Analysing thermophoretic transport of water for designing nanoscale-pumps

2018 ◽  
Vol 20 (48) ◽  
pp. 30321-30330 ◽  
Author(s):  
Rakesh Rajegowda ◽  
Sarith P. Sathian
Keyword(s):  
Carbon Nanotube ◽  
Water Transport ◽  
Thermal Gradient

The net flow of water through a thermal nanopump is linearly dependent on the imposed thermal gradient of the carbon nanotube, leading to controlled water transport.

Nanoscale Continuous Directional Motion Driven by a Cyclic Thermal Field

2021 ◽  
pp. 1-19
Author(s):  
Yichang Chen ◽  
Jiantao Leng ◽  
Zhengrong Guo ◽  
Yingyan Zhang ◽  
Tienchong Chang
Keyword(s):  
Carbon Nanotube ◽  
Thermal Gradient ◽  
Thermal Field ◽  
Joint Actions ◽  
Thermal Fields ◽  
Heating Region ◽  
Directional Motion ◽  
Gradient Forces ◽  
Controllable Motion ◽  
Novel Devices

Abstract Directional motion plays a crucial role in various mechanical systems. Although mechanisms for nanoscale directional motion have been widely used in many aspects of nanotechnology, it remains a great challenge to generate continuous and controllable motion at the nanoscale. Herein we propose a nanoscale continuous directional motion in cyclic thermal fields by using a double-walled system which consists of an outer BN/C heterojunction nanotube and a concentric inner carbon nanotube (CNT). By manipulating the heating region of the outer BN/C heterojunction tube, the continuous motion of the inner CNT can be realized with ease. The inner CNT demonstrates three distinct movements due to the joint actions of the asymmetric thermal gradient forces and interlayer attraction forces caused by the presence of the outer BN/C heterojunction nanotube. The mechanism revealed in the present study may be useful in designing novel devices for energy conversion and directional transportation.

Nanoscopic insights of saline water in carbon nanotube appended filters using molecular dynamics simulations

2019 ◽  
Vol 21 (16) ◽  
pp. 8529-8542 ◽  
Author(s):  
Pooja Sahu ◽  
Sk. Musharaf Ali ◽  
K. T. Shenoy ◽  
S. Mohan
Keyword(s):  
Molecular Dynamics ◽  
Carbon Nanotube ◽  
Molecular Dynamics Simulations ◽  
Water Transport ◽  
Saline Water ◽  
High Salt ◽  
Salt Rejection ◽  
Dynamics Simulations ◽  
Very High

Nanotube appended membranes are shown to be very promising due to their ultrafast water transport and very high salt rejection ability.

Carbon-Nanotube-Based Motor Driven by a Thermal Gradient

2013 ◽  
Vol 117 (6) ◽  
pp. 3109-3113 ◽  
Author(s):  
I. Santamaría-Holek ◽  
D. Reguera ◽  
J. M. Rubi
Keyword(s):  
Carbon Nanotube ◽  
Thermal Gradient

Resistance of water transport in carbon nanotube membranes

Nanoscale ◽  
2018 ◽  
Vol 10 (27) ◽  
pp. 13242-13249 ◽  
Author(s):  
Xin Zhang ◽  
Wei Zhou ◽  
Fang Xu ◽  
Mingjie Wei ◽  
Yong Wang
Keyword(s):  
Carbon Nanotube ◽  
Water Transport ◽  
Interfacial Resistance ◽  
Nanotube Membranes ◽  
Pore Mouth ◽  
Carbon Nanotube Membranes

Identifying the sources of interfacial resistance and depressing it by using an hourglass-shaped pore mouth.

scholarly journals Comment on “Enhanced water permeability and tunable ion selectivity in subnanometer carbon nanotube porins”

Science ◽  
2018 ◽  
Vol 359 (6383) ◽  
pp. eaap9173 ◽  
Author(s):  
Andreas Horner ◽  
Peter Pohl
Keyword(s):  
Activation Energy ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Water Transport ◽  
Water Permeability ◽  
Ion Selectivity ◽  
Membrane Interface ◽  
Single File ◽  
Lower Activation ◽  
Lower Activation Energy

Tunuguntla et al. (Reports, 25 August 2017, p. 792) report that permeation of single-file water occurs faster through carbon nanotubes than through aquaporins. We show that this conclusion violates fundamental thermodynamic laws: Because of its much lower activation energy, aquaporin-mediated water transport must be orders of magnitude faster. Leakage at the nanotube-membrane interface may explain the discrepancy.

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