Gas-sensitive properties of individual carbon nanotubes modified by ion and electron irradiation

Argon Ions ◽

P Type ◽

The time characteristics of resistance change of individual nitrogen-doped multi-walled carbon nanotubes (N-MWCNTs), initial and irradiated with electrons, protons and argon ions has been measured upon exposure to ammonia and nitrogen dioxide. It is found that the initial N-MWCNTs have n-type conductivity, N-MWCNTs irradiated with protons and argon ions have p-type conductivity, and those irradiated with electrons have n-type conductivity. The relative gas sensitivity of individual N-MWCNTs, initial and irradiated with ions and electrons, has been determined

Nanocomposites with p- and n-Type Conductivity Controlled by Type and Content of Nanotubes in Thermosets for Thermoelectric Applications

Nanomaterials ◽

10.3390/nano10061144 ◽

2020 ◽

Vol 10 (6) ◽

pp. 1144

Author(s):

Katharina Kröning ◽

Beate Krause ◽

Petra Pötschke ◽

Bodo Fiedler

Keyword(s):

Carbon Nanotubes ◽

Seebeck Coefficient ◽

Single Walled Carbon Nanotubes ◽

Mwcnt Content ◽

Nitrogen Doped ◽

Seebeck Coefficients ◽

Different Types ◽

P Type ◽

In this work, composites based on epoxy resin and various carbon nanotubes (CNTs) were studied regarding their thermoelectric properties. The epoxy composites were prepared by infiltration of preformed CNT buckypapers. The influence of different types of CNTs on the Seebeck coefficient was investigated, namely lab-made and commercially available multi walled carbon nanotubes (MWCNTs), lab-made nitrogen doped MWCNTs (N-MWCNT) and commercially available single walled carbon nanotubes (SWCNTs). It was found that only by varying the lab-made MWCNT content could both n- and p-type composites be produced with Seebeck coefficients between −9.5 and 3.1 µV/K. The incorporation of N-MWCNTs resulted in negative Seebeck coefficients of −11.4 to −17.4 µV/K. Thus, the Seebeck coefficient of pure SWCNT changed from 37.4 to −25.5 µV/K in the epoxy/1 wt. % SWCNT composite. A possible explanation for the shift in the Seebeck coefficient is the change of the CNTs Fermi level depending on the number of epoxy molecules on the CNT surface.

Highly sensitive ammonia gas sensor based on metal-organic frameworks-derived CoSe2@nitrogen-doped amorphous carbon decorated with multi-walled carbon nanotubes

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.158252 ◽

2021 ◽

Vol 860 ◽

pp. 158252

Author(s):

Qian Mi ◽

Dongzhi Zhang ◽

Xixi Zhang ◽

Dongyue Wang

Keyword(s):

Carbon Nanotubes ◽

Gas Sensor ◽

Amorphous Carbon ◽

Metal Organic Frameworks ◽

Ammonia Gas ◽

Nitrogen Doped ◽

Highly Sensitive ◽

Metal Organic ◽

Proton and electron irradiation effects on multi-walled carbon nanotubes

Materials Research Express ◽

10.1088/2053-1591/ab17b9 ◽

2019 ◽

Vol 6 (7) ◽

pp. 075046

Author(s):

Uğur Akbaba

Keyword(s):

Carbon Nanotubes ◽

Electron Irradiation ◽

Irradiation Effects ◽

Field emission property of vertically aligned nitrogen-doped multi-walled carbon nanotubes produced by chemical vapor deposition

Materials Today Proceedings ◽

10.1016/j.matpr.2018.04.039 ◽

2018 ◽

Vol 5 (7) ◽

pp. 14965-14969 ◽

Cited By ~ 1

Author(s):

Pongpanot Rindhatayathon ◽

Worawut Muangrat ◽

Mati Horprathum ◽

Suphakan Kijamnajsuk ◽

Wolfgang Pfeiler ◽

...

Keyword(s):

Carbon Nanotubes ◽

Chemical Vapor Deposition ◽

Field Emission ◽

Vapor Deposition ◽

Chemical Vapor ◽

Field Emission Property ◽

Nitrogen Doped ◽

Vertically Aligned ◽

Voltammetric study on pristine and nitrogen-doped multi-walled carbon nanotubes decorated with gold nanoparticles

Microchimica Acta ◽

10.1007/s00604-013-1118-0 ◽

2013 ◽

Vol 181 (3-4) ◽

pp. 329-337 ◽

Cited By ~ 3

Author(s):

Nikos G. Tsierkezos ◽

Paweł Szroeder ◽

Uwe Ritter

Keyword(s):

Carbon Nanotubes ◽

Gold Nanoparticles ◽

Nitrogen Doped ◽

Voltammetric Study ◽

Synthesis and Characterization of Nitrogen Doped Carbon Nanotubes

Materials Science Forum ◽

10.4028/www.scientific.net/msf.636-637.714 ◽

2010 ◽

Vol 636-637 ◽

pp. 714-721 ◽

Cited By ~ 2

Author(s):

K. Kordatos ◽

A. Ntziouni ◽

A. Theodoratou ◽

Maria Perraki ◽

M. Terrones ◽

...

Keyword(s):

Carbon Nanotubes ◽

Production Method ◽

X Ray Diffraction ◽

Nitrogen Doped ◽

Solid Mixture ◽

Metallic Catalyst ◽

Nitrogen Doped Carbon ◽

The present work describes the synthesis of nitrogen doped multi-walled carbon nanotubes (CNx CNT). The chosen production method was the catalytic pyrolysis of a solid mixture containing [Ni(DMG)2] and melamine (C3H6N6), under an Αr atmosphere. A series of various experiments were performed, using different proportions of the reaction mixture, in order to optimize the production conditions of nitrogen doped carbon nanotubes. Finally, the produced materials were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDX), Raman spectroscopy as well as thermogravimetric analysis (TGA). The obtained data from all the above analyses, showed the formation of nitrogen doped carbon nanotubes of various diameters as well as nanofibers surrounded by byproducts such as aggregations of amorphous carbon and metallic catalyst, depending on the proportion of the reaction mixture.