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Control of Surface and Edge Oxidation on Phosphorene
Kaci L Kuntz1, Rebekah A Wells1, Jun Hu1
1Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States.
ACS Applied Materials & Interfaces
|February 21, 2017
Summary
Controlled oxidation of phosphorene, a 2D semiconductor, allows precise control over its surface chemistry. This study reveals how oxygen and water vapor selectively functionalize phosphorene surfaces, paving the way for new material applications.
Area of Science:
- Materials Science
- Surface Chemistry
- Nanotechnology
Background:
- Phosphorene, a 2D semiconductor, presents challenges in surface chemistry control.
- Understanding oxidation is key to functionalizing phosphorene.
Purpose of the Study:
- To investigate the controlled oxidation of phosphorene.
- To determine how oxidation affects composition and spatial distribution.
- To explore site-selective functionalization of 2D black phosphorus.
Main Methods:
- X-ray photoemission spectroscopy (XPS) to analyze oxidation states.
- Transmission electron microscopy (TEM) to visualize oxide distribution.
- Computational analysis of bonding configurations.
Main Results:
- Controlled oxidation yields specific phosphorus oxidation states (+1, +2, +3).
- Oxygen oxidizes the basal surface, while water targets defects like edges.
- Distinct oxidation mechanisms observed for oxygen and water vapor.
Conclusions:
- Site-selective oxidation enables targeted functionalization of phosphorene.
- This research opens avenues for synthesizing 2D phosphorene oxides.
- Understanding oxidation pathways is crucial for advanced 2D material applications.
