期刊
NANOTECHNOLOGY
卷 32, 期 24, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/abec08
关键词
synthetic nanochannel; sensing; basal plane interaction; current rectification; track-etching
资金
- DAAD (German Academic Exchange Service) Germany [57402832]
- Higher Education Commission (HEC) Pakistan [9980/Federal/NRPU/ RD/HEC/2017]
- Higher Education Commission (HEC) Pakistan under the Indigenous Fellowship Scheme Phase-II Batch-V
By modifying a nanochannel surface with zinc oxide nanoparticles, the recognition of La3+ ions was achieved with a significant response observed. This nanofluidic system is expected to be used for designing highly sensitive metal ion detection devices.
A significant increase of rare earth transition metals concentration in water reservoirs caused by the dumping of household materials and petrol-producing industries is a potential threat to human and aquatic life. Here, we demonstrate a model nanofluidic channel for the Lanthanum (La3+) ions recognition. To this end, a single conical nanochannel is first modified with poly allylamine hydrochloride followed by immobilization of synthesized ZnO nanoparticles on the channel surface through electrostatic adsorption. A significant change in the nanopore electrical readout is noticed when the functionalized nanochannel is exposed to an electrolyte solution having La3+ cations. The distinctive response by the nanofluidic system towards La3+ ions is assumed to be due to ionic radii, hexagonal crystal structure, and associated basal plane interaction between anchored ZnO nanoparticles and La3+ ions. We anticipate that this nanofluidic system can be used as a model to design highly sensitive metal ion detection devices.
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