Electrokinetic phenomena such as dielectrophoresis and electrothermal fluid flow are used to increase the rate of mass transfer of silver and platinum nanoparticles and improve their stochastic electrochemical detection. These phenomena are induced by applying a high frequency alternating current (ac) waveform between a counter electrode and a working disk microelectrode. By recording chronoamperograms at room temperature and various ac powers, it is shown that the ac heating leads to an increase in the collision frequency of studied nanoparticles with working electrode surface by a factor of ∼10-10 as well as the increase in the magnitude of the measured faradaic response. It is suggested that the developed methodology could be used in the future to improve the detection of ultralow concentrations of various important bioanalytes.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.analchem.7b02807 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
α-FeO and polypyrrole impregnated alginate/gelatin nanocatalysts for the reduction of azo dyes and persistent organic pollutants.
Int J Biol Macromol
December 2024
Materials Polymer Laboratory, Macromolecular Chemistry Department, Faculty of Chemistry, University of Sciences and Technology Houari Boumediene USTHB, B.P. 32 El-Alia, 16111 Algiers, Algeria.
Herein, we propose magnetic nanocomposites as a powerful new catalyst for organic pollutant reduction. Polypyrrole (PPy) was synthesized in situ within the semi-interpenetrating alginate (Alg)/gelatin (Ge) network in presence of α-FeO as encapsulating matrix and inorganic filler, respectively. The polymeric matrix can act as bifunctional agent such as a binder and stabilizer to improve nanocatalyst stability while preserving their catalytic/magnetic performances.
View Article and Find Full Text PDFEnhanced Visible Light Controlled Glucose Photo-Reforming Using a Composite WO/Ag/TiO Photoanode: Effect of Incorporated Plasmonic Ag Nanoparticles.
Nanomaterials (Basel)
December 2024
Centre of New Technologies, University of Warsaw, S. Banacha 2c, 02-097 Warsaw, Poland.
WO/Ag/TiO composite photoelectrodes were formed via the high-temperature calcination of a WO film, followed by the sputtering of a very thin silver film and deposition of an overlayer of commercial TiO nanoparticles. These synthetic photoanodes were characterized in view of the oxidation of a model organic compound glucose combined with the generation of hydrogen at a platinum cathode. During prolonged photoelectrolysis under simulated solar light, these photoanodes demonstrated high and stable photocurrents of ca.
View Article and Find Full Text PDFPLASMA TRACE ELEMENTS IN MANAGED HUMBOLDT PENGUINS () FROM A SINGLE ZOOLOGICAL COLLECTION IN GERMANY.
J Zoo Wildl Med
December 2024
Laboklin GmbH & Co KG, 97688 Bad Kissingen, Germany.
Only limited data on concentrations of trace elements in the blood of avian species have been published. This information can play an important role in the conservation of endangered species and their protection from environmental pollutants and can also be clinically relevant in managed individuals. Some elements are essential for the health of the animals in human care, but little is known about expected concentrations for some of these elements.
View Article and Find Full Text PDFSelf-reduction of gold@platinum bimetallic nanoparticles on TiCT MXene nanoribbons coupled with hydrogel and smartphone technology for colorimetric detection of silver ions.
Anal Methods
January 2025
School of the Environment and Safety Engineering, Collaborative Innovation Center of Technology and Material of Water Treatment, Jiangsu University, Zhenjiang, 212013, P. R. China.
In recent years, numerous colorimetric methods have been developed for the detection of silver ions (Ag), yet there remains a need for a simple, sensitive, real-time and quantitative sensing platform. Herein, TiCT MXene nanoribbons (TiCTNRs) were utilized as the carrier material, and gold@platinum (Au@Pt) bimetallic nanoparticles were decorated onto the TiCTNR surface, for the first time, a facile self-reduction method. The resulting Au@Pt-TiCTNR nanohybrid exhibited excellent catalytic activity, facilitating the oxidation of 3,3',5,5'-tetramethylbenzidine, a colorless substrate, to generate a blue product (oxTMB), displaying prominent peroxidase-like activity.
View Article and Find Full Text PDFAdvanced SnO Thin Films: Stability and Sensitivity in CO Detection.
Int J Mol Sci
November 2024
Department of Solid-State Chemistry, Saint Petersburg State University, Saint Petersburg 199034, Russia.
This paper presents the results of a study on the characteristics of semiconductor sensors based on thin SnO films modified with antimony, dysprosium, and silver impurities and dispersed double Pt/Pd catalysts deposited on the surface to detect carbon monoxide (CO). An original technology was developed, and ceramic targets were made from powders of Sn-Sb-O, Sn-Sb-Dy-O, and Sn-Sb-Dy-Ag-O systems synthesized by the sol-gel method. Films of complex composition were obtained by RF magnetron sputtering of the corresponding targets, followed by technological annealing at various temperatures.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!