Fully Vacuum-Sealed Diode-Structure Addressable ZnO Nanowire Cold Cathode Flat-Panel X-ray Source: Fabrication and
Chengyun Wang1, Guofu Zhang1, Yuan Xu2
1State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510275, China.
Nanomaterials (Basel, Switzerland)
|November 27, 2021
Summary
Researchers developed a vacuum-sealed flat-panel X-ray source using zinc oxide (ZnO) nanowire field emitter arrays (FEAs). This addressable X-ray device enables localized emission for advanced imaging applications.
Area of Science:
- Materials Science
- Physics
- Engineering
Background:
- Field emitter arrays (FEAs) are crucial for developing advanced X-ray sources.
- Zinc oxide (ZnO) nanowires offer promising properties for cold cathode applications.
- Flat-panel X-ray sources require precise control over X-ray emission.
Purpose of the Study:
- To fabricate a fully vacuum-sealed, addressable flat-panel X-ray source.
- To utilize ZnO nanowire FEAs as the cold cathode.
- To demonstrate localized X-ray emission and its application in imaging.
Main Methods:
- Fabrication of a diode-structure X-ray source with ZnO nanowire FEAs on the cathode and molybdenum (Mo) on the anode.
- Implementation of cross-addressing of cathode and anode electrodes for localized X-ray emission.
- Characterization of the radiation dose rate and X-ray imaging performance.
Main Results:
- Successful fabrication of a vacuum-sealed, addressable flat-panel X-ray source.
- Achieved a radiation dose rate of 10.8 μGy/s at 32 kV anode voltage.
- Obtained X-ray images of objects using different addressing schemes, demonstrating imaging feasibility.
Conclusions:
- The developed ZnO nanowire FEA-based diode structure is a viable approach for addressable flat-panel X-ray sources.
- Localized X-ray emission is achievable through cross-addressing.
- The technology shows potential for advanced X-ray imaging applications.
