Optical properties of single-wall carbon nanotubes

Kataura, Hiromichi; Kumazawa, Y.; Maniwa, Yutaka; Umezu, Ikurou; Suzuki, Satoshi; Ohtsuka, Y.; Achiba, Yohji

doi:10.1016/s0379-6779(98)00278-1

Cited by 2,349 publications

(2,137 citation statements)

References 15 publications

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“…Furthermore, dodecyl (C 12 ) side chains were chosen to dissolve s-SWNTs with relatively large diameters of approximately 1.0 nm. In the UV-Vis-NIR spectroscopy, three peak groups were observed (Figure 1(b)), attributed to the first (S 11 , > 1400 nm), second (S 22 , 800–1200 nm), and third (S 33 , < 600 nm) interband transitions between the van Hove singularity points [23]. Importantly, compared to SDOC D 2 O reference dispersion, the interband absorption of m-SWNTs (M 11 , 600–800 nm) was found to effectively decrease to its background level after PF12 separation.…”

Section: Resultsmentioning

confidence: 99%

Thickness-dependent thermoelectric power factor of polymer-functionalized semiconducting carbon nanotube thin films

Nonoguchi

Takata

Goto

et al. 2018

Science and Technology of Advanced Materials

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The effects of polymer structures on the thermoelectric properties of polymer-wrapped semiconducting carbon nanotubes have yet to be clarified for elucidating intrinsic transport properties. We systematically investigate thickness dependence of thermoelectric transport in thin films containing networks of conjugated polymer-wrapped semiconducting carbon nanotubes. Well-controlled doping experiments suggest that the doping homogeneity and then in-plane electrical conductivity significantly depend on film thickness and polymer species. This understanding leads to achieving thermoelectric power factors as high as 412 μW m−1 K−2 in thin carbon nanotube films. This work presents a standard platform for investigating the thermoelectric properties of nanotubes.

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Section: Resultsmentioning

confidence: 99%

Thickness-dependent thermoelectric power factor of polymer-functionalized semiconducting carbon nanotube thin films

Nonoguchi

Takata

Goto

et al. 2018

Science and Technology of Advanced Materials

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“…As confirmed by TEM and AFM measurements (see supplementary material), our synthesis method leads to SWNTs having relatively large diameters (that often exceed 1.5nm) with a probable high occurrence of double walled carbon nanotubes. Semiconducting nanotubes will then have a band gap in the range 0.4-0.6eV [13] which is almost half of what is currently seen in CVD prepared SWNTs. Because of their relatively low band gap, these nanotubes like is seen in double walled carbon nanotubes [14] are quite sensitive to electrostatic doping, for both positive and negative gate voltages yielding to a large occurrence of ambipolar CNFETs [15].…”

Section: Cnfet Integration and Functionalizationmentioning

confidence: 93%

Self‐Assembly of Carbon‐Nanotube‐Based Single‐Electron Memories

Marty

Bonnot

Bonhomme

et al. 2005

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We demonstrate the wafer-scale integration of single electron memories based on carbon nanotube field effect transistors (CNFETs) using a process based entirely on self assembly. First, a "dry" self assembly step based on chemical vapor deposition (CVD) allows the growth and connection of CNFETs. Next, a "wet" self-assembly step is used to attach a single 30 nmdiameter gold bead in the nanotube vicinity via chemical functionalization. The bead is used as the memory storage node while the CNFET operated in the subthreshold regime acts as an electrometer exhibiting exponential gain. Below 60 K, the transfer characteristics of goldCNFETs show highly reproducible hysteretic steps. Evaluation of the capacitance confirms that these current steps originate from the controlled storage of single electrons with a retention time that exceeds 550 s at 4 K.

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“…2c), which dominates both optical absorption and emission spectra. [48,60] As it turns out, the excitonic effect in SWNTs inflicts significant chirality dependence to the electronic transitions of nanotubes, which imparts large deviations from the 1/d t dependence [61] shown in Figure 2e and f. While the near-arm-chair sem-SWNTs (θ close to 30°) conform to the 1/d t dependence, as the chiral angle gets smaller, a larger deviation from the 1/d t dependence is observed (see Fig. 2d-f).…”

Section: Carbon Nanotube Propertiesmentioning

confidence: 99%

Carbon Nanotubes for Electronic and Electrochemical Detection of Biomolecules

2007

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The unique electronic and optical properties of carbon nanotubes, in conjunction with their size and mechanically robust nature, make these nanomaterials crucial to the development of next-generation biosensing platforms. In this Review, we present recent innovations in carbon nanotube-assisted biosensing technologies, such as DNA-hybridization, protein-binding, antibody-antigen and aptamers. Following a brief introduction on the diameter-and chirality-derived electronic characteristics of single-walled carbon nanotubes, the discussion is focused on the two major schemes for electronic biodetection, namely biotransistor-and electrochemistry-based sensors. Key fabrication methodologies are contrasted in light of device operation and performance, along with strategies for amplifying the signal while minimizing nonspecific binding. This Review is concluded with a perspective on future optimization based on array integration as well as exercising a better control in nanotube structure and biomolecular integration.

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Optical properties of single-wall carbon nanotubes

Cited by 2,349 publications

References 15 publications

Thickness-dependent thermoelectric power factor of polymer-functionalized semiconducting carbon nanotube thin films

Thickness-dependent thermoelectric power factor of polymer-functionalized semiconducting carbon nanotube thin films

Self‐Assembly of Carbon‐Nanotube‐Based Single‐Electron Memories

Carbon Nanotubes for Electronic and Electrochemical Detection of Biomolecules

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