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Angew Chem Int Ed Engl. 2018 Apr 3;57(15):3922-3926. doi: 10.1002/anie.201709417. Epub 2018 Mar 6.

Carbon Atom Hybridization Matters: Ultrafast Humidity Response of Graphdiyne Oxides.

Yan H1,2, Guo S1,2, Wu F1,2, Yu P1,2, Liu H3,2, Li Y3,2, Mao L1,2.

Author information

1
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, the, Chinese Academy of Sciences (CAS), Beijing, 100190, China.
2
University of Chinese Academy of Sciences, Beijing, 100049, China.
3
CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Abstract

Graphdiyne oxide (GDO), the oxidized form of graphdiyne (GDY), exhibits an ultrafast humidity response with an unprecedented response speed (ca. 7 ms), which is three times faster than that of graphene oxide (GO) with the same thickness and O/C ratio. The ultrafast humidity response of GDO is considered to benefit from the unique carbon hybridization of GDO, which contains acetylenic bonds that are more electron-withdrawing than ethylenic bonds in GO, consequently giving rise to a faster binding rate with water. This distinctive structure-based property enables the fabrication of a novel GDO-based humidity sensor with an ultrafast response speed and good selectivity against other kinds of gas molecules as well as high sensitivity. These properties allow the sensor to accurately monitor the respiration rate change of human and hypoxic rats.

KEYWORDS:

2D carbon materials; graphdiyne oxide; respiratory monitoring; touchless sensors; ultrafast humidity sensing

PMID:
29457690
DOI:
10.1002/anie.201709417

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