Templated carbon nanotubes and the use of their cavities for nanomaterial synthesis

2017 ◽  
Author(s):  
T. Kyotani ◽  
H. Orikasa
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Properties ◽  
Magnetic Interaction ◽  
One Dimensional ◽  
Reaction Field ◽  
Water Dispersible ◽  
Nanomaterial Synthesis ◽  
Water Dispersibility ◽  
Synthesis Of Nanomaterials ◽  
Templated Carbon

This article focuses on templated carbon nanotubes (CNTs) and how their cavities can be used for the synthesis of nanomaterials. In particular, it demonstrates how effectively the CNTs can be functionalized by the template carbonization technique. The article first describes the method for synthesizing CNTs and carbon nano-test-tubes (CNTTs). It then considers the controlled filling of magnetic materials into CNTTs, taking into account the electrochemical deposition of Ni-Fe alloy and the magnetic properties of NiFe-filled CNTTs. It also examines the synthesis of water-dispersible and magnetically responsive CNTTs, with emphasis on water dispersibility and the effect of magnetic interaction. Finally, it shows how the cavities of templated CNTs can be utilized as a reaction field for the hydrothermal synthesis of one-dimensional nanomaterials.

scholarly journals Magnetocaloric Ln(HCO2)(C2O4) frameworks: Synthesis, Structure and Magnetic Properties

2021 ◽  
Author(s):  
Mario Falsaperna ◽  
Gavin B G Stenning ◽  
Ivan da Silva ◽  
Paul James Saines
Keyword(s):  
Magnetic Properties ◽  
Orthorhombic Structure ◽  
One Dimensional ◽  
Coordination Frameworks

This study probes the structure and the magnetic properties of members of the Ln(HCO2)(C2O4) (Ln = Sm3+-Er3+) family of coordination frameworks. These frameworks adopt a Pnma orthorhombic structure with one-dimensional...

Synergistic effect of carbon nanotubes and graphitic carbon nitride on the enhanced supercapacitor performance of cobalt diselenide-based composites

2021 ◽  
Author(s):  
Mingjie Li ◽  
Xuan Zheng ◽  
Xiang Li ◽  
Youjun Yu ◽  
Jinlong Jiang
Keyword(s):  
Carbon Nanotubes ◽  
Transition Metal ◽  
Synergistic Effect ◽  
Hydrothermal Method ◽  
High Performance ◽  
Carbon Nitride ◽  
Electrode Materials ◽  
One Dimensional ◽  
Supercapacitor Performance ◽  
Metal Selenides

Recently, transition metal selenides have been investigated extensively as promising electrode materials for high-performance supercapacitors. Herein, the multi-component CoSe2/CNTs@g-C3N4 composites are prepared using a two-step hydrothermal method by incorporating one-dimensional...

scholarly journals Gate-tunable plasmons in mixed-dimensional van der Waals heterostructures

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Sheng Wang ◽  
SeokJae Yoo ◽  
Sihan Zhao ◽  
Wenyu Zhao ◽  
Salman Kahn ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carrier Density ◽  
Electromagnetic Interaction ◽  
Luttinger Liquid ◽  
Fundamental Physics ◽  
Metallic Structures ◽  
One Dimensional ◽  
Figures Of Merit ◽  
Electrostatic Gating ◽  
Plasmon Dispersion

AbstractSurface plasmons, collective electromagnetic excitations coupled to conduction electron oscillations, enable the manipulation of light–matter interactions at the nanoscale. Plasmon dispersion of metallic structures depends sensitively on their dimensionality and has been intensively studied for fundamental physics as well as applied technologies. Here, we report possible evidence for gate-tunable hybrid plasmons from the dimensionally mixed coupling between one-dimensional (1D) carbon nanotubes and two-dimensional (2D) graphene. In contrast to the carrier density-independent 1D Luttinger liquid plasmons in bare metallic carbon nanotubes, plasmon wavelengths in the 1D-2D heterostructure are modulated by 75% via electrostatic gating while retaining the high figures of merit of 1D plasmons. We propose a theoretical model to describe the electromagnetic interaction between plasmons in nanotubes and graphene, suggesting plasmon hybridization as a possible origin for the observed large plasmon modulation. The mixed-dimensional plasmonic heterostructures may enable diverse designs of tunable plasmonic nanodevices.

scholarly journals Highly Water Dispersible Functionalized Graphene by Thermal Thiol-Ene Click Chemistry

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2830
Author(s):  
Farzaneh Farivar ◽  
Pei Lay Yap ◽  
Tran Thanh Tung ◽  
Dusan Losic
Keyword(s):  
Click Reaction ◽  
High Water ◽  
Pristine Graphene ◽  
Functionalized Graphene ◽  
Specific Chemical ◽  
Simple Modification ◽  
Water Dispersible ◽  
Chemical Hazards ◽  
Water Dispersibility ◽  
C And N

Functionalization of pristine graphene to achieve high water dispersibility remains as a key obstacle owing to the high hydrophobicity and absence of reactive functional groups on the graphene surface. Herein, a green and simple modification approach to prepare highly dispersible functionalized graphene via thermal thiol-ene click reaction was successfully demonstrated on pristine graphene. Specific chemical functionalities (–COO, –NH2 and –S) on the thiol precursor (L-cysteine ethyl ester) were clicked directly on the sp2 carbon of graphene framework with grafting density of 1 unit L-cysteine per 113 carbon atoms on graphene. This functionalized graphene was confirmed with high atomic content of S (4.79 at % S) as well as the presence of C–S–C and N–H species on the L-cysteine functionalized graphene (FG-CYS). Raman spectroscopy evidently corroborated the modification of graphene to FG-CYS with an increased intensity ratio of D and G band, ID/IG ratio (0.3 to 0.7), full-width at half-maximum of G band, FWHM [G] (20.3 to 35.5) and FWHM [2D] (64.8 to 90.1). The use of ethanol as the reaction solvent instead of common organic solvents minimizes the chemical hazards exposure to humans and the environment. This direct attachment of multifunctional groups on the surface of pristine graphene is highly demanded for graphene ink formulations, coatings, adsorbents, sensors and supercapacitor applications.

In situ synthesis of iron-filled nitrogen-doped carbon nanotubes and their magnetic properties

Carbon ◽  
2013 ◽  
Vol 61 ◽  
pp. 647-649 ◽  
Author(s):  
Qingze Jiao ◽  
Liang Hao ◽  
Qingyan Shao ◽  
Yun Zhao
Keyword(s):  
Carbon Nanotubes ◽  
Magnetic Properties ◽  
In Situ Synthesis ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon
Sign in / Sign up

Export Citation Format

Share Document