scholarly journals Impact of PEG additives and pore rim functionalization on water transport through sub-1 nm carbon nanotube porins

2018 ◽  
Vol 209 ◽  
pp. 359-369 ◽  
Author(s):  
Ramya H. Tunuguntla ◽  
Andrew Y. Hu ◽  
Yuliang Zhang ◽  
Aleksandr Noy
Keyword(s):  
Carbon Nanotube ◽  
Water Transport ◽  
Lipid Membrane ◽  
High Water ◽  
The Past ◽  
Membrane Matrix ◽  
Ion Selectivities

In the past, sub-1 nm diameter carbon nanotube porins embedded in a lipid membrane matrix demonstrated extremely high water permeabilities and strong ion selectivities. In this work, we explore additional factors that influence transport in these channels.

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

Science ◽  
2018 ◽  
Vol 359 (6383) ◽  
pp. eaaq1241 ◽  
Author(s):  
Ramya H. Tunuguntla ◽  
Yuliang Zhang ◽  
Robert Y. Henley ◽  
Yun-Chiao Yao ◽  
T. Anh Pham ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Experimental Evidence ◽  
Water Transport ◽  
Water Permeability ◽  
Transport Mechanism ◽  
Ion Selectivity ◽  
High Water ◽  
Arrhenius Factor ◽  
Rule Out

Horner and Pohl argue that high water transport rates reported for carbon nanotube porins (CNTPs) originate from leakage at the nanotube-bilayer interface. Our results and new experimental evidence are consistent with transport through the nanotube pores and rule out a defect-mediated transport mechanism. Mechanistic origins of the high Arrhenius factor that we reported for narrow CNTPs at pH 8 require further investigation.

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.

scholarly journals Core Ideas of the Application and Research of the Construction Technology of the Foundation Slab Concrete of the Building Foundation

2020 ◽  
Vol 165 ◽  
pp. 04020
Author(s):  
Liu Zhi Jiao
Keyword(s):  
Construction Industry ◽  
Social Economy ◽  
High Water ◽  
Construction Technology ◽  
Foundation Slab ◽  
Building Technology ◽  
The Past ◽  
Building Foundation ◽  
Important Position ◽  
Specific Construction

Since our country entered the 21st century, our country’s social economy has achieved remarkable achievements compared with the past, and the economic development has accelerated significantly. This has created good conditions for the healthy and sustainable development of the entire construction industry. Especially in recent years, the construction industry has occupied an increasingly important position. At present, with the advancement and development of science and technology, China’s building technology has achieved better development than before. Various modern buildings have emerged continuously, and the construction of foundation slab concrete has emerged. With its own various characteristics, in the specific construction, it is necessary to strengthen the attention to various construction problems, such as easy cracking, large shrinkage and high water heating, etc. At the same time, it is necessary to combine specific construction standards and pay attention to research on related construction technology can promote the overall and steady improvement of the overall project quality.

scholarly journals Vertically Aligned Carbon Nanotube Membranes: Water Purification and Beyond

Membranes ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 273
Author(s):  
Jeong Hoon Lee ◽  
Han-Shin Kim ◽  
Eun-Tae Yun ◽  
So-Young Ham ◽  
Jeong-Hoon Park ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Water Purification ◽  
Water Permeability ◽  
Proton Exchange Membrane ◽  
Antibacterial Properties ◽  
High Water ◽  
Proton Exchange ◽  
Conductive Membranes ◽  
Potential Applications ◽  
Vertically Aligned

Vertically aligned carbon nanotube (VACNT) membranes have attracted significant attention for water purification owing to their ultra-high water permeability and antibacterial properties. In this paper, we critically review the recent progresses in the synthesis of VACNT arrays and fabrication of VACNT membrane methods, with particular emphasis on improving water permeability and anti-biofouling properties. Furthermore, potential applications of VACNT membranes other than water purification (e.g., conductive membranes, electrodes in proton exchange membrane fuel cells, and solar electricity–water generators) have been introduced. Finally, future outlooks are provided to overcome the limitations of commercialization and desalination currently faced by VACNT membranes. This review will be useful to researchers in the broader scientific community as it discusses current and new trends regarding the development of VACNT membranes as well as their potential applications.

Soot Activation Energy for a Xylene-Fueled CVD Reactor

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
Wahed Wasel ◽  
Kazunori Kuwana ◽  
Kozo Saito
Keyword(s):  
Activation Energy ◽  
Carbon Nanotube ◽  
Species Composition ◽  
Gas Phase ◽  
Inverse Method ◽  
Soot Formation ◽  
Effect Of Temperature ◽  
Gas Phase Reactions ◽  
Concentration Data ◽  
The Past

The past attempts of Arrhenius plots of carbon nanotube (CNT) yield (or CNT length) to obtain the overall activation energy for CNT formation under changing reaction temperature conditions have created substantial errors. Here we propose an inverse method to accurately account for the effect of temperature on gas-phase reactions and species composition. The overall activation energy of soot formation for a xylene-based CVD reactor was calculated and successfully compared with the measured gas-phase concentration data. Our proposed inverse method is expected to help improve the performance of CVD reactors and optimize its design.

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