Fabrication and Optical Probing of Highly Extended, Ultrathin Graphene Nanoribbons in Carbon Nanotubes

Lim, Hong En; Miyata, Yasumitsu; Fujihara, Miho; Okada, Susumu; Liu, Zheng; Arifin, Arifin; Sato, Kayoko; Omachi, Haruka; Kitaura, Ryo; Irle, Stephan; Suenaga, Kazu; Shinohara, Hisanori

doi:10.1021/nn507408m

Cited by 38 publications

(35 citation statements)

References 38 publications

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“…30a). 280 The excitonic absorption peaks of the nanotubes were efficiently suppressed, revealing the optical transitions of the coronenebased GNRs at 1.5 and 3.4 eV. The structures of the resulting GNRs were dependent on the starting monomer.…”

Section: Synthesis Of Gnrs Confined In Carbon Nanotubesmentioning

confidence: 97%

New advances in nanographene chemistry

et al. 2015

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Nanographenes, or extended polycyclic aromatic hydrocarbons, have been attracting renewed and more widespread attention since the first experimental demonstration of graphene in 2004. However, the atomically precise fabrication of nanographenes has thus far been achieved only through synthetic organic chemistry. The precise synthesis of quasi-zero-dimensional nanographenes, i.e. graphene molecules, has witnessed rapid developments over the past few years, and these developments can be summarized in four categories: (1) non-conventional methods, (2) structures incorporating seven- or eight-membered rings, (3) selective heteroatom doping, and (4) direct edge functionalization. On the other hand, one-dimensional extension of the graphene molecules leads to the formation of graphene nanoribbons (GNRs) with high aspect ratios. The synthesis of structurally well-defined GNRs has been achieved by extending nanographene synthesis to longitudinally extended polymeric systems. Access to GNRs thus becomes possible through the solution-mediated or surface-assisted cyclodehydrogenation, or "graphitization," of tailor-made polyphenylene precursors. In this review, we describe recent progress in the "bottom-up" chemical syntheses of structurally well-defined nanographenes, namely graphene molecules and GNRs.

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Section: Synthesis Of Gnrs Confined In Carbon Nanotubesmentioning

confidence: 97%

New advances in nanographene chemistry

et al. 2015

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“…There are, however, some unsavory points corresponding to reproducibility and yield of graphene liquid cells because of vulnerability of low-crystalline graphene sheets. It is important to utilize high-quality graphene to ease the fabrication of the graphene liquid cells as well as of graphene nano-ribbons [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Efficient preparation of graphene liquid cell utilizing direct transfer with large-area well-stitched graphene

Sasaki

Kitaura

Yuk

et al. 2016

Chemical Physics Letters

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By utilizing graphene-sandwiched structures recently developed in this laboratory, we are able to visualize small droplets of liquids in nanometer scale. We have found that small water droplets as small as several tens of nanometers sandwiched by two single-layer graphene are frequently observed by TEM. Due to the electron beam irradiation during the TEM observation, these sandwiched droplets are frequently moving from one place to another and are subjected to create small bubbles inside. The synthesis of a large area single-domain graphene of high-quality is essential to prepare the graphene sandwiched cell which safely encapsulates the droplets in nanometer size.

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“…Such differences suggest that the lengths of the formed graphene ribbons are different, depending on the annealing temperature. It has been reported that higher annealing temperature will induce further polymerization of coronene molecules into longer GRNs when coronene is used as the precursor into the nanotubes . According to early literatures, the peak profile of the encapsulated GNRAs annealed at 300 °C and 400 °C shows some similarities with the spectrum of terrylene, while the spectra of the samples annealed above 400 °C are similar to the spectrum of quaterrylene.…”

Section: Resultsmentioning

confidence: 99%

“…The modification of the GNRs width and edge structure holds great prospects in a wide range of devices applications. It has been reported that fusion of precursor molecules filled in a template such as carbon nanotubes is an efficient way to fabricate GNRs, which is a promising way to synthesize GNRs with different sizes and edge configuration. Very recently, Talyzin et al filled polycyclic aromatic hydrocarbons (PAHs) molecules into carbon nanotubes and found that GNRs can be formed inside the tubes by polymerization of PAH molecules .…”

Section: Introductionmentioning

confidence: 99%

Raman study of graphene nanoribbon analogs confined in single‐walled carbon nanotubes and their high‐pressure transformations

Yang

Yao

Zhang

et al. 2017

J Raman Spectroscopy

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Single wall carbon nanotubes with a diameter distribution from 1.30 to 1.55 nm filled with perylene molecules were synthesized via a vapor‐phase encapsulation method. The perylene molecules formed short‐chain nanoribbon analogs inside the tubes by polymerization. The polymerization of perylene molecules is found to be dependent on the annealing temperature and thus the length of the formed nanoribbons. High‐pressure transformation of the formed hybrid nanostructure has been studied by means of Raman spectroscopy combined with theoretical simulation. It is found that the encapsulated nanoribbon analogs can act as a probe for identifying the structural transitions of the host nanotubes. In comparison to empty carbon nanotube, filling with nanoribbon analogs into the nanotubes decreases the collapse pressure of the nanotubes, which can be explained in terms of their inhomogeneous interactions between the fillers and carbon nanotubes. Our theoretical calculation gives further insight into the experimental observations. Copyright © 2017 John Wiley & Sons, Ltd.

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Fabrication and Optical Probing of Highly Extended, Ultrathin Graphene Nanoribbons in Carbon Nanotubes

Cited by 38 publications

References 38 publications

New advances in nanographene chemistry

New advances in nanographene chemistry

Efficient preparation of graphene liquid cell utilizing direct transfer with large-area well-stitched graphene

Raman study of graphene nanoribbon analogs confined in single‐walled carbon nanotubes and their high‐pressure transformations

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