Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/81370
PIRA download icon_1.1View/Download Full Text
Title: Electrochemically assisted flexible lanthanide upconversion luminescence sensing of heavy metal contamination with high sensitivity and selectivity
Authors: Wong, YT 
Pang, SY 
Tsang, MK 
Liu, Y 
Huang, HT 
Yu, SF 
Hao, JH 
Issue Date: 2019
Source: Nanoscale advances, 1 Jan. 2019, v. 1, no. 1, p. 265-272
Abstract: Heavy metal contamination in water can pose lethal threats to public health; therefore it is highly desired to develop a rapid and sensitive sensor for monitoring water quality. Owing to their superior optical features, upconversion nanoparticles (UCNPs) are widely explored to detect metal ions based on resonance energy transfer to dye quenchers. However, these schemes heavily rely on the optical properties of the molecules, which limits the flexibility of the probe design. Herein, a flexible carbon fiber cloth/UCNP composite probe was fabricated for sensing copper(II) (Cu2+) ions and an electrochemical (E-chem) technique was implemented for the first time to enhance its sensing performance. By applying 0.3 V on the composite probe, Cu2+ ions can be effectively accumulated through oxidation, yielding a remarkable improvement in the selectivity and sensitivity. A more outstanding detection limit of the sensor was achieved at 82 ppb under the E-chem assistance, with 300-fold enhancement compared to the detection without the E-chem effect. This sensing approach can be an alternative to molecular quenchers and open up new possibilities for simple, rapid and portable sensing of metal ions.
Publisher: Royal Society of Chemistry
Journal: Nanoscale advances 
EISSN: 2516-0230
DOI: 10.1039/c8na00012c
Rights: This journal is © The Royal Society of Chemistry 2019
This article is licensed under a Creative Commons Attibution-NonCommercial 3.0 Unported Licence (https://creativecommons.org/licenses/by-nc/3.0/)
The following publication Wong, Y. T., Pang, S. Y., Tsang, M. K., Liu, Y., Huang, H. T., Yu, S. F., & Hao, J. H. (2019). Electrochemically assisted flexible lanthanide upconversion luminescence sensing of heavy metal contamination with high sensitivity and selectivity. Nanoscale Advances, 1(1), 265-272 is available at https://dx.doi.org/10.1039/c8na00012c
Appears in Collections:Journal/Magazine Article

Files in This Item:
File Description SizeFormat 
Wong_Electrochemically_Assisted_Flexible.pdf831.49 kBAdobe PDFView/Open
Open Access Information
Status open access
File Version Version of Record
Access
View full-text via PolyU eLinks SFX Query
Show full item record

Page views

211
Last Week
0
Last month
Citations as of Mar 24, 2024

Downloads

92
Citations as of Mar 24, 2024

SCOPUSTM   
Citations

14
Citations as of Mar 28, 2024

WEB OF SCIENCETM
Citations

13
Citations as of Mar 28, 2024

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.