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DOI | 10.5194/acp-17-14025-2017 |
Electrospray surface-enhanced Raman spectroscopy (ES-SERS) for probing surface chemical compositions of atmospherically relevant particles | |
Gen, Masao; Chan, Chak K. | |
2017-11-24 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2017 |
卷号 | 17期号:22 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | We present electrospray surface-enhanced Raman spectroscopy (ES-SERS) as a new approach to measuring the surface chemical compositions of atmospherically relevant particles. The surface-sensitive SERS is realized by electrospraying Ag nanoparticle aerosols over analyte particles. Spectral features at v(SO42-), v(C H) and v(O H) modes were observed from the normal Raman and SERS measurements of laboratory-generated supermicron particles of ammonium sulfate (AS), AS mixed with succinic acid (AS / SA) and AS mixed with sucrose (AS / sucrose). SERS measurements showed strong interaction (or chemisorption) between Ag nanoparticles and surface aqueous sulfate, [SO42- [SO42-] with [SO42-]AS / sucrose > [SO42- JAS / SA > Lok-, JAS " Enhanced spectra of the solid AS and AS / SA particles revealed the formation of surface-adsorbed water on their surfaces at 60 % relative humidity. These observations of surface aqueous sulfate and adsorbed water demonstrate a possible role of surface-adsorbed water in facilitating the dissolution of sulfate from the bulk phase into its water layer(s). Submicron ambient aerosol particles collected in Hong Kong exhibited non-enhanced features of black carbon and enhanced features of sulfate and organic matter (carbonyl group), indicating an enrichment of sulfate and organic matter on the particle surface. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416151800003 |
WOS关键词 | LIQUID PHASE-SEPARATION ; SEA SPRAY AEROSOL ; AMMONIUM-SULFATE ; HYGROSCOPIC GROWTH ; SILVER ELECTRODE ; MIXED PARTICLES ; TAYLOR CONES ; WATER ; NANOPARTICLES ; SCATTERING |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28396 |
专题 | 地球科学 |
作者单位 | City Univ Hong Kong, Sch Energy & Environm, Tat Chee Ave, Kowloon, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Gen, Masao,Chan, Chak K.. Electrospray surface-enhanced Raman spectroscopy (ES-SERS) for probing surface chemical compositions of atmospherically relevant particles[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(22). |
APA | Gen, Masao,&Chan, Chak K..(2017).Electrospray surface-enhanced Raman spectroscopy (ES-SERS) for probing surface chemical compositions of atmospherically relevant particles.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(22). |
MLA | Gen, Masao,et al."Electrospray surface-enhanced Raman spectroscopy (ES-SERS) for probing surface chemical compositions of atmospherically relevant particles".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.22(2017). |
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