Few-layer graphene synthesis on a dielectric substrate

Kaplas, Tommi; Sharma, Deepika; Svirko, Yuri

doi:10.1016/j.carbon.2011.11.020

Cited by 40 publications

(43 citation statements)

References 34 publications

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“…Compared to the wealth of information available in current literature about the CVD (Chemical Vapor Deposition) of graphene onto Cu foils [1], there is a dearth of experimental studies dealing with the use of Cu thin (< 500 nm) films as substrates [2][3][4][5]. However, these latter offer several advantages: first, they are deposited in High Vacuum environments and show less contamination than commercial foils, second, the small amount of the Cu substrate make the graphene transfer process much less invasive, third, the use of films makes the process more compatible with the current microelectronics technology.…”

Section: Introductionmentioning

confidence: 99%

In situ control of dewetting of Cu thin films in graphene chemical vapor deposition

2014

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Abstract.Chemical Vapor Deposition (CVD) on Cu thin films is a promising approach for the large area formation of graphene on dielectric substrates, but a fine control of the deposition parameters is required to avoid dewetting of the Cu catalyst. In this paper we report on the study of the Cu dewetting phenomena by monitoring the intensity of the infra-red emission from the film surface during Rapid Thermal CVD of graphene. The reduction of Cu film coverage consequent to dewetting is detected as a variation of sample's emissivity. Results indicate three time constants of dewetting, describing three typical stages, hole formation, propagation and ligament breakup. Slowing the first incubation stage by tuning pressure in the chamber allows for an effective surface activation resulting in the deposition of graphene at temperatures lower than in the case of Cu foils.

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Section: Introductionmentioning

confidence: 99%

In situ control of dewetting of Cu thin films in graphene chemical vapor deposition

2014

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“…Kaplas et al [82] grow graphene on ruptured copper droplets that were deposited in a fused silica substrate. The fact that the copper is ruptured allows the graphene to grow both on the surface of the copper as well as the copper-silica interface.…”

Section: Graphenementioning

confidence: 99%

Graphene NanoPlatelets Reinforced Tantalum Carbide consolidated by Spark Plasma Sintering

Nieto¹

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“…Among large number of papers devoted to a direct graphene synthesis on dielectric substrates, the CVD based technique that utilizes sacrificial pre-deposited copper nanolayer deposited on a dielectric substrate is of special interest [4][5][6]. In this technique, the predeposited thin copper layer ensures catalytic synthesis of graphene on its surface.…”

Section: Introductionmentioning

confidence: 99%

“…However, since the thickness of the copper film is small, the sheet of highly crystalline graphene grows on both top (i.e. copper/atmosphere) and bottom (copper/substrate) interfaces [5,6]. Thus, by removing the copper film (along with the top graphene), one arrives at a few-layer graphene deposited on the dielectric substrate.…”

Section: Introductionmentioning

confidence: 99%

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Optical characterization of directly deposited graphene on a dielectric substrate

Kaplas¹,

Karvonen²,

Ahmadi³

et al. 2016

Opt. Express

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By using scanning multiphoton microscopy we compare the nonlinear optical properties of the directly deposited and transferred to the dielectric substrate graphene. The direct deposition of graphene on oxidized silicon wafer was done by utilizing sacrificial copper catalyst film. We demonstrate that the directly deposited graphene and bi-layered transferred graphene produce comparable third harmonic signals and have almost the same damage thresholds. Therefore, we believe directly deposited graphene is suitable for the use of e.g. nanofabricated optical setups. Lipsanen, and K. Kieu, "Rapid large-area multiphoton microscopy for characterization of graphene," ACS Nano 7(10), 8441-8446 (2013). 13. K. Kieu, S. Mehravar, R. Gowda, R. A. Norwood, and N. Peyghambarian, "Label-free multi-photon imaging using a compact femtosecond fiber laser mode-locked by carbon nanotube saturable absorber," Biomed. Opt. Express 4(10), 2187-2195 (2013). 14. L. Karvonen, A. Säynätjoki, S. Mehravar, R. D. Rodriguez, S. Hartmann, D. R. T. Zahn, S. Honkanen, R. A.Norwood, N. Peyghambarian, K. Kieu, H. Lipsanen, and J. Riikonen, "Investigation of second-and thirdharmonic generation in few-layer gallium selenide by multiphoton microscopy," Sci. Rep. 5, 10334 (2015). #253966

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Few-layer graphene synthesis on a dielectric substrate

Cited by 40 publications

References 34 publications

In situ control of dewetting of Cu thin films in graphene chemical vapor deposition

In situ control of dewetting of Cu thin films in graphene chemical vapor deposition

Graphene NanoPlatelets Reinforced Tantalum Carbide consolidated by Spark Plasma Sintering

Optical characterization of directly deposited graphene on a dielectric substrate

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