Dielectric barrier discharge(DBD) is widely investigated in order to obtain uniform low-temperature plasma.Many studies have proved that some barrier materials,especially electrets,can improve the uniformity of discha...Dielectric barrier discharge(DBD) is widely investigated in order to obtain uniform low-temperature plasma.Many studies have proved that some barrier materials,especially electrets,can improve the uniformity of discharge.It is regarded as an available way to get atmospheric pressure glow discharge(APGD).In this paper,discharge forms with 4 different barrier materials(alumina,quartz,PTFE and PET) are investigated,and the transition of discharge form depending on the air pressure are recorded to estimate the influence of barrier materials on discharge.By using electrets as barrier materials,homogeneous discharges can be obtained in a more wide pressure range.Under the same experimental conditions,discharges with electrets are more uniform or have larger uniform areas due to the storage and desorption of charges on the surface of electrets.The electrons deposited in the surface layer can be released on next half cycle when the polarity of the applied voltage changes,and provide a number of seed electrons,which makes the discharge more homogeneous.The capacitance and the permittivity of barrier materials have no effect on the discharge form directly.展开更多
生物传感器全球会议(The World Congress on Biosensors)由英国 Elsevier AdvancedTechnology主办,是专为来自工业界、学术界及政府的高级科学家而举办的,着重总结最新科技成果,促进未来发展,是此领域的重要会议.Biosensors and Bioelec...生物传感器全球会议(The World Congress on Biosensors)由英国 Elsevier AdvancedTechnology主办,是专为来自工业界、学术界及政府的高级科学家而举办的,着重总结最新科技成果,促进未来发展,是此领域的重要会议.Biosensors and Bioelectronics杂志将首次为最具创造力的表现设奖.生物传感器是跨学科的科学,着眼于保健、环境与农业、食品工业的传感需求.它融合了生物学与电子学,把有创新精神的技术人员集中在一起,并承担促进人道主义与开发商业潜能的双重责任.展开更多
基金Project Supported by National Natural Science Foundation of China(50537020,50507003)Specialized Research Fund for the Doc-toral Programof High Education of China(20050079006).
文摘Dielectric barrier discharge(DBD) is widely investigated in order to obtain uniform low-temperature plasma.Many studies have proved that some barrier materials,especially electrets,can improve the uniformity of discharge.It is regarded as an available way to get atmospheric pressure glow discharge(APGD).In this paper,discharge forms with 4 different barrier materials(alumina,quartz,PTFE and PET) are investigated,and the transition of discharge form depending on the air pressure are recorded to estimate the influence of barrier materials on discharge.By using electrets as barrier materials,homogeneous discharges can be obtained in a more wide pressure range.Under the same experimental conditions,discharges with electrets are more uniform or have larger uniform areas due to the storage and desorption of charges on the surface of electrets.The electrons deposited in the surface layer can be released on next half cycle when the polarity of the applied voltage changes,and provide a number of seed electrons,which makes the discharge more homogeneous.The capacitance and the permittivity of barrier materials have no effect on the discharge form directly.
文摘生物传感器全球会议(The World Congress on Biosensors)由英国 Elsevier AdvancedTechnology主办,是专为来自工业界、学术界及政府的高级科学家而举办的,着重总结最新科技成果,促进未来发展,是此领域的重要会议.Biosensors and Bioelectronics杂志将首次为最具创造力的表现设奖.生物传感器是跨学科的科学,着眼于保健、环境与农业、食品工业的传感需求.它融合了生物学与电子学,把有创新精神的技术人员集中在一起,并承担促进人道主义与开发商业潜能的双重责任.