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

Тамбасов, И. А.; Voronin, A. I.; Evsevskaya, N. P.; Волочаев, М. Н.; Fadeev, Yuri V.; Симунин, М. М.; Aleksandrovsky, A.S.; Smolyarova, T. E.; Abelian, Seryozha R.; Tambasova, Ekaterina V.; Gornakov, Maxim O.; Eremina, Valentina A.; Kuznetsov, Yu. M.; Дорохин, М. В.; Obraztsova, E. D.

doi:10.1016/j.physe.2019.113619

Cited by 17 publications

(12 citation statements)

References 52 publications

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“…At present, one of the pressing challenges of this field is to devise straightforward protocols of large-scale separation of SWCNTs by electrical character to open several potential applications for power engineering. So far, several ways of separation by the electrical nature [ 29 , 30 , 31 ] were developed to obtain metallic or semiconducting base materials for conducting wires [ 32 ] or thermogenerators [ 33 ], respectively.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

et al. 2020

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Single-walled carbon nanotubes (SWCNTs) remain one of the most promising materials of our times. One of the goals is to implement semiconducting and metallic SWCNTs in photonics and microelectronics, respectively. In this work, we demonstrated how such materials could be obtained from the parent material by using the aqueous two-phase extraction method (ATPE) at a large scale. We also developed a dedicated process on how to harvest the SWCNTs from the polymer matrices used to form the biphasic system. The technique is beneficial as it isolates SWCNTs with high purity while simultaneously maintaining their surface intact. To validate the utility of the metallic and semiconducting SWCNTs obtained this way, we transformed them into thin free-standing films and characterized their thermoelectric properties.

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Section: Introductionmentioning

confidence: 99%

Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

et al. 2020

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“…Stepwise physical separation of these phases and subsequent combination with fresh complementary top/bottom solutions of particular composition enables fractionation of the material. At present, such routine gives rise to the isolation of SWCNTs of particular electronic character 26,27 , chirality 23,[28][29][30] and even handedness 28 both in the small- 21,24,29 and since recently also in the large-diameter regime 28 .…”

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confidence: 99%

One-step sorting of single-walled carbon nanotubes using aqueous two-phase extraction in the presence of basic salts

Podlesny

Shiraki

Janas

2020

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We demonstrate a simple one-step approach to separate (6,5) CNTs from raw material by using the aqueous two-phase extraction method. to reach this goal, stable and inexpensive K 2 co 3 , na 2 co 3 , Li 2 co 3, and K 3 po 4 basic salts are used as modulators of the differentiation process. Under the appropriate parameters, near monochiral fractions become available for straightforward harvesting. In parallel, we show that the isolation process is strongly affected not only by pH but by the inherent nature of the introduced chemical species as well. the results of our study also reveal that the commonly used ingredients of the biphasic system make a strong contribution to the course of the separation by having far from neutral pH values themselves.

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“…The highest ZT (0.0558) was obtained at the highest ZnO dopant concentration owing to the low thermal conductivity. These results indicate relatively high thermoelectric performance in the recently reported TCO-based n-type thermoelectric material [ 7 , 9 , 32 , 33 ]. The κ l value was obtained by κ tot and κ e , calculated using κ e = L 0 T / ρ , where L 0 , T , and ρ are the Lorentz coefficient, absolute temperature, and resistivity, respectively.…”

Section: Resultsmentioning

confidence: 54%

“…Thermoelectricity is a promising renewable energy source that can replace fossil fuels because it can produce energy through waste heat, unlike other renewable energy sources. To employ thermoelectric (TE) materials in various devices and fields, extensive studies have been carried out to improve the energy conversion efficiency of thin-film thermoelectric materials [ 6 , 7 , 8 , 9 , 10 , 11 ]. Particularly, as a transparent TE material, tin-doped indium oxide (In 2 O 3 :SnO 2 , ITO) thin film is promising owing to its high electrical conductivity, chemical stability, low toxicity, and low price compared to TE alloys [ 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Controlled Lattice Thermal Conductivity of Transparent Conductive Oxide Thin Film via Localized Vibration of Doping Atoms

et al. 2021

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Amorphization using impurity doping is a promising approach to improve the thermoelectric properties of tin-doped indium oxide (ITO) thin films. However, an abnormal phenomenon has been observed where an excessive concentration of doped atoms increases the lattice thermal conductivity (κl). To elucidate this paradox, we propose two hypotheses: (1) metal hydroxide formation due to the low bond enthalpy energy of O and metal atoms and (2) localized vibration due to excessive impurity doping. To verify these hypotheses, we doped ZnO and CeO2, which have low and high bond enthalpies with oxygen, respectively, into the ITO thin film. Regardless of the bond enthalpy energy, the κl values of the two thin films increased due to excessive doping. Fourier transform infrared spectroscopy was conducted to determine the metal hydroxide formation. There was no significant difference in wave absorbance originating from the OH stretching vibration. Therefore, the increase in κl due to the excessive doping was due to the formation of localized regions in the thin film. These results could be valuable for various applications using other transparent conductive oxides and guide the control of the properties of thin films.

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

Cited by 17 publications

References 52 publications

Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

One-step sorting of single-walled carbon nanotubes using aqueous two-phase extraction in the presence of basic salts

Controlled Lattice Thermal Conductivity of Transparent Conductive Oxide Thin Film via Localized Vibration of Doping Atoms

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