Real-Time Observation of Water-Soluble Mineral Precipitation in Aqueous Solution by In Situ High-Resolution Electron Microscopy

被引：44
作者：
Yuk, Jong Min [1 ,4 ,6 ]
Zhou, Qin [1 ,4 ,6 ]
Chang, Jiyoung [1 ,4 ,6 ]
Ercius, Peter [5 ]
Alivisatos, A. Paul [2 ,3 ,4 ,6 ]
Zettl, Alex [1 ,4 ,6 ]
机构：
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA
[3] Univ Calif Berkeley, Dept Mat Sci, Berkeley, CA 94720 USA
[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mat Sci Div, Berkeley, CA 94720 USA
[5] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Natl Ctr Electron Microscopy, Mol Foundry, Berkeley, CA 94720 USA
[6] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Kavli Energy NanoSci Inst, Berkeley, CA 94720 USA
来源：
ACS NANO | 2016年 / 10卷 / 01期
基金：
美国国家科学基金会;
关键词：
in situ graphene liquid cell electron microscopy; water-soluble mineral; nucleation and growth; grain boundary migration; grain rotation; PLATINUM NANOCRYSTAL GROWTH; GRAPHENE LIQUID CELLS; CALCITE GROWTH; CARBONATE NUCLEATION; KINETICS; RECRYSTALLIZATION; SANDWICHES; PERSULFATE; EVOLUTION; SULFATE;
D O I：
10.1021/acsnano.5b04064
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The precipitation and dissolution of water-soluble minerals in aqueous systems is a familiar process occurring commonly in nature. Understanding mineral nucleation and growth during its precipitation is highly desirable, but past in situ techniques have suffered from limited spatial and temporal resolution. Here, by using in situ graphene liquid cell electron microscopy, mineral nucleation and growth processes are demonstrated in high spatial and temporal resolution. We precipitate the mineral thenardite (Na2SO4) from aqueous solution with electron-beam-induced radiolysis of water. We demonstrate that minerals nucleate with a two-dimensional island structure on the graphene surfaces. We further reveal that mineral grains grow by grain boundary migration and grain rotation. Our findings provide a direct observation of the dynamics of crystal growth from ionic solutions.
引用
收藏
页码：88 / 92
页数：5
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