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Title: Controlling water flow inside carbon nanotube with lipid membranes

Understanding and controlling the transportation of water molecules across carbon nanotube (CNT) is of great importance in bio-nanotechnology. In this paper, we systematically investigate the water transporting behaviors (i.e., water flow rate) inside the CNT in the presence of lipid membranes by using all atom molecular dynamic simulations. Our results show that the hydrophilicity of CNT as well as membrane thickness can have important impacts on the water flow rate. Interestingly, since the membrane thickness is temperature-dependent, the water flow rate can exhibit thermo-responsive behaviors. Further, we also provide insights into the effect of CNT on lipid membranes. It is found that all CNTs can increase the lipid tail order parameters and thicken the membrane at 320 K; while these effects are not obvious at 290 K. Importantly, we observe that the CNT with specific hydrophobicity has the least effect on membranes. The present study may give some useful advice on future experimental design of novel devices and sensors.
Authors:
;  [1] ;  [1] ;  [2]
  1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093 (China)
  2. (China)
Publication Date:
OSTI Identifier:
22419870
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Chemical Physics; Journal Volume: 141; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ATOMS; CARBON NANOTUBES; FLOW RATE; LIPIDS; MEMBRANES; MOLECULES; ORDER PARAMETERS; SENSORS; SIMULATION; TEMPERATURE DEPENDENCE; THICKNESS; WATER