期刊
ACS CENTRAL SCIENCE
卷 6, 期 4, 页码 507-512出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscentsci.0c00022
关键词
-
资金
- NSERC postdoctoral fellowship from the Government of Canada
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2019/04154-9]
- National Science Foundation [DMR-1809740]
- U.S. Army Engineer Research and Development Center Environmental Quality Technology Program [W912HZ-17-2-0027]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [19/04154-9] Funding Source: FAPESP
Ethylene is a dynamic plant hormone, and its temporal monitoring can be used to glean insight into plant health and status. However, the real-time distributed detection of ethylene at trace levels under ambient conditions remains a challenge. We report a single-walled carbon nanotube-based chemiresistor catalyst combination that can detect ppb levels of ethylene in air. Cycling between Pd(II) and Pd(0) via Wacker oxidation with a nitrite cocatalyst imparts response discrimination driven by the chemoselectivity of the chemical transformation. Sensitivity is controlled by a combination of the chemical reaction efficiency and the n-doping strength of the Pd(0) species generated in situ. The covalent functionalization of the carbon nanotube sidewall with pyridyl ligands drastically improves the device sensitivity via enhanced n-doping. The utility of this ethylene sensor is demonstrated in the monitoring of senescence in red carnations and purple lisianthus flowers.
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