Water Transport through Carbon Nanotubes with the Radial Breathing Mode

Zhang, Qilin; Jiang, Wei-Zhou; Liu, Jian; Miao, Rende; Sheng, Nan

doi:10.1103/physrevlett.110.254501

Cited by 64 publications

(64 citation statements)

References 54 publications

(62 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The P WC profiles are symmetric and P WC is enhanced slightly with increasing θ from 0º to 90º. 27,31,33 As such, 〈flux〉 increases as θ increases from 0º to 80º. Like P WW , the P total profiles are asymmetric and the value of P total reduces as θ increases.…”

Section: Resultsmentioning

confidence: 92%

“…On the other hand, simple nanochannels, such as single-walled carbon nanotubes (CNT) or single-walled boron nitride nanotubes, can be used as prototypes to study some primary properties of water molecules in these molecular channels. 25,26 Furthermore, the flux of water across the nanochannels can be well controlled by many factors, such as a stationary or vibratory external charge, [27][28][29][30][31] the deformation of the nanochannel, 32 the radial breathing mode vibration, 33 and a temperature difference. 23 In fact, water molecules can move unidirectionally through the nanochannels when an osmotic pressure exists.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tuning water transport through nanochannels by changing the direction of an external electric field

Zhu

Lan

et al. 2016

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The transport properties of water through a nanochannel influenced by the direction of an external electric field has been investigated by using molecular dynamics simulations. Water molecules flow unidirectionally across the nanochannel under a uniform external electric field without an osmotic pressure. It is found that the direction of the external field plays an important role in the interactions and dipole orientations of water molecules in the nanochannel, accordingly changing the net water flux dramatically. Most importantly, a critical angle (θC) between the external field and the nanochannel axis is found. The average net water flux increases as θ increases for θ≤θC but decreases sharply to a near-zero value for a further increase of θ. The maximum value of the average net water flux is 7.33 times as high as the value when the electric field is along the nanochannel axis. Our findings are of great practical importance for nanomolecular engineering, which provide a possible strategy for designing novel controllable water nanopumps.

show abstract

Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Tuning water transport through nanochannels by changing the direction of an external electric field

Zhu

Lan

et al. 2016

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Thus, if the nanotube cannot be fixed, the nanotube–fullerene system without an external excitation is not suited for oscillator applications. However, besides their use in oscillators, nanotubes can also be used as the channel for transporting different types of molecules . It is clear from Fig.…”

Section: Resultsmentioning

confidence: 99%

“…These properties have qualified them as a useful candidate for building integrated chips, biosensors, ion‐transport channels, nanoelectromechanical systems (NEMSs), and for a varied range of other usages . The latest technology of creating small open‐ended pipes out of nanotubes has also made them suitable as a channel for the transport of water, ions, and some other molecules like proteins, DNA, and peptides for the purpose of drug delivery . Geng et al reported stochastic nature of the transport of water, protons, small ions, and DNA through “CNT porins” and showed that the conductance and ion selectivity of the channel can be controlled in presence of local channel and membrane charges .…”

Section: Introductionmentioning

confidence: 99%

Effect of bending on the molecular transport along carbon nanotubes

Rahman

Chowdhury

Rosul

et al. 2016

Physica Status Solidi (b)

View full text Add to dashboard Cite

The effect of bending on the molecular transport and oscillation of carbon nanotube–fullerene‐based systems is investigated using molecular dynamics simulations. It is known that single‐walled carbon nanotubes demonstrate gradual buckling phenomenon under bending strain. In this work, we investigate the limit of bending curvature for successful transport of fullerene along a carbon nanotube for nanotube–fullerene‐based systems. We also analyze the behavior of nanotube transport through another nanotube for nanotube–nanotube‐based systems. The dependence of transport characteristics on the atomicity of the inner nanotube is also investigated in this regard. In addition, the effect of the outer nanotube's diameter and surface smoothness on the oscillation stability in relation to the oscillation property of the inner molecules has been studied for both systems.

show abstract

“…We note that, a majority of kinetic and dynamic processes related to molecules take place in nanoscale space [1][2][3][19][20][21][22] and accomplish in just several picoseconds [23,24], such as self-assembling [25][26][27][28][29], triggering chemical reaction [7,30], intercellular signal transduction [31], and neurotransmission [32]. Unfortunately, there is rare report on the unconventional behavior in the free motion of the molecules/nanoparticles solely under thermal fluctuations within short time at the nanoscale.On the other hand, molecular dynamics (MD) simulation has been widely accepted as a powerful tool for studying the dynamics of molecules at nanoscales [33][34][35][36][37][38][39][40][41][42]. Our recent atomistic MD simulations showed interesting anisotropic motion of small asymmetric solute molecules, such as methanol and glycine, in water solely due to thermal fluctuations, which indicates the existence of rich dynamic behavior of asymmetric molecules in nano-space at finite timescales [43,44].…”

mentioning

confidence: 86%

Asymmetric nanoparticle may go “active” at room temperature

Sheng

Guo

et al. 2017

Sci. China Phys. Mech. Astron.

Self Cite

View full text Add to dashboard Cite

Using molecular dynamics simulations, we show that an asymmetrically shaped nanoparticle in dilute solution possesses a spontaneously curved trajectory within finite time interval, instead of the generally expected random walk. This unexpected dynamic behavior has a similarity to that of active matters, such as swimming bacteria, cells or even fishes, but is of a different physical origin. The key to the curved trajectory lies in the non-zero resultant force originated from the imbalance of the collision forces acted by surrounding solvent molecules on the shaped nanoparticle during its orientation regulation. Theoretical formulae based on the microscopic observation have been derived to describe this non-zero force and the resulted motion of the nanoparticle.PACS number: 66.10.cg, 83.10.Rs, 87.90.+yThe motion of molecules caused by thermal fluctuations plays an essential role in determining the probability for them to meet targets upon functioning [1-4], as found in many physical processes [3,5], chemical reactions [6,7] and biological functioning [2,3]. In conventional theories, the molecules/particles have been treated as perfect spheres with their trajectories described as random walks, following the original work of Einstein [8][9][10][11]. However, it has been realized by Einstein himself that this picture will break down if we can inspect the motion of the particles at much smaller time and length scales [9]. Significant progresses have been made on investigating the motion of particles at micrometers and timescales from microseconds to seconds, showing unconventional behaviors within relatively short time interval [12][13][14][15][16][17][18]. Han et al. experimentally observed a crossover from short-time anisotropic to long-time isotropic diffusion behavior of ellipsoidal particles along different axial directions [12]. Huang et al. experimentally measured the mean-square displacement of a 1-µm-diameter silica sphere in water using optical trapping technique and found that the particle motion cannot be described by conventional theory until sufficiently long time [14]. We note that, a majority of kinetic and dynamic processes related to molecules take place in nanoscale space [1][2][3][19][20][21][22] and accomplish in just several picoseconds [23,24], such as self-assembling [25][26][27][28][29], triggering chemical reaction [7,30], intercellular signal transduction [31], and neurotransmission [32]. Unfortunately, there is rare report on the unconventional behavior in the free motion of the molecules/nanoparticles solely under thermal fluctuations within short time at the nanoscale.On the other hand, molecular dynamics (MD) simulation has been widely accepted as a powerful tool for studying the dynamics of molecules at nanoscales [33][34][35][36][37][38][39][40][41][42]. Our recent atomistic MD simulations showed interesting anisotropic motion of small asymmetric solute molecules, such as methanol and glycine, in water solely due to thermal fluctuations, which indicates the existence of rich dynamic be...

show abstract

Water Transport through Carbon Nanotubes with the Radial Breathing Mode

Cited by 64 publications

References 54 publications

Tuning water transport through nanochannels by changing the direction of an external electric field

Tuning water transport through nanochannels by changing the direction of an external electric field

Effect of bending on the molecular transport along carbon nanotubes

Asymmetric nanoparticle may go “active” at room temperature

Contact Info

Product

Resources

About