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Ultrasensitive Gas Detection of Large-Area Boron-Doped Graphene

Ultrasensitive Gas Detection of Large-Area Boron-Doped Graphene

Ruitao Lv, Gugang Chen, Qing Li, Amber McCreary, Andrés Botello-Méndez, S V Morozov, Liangbo Liang, Xavier Declerck, Nestor Perea-López, David A Cullen, Simin Feng, Ana Laura Elías, Rodolfo Cruz-Silva, etc.

Proc Natl Acad Sci U S A. 2015 Nov 24;112(47):14527-32.

PMID: 26575621

Abstract:

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 (nondoped) 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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76147	Boron-doped graphene			Price

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