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Title: | Growth, structural and plasma illumination properties of nanocrystalline diamond-decorated graphene nanoflakes | Authors: | KAMATCHI JOTHIRAMALINGAM, Sankaran Chang, Ting Hsun Bikkarolla, Santosh Kumar Roy, Susanta Sinha Papakonstantinou, Pagona DRIJKONINGEN, Sien POBEDINSKAS, Paulius VAN BAEL, Marlies Tai, Nyan-Hwa Lin, I. -Nan HAENEN, Ken |
Issue Date: | 2016 | Publisher: | ROYAL SOC CHEMISTRY | Source: | RSC ADVANCES, 6(68), p. 63178-63184 | Abstract: | The improvement of the plasma illumination (PI) properties of a microplasma device due to the application of nanocrystalline diamond-decorated graphene nanoflakes (NCD-GNFs) as a cathode is investigated. The improved plasma illumination (PI) behavior is closely related to the enhanced field electron emission (FEE) properties of the NCD-GNFs. The NCD-GNFs possess better FEE characteristics with a low turn-on field of 9.36 V mu m(-1) to induce the field emission, a high FEE current density of 2.57 mA cm(-2) and a large field enhancement factor of 2380. The plasma can be triggered at a low voltage of 380 V, attaining a large plasma current density of 3.8 mA cm(-2) at an applied voltage of 570 V. In addition, the NCD-GNF cathode shows enhanced lifetime stability of more than 21 min at an applied voltage of 430 V without showing any sign of degradation, whereas the bare GNFs can last only 4 min. The superior FEE and PI properties of the NCD-GNFs are ascribed to the unique combination of diamond and graphene. Transmission electron microscopic studies reveal that the NCD-GNFs contain nano-sized diamond films evenly decorated on the GNFs. Nanographitic phases in the grain boundaries of the diamond grains form electron transport networks that lead to improvement in the FEE characteristics of the NCD-GNFs. | Notes: | [Sankaran, Kamatchi Jothiramalingam; Drijkoningen, Sien; Pobedinskas, Paulius; Van Bael, Marlies K.; Haenen, Ken] Hasselt Univ, Inst Mat Res IMO, Diepenbeek, Belgium. [Sankaran, Kamatchi Jothiramalingam; Drijkoningen, Sien; Pobedinskas, Paulius; Van Bael, Marlies K.; Haenen, Ken] IMOMEC, IMEC Vzw, Diepenbeek, Belgium. [Chang, Ting Hsun; Tai, Nyan-Hwa] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu, Taiwan. [Bikkarolla, Santosh Kumar; Papakonstantinou, Pagona] Univ Ulster, Engn Res Inst, Sch Engn, Newtownabbey, Ulster, North Ireland. [Roy, Susanta Sinha] Shiv Nadar Univ, Dept Phys, Greater Noida, Uttar Pradesh, India. [Lin, I. -Nan] Tamkang Univ, Dept Phys, Tamsui, Taiwan. | Document URI: | http://hdl.handle.net/1942/22051 | e-ISSN: | 2046-2069 | DOI: | 10.1039/c6ra07116c | ISI #: | 000379493900009 | Rights: | This journal is © The Royal Society of Chemistry 2016 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2017 |
Appears in Collections: | Research publications |
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