Direct growth of nanographene at low temperature from carbon black for highly sensitive temperature detectors

Li, Ké; Cai, Zhi; Li, Menglin; Liu, Donghua; Cao, Min; Xia, Dongyun; Jin, Zhepeng; Wang, Zhen; Dong, Lan; Xu, Xiangfan; Wei, Dacheng

doi:10.1088/0957-4484/27/50/505603

Cited by 11 publications

(6 citation statements)

References 44 publications

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“…Limit of detection was only 0.6 Pa, showing the potential in detecting human physiological signals such as heart rate. Similar structures were also used in electronic skins, temperature sensors (Figure c), , etc.…”

Section: Applications Of 2d Materials Grown By Pecvdmentioning

confidence: 99%

“…In this Account, we summarize the recent progress on PECVD preparation of 2D materials and their applications (Figure ). These materials include graphene crystals, , graphene quantum dots (GQDs), graphene nanowalls (GNWs), , h -BN, B–C–N ternary materials (BC x N), and other categories, , which can be directly used in field-effect transistors (FETs), , device dielectrics, sensors, ,,− surface enhanced Raman scattering (SERS) substrates, and so on.…”

Section: Introductionmentioning

confidence: 99%

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Plasma-Enhanced Chemical Vapor Deposition of Two-Dimensional Materials for Applications

Liu

Chen

et al. 2021

Acc. Chem. Res.

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Conspectus Since the rise of two-dimensional (2D) materials, synthetic methods including mechanical exfoliation, solution synthesis, and chemical vapor deposition (CVD) have been developed. Mechanical exfoliation prepares randomly shaped materials with small size. Solution synthesis introduces impurities that degrade the performances. CVD is the most successful one for low-cost scalable preparation. However, when it comes to practical applications, disadvantages such as high operating temperature (∼1000 °C), probable usage of metal catalysts, contamination, defects, and interstices introduced by postgrowth transfer are not negligible. These are the reasons why plasma-enhanced CVD (PECVD), a method that enables catalyst-free in situ preparation at low temperature, is imperatively desirable. In this Account, we summarize our recent progress on controllable preparation of 2D materials by PECVD and their applications. We found that there was a competition between etching and nucleation and deposition in PECVD, making it highly controllable to obtain desired materials. Under different equilibrium states of the competition, various 2D materials with diverse morphologies and properties were prepared including pristine or nitrogen-doped graphene crystals, graphene quantum dots, graphene nanowalls, hexagonal boron nitride (h-BN), B–C–N ternary materials (BC x N), etc. We also used mild plasma to modify or treat 2D materials (e.g., WSe2) for desired properties. PECVD has advantages such as low temperature, transfer-free process, and industrial compatibility, which enable facile, scalable, and low-cost preparation of 2D materials with clean surfaces and interfaces directly on noncatalytic substrates. These merits significantly benefit the as-prepared materials in the applications. Field-effect transistors with high motilities were directly fabricated on graphene and nitrogen-doped graphene. By use of h-BN as the dielectric interfacial layer, both mobilities and saturated power densities of the devices were improved owing to the clean, closely contacted interface and enhanced interfacial thermal dissipation. High-quality materials and interfaces also enabled promising applications of these materials in photodetectors, pressure sensors, biochemical sensors, electronic skins, Raman enhancement, etc. To demonstrate the commercial applications, several prototypical devices were studied such as distributed pressure sensor arrays, touching module on a robot hand for braille recognition, and smart gloves for recording sign language. Finally, we discuss opportunities and challenges of PECVD as a comprehensive preparation methodology of 2D materials for future applications beyond traditional CVD.

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Section: Applications Of 2d Materials Grown By Pecvdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Plasma-Enhanced Chemical Vapor Deposition of Two-Dimensional Materials for Applications

Liu

Chen

et al. 2021

Acc. Chem. Res.

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“…4) Nanographene is a two-dimensional material consisting of carbon atoms arranged in a hexagonal lattice. [5][6][7][8] The electrical, optical, and magnetic properties of graphene nanoribbons (GNRs) can be controlled by changing the width and edge structure of armchair and zigzag. [9][10][11] Nanographene has been synthesized through a bottom-up approach using small molecules with hexagonal lattices, such as pentacene, 12) coronene, 12) rubrene, 12) benzene, 13) and 10,10′-dibromo-9,9′-bianthryl monomers.…”

Section: Introductionmentioning

confidence: 99%

Effects of Ge and Ni catalytic underlayers to nanographene synthesis from pentacene-based film via soft X-ray irradiation

Heya

Kanda

Yamasaki

et al. 2022

Jpn. J. Appl. Phys.

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Herein, carbon films, including pentacene oligomers and pentacene-based precursors, were prepared from pentacene and H2 by hot mesh deposition (HMD). Ge and Ni films were used as catalytic underlayers to facilitate the polymerization of the pentacene-based precursors. Thereafter, the hot mesh-deposited C films on the Ge and Ni underlayers were irradiated with soft X-rays of high photon flux density in the NewSUBARU synchrotron facility. The Raman spectra of the Ni underlayer exhibited sharp peaks of the G and D bands, which possibly originated from the nanographene formed after soft X-ray irradiation. Conversely, for the amorphous and the polycrystalline Ge underlayers, broad peaks corresponding to amorphous C or small-sized graphite were observed despite the high-temperature treatment at approximately 1000 °C during soft X-ray irradiation. Results suggest that the differences between the properties of the Ge and Ni underlayers lead to the observed difference in their catalytic activities.

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“…Graphenes, which are on the order of nanometers, are attractive as two-dimensional (2D) materials consisting of carbon atoms arranged in a hexagonal lattice because of appearing the edge effects. [1][2][3] Graphene nanoribbons (GNRs) are one of the promising candidates for nanographene in the semiconductor field. The electrical, optical, and magnetic properties of GNRs can be controlled with changing their widths and the edge structures of armchair and zigzag.…”

Section: Introductionmentioning

confidence: 99%

Soft X-ray absorption and emission spectra of nanographene prepared from pentacene with hot mesh deposition and soft X-ray irradiation

Heya¹,

Niibe²,

Kanda³

et al. 2021

Jpn. J. Appl. Phys.

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The molecular orientation and partial density of states were evaluated using NewSUBARU by soft X-ray absorption spectroscopy (XAS) and soft X-ray emission spectroscopy measurements. The degree of molecular alignment was degraded by increasing mesh temperature in hot mesh deposition (HMD), in other words, was changed from pentacene (Pn) to 6,13-dihydropentacene (DHP). At a mesh temperature of 1450 °C, the different XAS was obtained due to the mixing effect of Pn and DHP, and presence of Pn oligomer. The HMD carbon film transformed into the graphite-like film and the graphene on the quartz substrate and the Ni/quartz substrate after soft X-ray irradiation, respectively. The HMD carbon film after soft X-ray irradiation showed the peaks due to terminal carbon such as CH n and COOH in comparison with the reported large graphene sheet. It indicates that the flake size of the graphene on the Ni/quartz substrate was small and had many edges.

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Direct growth of nanographene at low temperature from carbon black for highly sensitive temperature detectors

Cited by 11 publications

References 44 publications

Plasma-Enhanced Chemical Vapor Deposition of Two-Dimensional Materials for Applications

Plasma-Enhanced Chemical Vapor Deposition of Two-Dimensional Materials for Applications

Effects of Ge and Ni catalytic underlayers to nanographene synthesis from pentacene-based film via soft X-ray irradiation

Soft X-ray absorption and emission spectra of nanographene prepared from pentacene with hot mesh deposition and soft X-ray irradiation

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