Understanding Water Slippage Through Carbon Nanotubes

2021 ◽  
Author(s):  
Cong Ma ◽  
Yun Chen ◽  
Guo En Sun ◽  
Quan Ming Li ◽  
Wang Gao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Effective Scheme ◽  
Formidable Challenge ◽  
Fundamental Research

It presents a formidable challenge to understand water slippage through carbon nanotubes (CNTs), despite its great significance in fundamental research and technology. Herein, we propose an effective scheme to describe...

scholarly journals Dispersion of Carbon Nanotubes with “Green” Detergents

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2908
Author(s):  
Kazuo Umemura ◽  
Ryo Hamano ◽  
Hiroaki Komatsu ◽  
Takashi Ikuno ◽  
Eko Siswoyo
Keyword(s):  
Carbon Nanotubes ◽  
Sodium Dodecyl ◽  
Detergent Solution ◽  
Absorbance Spectroscopy ◽  
Fundamental Research ◽  
The Stability ◽  
Single Walled Cnts ◽  
Better Than ◽  
Walled Cnts ◽  
Cnt Suspensions

Solubilization of carbon nanotubes (CNTs) is a fundamental technique for the use of CNTs and their conjugates as nanodevices and nanobiodevices. In this work, we demonstrate the preparation of CNT suspensions with “green” detergents made from coconuts and bamboo as fundamental research in CNT nanotechnology. Single-walled CNTs (SWNTs) with a few carboxylic acid groups (3–5%) and pristine multi-walled CNTs (MWNTs) were mixed in each detergent solution and sonicated with a bath-type sonicator. The prepared suspensions were characterized using absorbance spectroscopy, scanning electron microscopy, and Raman spectroscopy. Among the eight combinations of CNTs and detergents (two types of CNTs and four detergents, including sodium dodecyl sulfate (SDS) as the standard), SWNTs/MWNTs were well dispersed in all combinations except the combination of the MWNTs and the bamboo detergent. The stability of the suspensions prepared with coconut detergents was better than that prepared with SDS. Because the efficiency of the bamboo detergents against the MWNTs differed significantly from that against the SWNTs, the natural detergent might be useful for separating CNTs. Our results revealed that the use of the “green” detergents had the advantage of dispersing CNTs as well as SDS.

1D P-Block Halide Crystals Confined into Single Walled Carbon Nanotubes

2000 ◽  
Vol 633 ◽  
Author(s):  
E. Flahaut ◽  
J. Sloan ◽  
K.S. Coleman ◽  
V.C. Williams ◽  
S. Friedrichs ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Carbon Nanotubes ◽  
Materials Chemistry ◽  
Formidable Challenge ◽  
Transmission Electron ◽  
Cscl Type ◽  
Methane Mixture ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Image Simulations

AbstractThe synthesis and characterisation of one-dimensional (1D) crystals that have a well-specified chemistry, size and crystal structure have presented a formidable challenge for materials chemistry and analysis. We report here the filling of single (SWNTs) and double walled carbon nanotubes (DWNTs) by two different p-block halides, TlCl and PbI2. The nanotubes were produced either by the arc synthesis [1] or by a CVD method [2], based on the reduction of a Mg0.9Co0.1O solid solution by a hydrogen-methane mixture. In the case of TlCl, the structure of the crystals observed inside the tubes were all found to be derived from the rocksalt form and bilayer crystals were observed which exhibited reduced coordination relative to the fcc structure, as determined from high resolution transmission electron microscopy (HRTEM). In contrast, the crystal structure of bulk TlCl is a CsCl type structure. These results are consistent with the recently reported reduced coordination KI crystals formed within SWNTs [3]. In the case of PbI2 (i.e. with the CdCl2 structure), the use of HRTEM images combined with image simulations was used to confirm the partially reduced coordination of Pb atoms within the SWNT and DWNT confined 1D crystals.

scholarly journals Carbon Nanotube-Graphene hybrid: Recent Synthesis Methodologies and Applications

2017 ◽  
Vol 4 (1) ◽  
pp. 72-91
Author(s):  
Geoffrey Ijeomah ◽  
Fahmi Samsuri ◽  
Mohamad Adzhar Md Zawawi ◽  
Felix Obite
Keyword(s):  
Carbon Nanotubes ◽  
Optical Properties ◽  
Two Dimensional ◽  
Scientific Interest ◽  
One Dimensional ◽  
3 Dimensional ◽  
Device Applications ◽  
Fundamental Research ◽  
Recent Synthesis ◽  
Made In

The melding of one-dimensional (1D) carbon nanotubes (CNTs) and two-dimensional (2D) graphene to generate a CNT-graphene hybrid with 3-dimensional (3D) features has generated a lot of scientific interest owing to the synergistic consequences of the resulting interface hybrid on the electrical, mechanical, electrochemical and optical properties, which presents plethora of opportunities in both fundamental research and device applications. The review presents an overview of the recent perspectives made in the field of CNT-graphene hybrid architectures. The possible applications particularly in device sensing, as well as challenges are also presented.

Recent Advances in Methods of Forming Carbon Nanotubes

MRS Bulletin ◽  
2004 ◽  
Vol 29 (4) ◽  
pp. 244-250 ◽  
Author(s):  
Jie Liu ◽  
Shoushan Fan ◽  
Hongjie Dai
Keyword(s):  
Carbon Nanotubes ◽  
Recent Progress ◽  
Application Development ◽  
High Quality ◽  
Recent Advances ◽  
Materials Research ◽  
Fundamental Research ◽  
Synthesis Of Carbon Nanotubes

AbstractSince their discovery, carbon nanotubes, both single-walled and multiwalled, have been a focus in materials research. Fundamental research and application development hinge on high-quality nanotube materials and controlled routes to their organization and assembly. The aim of this article is to provide updated information on recent progress in the synthesis of carbon nanotubes.

Fundamental Research into Thin Films in a Developing Country

1972 ◽  
Vol 30 ◽  
pp. 500-501
Author(s):  
J.A. Eades ◽  
E. Grünbaum
Keyword(s):  
Thin Films ◽  
Growth Process ◽  
Empirical Process ◽  
Nucleation And Growth ◽  
Research Groups ◽  
Film Research ◽  
Fundamental Research ◽  
Controlled Deposition ◽  
The One ◽  
The University

In the last decade and a half, thin film research, particularly research into problems associated with epitaxy, has developed from a simple empirical process of determining the conditions for epitaxy into a complex analytical and experimental study of the nucleation and growth process on the one hand and a technology of very great importance on the other. During this period the thin films group of the University of Chile has studied the epitaxy of metals on metal and insulating substrates. The development of the group, one of the first research groups in physics to be established in the country, has parallelled the increasing complexity of the field.The elaborate techniques and equipment now needed for research into thin films may be illustrated by considering the plant and facilities of this group as characteristic of a good system for the controlled deposition and study of thin films.

Structural phenomena in the growth of carbon nanotubes

1993 ◽  
Vol 51 ◽  
pp. 750-751
Author(s):  
Jun Jiao
Keyword(s):  
Carbon Nanotubes ◽  
Growth Mechanism ◽  
Carbonaceous Material ◽  
Cluster Growth ◽  
Structural Elements ◽  
Rich Variety ◽  
Different Shapes ◽  
Point To Point

HREM studies of the carbonaceous material deposited on the cathode of a Huffman-Krätschmer arc reactor have shown a rich variety of multiple-walled nano-clusters of different shapes and forms. The preparation of the samples, as well as the variety of cluster shapes, including triangular, rhombohedral and pentagonal projections, are described elsewhere.The close registry imposed on the nanotubes, focuses attention on the cluster growth mechanism. The strict parallelism in the graphitic separation of the tube walls is maintained through changes of form and size, often leading to 180° turns, and accommodating neighboring clusters and defects. Iijima et. al. have proposed a growth scheme in terms of pentagonal and heptagonal defects and their combinations in a hexagonal graphitic matrix, the first bending the surface inward, and the second outward. We report here HREM observations that support Iijima’s suggestions, and add some new features that refine the interpretation of the growth mechanism. The structural elements of our observations are briefly summarized in the following four micrographs, taken in a Hitachi H-8100 TEM operating at an accelerating voltage of 200 kV and with a point-to-point resolution of 0.20 nm.

Suicide on the Indian Subcontinent

Crisis ◽  
2002 ◽  
Vol 23 (3) ◽  
pp. 104-107 ◽  
Author(s):  
Murad M. Khan
Keyword(s):  
Sri Lanka ◽  
Mental Health Professionals ◽  
Indian Subcontinent ◽  
Interpersonal Relationship ◽  
Public Health Problem ◽  
Elderly Subjects ◽  
Important Public Health Problem ◽  
Policy Makers ◽  
Formidable Challenge ◽  
Causative Factors

Summary: The Indian subcontinent comprises eight countries (India, Pakistan, Bangladesh, Nepal, Sri Lanka, Afghanistan, Bhutan, and the Maldives) and a collective population of more than 1.3 billion people. 10% of the world's suicides (more than 100,000 people) take place in just three of these countries, viz. India, Sri Lanka, and Pakistan. There is very little information on suicides from the other four countries. Some differences from suicides in Western countries include the high use of organophosphate insecticides, larger numbers of married women, fewer elderly subjects, and interpersonal relationship problems and life events as important causative factors. There is need for more and better information regarding suicide in the countries of the Indian subcontinent. In particular, studies must address culture-specific risk factors associated with suicide in these countries. The prevention of this important public health problem in an area of the world with myriad socio-economic problems, meager resources, and stigmatization of mental illness poses a formidable challenge to mental health professionals, policy makers, and governments of these countries.

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