scholarly journals Enhanced thermoelectric properties exhibited by unreduced freestanding graphene oxide/carbon nanotube membranes

2021 ◽  
Author(s):  
Md. Saidul Islam ◽  
Hitomi Ohmagari ◽  
Mohammad Atiqur Rahman ◽  
Masahiro Fukuda ◽  
Yuta Shudo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
Thermoelectric Power ◽  
Thermoelectric Properties ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Seebeck Coefficients ◽  
Nanotube Membranes ◽  
Carbon Nanotube Membranes

Herein we determine the Seebeck coefficients, electric conductivities, and thermoelectric power factors of a range of unreduced graphene oxide (GO)/single-wall carbon nanotube (CNT) membranes incorporating different GO/CNT ratios as well...

Wrinkling and Strain Softening in Single-Wall Carbon Nanotube Membranes

2010 ◽  
Vol 104 (12) ◽  
Author(s):  
E. K. Hobbie ◽  
D. O. Simien ◽  
J. A. Fagan ◽  
J. Y. Huh ◽  
J. Y. Chung ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Strain Softening ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Nanotube Membranes ◽  
Carbon Nanotube Membranes

Thermoelectric properties of low-cost transparent single wall carbon nanotube thin films obtained by vacuum filtration

2019 ◽  
Vol 114 ◽  
pp. 113619 ◽  
Author(s):  
Igor A. Tambasov ◽  
Anton S. Voronin ◽  
Natalia P. Evsevskaya ◽  
Mikhail N. Volochaev ◽  
Yuri V. Fadeev ◽  
...  
Keyword(s):  
Thin Films ◽  
Carbon Nanotube ◽  
Thermoelectric Properties ◽  
Low Cost ◽  
Single Wall Carbon Nanotube ◽  
Vacuum Filtration ◽  
Single Wall Carbon

scholarly journals Thermoelectric properties of single-wall carbon nanotube films: Effects of diameter and wet environment

2016 ◽  
Vol 9 (2) ◽  
pp. 025102 ◽  
Author(s):  
Daisuke Hayashi ◽  
Tomohiro Ueda ◽  
Yusuke Nakai ◽  
Haruka Kyakuno ◽  
Yasumitsu Miyata ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Thermoelectric Properties ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Nanotube Films

scholarly journals Electrical and thermoelectric properties of single-wall carbon nanotube doped Bi2Te3

2012 ◽  
Vol 101 (3) ◽  
pp. 031909 ◽  
Author(s):  
Y. Zhang ◽  
X. L. Wang ◽  
W. K. Yeoh ◽  
R. K. Zheng ◽  
C. Zhang
Keyword(s):  
Carbon Nanotube ◽  
Thermoelectric Properties ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon

scholarly journals Origin of n type properties in single wall carbon nanotube films with anionic surfactants investigated by experimental and theoretical analyses

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Susumu Yonezawa ◽  
Tomoyuki Chiba ◽  
Yuhei Seki ◽  
Masayuki Takashiri
Keyword(s):  
Carbon Nanotube ◽  
Fermi Level ◽  
Thermoelectric Properties ◽  
First Principles ◽  
Anionic Surfactants ◽  
Water Molecules ◽  
First Principles Calculations ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Sodium Atoms

AbstractWe investigated the origin of n-type thermoelectric properties in single-wall carbon nanotube (SWCNT) films with anionic surfactants via experimental analyses and first-principles calculations. Several types of anionic surfactants were employed to fabricate SWCNT films via drop-casting, followed by heat treatment at various temperatures. In particular, SWCNT films with sodium dodecylbenzene sulfonate (SDBS) surfactant heated to 350 °C exhibited a longer retention period, wherein the n-type Seebeck coefficient lasted for a maximum of 35 days. In x-ray photoelectron spectroscopy, SWCNT films with SDBS surfactant exhibited a larger amount of sodium than oxygen on the SWCNT surface. The electronic band structure and density of states of SWCNTs with oxygen atoms, oxygen molecules, water molecules, sulfur atoms, and sodium atoms were analyzed using first-principles calculations. The calculations showed that sodium atoms and oxygen molecules moved the Fermi level closer to the conduction and valence bands, respectively. The water molecules, oxygen, and sulfur atoms did not affect the Fermi level. Therefore, SWCNT films exhibited n-type thermoelectric properties when the interaction between the sodium atoms and the SWCNTs was larger than that between the oxygen molecules and the SWCNTs.

scholarly journals Origin of N-Type Thermoelectric Properties in Single-Wall Carbon Nanotube Films With Anionic Surfactants Investigated by Experimental Analyses and First-Principles Calculations

2020 ◽  
Author(s):  
Susumu Yonezawa ◽  
Tomoyuki Chiba ◽  
Yuhei Seki ◽  
Masayuki Takashiri
Keyword(s):  
Carbon Nanotube ◽  
Fermi Level ◽  
Thermoelectric Properties ◽  
First Principles ◽  
Anionic Surfactants ◽  
Water Molecules ◽  
First Principles Calculations ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Sodium Atoms

Abstract We investigated the origin of n-type thermoelectric properties in single-wall carbon nanotube (SWCNT) films with anionic surfactants via experimental analyses and first-principles calculations. Several types of anionic surfactants were employed to fabricate SWCNT films via drop-casting, followed by heat treatment at various temperatures. In particular, SWCNT films with sodium dodecylbenzene sulfonate (SDBS) surfactant heated to 350°C exhibited a longer retention period, wherein the n-type Seebeck coefficient lasted for a maximum of 35 days. In the color mapping of atomic distribution, SWCNT films with SDBS surfactant exhibited a larger amount of sodium than oxygen on the SWCNT surface. The electronic band structure and density of states of SWCNTs with oxygen atoms, oxygen molecules, water molecules, sulfur atoms, and sodium atoms were analyzed using first-principles calculations. The calculations showed that sodium atoms and oxygen molecules moved the Fermi level closer to the conduction and valence bands, respectively. The water molecules, oxygen, and sulfur atoms did not affect the Fermi level. Therefore, SWCNT films exhibited n-type thermoelectric properties when the interaction between the sodium atoms and the SWCNTs was larger than that between the oxygen molecules and the SWCNTs.

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