N
          -type carbon nanotube by alkaline-earth metal Sr doping

Kim, Byung Hoon; Park, Tae Hoi; Baek, Seung Jae; Lee, Dong Su; Park, Seung Joo; Kim, Jun Sung; Park, Yung Woo

doi:10.1063/1.2913170

Cited by 16 publications

(6 citation statements)

References 19 publications

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“…The HT3OP can act as an electron acceptor when interacting with imogolite, in which the high electron affinity of S=O of HT3OP causes a withdrawal of negative charge from imogolite resulting in the effective motion of positive charges on the imogolite surface. The introduction of HT3OP onto the imogolite surface amplifies the p-type conductivity of imogolite, which resembles the phenomenon of chemical doping of carbon nanotubes with alkaline metals [71–74]. On the other hand, the electrical conductance of HT3P/imogolite calculated from the forward bias region is 4.5 µS, which is lower than that before HT3P doping.…”

Section: Reviewmentioning

confidence: 99%

Surface functionalization of aluminosilicate nanotubes with organic molecules

Ma¹,

Yah²,

Otsuka³

et al. 2012

Beilstein J. Nanotechnol.

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SummaryThe surface functionalization of inorganic nanostructures is an effective approach for enriching the potential applications of existing nanomaterials. Inorganic nanotubes attract great research interest due to their one-dimensional structure and reactive surfaces. In this review paper, recent developments in surface functionalization of an aluminosilicate nanotube, “imogolite”, are introduced. The functionalization processes are based on the robust affinity between phosphate groups of organic molecules and the aluminol (AlOH) surface of imogolite nanotubes. An aqueous modification process employing a water soluble ammonium salt of alkyl phosphate led to chemisorption of molecules on imogolite at the nanotube level. Polymer-chain-grafted imogolite nanotubes were prepared through surface-initiated polymerization. In addition, the assembly of conjugated molecules, 2-(5’’-hexyl-2,2’:5’,2’’-terthiophen-5-yl)ethylphosphonic acid (HT3P) and 2-(5’’-hexyl-2,2’:5’,2’’-terthiophen-5-yl)ethylphosphonic acid 1,1-dioxide (HT3OP), on the imogolite nanotube surface was achieved by introducing a phosphonic acid group to the corresponding molecules. The optical and photophysical properties of these conjugated-molecule-decorated imogolite nanotubes were characterized. Moreover, poly(3-hexylthiophene) (P3HT) chains were further hybridized with HT3P modified imogolite to form a nanofiber hybrid.

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Section: Reviewmentioning

confidence: 99%

Surface functionalization of aluminosilicate nanotubes with organic molecules

Ma¹,

Yah²,

Otsuka³

et al. 2012

Beilstein J. Nanotechnol.

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“…The majority of the published experimental work refers to bulk SWCNT materials such as mats, fibers and films [15][16][17][18][19][20][21][22][23][24][25] while very few experiments have been carried out in individual SWCNTs [5,6,14]. Also, the thermopower of multi-wall carbon nanotubes has attracted a significant amount of interest [29][30][31][32][33][34].…”

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confidence: 99%

Phonon-drag thermopower of ballistic semiconducting single-wall carbon nanotubes and comparison with the semiclassical result

Tsaousidou¹

2011

EPL

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We theoretically investigate the phonon-drag thermopower, S g , of semiconducting single-wall carbon nanotubes in the ballistic transport regime. Detailed derivations and numerical calculations for S g as a function of temperature, tube radius and doping are presented. We find a striking similarity between the behavior of S g in the ballistic regime and the one reported earlier in the diffusive transport regime.

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“…On the other hand, obtaining n‐type semiconducting CNTs is not as easy as p‐type ones. So, various kinds of dopants such as alkali metal 3, 4, or amine‐rich‐polymers 5, 6 were used to change electrical property of CNTs into n‐type characteristics.…”

Section: Introductionmentioning

confidence: 99%

Effect of SOCl₂ doping on electronic properties of single‐walled carbon nanotube thin film transistors

Kim

Lee

Huh

et al. 2011

Physica Status Solidi (b)

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We report on SOCl 2 doping of separated single-walled carbon nanotubes (SWCNTs) having different properties (metallic, semiconducting, and mixed). SWCNTs were doped by dropping SOCl 2 on a percolated network which was prepared on a Si substrate and the doping effect was evaluated by measuring electrical characteristics. Pristine semiconducting SWCNTs showed p-type transfer characteristics. After SOCl 2 doping, the conductivity of semiconducting SWCNTs increased about two times and the on/off ratio decreased by a factor of 3. Mixed pristine samples showed slight p-type characteristics and turned to metallic characteristics after doping. The network of metallic SWCNTs did not show any significant change of conductivity before and after doping.

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N -type carbon nanotube by alkaline-earth metal Sr doping

Cited by 16 publications

References 19 publications

Surface functionalization of aluminosilicate nanotubes with organic molecules

Surface functionalization of aluminosilicate nanotubes with organic molecules

Phonon-drag thermopower of ballistic semiconducting single-wall carbon nanotubes and comparison with the semiclassical result

Effect of SOCl₂ doping on electronic properties of single‐walled carbon nanotube thin film transistors

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N -type carbon nanotube by alkaline-earth metal Sr doping

Cited by 16 publications

References 19 publications

Surface functionalization of aluminosilicate nanotubes with organic molecules

Surface functionalization of aluminosilicate nanotubes with organic molecules

Phonon-drag thermopower of ballistic semiconducting single-wall carbon nanotubes and comparison with the semiclassical result

Effect of SOCl2 doping on electronic properties of single‐walled carbon nanotube thin film transistors

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Effect of SOCl₂ doping on electronic properties of single‐walled carbon nanotube thin film transistors