Thin silica shell coated Ag assembled nanostructures for expandinggenerality of SERS analytes

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486220.do
DOI
10.1371/journal.pone.0178651
Title
Thin silica shell coated Ag assembled nanostructures for expandinggenerality of SERS analytes
Description
This work was supported by a grant (2016-A423-0045) of Bio & MedicalTechnology Development Program of the National Research Foundation (NRF)funded by the Korean government (MSIP & MOHW), and grant of the KoreanHealth Technology R&D Project, Ministry of Health & Welfare (HI17C1264);This work was supported by the Bio & Medical Technology DevelopmentProgram of the National Research Foundation (NRF) & funded by the Koreangovernment (MSIP & MOHW) (2016-A423-0045), Korean Health Technology R&DProject, Ministry of Health & Welfare (HI17C1264). The funders had norole in study design, data collection and analysis, decision to publish,or preparation of the manuscript.
abstract
Surface-enhanced Raman scattering (SERS) provides a unique non-destructive spectroscopic fingerprint for chemical detection. However, intrinsic differences in affinity of analyte molecules to metal surface hinder SERS as a universal quantitative detection tool for various analyte molecules simultaneously. This must be overcome while keeping close proximity of analyte molecules to the metal surface. Moreover, assembled metal nanoparticles (NPs) structures might be beneficial for sensitive and reliable detection of chemicals than single NP structures. For this purpose, here we introduce thin silica-coated and assembled Ag NPs (SiO2@Ag@SiO(2)NPs) for simultaneous and quantitative detection of chemicals that have different intrinsic affinities to silver metal. These SiO2@Ag@SiO(2)NPs could detect each SERS peak of aniline or 4-aminothiophenol (4-ATP) from the mixture with limits of detection (LOD) of 93 ppm and 54 ppb, respectively. E-field distribution based on interparticle distance was simulated using discrete dipole approximation (DDA) calculation to gain insight into enhanced scattering of these thin silica coated Ag NP assemblies. These NPs were successfully applied to detect aniline in river water and tap water. Results suggest that SiO2@Ag@SiO2 NP-based SERS detection systems can be used as a simple and universal detection tool for environment pollutants and food safety.
provenance
Made available in Cube on 2018-09-28T16:01:46Z (GMT). No. of bitstreams: 0
language
English
author
Cha, Myeong Geun
Kim, Hyung-Mo
Kang, Yoo-Lee
Lee, Minwoo
Kang, Homan
Kim, Jaehi
Pham, Xuan-Hung
Kim, Tae Han
Hahm, Eunil
Lee, Yoon-Sik
Jeong, Dae Hong
Jun, Bong-Hyun
orcid
Pham, Xuan-Hung/0000-0002-4927-7102
accessioned
2018-09-28T16:01:46Z
available
2018-09-28T16:01:46Z
issued
2017
citation
PLOS ONE(12): 6
issn
1932-6203
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486220.do
Funder
보건복지부
Funding Program
질환극복기술개발
Project ID
1465023508
Jurisdiction
Rep.of Korea
Project Name
Development detection platform based on nano-spectroscopy for precise PSA and proPSA simultaneous detection
rights
openAccess
type
article


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