NIR Laser-Driven Reversible Volume Phase Transition of Single-Walled Carbon Nanotube/Poly(N-isopropylacrylamide) Composite Gels

2008 ◽  
Vol 20 (19) ◽  
pp. 3610-3614 ◽  
Author(s):  
Tsuyohiko Fujigaya ◽  
Tatsuro Morimoto ◽  
Yasuro Niidome ◽  
Naotoshi Nakashima
Keyword(s):  
Phase Transition ◽  
Carbon Nanotube ◽  
Volume Phase Transition ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Volume Phase ◽  
Composite Gels ◽  
Nir Laser

Fast phase transition of water molecules in a defective carbon nanotube under an electric field

2016 ◽  
Vol 30 (06) ◽  
pp. 1650019 ◽  
Author(s):  
Xianwen Meng ◽  
Jiping Huang
Keyword(s):  
Phase Transition ◽  
Carbon Nanotube ◽  
Electric Field ◽  
Water Molecules ◽  
Single Walled Carbon Nanotube ◽  
Water Permeation ◽  
Single Walled Carbon ◽  
Fast Phase ◽  
Dynamics Simulations ◽  
Insight Into

We utilize molecular dynamics simulations to study the effect of an electric field on the permeation of water molecules through a defective single-walled carbon nanotube (DSWCNT). Compared with a perfect single-walled carbon nanotube (PSWCNT), the behaviors of water molecules respond more quickly under the same electric field in a DSWCNT. Wet–dry phase transition of water molecules occurs when the electric field reaches 0.32 V/nm, which is much lower than the case of the PSWCNT. Besides, the critical electric field is affected by the number of defects. These results pave a way for designing fast wet–dry transition devices and provide a new insight into water permeation through a defective nanochannel.

scholarly journals Fabrication of Surfactant-Dispersed HiPco Single-Walled Carbon Nanotube-Based Alginate Hydrogel Composites as Cellular Products

2019 ◽  
Vol 20 (19) ◽  
pp. 4802 ◽  
Author(s):  
Fabian Alvarez-Primo ◽  
Shweta Anil Kumar ◽  
Felicia S. Manciu ◽  
Binata Joddar
Keyword(s):  
Carbon Nanotube ◽  
Sodium Dodecyl ◽  
Complex Viscosity ◽  
Alginate Hydrogel ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Composite Gels ◽  
Pluronic F108 ◽  
Hydrogel Composites ◽  
Alginate Gels

In this study, we designed, synthesized, and characterized ultrahigh purity single-walled carbon nanotube (SWCNT)-alginate hydrogel composites. Among the parameters of importance in the formation of an alginate-based hydrogel composite with single-walled carbon nanotubes, are their varying degrees of purity, their particulate agglomeration and their dose-dependent correlation to cell viability, all of which have an impact on the resultant composite’s efficiency and effectiveness towards cell-therapy. To promote their homogenous dispersion by preventing agglomeration of the SWCNT, three different surfactants-sodium dodecyl sulfate (SDS-anionic), cetyltrimethylammonium bromide (CTAB-cationic), and Pluronic F108 (nonionic)-were utilized. After mixing of the SWCNT-surfactant with alginate, the mixtures were cross-linked using divalent calcium ions and characterized using Raman spectroscopy. Rheometric analysis showed an increase in complex viscosity, loss, and storage moduli of the SWCNT composite gels in comparison with pure alginate gels. Scanning electron microscopy revealed the presence of a well-distributed porous structure, and all SWCNT-gel composites depicted enhanced electrical conductivity with respect to alginate gels. To characterize their biocompatibility, cardiomyocytes were cultured atop these SWCNT-gels. Results comprehensively implied that Pluronic F108 was most efficient in preventing agglomeration of the SWCNTs in the alginate matrix, leading to a stable scaffold formation without posing any toxicity to the cells.

scholarly journals A semi-grand canonical kinetic Monte Carlo study of single-walled carbon nanotube growth

AIP Advances ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 045306
Author(s):  
Georg Daniel Förster ◽  
Thomas D. Swinburne ◽  
Hua Jiang ◽  
Esko Kauppinen ◽  
Christophe Bichara
Keyword(s):  
Monte Carlo ◽  
Carbon Nanotube ◽  
Kinetic Monte Carlo ◽  
Monte Carlo Study ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth ◽  
Grand Canonical
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