scholarly journals In-situ Transmission Electron Microscopy of Structural Changes and Luminescence of a Multiwall Carbon Nanotube by Applying an Electric Current

Materia Japan ◽  
2018 ◽  
Vol 57 (12) ◽  
pp. 616-616
Author(s):  
Koji Asaka ◽  
Koshi Nishikawa ◽  
Yahachi Saito
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Carbon Nanotube ◽  
Electric Current ◽  
Structural Changes ◽  
Multiwall Carbon Nanotube ◽  
Transmission Electron ◽  
Multiwall Carbon

scholarly journals Preparation of a Novel CO2-Responsive Polymer/Multiwall Carbon Nanotube Composite

Processes ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 1638
Author(s):  
Yonggang Ma ◽  
Xin Chen ◽  
Dehui Han ◽  
Zhe Zhao ◽  
Wenting Lu
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Carbon Nanotube ◽  
Multiwall Carbon Nanotube ◽  
Nanotube Bundles ◽  
Transmission Electron ◽  
Responsive Polymer ◽  
Carbon Nanotube Composite ◽  
Multiwall Carbon

A CO2-responsive composite of multiwall carbon nanotube (MWCNT) coated with polydopamine (PDA) and polydimethylamino-ethyl methacrylate (PDMAEMA) was prepared. The PDA was first self-polymerized on the surface of carbon nanotube. 2-bromoisobutyryl bromide (BiBB) was then immobilized by PDA and then initiated the ATRP of DMAEMA on the carbon nanotube surface. The resulting composite was characterized by Fourier-transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The CO2-responsive test was performed by bubbling CO2 into the mixture of MWCNT-PDA-PDMAEMA composite in water. A well-dispersed solution was obtained and the UV-Vis transmittance decreased dramatically. This is attributed to the reaction between PDMAEMA and CO2. The formation of ammonium bicarbonates on the surface of carbon nanotubes leads to the separation of nanotube bundles. This process can be reversed as the removal of CO2 by bubbling N2.

scholarly journals Enabling Lab-in-Gap Transmission Electron Microscopy at Atomic Resolution

2016 ◽  
Vol 24 (1) ◽  
pp. 24-29 ◽  
Author(s):  
Xiao Feng Zhang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Structural Changes ◽  
Pole Piece ◽  
Large Area ◽  
Electrical Fields ◽  
Transmission Electron ◽  
Environmental Tem ◽  
New Generation

Abstract: Hitachi Lab-in-Gap transmission electron microscopy (TEM) technologies are introduced. The term Lab-in-Gap refers to a special function that allows in situ and in operando TEM studies of materials in gas or liquid environments while stimulations, such as thermal or electrical fields, are applied to the specimen sitting in the pole piece gap in a TEM system. Physical or chemical process can be activated and imaged in real time using TEM or other imaging modes. The new generation environmental TEM platform with large pole piece gap and advanced aberration correctors opens wide possibilities for integrating multiple stimuli sources as well as large-area, sub-Å resolution live imaging for dynamic structural changes.

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