Cited Article: Holt JK. Fast mass transport through sub-2-nanometer carbon nanotubes
Alert Expires: 09 NOV 2010
Number of Citing Articles: 1 new records this week (1 in this e-mail)
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AU Tu, YS
Xiu, P
Wan, RZ
Hu, J
Zhou, RH
Fang, HP
AF Tu, Yusong
Xiu, Peng
Wan, Rongzheng
Hu, Jun
Zhou, Ruhong
Fang, Haiping
TI Water-mediated signal multiplication with Y-shaped carbon nanotubes
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
AMERICA
LA English
DT Article
DE confined water; molecular dynamics; molecular signal transmission;
Y-shaped nanochannel; signal transduction
ID MOLECULAR-DYNAMICS; CHANNEL; MECHANISM; TRANSPORT; CONDUCTION;
JUNCTIONS; ELECTRON; LOGIC; FLOW
AB Molecular scale signal conversion and multiplication is of particular
importance in many physical and biological applications, such as
molecular switches, nano-gates, biosensors, and various neural systems.
Unfortunately, little is currently known regarding the signal
processing at the molecular level, partly due to the significant noises
arising from the thermal fluctuations and interferences between branch
signals. Here, we use molecular dynamics simulations to show that a
signal at the single-electron level can be converted and multiplied
into 2 or more signals by water chains confined in a narrow Y-shaped
nanochannel. This remarkable transduction capability of molecular
signal by Y-shaped nanochannel is found to be attributable to the
surprisingly strong dipole-induced ordering of such water chains, such
that the concerted water orientations in the 2 branches of the Y-shaped
nanotubes can be modulated by the water orientation in the main
channel. The response to the switching of the charge signal is very
rapid, from a few nanoseconds to a few hundred nanoseconds.
Furthermore, simulations with various water models, including TIP3P,
TIP4P, and SPC/E, show that the transduction capability of the Y-shaped
carbon nanotubes is very robust at room temperature, with the
interference between branch signals negligible.
C1 [Zhou, Ruhong] IBM Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.
[Tu, Yusong; Xiu, Peng; Wan, Rongzheng; Hu, Jun; Fang, Haiping] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
[Tu, Yusong] Chinese Acad Sci, Grad Sch, Beijing 100080, Peoples R China.
[Xiu, Peng] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China.
[Zhou, Ruhong] Columbia Univ, Dept Chem, New York, NY 10027 USA.
RP Zhou, RH, IBM Thomas J Watson Res Ctr, Yorktown Hts, NY 10598 USA.
EM ruhongz@us.ibm.com
fanghaiping@sinap.ac.cn
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NR 42
TC 0
PU NATL ACAD SCIENCES; 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
DI 10.1073/pnas.0902676106
PD OCT 27
VL 106
IS 43
BP 18120
EP 18124
SC Multidisciplinary Sciences
GA 512DB
UT ISI:000271222500017
ER
EF
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