文献类型：期刊文献

英文题名：Monitoring nanobubble nucleation at early-stage within a sub-9 nm solid-state nanopore

作者：Li, Qiao[1];Ying, Yi-Lun[1,2];Hu, Yong-Xu[1];Liu, Shao-Chuang[1];Long, Yi-Tao[2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai, Peoples R China;[2]Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Analyt Chem Life Sci, Nanjing, Jiangsu, Peoples R China

年份：2020

卷号：41

期号：10-11

起止页码：959

外文期刊名：ELECTROPHORESIS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000494556200001)】；

基金：This research was supported by the National Natural Science Foundation of China (21834001, 21922405). Dr. Yi-Lun Ying is sponsored by National Ten Thousand Talent Program for Young Top-Notch Talent.

语种：英文

外文关键词：Concentration; Nanobubble nucleation; Solid-state nanopore

摘要：Nanobubble nucleation study is important for understanding the dynamic behavior of nanobubble growth, which is instructive for the nanobubble applications. Benefiting from nanopore fabrication, herein, we fabricated a sub-9 nm SiNX nanopore with the comparable size to nanobubbles at early-stage. The confined nanopore interface serves as a generator for producing nanobubbles by the chemical reaction between NaBH4 and H2O and as an ultra-sensitive sensor for monitoring the H-2 nanobubble nucleation process. By carrying out the NaBH4 concentration-dependent experiments, we found the life-time of nanobubbles decreased 250 times and the frequency of nanobubble generation increased 38 times with the NaBH4 concentration increasing from 6 to 100 mM. The long-time equilibrium between gas molecules inward flux and outward flux could prolong the life-time of nanobubbles to hundreds of milliseconds at low NaBH4 concentration. The raw current trace depicted that the transient accumulation and dissolution of cavity occurred during all the life-time of nanobubbles. Therefore, the sub-9 nm SiNX nanopore shows a strong ability for real-time monitoring the nanobubble nucleation at early-stage with high temporal and spatial resolution. This work provides a guide to study the dynamic and stochastic characteristics of nanobubbles.