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Control the drying configuration of suspensions via regulating the surface topologies for surface-enhanced Raman scattering optimization
Zhou, Bingpu1; Gao, Yibo2; Wu, Xiaoxiao3; Wen, Weijia2,3
2017-09-15
Source PublicationJOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
Volume502Pages:67-76
Abstract

In this work, the authors present an innovative method to efficiently control the drying configuration of gold nanoparticles (AuNPs) for optimization of surface-enhanced Raman scattering (SEAS) performance with improved sensitivity and re-producibility. Via repeated grafting-casting processes, we have simply regulated the surface topologies of polydimethylsiloxane (PDMS) with average surface roughness ranging from 1.4 nm to 651.3 nm. The assembling configurations of AuNPs after completed evaporation of solvent have been systematically studied on substrates with different roughness degrees. Furthermore, we found that based on the suspended droplet drying method, the inter-gaps among AuNPs can be well optimized on rougher substrate than on flat PDMS. The SERS spectra based on diverse substrates are investigated and compared, with the best available results arising from the roughest PDMS substrate accompanied by suspended drying means. By introducing rhodamine 6G as the probe molecule, such convenient method enables the detection limit down to 10(-1)4 mol/L with linear relationship between the Raman intensity and analyte concentrations within 10(-)8-10(-14) mol/L. The experimental results confirm the superiorities of our proposed method for preparation of SERS substrate, and thus providing a straightforward avenue for future construction of efficient and sensitive platform in fields from environmental monitoring to biological sensors. (C) 2017 Elsevier Inc. All rights reserved.

KeywordAu Nanoparticle Pdms Surface Enhanced Raman Scattering Surface Roughness
DOI10.1016/j.jcis.2017.04.090
URLView the original
Indexed BySCIE
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Physical
WOS IDWOS:000403383700009
PublisherACADEMIC PRESS INC ELSEVIER SCIENCE
The Source to ArticleWOS
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Cited Times [WOS]:7   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Affiliation1.Univ Macau, Inst Appl Phys & Mat Engn, Taipa, Macau, Peoples R China
2.Hong Kong Univ Sci & Technol, Sch Sci, Environm Sci Programs, Kowloon, Hong Kong, Peoples R China
3.Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China
First Author AffilicationUniversity of Macau
Recommended Citation
GB/T 7714
Zhou, Bingpu,Gao, Yibo,Wu, Xiaoxiao,et al. Control the drying configuration of suspensions via regulating the surface topologies for surface-enhanced Raman scattering optimization[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2017,502:67-76.
APA Zhou, Bingpu,Gao, Yibo,Wu, Xiaoxiao,&Wen, Weijia.(2017).Control the drying configuration of suspensions via regulating the surface topologies for surface-enhanced Raman scattering optimization.JOURNAL OF COLLOID AND INTERFACE SCIENCE,502,67-76.
MLA Zhou, Bingpu,et al."Control the drying configuration of suspensions via regulating the surface topologies for surface-enhanced Raman scattering optimization".JOURNAL OF COLLOID AND INTERFACE SCIENCE 502(2017):67-76.
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