Flow field-flow fractionation and single particle inductively coupled plasma mass spectrometry as a powerful tool for tracking and understanding the sensing mechanism of Ag-Au bimetallic nanoparticles toward cobalt ions.

Autor: Maknun L; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand; Institute of Analytical and Physical Chemistry for Environment and Materials (UMR5254-IPREM), CNRS, University of Pau, 64053, Pau, France., Sumranjit J; National Nanotechnology Center, National Science and Technology Development Agency, 111 Phahonyothin Rd., Klongluang, Pathumthani, 12120, Thailand., Wutikhun T; National Nanotechnology Center, National Science and Technology Development Agency, 111 Phahonyothin Rd., Klongluang, Pathumthani, 12120, Thailand., Lobinski R; Institute of Analytical and Physical Chemistry for Environment and Materials (UMR5254-IPREM), CNRS, University of Pau, 64053, Pau, France; Analytical Chemistry, Faculty of Chemistry, Warsaw University of Technology, Ul. Noakowskiego 3, 00-664, Warszawa, Poland., Szpunar J; Institute of Analytical and Physical Chemistry for Environment and Materials (UMR5254-IPREM), CNRS, University of Pau, 64053, Pau, France., Siripinyanond A; Department of Chemistry and Center of Excellence for Innovation in Chemistry, Faculty of Science, Mahidol University, Rama VI Road, Bangkok, 10400, Thailand. Electronic address: atitaya.sir@mahidol.ac.th.
Jazyk: angličtina
Zdroj: Analytica chimica acta [Anal Chim Acta] 2024 May 01; Vol. 1301, pp. 342485. Date of Electronic Publication: 2024 Mar 14.
DOI: 10.1016/j.aca.2024.342485
Abstrakt: Background: Ag-Au bimetallic nanoparticles (BNPs), synthesized by using citrate reduction of Ag and Au ions, were used as sensor for detection of Co 2+ . In order to optimize sensing performance, it is necessary to control the particle size and size distribution of the original Ag-Au BNPs. Therefore, analytical methods based on the use of single particle inductively coupled plasma mass spectrometry (SP-ICP-MS) and flow-field flow fractionation (FlFFF)-ICP-MS were developed to track the signal of Ag and Au in bimetallic nanoparticles at each step of the procedure: BNP synthesis, aggregation and sensing in order to understand the sensing mechanism. To better understand colorimetric sensing of Co 2+ using Ag-Au BNPs, various solution mixtures were analyzed by using SP-ICP-MS and FlFFF-ICP-MS.
Results: SP-ICP-MS provided the information on the core size, size distribution and particle number concentration, as well as the heterogeneity of the particles synthesized by using various citrate concentrations and metal ratios. FlFFF-ICP-MS offered the information on hydrodynamic size as well as the signal intensity ratio of Ag and Au in BNPs and for the understanding of the aggregation of BNPs arising from the [Co(II)(en) 3 ] 2+ complex surrounding the surface of the BNPs. Under optimum sensing condition, the use of SP-ICP-MS for BNPs assisted detection of Co 2+ improved the sensitivity of Co 2+ determination by 20-fold in comparison with the conventional spectrophotometric analysis.
Significance: The information obtained from SP-ICP-MS and FlFFF-ICP-MS can be combinedly used to understand sensing mechanism and to select the best condition for synthesis of BNPs used as sensor. This study illustrates the usefulness of SP-ICP-MS and FlFFF-ICP-MS in the nanoparticle-based sensor development research area.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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