Direct imaging of light-element impurities in graphene reveals triple-coordinated oxygen

被引：43

作者：

Hofer, Christoph ^{[1
,2
,3
]}

Skakalova, Viera ^{[1
]}

Goerlich, Tobias ^{[1
]}

Tripathi, Mukesh ^{[1
]}

Mittelberger, Andreas ^{[1
]}

Mangler, Clemens ^{[1
]}

Monazam, Mohammad Reza Ahmadpour ^{[1
]}

Susi, Toma ^{[1
]}

Kotakoski, Jani ^{[1
]}

Meyer, Jannik C. ^{[1
,2
,3
]}

机构：

[1] Univ Vienna, Fac Phys, Boltzmanngasse 5, A-1090 Vienna, Austria

[2] Eberhard Karls Univ Tuebingen, Inst Appl Phys, Morgenstelle 10, D-72076 Tubingen, Germany

[3] Univ Tubingen, Nat & Med Sci Inst, Markwiesenstr 55, D-72770 Reutlingen, Germany

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

奥地利科学基金会; 欧洲研究理事会;

关键词：

NITROGEN-DOPED GRAPHENE; ATOMIC-STRUCTURE; OXIDE; CHEMISTRY; DYNAMICS;

D O I：

10.1038/s41467-019-12537-3

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Along with hydrogen, carbon, nitrogen and oxygen are the arguably most important elements for organic chemistry. Due to their rich variety of possible bonding configurations, they can form a staggering number of compounds. Here, we present a detailed analysis of nitrogen and oxygen bonding configurations in a defective carbon (graphene) lattice. Using aberration-corrected scanning transmission electron microscopy and single-atom electron energy loss spectroscopy, we directly imaged oxygen atoms in graphene oxide, as well as nitrogen atoms implanted into graphene. The collected data allows us to compare nitrogen and oxygen bonding configurations, showing clear differences between the two elements. As expected, nitrogen forms either two or three bonds with neighboring carbon atoms, with three bonds being the preferred configuration. Oxygen, by contrast, tends to bind with only two carbon atoms. Remarkably, however, triple-coordinated oxygen with three carbon neighbors is also observed, a configuration that is exceedingly rare in organic compounds.

引用

页数：8

共 37 条

[1] Atomistic simulations of the implantation of low-energy boron and nitrogen ions into graphene [J].