期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 112, 期 47, 页码 14527-14532出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1505993112
关键词
graphene; boron-doped; STM; gas sensor; B-C trimers
资金
- National Natural Science Foundation of China [51372131, 51232005]
- 973 Program of China [2014CB932401, 2015CB932500]
- Multidisciplinary University Research Initiative Project [ARO-W911NF-11-1-0362, AFOSR-FA9550-12-1-0035, AFOSR-FA9550-12-1-0471]
- Pennsylvania State University Center for Nanoscale Science
- Carbon Institute of Science and Technology
- Japan Regional Innovation Strategy Program by the Excellence
- Japan Science and Technology Agency
- Honda Research Institute USA, Inc.
- Royal Society
- Graphene Flagship
- European Research Council
- Scientific User Facilities Division, Office of Basic Energy Sciences, US Department of Energy
- National Fund for Scientific Research (F.R.S.-FNRS) of Belgium
- ARC on Graphene StressTronics by the Communaute Wallonie-Bruxelles
- F.R.S.-FNRS [2.5020]
- Office of Naval Research
Heteroatom doping is an efficient way to modify the chemical and electronic properties of graphene. In particular, boron doping is expected to induce a p-type (boron)-conducting behavior to pristine (non-doped) graphene, which could lead to diverse applications. However, the experimental progress on atomic scale visualization and sensing properties of large-area boron-doped graphene (BG) sheets is still very scarce. This work describes the controlled growth of centimeter size, high-crystallinity BG sheets. Scanning tunneling microscopy and spectroscopy are used to visualize the atomic structure and the local density of states around boron dopants. It is confirmed that BG behaves as a p-type conductor and a unique croissant-like feature is frequently observed within the BG lattice, which is caused by the presence of boron-carbon trimers embedded within the hexagonal lattice. More interestingly, it is demonstrated for the first time that BG exhibits unique sensing capabilities when detecting toxic gases, such as NO2 and NH3, being able to detect extremely low concentrations (e.g., parts per trillion, parts per billion). This work envisions that other attractive applications could now be explored based on as-synthesized BG.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据