Spin-dependent band-gap driven by nitrogen and oxygen functional groups in zigzag graphene nanoribbons

2020 ◽  
Vol 521 ◽  
pp. 146435 ◽  
Author(s):  
Florentino López-Urías ◽  
Juan L. Fajardo-Díaz ◽  
Alejandro J. Cortés-López ◽  
Cristina L. Rodríguez-Corvera ◽  
Luis E. Jiménez-Ramírez ◽  
...  
Keyword(s):  
Band Gap ◽  
Functional Groups ◽  
Graphene Nanoribbons ◽  
Oxygen Functional Groups ◽  
Zigzag Graphene Nanoribbons

scholarly journals Chemical Functionalization of Graphene Nanoribbons

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Narjes Gorjizadeh ◽  
Yoshiyuki Kawazoe
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Band Gap ◽  
Electronic Properties ◽  
Functional Groups ◽  
Graphene Nanoribbons ◽  
Honeycomb Lattice ◽  
Chemical Functionalization ◽  
Electronic And Magnetic Properties

We review the electronic properties of graphene nanoribbons functionalized by various elements and functional groups. Graphene nanoribbons are strips of graphene, the honeycomb lattice of carbon withsp2hybridization. Basically nanoribbons can be classified into two categories, according to the geometry of their edge, armchair, and zigzag, which determine their electronic structure. Due to their fascinating electronic and magnetic properties many applications has been suggested for these materials. One of the major methods to use graphene nanoribbons in future applications is chemical functionalization of these materials to make an engineering on their band gap. In this review, we introduce various types of modifying graphene nanoribbons to meet their promising applications.

Spin and band-gap engineering in zigzag graphene nanoribbons with methylene group

2014 ◽  
Vol 63 ◽  
pp. 259-263 ◽  
Author(s):  
Liang Xu ◽  
Lingling Wang ◽  
Weiqing Huang ◽  
Xiaofei Li ◽  
Wenzhi Xiao
Keyword(s):  
Band Gap ◽  
Graphene Nanoribbons ◽  
Band Gap Engineering ◽  
Methylene Group ◽  
Zigzag Graphene Nanoribbons

Band Gap Engineering in Zigzag Graphene Nanoribbons—An Ab Initio Approach

2012 ◽  
Vol 9 (8) ◽  
pp. 1084-1089 ◽  
Author(s):  
Satyendra Singh Chauhan ◽  
Pankaj Srivastava ◽  
Ashwani Kumar Shrivastava
Keyword(s):  
Ab Initio ◽  
Band Gap ◽  
Graphene Nanoribbons ◽  
Band Gap Engineering ◽  
Ab Initio Approach ◽  
Zigzag Graphene Nanoribbons

Topological Surface State in Epitaxial Zigzag Graphene Nanoribbons

Nano Letters ◽  
2021 ◽  
Vol 21 (7) ◽  
pp. 2876-2882
Author(s):  
Thi Thuy Nhung Nguyen ◽  
Niels de Vries ◽  
Hrag Karakachian ◽  
Markus Gruschwitz ◽  
Johannes Aprojanz ◽  
...  
Keyword(s):  
Surface State ◽  
Graphene Nanoribbons ◽  
Topological Surface ◽  
Topological Surface State ◽  
Zigzag Graphene Nanoribbons

scholarly journals Electrochemical Evaluation of Surface Modified Free-Standing CNT Electrode for Li–O2 Battery Cathode

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4196
Author(s):  
Ji Hyeon Lee ◽  
Hyun Wook Jung ◽  
In Soo Kim ◽  
Min Park ◽  
Hyung-Seok Kim
Keyword(s):  
Functional Groups ◽  
Atomic Layer ◽  
Free Standing ◽  
Coating Technology ◽  
Oxygen Functional Groups ◽  
Layer Deposition ◽  
Discharge Product ◽  
Effect Of Oxygen ◽  
Surface Modified ◽  
Electrochemical Evaluation

In this study, carbon nanotubes (CNTs) were used as cathodes for lithium–oxygen (Li–O2) batteries to confirm the effect of oxygen functional groups present on the CNT surface on Li–O2 battery performance. A coating technology using atomic layer deposition was introduced to remove the oxygen functional groups present on the CNT surface, and ZnO without catalytic properties was adopted as a coating material to exclude the effect of catalytic reaction. An acid treatment process (H2SO4:HNO3 = 3:1) was conducted to increase the oxygen functional groups of the existing CNTs. Therefore, it was confirmed that ZnO@CNT with reduced oxygen functional groups lowered the charging overpotential by approximately 230 mV and increased the yield of Li2O2, a discharge product, by approximately 13%. Hence, we can conclude that the ZnO@CNT is suitable as a cathode material for Li–O2 batteries.

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