Journal
ADVANCED SCIENCE
Volume 7, Issue 6, Pages -Publisher
WILEY
DOI: 10.1002/advs.201902616
Keywords
cost-efficient plasma jet arrays; discharge stability; material processing; non-self-sustained DC discharge; V-I characteristic modulation
Categories
Funding
- National Natural Science Foundation of China [51877210, 61475191, 61875228]
- Open Research Fund of Key Laboratory of Spectral Imaging Technology, Chinese Academy of Sciences [LSIT201807G]
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Developing cost-efficient large-scale uniform plasma jets represents a significant challenge for high performance in material processing and plasma medicine. Here, a V-I characteristic modulation approach is proposed to reduce the discharge power and increase the plasma scale and chemical activity in non-self-sustained atmospheric direct-current discharges. The electric field in discharge space is optimized to fundamentally empower simultaneously initiating all discharge cells far below Townsend breakdown potential and stably sustaining each plasma jet at low voltage. These strategies create a crucial step to fabricating a flexible and compact low-power large-scale uniform laminar plasma jet array (LPJA) with high activity in cheap argon. The mechanisms behind the discharge enhancement are revealed by combining V-I characteristic examination and a modulation model. Compared with conventional arrays, this LPJA possesses the widest size (90 mm) and raises its uniformity from 30% to 97%. Comparing different discharge modes shows that the LPJA scale is surprisingly increased nearly by 4 times with the discharge power reduced from 7.4 to 4.8 W. The methodology provides a highly cost-efficient roadmap to break through the bottleneck of restricting low-power discharge, large-gap discharge, large-scale discharge, parallel-multi-electrode discharge, and uniform discharge together. This advance will meet the urgent need for various plasma applications.
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