Related Experiment Video
Updated: Jul 4, 2025
09:04
Foodborne Pathogen Screening Using Magneto-fluorescent Nanosensor: Rapid Detection of E. Coli O157:H7
Published on: September 17, 2017
7.7K
A Nanofilm-Based Fluorescent Sensor toward Highly Efficient Detection of Ethephon
Qianqian Liu1, Rongrong Huang1, Jiaqi Tang2
1Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi' an 710062, P. R. China.
Analytical Chemistry
|February 1, 2024
Summary
A new nanofilm-based fluorescence film sensor (FFS) enables rapid, on-site detection of ethephon (ETH) vapor. This sensor offers high sensitivity and minimal interference, promoting safer agricultural practices.
Area of Science:
- Materials Science
- Analytical Chemistry
- Environmental Science
Background:
- Ethephon (ETH) is extensively used in agriculture to enhance fruit ripening and quality.
- Improper application of ETH poses risks to human health and environmental safety.
- Effective on-site, real-time monitoring techniques for ETH are crucial for its safe utilization.
Purpose of the Study:
- To develop a novel nanofilm-based fluorescence film sensor (FFS) for efficient detection of ethephon (ETH) in the vapor phase.
- To achieve high sensitivity, rapid response, and minimal interference for on-site ETH monitoring.
- To explore the potential for visualization-based qualitative sensing of ETH.
Main Methods:
- Fabrication of a flexible, uniform, and photochemically stable nanofilm sensor at the humid air/DMSO interface.
- Utilized a specially designed fluorescent o-carborane derivative (CB-2CHO) and a cross-linker BTN.
- Investigated the sensing mechanism attributed to specific binding and high porosity of the nanofilm for efficient mass transfer.
Main Results:
- Achieved a low detection limit (<0.2 ppb) for ETH in the vapor phase.
- Demonstrated a rapid response time of less than 10 seconds with near-zero interference.
- Successfully realized visualization-based qualitative sensing capabilities.
- The developed nanofilm exhibits desirable properties: flexibility, uniformity, tunable thickness, and photochemical stability.
Conclusions:
- The developed nanofilm-based fluorescence film sensor provides an effective solution for on-site and real-time ETH detection.
- This work addresses the critical need for safe monitoring of ETH in agricultural applications.
- The innovative approach to sensing film development opens new avenues for creating advanced fluorescence film sensors.
