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Prospects for microwave plasma synthesized N-graphene in secondary electron emission mitigation applications.

Abstract：

:The ability to change the secondary electron emission properties of nitrogen-doped graphene (N-graphene) has been demonstrated. To this end, a novel microwave plasma-enabled scalable route for continuous and controllable fabrication of free-standing N-graphene sheets was developed. High-quality N-graphene with prescribed structural qualities was produced at a rate of 0.5 mg/min by tailoring the high energy density plasma environment. Up to 8% of nitrogen doping levels were achieved while keeping the oxygen content at residual amounts (~ 1%). The synthesis is accomplished via a single step, at atmospheric conditions, using ethanol/methane and ammonia/methylamine as carbon and nitrogen precursors. The type and level of doping is affected by the position where the N-precursor is injected in the plasma environment and by the type of precursors used. Importantly, N atoms incorporated predominantly in pyridinic/pyrrolic functional groups alter the performance of the collective electronic oscillations, i.e. plasmons, of graphene. For the first time it has been demonstrated that the synergistic effect between the electronic structure changes and the reduction of graphene π-plasmons caused by N doping, along with the peculiar "crumpled" morphology, leads to sub-unitary (< 1) secondary electron yields. N-graphene can be considered as a prospective low secondary electron emission and plasmonic material.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Bundaleska N,Dias A,Bundaleski N,Felizardo E,Henriques J,Tsyganov D,Abrashev M,Valcheva E,Kissovski J,Ferraria AM,do Rego AMB,Almeida A,Zavašnik J,Cvelbar U,Teodoro OMND,Strunskus T,Tatarova E

doi

10.1038/s41598-020-69844-9

subject

Has Abstract

pub_date

2020-08-03 00:00:00

pages

13013

issue

1

issn

2045-2322

pii

10.1038/s41598-020-69844-9

journal_volume

10

pub_type

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