Charge Manipulation in Molecules Encapsulated Inside Single-Wall Carbon Nanotubes

Yanagi, Kazuhiro; Moriya, Rieko; Cuong, Nguyen Thanh; Otani, Minoru; Okada, Susumu

doi:10.1103/physrevlett.110.086801

Cited by 18 publications

(13 citation statements)

References 18 publications

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“…2a, b , respectively. We tuned E F using electrolyte gating techniques 16 , 17 , 25 , 26 . A schematic illustration of the experimental setup is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Intersubband plasmons in the quantum limit in gated and aligned carbon nanotubes

et al. 2018

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Confined electrons collectively oscillate in response to light, resulting in a plasmon resonance whose frequency is determined by the electron density and the size and shape of the confinement structure. Plasmons in metallic particles typically occur in the classical regime where the characteristic quantum level spacing is negligibly small compared to the plasma frequency. In doped semiconductor quantum wells, quantum plasmon excitations can be observed, where the quantization energy exceeds the plasma frequency. Such intersubband plasmons occur in the mid- and far-infrared ranges and exhibit a variety of dynamic many-body effects. Here, we report the observation of intersubband plasmons in carbon nanotubes, where both the quantization and plasma frequencies are larger than those of typical quantum wells by three orders of magnitude. As a result, we observed a pronounced absorption peak in the near-infrared. Specifically, we observed the near-infrared plasmon peak in gated films of aligned single-wall carbon nanotubes only for probe light polarized perpendicular to the nanotube axis and only when carriers are present either in the conduction or valence band. Both the intensity and frequency of the peak were found to increase with the carrier density, consistent with the plasmonic nature of the resonance. Our observation of gate-controlled quantum plasmons in aligned carbon nanotubes will not only pave the way for the development of carbon-based near-infrared optoelectronic devices but also allow us to study the collective dynamic response of interacting electrons in one dimension.

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“…2a, b , respectively. We tuned E F using electrolyte gating techniques 16 , 17 , 25 , 26 . A schematic illustration of the experimental setup is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Intersubband plasmons in the quantum limit in gated and aligned carbon nanotubes

et al. 2018

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“…The ability of carbon nanotubes to encapsulate different entities has been used as a laboratory for obtaining a great variety of nanowires and molecular arrangements, that became possible only because of the strong 1D confinement that carbon nanotube can provide [10,11]. Thus, the inner space of carbon nanotubes has been recognized as an ideal location to encapsulate and stabilize one-dimensional solids, such as linear carbon chains [12], polyyne C 12 H 2 [13] and C 10 H 2 [14], nanoribbons of WS 2 [15], nanowires [16], molecules [17], among others.…”

Section: Introductionmentioning

confidence: 99%

Linear carbon chains encapsulated in multiwall carbon nanotubes: Resonance Raman spectroscopy and transmission electron microscopy studies

Andrade

Vasconcelos

Gouvêa

et al. 2015

Carbon

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“…The carrier doping is, therefore, also an interesting challenge to realize a novel metallic conjugated polymers inside nanotubes. For the carrier control, this work evaluated the electrochemical doping of the inner materials, as reported in a previous paper 34 . The doping level was monitored by Raman and optical absorption spectra.…”

Section: Introductionmentioning

confidence: 99%

Extended-conjugation π-electron systems in carbon nanotubes

Miyaura

Miyata

Thendie

et al. 2018

Sci Rep

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Extending π-electron systems are among the most important topics in physics, chemistry and materials science because they can result in functional materials with applications in electronics and optics. Conventional processes for π-electron extension, however, can generate products exhibiting chemical instability, poor solubility or disordered structures. Herein, we report a novel strategy for the synthesis of π-conjugated polymers within the interiors of carbon nanotubes (CNTs). In this process, thiophene-based oligomers are encapsulated within CNTs as precursors and are subsequently polymerized by thermal annealing. This polymerization increases the effective conjugation length of the thiophenes, as confirmed by transmission electron microscopy and absorption peak red shifts. This work also demonstrates that these polythiophenes can serve as effective markers for individual CNTs during Raman imaging with single-wavelength laser excitation due to their strong absorbance. In addition, stable carrier injection into the encapsulated polythiophenes is found to be possible via electrochemical doping. Such doping has the potential to produce π-electron-based one-dimensional conductive wires and highly stable electrochromic devices.

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Charge Manipulation in Molecules Encapsulated Inside Single-Wall Carbon Nanotubes

Cited by 18 publications

References 18 publications

Intersubband plasmons in the quantum limit in gated and aligned carbon nanotubes

Intersubband plasmons in the quantum limit in gated and aligned carbon nanotubes

Linear carbon chains encapsulated in multiwall carbon nanotubes: Resonance Raman spectroscopy and transmission electron microscopy studies

Extended-conjugation π-electron systems in carbon nanotubes

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