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A Closed-Type Wireless Nanopore Electrode for Analyzing Single Nanoparticles

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Published on: March 20, 2019

RuCu Cage/Alloy Nanoparticles with Controllable Electroactivity for Specific Electroanalysis Applications.

Wangwang Zheng¹, Jie Yao¹, Yuan Zhao¹

¹Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, International Joint Research Center for Photoresponsive Molecules and Materials, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China.

Analytical Chemistry

|September 15, 2021

Summary

New RuCu nanostructures offer enhanced electrochemical sensing. These nanomaterials provide dual electro-oxidative signals for sensitive detection of sodium sulfide and xanthine, improving accuracy in electrochemical sensors.

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Last Updated: Oct 20, 2025

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Precise Electrochemical Sizing of Individual Electro-Inactive Particles

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Published on: August 4, 2023

Area of Science:

Electrochemistry
Nanomaterials Science
Analytical Chemistry

Background:

Electrochemical sensors face limitations in target monitoring and detection accuracy.
Developing nanotags with controllable and multiresponse electroactivity is crucial for sensor improvement.

Purpose of the Study:

To create novel Ruthenium-Copper (RuCu) nanostructures for enhanced electrochemical sensing.
To investigate the controllable fabrication and distinct electro-oxidative responses of RuCu cage and alloy nanoparticles (NPs).

Main Methods:

Fabrication of RuCu cage NPs and RuCu alloy NPs via a pH-controlled approach.
Characterization of nanoparticle structures and their unique electro-oxidative behaviors.
Application of RuCu NPs as electroactive tags for selective detection of sodium sulfide and xanthine.

Main Results:

RuCu cage NPs exhibited a single electro-oxidation peak at 0.84 V due to exposed Ru 0 electroactive sites.
RuCu alloy NPs displayed dual electro-oxidation peaks at 0.84 V (Ru 0 ) and -0.16 V (Cu + ).
Achieved sensitive detection with limits as low as 27 pM for Na 2 S and 70 nM for xanthine.

Conclusions:

The rational design of multimetal nanostructures enables multiresponse electroactivity.
RuCu nanostructures serve as effective electroactive tags for specific and accurate electrochemical sensing.
This approach holds significant potential for advancing electrochemical sensor capabilities.