Effects of boron doping on mechanical properties and thermal conductivities of carbon nanotubes

Fakhrabadi, Mir Masoud Seyyed; Allahverdizadeh, A.; Norouzifard, Vahid; Dadashzadeh, Behnam

doi:10.1016/j.ssc.2012.08.003

Cited by 30 publications

(14 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is advantageous for TE applications, since the processing of TE materials usually employ high-temperature and low-pressure conditions . Thermal transport in SWCNT networks can also be suppressed via atomic doping. , A thermal conductivity, κ of 14 W/mK has been recently reported in B-SWCNT films produced by the same method used in this work. Using this κ value, a figure of merit, ZT = S 2 σT/κ , equal to 0.006 is obtained at the temperature, T , of 300 K.…”

Section: Results and Discussionmentioning

confidence: 77%

Boron-Doped Single-Walled Carbon Nanotubes with Enhanced Thermoelectric Power Factor for Flexible Thermoelectric Devices

Liu

Khavrus

Lehmann

et al. 2020

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

We report a detailed experimental and theoretical study on thermoelectric properties of boron-doped single-walled carbon nanotubes (B-SWCNTs), which are versatile building blocks of flexible thermoelectric devices. Implantations of substitutional boron dopants (0.1−0.5 atom %) in SWCNTs are realized using thermal diffusion. The after-synthesis boron doping simultaneously improves the Seebeck coefficient (S) and electrical conductivity (σ) of SWCNT networks, leading to an S 2 σ value of 226 μW/mK 2 . First-principle calculations indicate that a few tenths atom % of substitutional boron atoms improve the S value of semi-conducting SWCNTs but reduce the electron conductance in individual SWCNTs. The high σ of B-SWCNT networks is attributed to the improved electrical transport between laterally contacted metallic and semi-conducting nanotubes. The produced B-SWCNTs are stable over high-temperature annealing or processing in liquid media, which inspired us to fabricate thermoelectric modules by a low-cost printing method. The modules demonstrate an increased thermoelectric efficiency by 76% compared to those with undoped SWCNTs. This work provides a feasible fabrication strategy and physical insights for B-SWCNT-based flexible thermoelectrics.

show abstract

Section: Results and Discussionmentioning

confidence: 77%

Boron-Doped Single-Walled Carbon Nanotubes with Enhanced Thermoelectric Power Factor for Flexible Thermoelectric Devices

Liu

Khavrus

Lehmann

et al. 2020

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…The thermal conductivity of the pristine DWNTs (ca. 5.15 W/m K) increased after boron-doping (Figure d), even though the theoretical study suggested that boron-doping reduces the thermal conductivity of SWNTs . The improved thermal conductivity of B1400-DWNTs (8.69 W/m K) could be originated from the improvement in crystallinity of each and bundled DWNTs during high-temperature treatments.…”

Section: Results and Discussionmentioning

confidence: 94%

“…5.15 W/ m K) increased after boron-doping (Figure 6d), even though the theoretical study suggested that boron-doping reduces the thermal conductivity of SWNTs. 30 The improved thermal conductivity of B1400-DWNTs (8.69 W/m K) could be originated from the improvement in crystallinity of each and bundled DWNTs during high-temperature treatments. The enhanced thermal conductivity of B1500-DWNTs (8.84 W/ m K) suggested the formation of a network of nanotubes within the bundles through the coalescence process.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Outer Tube-Selectively Boron-Doped Double-Walled Carbon Nanotubes for Thermoelectric Applications

Muramatsu

Kang

Fujisawa

et al. 2020

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The doping processes of carbon nanotubes were improved over time, accompanied by molecular modelling calculations and simulations [61,[65][66][67][68]. Figure 7 shows the strcuture of Si-doped (n, n) n=3-5 carbon nanotubes along with full geometrical optimization obtained through first-principle simulations on silicon-doped armchair single-walled carbon nanotubes of various diameters [68].…”

Section: Introductionmentioning

confidence: 99%

Fundamentals and scopes of doped carbon nanotubes towards energy and biosensing applications

Muhulet

Miculescu

Voicu

et al. 2018

Materials Today Energy

178

View full text Add to dashboard Cite

Since their first allusion, carbon nanotubes have attracted significant research interest, especially with respect to composite manufacturing as a filler material for enhancing their mechanical and electrical properties. Several methods have been developed for modifying the electrical properties of carbon nanotubes such as CNTs wall's carbon atoms substitution with other appropriate atoms including engineering of their outer surfaces by covalent and noncovalent molecules, such as CNTs channel filling and nano-chemical reactions therein. CNTs with tailored electrical conduction open large perspectives for their applicabilities in advanced technologies. Taking into consideration the innovative advantages of pure and hybrid CNTs, in this article we have comprehensively reviewed the latest state-of-art research developments in the direction of different synthesis strategies, structure-property relationships, and advanced applications towards energy storage, supercapacitors, electrodes, catalytic supports, as well as biosensing.

show abstract

Effects of boron doping on mechanical properties and thermal conductivities of carbon nanotubes

Cited by 30 publications

References 15 publications

Boron-Doped Single-Walled Carbon Nanotubes with Enhanced Thermoelectric Power Factor for Flexible Thermoelectric Devices

Boron-Doped Single-Walled Carbon Nanotubes with Enhanced Thermoelectric Power Factor for Flexible Thermoelectric Devices

Outer Tube-Selectively Boron-Doped Double-Walled Carbon Nanotubes for Thermoelectric Applications

Fundamentals and scopes of doped carbon nanotubes towards energy and biosensing applications

Contact Info

Product

Resources

About