scholarly journals Conductivity-Dependent Strain Response of Carbon Nanotube Treated Bacterial Nanocellulose

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
S. Farjana ◽  
F. Toomadj ◽  
P. Lundgren ◽  
A. Sanz-Velasco ◽  
O. Naboka ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Bacterial Cellulose ◽  
Tensile Force ◽  
Gauge Factor ◽  
Multiwalled Carbon ◽  
Electrically Conductive ◽  
Dispersion Process ◽  
Dependent Strain ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

This paper reports the strain sensitivity of flexible, electrically conductive, and nanostructured cellulose which was prepared by modification of bacterial cellulose with double-walled carbon nanotubes (DWCNTs) and multiwalled carbon nanotubes (MWCNTs). The electrical conductivity depends on the modifying agent and its dispersion process. The conductivity of the samples obtained from bacterial cellulose (BNC) pellicles modified with DWCNT was in the range from 0.034 S·cm−1to 0.39 S·cm−1, and for BNC pellicles modified with MWCNTs it was from 0.12 S·cm−1to 1.6 S·cm−1. The strain-induced electromechanical response, resistance versus strain, was monitored during the application of tensile force in order to study the sensitivity of the modified nanocellulose. A maximum gauge factor of 252 was found from the highest conductive sample treated by MWCNT. It has been observed that the sensitivity of the sample depends on the conductivity of the modified cellulose.

Mechanically Tough, Electrically Conductive Polyethylene Oxide Nanofiber Web Incorporating DNA-Wrapped Double-Walled Carbon Nanotubes

2013 ◽  
Vol 5 (10) ◽  
pp. 4150-4154 ◽  
Author(s):  
Jin Hee Kim ◽  
Masakazu Kataoka ◽  
Yong Chae Jung ◽  
Yong-Il Ko ◽  
Kazunori Fujisawa ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Polyethylene Oxide ◽  
Electrically Conductive ◽  
Nanofiber Web ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

New phenomena in the nanospace of single-wall carbon nanotubes

2017 ◽  
Author(s):  
Z.J. Shi ◽  
Z.N. Gu
Keyword(s):  
Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
Chemical Substances ◽  
Fullerene Derivatives ◽  
Single Wall Carbon ◽  
Endohedral Metallofullerenes ◽  
New Phenomena ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

This article describes the new phenomena of chemical substances encapsulated in the hollow spaces of carbon nanotubes, with particular emphasis on the nanospace of single-wall carbon nanotubes (SWNTs) that have nanospaces of about 1 nm in diameter. It begins with a brief introduction to the filling methods and the filling of multiwalled carbon nanotubes, followed by a discussion of the structures, phase transitions and chemical reactions of some typical fullerenes, endohedral metallofullerenes, fullerene derivatives, and inorganic and organic compounds, in the nanospace of SWNTs. The electron transfer between dopants and SWNTs is also examined. The article also considers the filling of double-walled carbon nanotubes.

Stretchable electrically conductive and high gas barrier nanocomposites

2018 ◽  
Vol 6 (8) ◽  
pp. 2095-2104 ◽  
Author(s):  
Chungyeon Cho ◽  
Yixuan Song ◽  
Ryan Allen ◽  
Kevin L. Wallace ◽  
Jaime C. Grunlan
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Oxide ◽  
Polyethylene Oxide ◽  
Polyacrylic Acid ◽  
Layer By Layer ◽  
Electrically Conductive ◽  
Gas Barrier ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Layer Assembly

By alternately depositing trilayers of polyethylene oxide, double-walled carbon nanotubes stabilized in polyacrylic acid, and graphene oxide via layer-by-layer assembly, elastomeric conductive multilayers with a high gas barrier were prepared.

scholarly journals Some Observations on Carbon Nanotubes Susceptibility to Cell Phagocytosis

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Aneta Fraczek-Szczypta ◽  
Elzbieta Menaszek ◽  
Stanislaw Blazewicz
Keyword(s):  
Carbon Nanotubes ◽  
Culture Media ◽  
Tween 20 ◽  
Multiwalled Carbon ◽  
Dispersion Process ◽  
Chemical Functionalization ◽  
Carbon Nanohorns ◽  
Single Walled Carbon ◽  
Before And After ◽  
Walled Carbon Nanotubes

The aim of this study was to assess the influence of different types of carbon nanotubes (CNTs) on cell phagocytosis. Three kinds of carbon nanotubes: single-walled carbon nanohorns (SWCNHs), multiwalled carbon nanotubes (MWCNTs), and ultra-long single-walled carbon nanotubes (ULSWCNTs) before and after additional chemical functionalization were seeded with macrophage cell culture. Prior to biological testing, the CNTs were subjected to dispersion process with the use of phosphate buffered solution (PBS) and PBS containing surfactant (Tween 20) or dimethyl sulfoxide (DMSO). The results indicate that the cells interaction with an individual nanotube is entirely different as compared to CNTs in the form of aggregate. The presence of the surfactant favors the CNTs dispersion in culture media and facilitates phagocytosis process, while it has disadvantageous influence on cells morphology. The cells phagocytosis is a more effective for MWCNTs and SWCNHs after their chemical functionalization. Moreover, these nanotubes were well dispersed in culture media without using DMSO or surfactant. The functionalized carbon nanotubes were easily dispersed in pure PBS and seeded with cells.

scholarly journals Carbon nanotube ecotoxicity in amphibians: assessment of multiwalled carbon nanotubes and comparison with double-walled carbon nanotubes

Nanomedicine ◽  
2010 ◽  
Vol 5 (6) ◽  
pp. 963-974 ◽  
Author(s):  
Florence Mouchet ◽  
Perine Landois ◽  
Pascal Puech ◽  
Eric Pinelli ◽  
Emmanuel Flahaut ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

scholarly journals Synthesis of silver nanoparticles embedded with single-walled carbon nanotubes for printable elastic electrodes and sensors with high stability

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jae-Won Lee ◽  
Joon Young Cho ◽  
Mi Jeong Kim ◽  
Jung Hoon Kim ◽  
Jong Hwan Park ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Silver Nanoparticles ◽  
High Performance ◽  
Composite Films ◽  
Single Walled Carbon Nanotubes ◽  
Gauge Factor ◽  
Time Interval ◽  
Single Walled Carbon ◽  
Irradiation Energy ◽  
Walled Carbon Nanotubes

AbstractSoft electronic devices that are bendable and stretchable require stretchable electric or electronic components. Nanostructured conducting materials or soft conducting polymers are one of the most promising fillers to achieve high performance and durability. Here, we report silver nanoparticles (AgNPs) embedded with single-walled carbon nanotubes (SWCNTs) synthesized in aqueous solutions at room temperature, using NaBH4 as a reducing agent in the presence of highly oxidized SWCNTs as efficient nucleation agents. Elastic composite films composed of the AgNPs-embedded SWCNTs, Ag flake, and polydimethylsiloxane are irradiated with radiation from a Xenon flash lamp within a time interval of one second for efficient sintering of conductive fillers. Under high irradiation energy, the stretchable electrodes are created with a maximum conductivity of 4,907 S cm−1 and a highly stretchable stability of over 10,000 cycles under a 20% strain. Moreover, under a low irradiation energy, strain sensors with a gauge factor of 76 under a 20% strain and 5.4 under a 5% strain are fabricated. For practical demonstration, the fabricated stretchable electrode and strain sensor are attached to a human finger for detecting the motions of the finger.

scholarly journals Electrically Conductive Networks from Hybrids of Carbon Nanotubes and Graphene Created by Laser Radiation

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1875
Author(s):  
Alexander Yu. Gerasimenko ◽  
Artem V. Kuksin ◽  
Yury P. Shaman ◽  
Evgeny P. Kitsyuk ◽  
Yulia O. Fedorova ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Laser Irradiation ◽  
Flexible Electronics ◽  
Threshold Energy ◽  
Wavelength Region ◽  
Hybrid Nanostructures ◽  
Graphene Sheets ◽  
Electrically Conductive ◽  
Walled Carbon Nanotubes

A technology for the formation of electrically conductive nanostructures from single-walled carbon nanotubes (SWCNT), multi-walled carbon nanotubes (MWCNT), and their hybrids with reduced graphene oxide (rGO) on Si substrate has been developed. Under the action of single pulses of laser irradiation, nanowelding of SWCNT and MWCNT nanotubes with graphene sheets was obtained. Dependences of electromagnetic wave absorption by films of short and long nanotubes with subnanometer and nanometer diameters on wavelength are calculated. It was determined from dependences that absorption maxima of various types of nanotubes are in the wavelength region of about 266 nm. It was found that contact between nanotube and graphene was formed in time up to 400 fs. Formation of networks of SWCNT/MWCNT and their hybrids with rGO at threshold energy densities of 0.3/0.5 J/cm2 is shown. With an increase in energy density above the threshold value, formation of amorphous carbon nanoinclusions on the surface of nanotubes was demonstrated. For all films, except the MWCNT film, an increase in defectiveness after laser irradiation was obtained, which is associated with appearance of C–C bonds with neighboring nanotubes or graphene sheets. CNTs played the role of bridges connecting graphene sheets. Laser-synthesized hybrid nanostructures demonstrated the highest hardness compared to pure nanotubes. Maximum hardness (52.7 GPa) was obtained for MWCNT/rGO topology. Regularity of an increase in electrical conductivity of nanostructures after laser irradiation has been established for films made of all nanomaterials. Hybrid structures of nanotubes and graphene sheets have the highest electrical conductivity compared to networks of pure nanotubes. Maximum electrical conductivity was obtained for MWCNT/rGO hybrid structure (~22.6 kS/m). Networks of nanotubes and CNT/rGO hybrids can be used to form strong electrically conductive interconnections in nanoelectronics, as well as to create components for flexible electronics and bioelectronics, including intelligent wearable devices (IWDs).

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