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Alignment of Vertically Standing Black Phosphorus Ribbons via Nanoskiving for Enhanced Gas Sensing Applications
Zihan Li1,2, Yongda Yan1,2, Yifei Xu2
1The State Key Laboratory of Robotics and Systems, Robotics Institute, Harbin Institute of Technology, Harbin, Heilongjiang, 150080, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|May 27, 2025
Summary
Researchers developed a high-yield method using nanoskiving to create black phosphorus (BP) ribbons for gas sensors. These sensors show improved sensitivity and faster response times for detecting gases like nitrogen dioxide (NO₂).
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Sensing
Background:
- Black phosphorus (BP) edge sites offer high adsorption and reactivity for gas sensing.
- Fabricating BP with fully exposed edge sites at high yields is challenging.
Purpose of the Study:
- To develop a scalable and efficient method for producing black phosphorus (BP) ribbons with exposed edge sites for gas sensing applications.
- To investigate the structural and electronic properties of these BP ribbons and their performance in gas sensors.
Main Methods:
- Utilized the nanoskiving technique to cut the basal plane of BP, creating vertically standing BP ribbons.
- Optimized cutting parameters through experimental adjustments and molecular dynamics simulations.
- Fabricated BP ribbon-based gas sensors and evaluated their performance.
- Conducted density functional theory (DFT) calculations to understand adsorption mechanisms.
- Developed a wireless gas sensing system for NO₂ detection.
Main Results:
- Achieved high-yield fabrication of precise BP ribbons with fully exposed edge sites.
- BP ribbon-based gas sensors demonstrated enhanced sensitivity and rapid response times (τads = 3.3 s, τdes = 14.1 s) compared to the basal plane.
- DFT calculations confirmed strong adsorption and abundant active sites contributing to sensor performance.
- Successfully demonstrated a wireless gas sensing system for detecting ppm-level NO₂.
Conclusions:
- The nanoskiving technique provides a scalable and efficient approach for fabricating high-performance BP ribbon-based gas sensors.
- Exposed edge sites significantly enhance gas adsorption and sensor performance.
- BP ribbon-based sensors show practical potential for real-world gas detection, including wireless NO₂ monitoring.
