An atomic-layer NiO-BaTiO 3 nanocomposite for use in electrochemical sensing of serotonin

An atomic-layer NiO-BaTiO 3 nanocomposite for use in electrochemical sensing of serotonin

The NiO films were deposited on the surface of BaTiO (BTO) by atomic layer deposition (ALD). The thickness of NiO film was controlled by the number of ALD cycles, which the optimum number of ALD cycles were 400 cycles. The morphology of NiO-BTO nanocomposite was observed by x-ray diffraction, scanni...

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Veröffentlicht in:Nanotechnology 2020-12, Vol.31 (50), p.505502
Hauptverfasser: Ran, Gu, Xia, Ying, Zhang, Hengchang, Kuang, Wei, Fu, Chuan
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Xia, Ying
Zhang, Hengchang
Kuang, Wei
Fu, Chuan
description The NiO films were deposited on the surface of BaTiO (BTO) by atomic layer deposition (ALD). The thickness of NiO film was controlled by the number of ALD cycles, which the optimum number of ALD cycles were 400 cycles. The morphology of NiO-BTO nanocomposite was observed by x-ray diffraction, scanning electron microscope, and transmission electron microscopy. The sensor based on NiO-BTO nanocomposite displays good electrocatalytic activity and high sensitivity for serotonin (at 0.36 V vs. Ag/AgCl). In the range of 0.05-5 μM, the concentrations of serotonin are linearly related to current intensity and the detection limit is 0.03 μM (S/N = 3). The NiO-BTO/GCE was successfully applied in serum samples. It shows that the NiO-BTO nanocomposite prepared by ALD can serve as electrochemical sensor devices and applications in the fields of biosensors.
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title An atomic-layer NiO-BaTiO 3 nanocomposite for use in electrochemical sensing of serotonin
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