| 纳米吸湿性串联差分迁移率分析仪的建立与性能评估 |
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| 引用本文： | 李彪,周家成,刘芊芊,胡长进,赵卫雄,刘强,张为俊.纳米吸湿性串联差分迁移率分析仪的建立与性能评估[J].环境科学学报,2019,39(9):2903-2910. |
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| 作者姓名： | 李彪 周家成 刘芊芊 胡长进 赵卫雄 刘强 张为俊 |
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| 作者单位： | 中国科学院安徽光学精密机械研究所大气物理化学实验室,合肥230031;中国科学技术大学研究生院,合肥230026;中国科学院安徽光学精密机械研究所大气物理化学实验室,合肥230031;中国科学技术大学环境科学与光电技术学院,合肥230026;中国科学技术大学研究生院,合肥230026;中国科学院安徽光学精密机械研究所大气光学重点实验室,合肥230031;中国科学院安徽光学精密机械研究所大气物理化学实验室,合肥230031;中国科学技术大学研究生院,合肥230026;中国科学技术大学环境科学与光电技术学院,合肥230026 |
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| 基金项目： | 国家重点研发计划（No.2017YFC0209506，2017YFC0209401）；国家自然科学基金（No.41575126，U1532143） |
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| 摘 要： | 对新生态细粒子(粒径≤30 nm)的吸湿性测量是了解其物化特性,进而深入认识其生成机制及其环境与气候效应的重要手段之一.然而,目前无论是实验室研究还是外场观测都缺乏相应的仪器设备.本文基于商用纳米差分迁移率分析仪(Nano-DMA),设计搭建了一套纳米吸湿性串联差分迁移率分析仪(Nano-HTDMA),开展了系列性能测试,并结合理论模型对该系统进行了评估.对于粒径小于30 nm的纳米气溶胶颗粒的初步测试表明,该装置在室温条件下,加湿范围在相对湿度(RH)20%～90%之间可控,波动范围为±0.5%;并测量了(20±2) nm聚苯乙烯乳胶(PSL)小球在85%相对湿度条件下的吸湿增长因子(g),获得该系统的校准因子为0.007.同时,针对20 nm的硫酸铵和氯化钠气溶胶粒子的吸湿增长进行了测量,与引入形状因子χ后的理论模型进行了分析与对比;并针对不同粒径(15、20、30 nm)的硫酸铵、氯化钠的吸湿增长开展了研究,讨论了粒径对纳米颗粒物g因子、潮解点(DRH)的影响.系列测试结果都表明,不同条件下的实验研究结果与理论模型值都呈现出较好的一致性,证明了该系统的可靠性、稳定性与适用性,有望用于新生态气溶胶粒子的实验室与场地物化特性研究.
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| 关 键 词： | nano-HTDMA 纳米颗粒物 g因子 形状因子 粒径效应 |
| 收稿时间： | 2019/2/1 0:00:00 |
| 修稿时间： | 2019/3/9 0:00:00 |
Design and characterization of a nano-hygroscopic tandem differential mobility analyzer (nano-HTDMA) |
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| LI Biao,ZHOU Jiacheng,LIU Qianqian,HU Changjin,ZHAO Weixiong,LIU Qiang and ZHANG Weijun.Design and characterization of a nano-hygroscopic tandem differential mobility analyzer (nano-HTDMA)[J].Acta Scientiae Circumstantiae,2019,39(9):2903-2910. |
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| Authors: | LI Biao ZHOU Jiacheng LIU Qianqian HU Changjin ZHAO Weixiong LIU Qiang and ZHANG Weijun |
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| Institution: | 1. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;2. Graduate School, University of Science and Technology of China, Hefei 230026,1. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;2. Graduate School, University of Science and Technology of China, Hefei 230026,1. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;2. School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026,1. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;2. Graduate School, University of Science and Technology of China, Hefei 230026,1. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;2. Graduate School, University of Science and Technology of China, Hefei 230026,1. Graduate School, University of Science and Technology of China, Hefei 230026;2. Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031 and 1. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031;2. Graduate School, University of Science and Technology of China, Hefei 230026;3. School of Environmental Science and Optoelectronic Technology, University of Science and Technology of China, Hefei 230026 |
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