Nonphotochemical Laser-Induced Nucleation in Levitated Supersaturated Aqueous Potassium Chloride Microdroplets
Nonphotochemical Laser-Induced Nucleation in Levitated Supersaturated Aqueous Potassium Chloride Microdroplets
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DOI：
10.1021/cg5004319
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发表时间：
2014-05-01
影响因子：
3.8
通讯作者：
Garetz, Bruce A.
中科院分区：
文献类型：
--
作者：
Fang, Ke;Arnold, Stephen;Garetz, Bruce A.
我们已经观察到非光化学激光诱导成核（NPLIN）在悬浮的8 pL微滴的过饱和氯化钾水溶液照射纳秒脉冲的532 nm的光。与本体溶液的1.06的值相比，需要高得多的1.20的过饱和比S来观察微滴中的NPLIN，这归因于由于其小得多的体积，在S = 1.06时微滴中的成核速率低40百万倍。这一发现适用于高的空间和时间分辨率泵探测核在无容器的环境中的研究。
We have observed nonphotochemical laser-induced nucleation (NPLIN) in levitated 8 pL microdroplets of supersaturated aqueous potassium chloride irradiated with nanosecond pulses of 532 nm light. A much higher supersaturation ratio S of 1.20 was required to observe NPLIN in a microdroplet, compared to the value of 1.06 for bulk solutions, attributed to a 40-million-fold lower nucleation rate in a microdroplet at S = 1.06 as a result of its much smaller volume. This finding has application to high spatial and temporal resolution pump probe studies of nucleation in a containerless environment.