Direct patterned growth of intrinsic/doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission application
Vertical graphene nanosheets (VGNs), normally consisting of one to several graphene layers vertically aligned on substrates, are promising in a variety of applications including field electron emitters, gas sensors and energy storage devices. Herein, we report a simple, green, easily scalable and co...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019-01-01
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| Series: | Materials & Design |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127518308621 |
| _version_ | 1811289860202299392 |
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| author | Xin Guo Yali Li Yongqiang Ding Qiang Chen Junshuai Li |
| author_facet | Xin Guo Yali Li Yongqiang Ding Qiang Chen Junshuai Li |
| author_sort | Xin Guo |
| collection | DOAJ |
| description | Vertical graphene nanosheets (VGNs), normally consisting of one to several graphene layers vertically aligned on substrates, are promising in a variety of applications including field electron emitters, gas sensors and energy storage devices. Herein, we report a simple, green, easily scalable and cost-effective strategy of growing both intrinsic and nitrogen (N)-doped VGNs on stainless steel (SS) just by heating the solid thin layers of glucose and/or urea in a resistance-heating furnace. It is interesting that VGNs mainly grow on the roughened regions, which can be attributed to the more nucleation and catalyzing sites on such regions than smooth SS. Meanwhile, the N doping concentration can be adjusted by varying the urea addition. Field electron emission measurement indicates that the obtained N-doped VGNs exhibit excellent field emission with a relatively low turn-on electric field strength (~2.6 V μm−1 at the current density of 10 μA cm−2), large field enhancement factor (~9428) and high stability. Keywords: Vertical graphene nanosheets, Nitrogen doping, Direct patterned growth, Green synthesis, Field electron emission |
| first_indexed | 2024-04-13T04:01:36Z |
| format | Article |
| id | doaj.art-ed7e2a5d8efe41abbc478c345148f5f5 |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-04-13T04:01:36Z |
| publishDate | 2019-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-ed7e2a5d8efe41abbc478c345148f5f52022-12-22T03:03:27ZengElsevierMaterials & Design0264-12752019-01-01162293299Direct patterned growth of intrinsic/doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission applicationXin Guo0Yali Li1Yongqiang Ding2Qiang Chen3Junshuai Li4Key Laboratory of Special Function Materials & Structure Design of the Ministry of Education, School of Physical Science & Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, ChinaKey Laboratory of Special Function Materials & Structure Design of the Ministry of Education, School of Physical Science & Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, ChinaKey Laboratory of Special Function Materials & Structure Design of the Ministry of Education, School of Physical Science & Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, ChinaInstitute of Electromagnetics & Acoustics, Department of Electronic Science, Fujian Provincial Key Laboratory of Plasma & Magnetic Resonance, Xiamen University, Xiamen 361005, ChinaKey Laboratory of Special Function Materials & Structure Design of the Ministry of Education, School of Physical Science & Technology, Lanzhou University, 222 South Tianshui Road, Lanzhou 730000, China; Corresponding author.Vertical graphene nanosheets (VGNs), normally consisting of one to several graphene layers vertically aligned on substrates, are promising in a variety of applications including field electron emitters, gas sensors and energy storage devices. Herein, we report a simple, green, easily scalable and cost-effective strategy of growing both intrinsic and nitrogen (N)-doped VGNs on stainless steel (SS) just by heating the solid thin layers of glucose and/or urea in a resistance-heating furnace. It is interesting that VGNs mainly grow on the roughened regions, which can be attributed to the more nucleation and catalyzing sites on such regions than smooth SS. Meanwhile, the N doping concentration can be adjusted by varying the urea addition. Field electron emission measurement indicates that the obtained N-doped VGNs exhibit excellent field emission with a relatively low turn-on electric field strength (~2.6 V μm−1 at the current density of 10 μA cm−2), large field enhancement factor (~9428) and high stability. Keywords: Vertical graphene nanosheets, Nitrogen doping, Direct patterned growth, Green synthesis, Field electron emissionhttp://www.sciencedirect.com/science/article/pii/S0264127518308621 |
| spellingShingle | Xin Guo Yali Li Yongqiang Ding Qiang Chen Junshuai Li Direct patterned growth of intrinsic/doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission application Materials & Design |
| title | Direct patterned growth of intrinsic/doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission application |
| title_full | Direct patterned growth of intrinsic/doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission application |
| title_fullStr | Direct patterned growth of intrinsic/doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission application |
| title_full_unstemmed | Direct patterned growth of intrinsic/doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission application |
| title_short | Direct patterned growth of intrinsic/doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission application |
| title_sort | direct patterned growth of intrinsic doped vertical graphene nanosheets on stainless steel via heating solid precursor films for field emission application |
| url | http://www.sciencedirect.com/science/article/pii/S0264127518308621 |
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