Refractive Index of Single Surface Nanobubbles

被引：3

作者：

Zhou, Kai ^{[1
]}

Chang, Aosheng ^{[1
]}

Wang, Xue ^{[2
,3
]}

Jiang, Yingyan ^{[1
]}

Wang, Yongjie ^{[1
]}

Lu, Xinchao ^{[2
]}

Wang, Wei ^{[1
]}

机构：

[1] Nanjing Univ, Chem & Biomed Innovat Ctr ChemBIC, Sch Chem & Chem Engn, State Key Lab Analyt Chem Life Sci, Nanjing 210023, Peoples R China

[2] Chinese Acad Sci, Inst Microelect, Ehlth Ctr, Beijing 100029, Peoples R China

[3] Chinese Acad Sci, Inst High Energy Phys, Multidisciplinary Res Div, Beijing 100049, Peoples R China

来源：

CHEMICAL & BIOMEDICAL IMAGING | 2023年 / 1卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Surface nanobubbles; Refractive index; Condensedgas state; Surface plasmon resonance microscopy; PHOTOCATALYTIC ACTIVITY; NANOPARTICLES; GAS;

D O I：

10.1021/cbmi.3c00047

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Here, we report a label-free optical relative refractive index (RI) sensing technique based on the image contrast of surface plasmon resonance microscopy (SPRM). The positive or negative contrast of a SPRM pattern reflects the relative RI of a nanosized object to the medium. Through directly imaging the relative RI, we classified two kinds of surface nanobubbles generated by varied pathways. The former type of nanobubbles nucleated from local oversaturation of gas molecules had a RI lower than that of water and a transient lifetime. The second type of nanobubbles formed by a methanol-water exchange process had a RI higher than that of water and a long lifetime. The relative RI of surface nanobubbles indicated that the gas state is sparse for transient nanobubbles and compressed inside the stable nanobubbles.

引用

页码：387 / 394

页数：8

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