligned arrays of single-walled
carbon nanotubes (SWNT) with uniform height. This work demonstrates a
simple route toward scalable, vapor transport reduction of metal-oxide
catalyst relevant to a number of catalytic applications, including the
synthesis and selective synthesis of aligned SWNT arrays.
C1 [Hauge, Robert H.] Rice Univ, Dept Chem, Houston, TX 77251 USA.
[Pint, Cary L.] Rice Univ, Dept Phys & Astron, Houston, TX 77251 USA.
[Pint, Cary L.; Hauge, Robert H.] Rice Univ, Richard E Smalley Inst Nanoscale Sci & Technol, Houston, TX 77251 USA.
[Kim, Seung Min; Stach, Eric A.] Purdue Univ, Sch Mat Engn, W Lafayette, IN 47907 USA.
[Kim, Seung Min; Stach, Eric A.] Purdue Univ, Birck Nanotechnol Ctr, W Lafayette, IN 47907 USA.
RP Hauge, RH, Rice Univ, Dept Chem, POB 1892, Houston, TX 77251 USA.
EM hauge@rice.edu
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NR 32
TC 0
PU AMER CHEMICAL SOC; 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1936-0851
DI 10.1021/nn900225h
PD JUL
VL 3
IS 7
BP 1897
EP 1905
SC Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials
Science, Multidisciplinary
GA 474UZ
UT ISI:000268311000036
ER
EF
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