Au-Ag Core-Shell Nanospheres for Surface-Enhanced Raman Scattering Detection of Sudan I and Sudan II in Chili Powder
Au-Ag core-shell (Au@Ag) bimetallic nanospheres synthesized by a facile seed-growth method are proposed as a substrate for surface-enhanced Raman spectroscopy (SERS) to detect azo-group dyes including Sudan I and Sudan II. Au@Ag nanospheres with a series of particle sizes (diameter: 30–120 nm) and s...
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| Veröffentlicht in: | Journal of nanomaterials 2015-01, Vol.2015 (2015), p.1-8 |
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| creator | Huang, Yiqun Fan, Yuxia Yu, Wansong Ou, Yiming Pei, Lu Lai, Keqiang |
| description | Au-Ag core-shell (Au@Ag) bimetallic nanospheres synthesized by a facile seed-growth method are proposed as a substrate for surface-enhanced Raman spectroscopy (SERS) to detect azo-group dyes including Sudan I and Sudan II. Au@Ag nanospheres with a series of particle sizes (diameter: 30–120 nm) and silver shell thicknesses (6–51 nm) were synthesized and compared for their morphological and optical properties to obtain optimum enhancement effect. Normal Raman, SERS, infrared, and ultraviolet-visible were used to investigate the optical absorption properties of Sudan I and Sudan II as well as the enhancement mechanism of Au@Ag substrates. The nanospheres with particle size of 73 ± 6 nm in diameter and silver layer of 27 ± 2 nm resulted in the highest enhancement effect and could be used to detect Sudan I and Sudan II standard solutions at levels as low as 0.4 and 0.1 mg/L, respectively. Moreover, Sudan I and Sudan II in chili powder could be detected at 0.6 and 0.4 mg/kg, respectively. Sudan I and Sudan II with similar structures in complicated food matrices could be distinguished through applying principal component analysis, indicating good selectivity of the SERS method for detection of banned additives in food stuffs at trace levels. |
| doi_str_mv | 10.1155/2015/430925 |
| format | Article |
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Au@Ag nanospheres with a series of particle sizes (diameter: 30–120 nm) and silver shell thicknesses (6–51 nm) were synthesized and compared for their morphological and optical properties to obtain optimum enhancement effect. Normal Raman, SERS, infrared, and ultraviolet-visible were used to investigate the optical absorption properties of Sudan I and Sudan II as well as the enhancement mechanism of Au@Ag substrates. The nanospheres with particle size of 73 ± 6 nm in diameter and silver layer of 27 ± 2 nm resulted in the highest enhancement effect and could be used to detect Sudan I and Sudan II standard solutions at levels as low as 0.4 and 0.1 mg/L, respectively. Moreover, Sudan I and Sudan II in chili powder could be detected at 0.6 and 0.4 mg/kg, respectively. Sudan I and Sudan II with similar structures in complicated food matrices could be distinguished through applying principal component analysis, indicating good selectivity of the SERS method for detection of banned additives in food stuffs at trace levels.</description><identifier>ISSN: 1687-4110</identifier><identifier>EISSN: 1687-4129</identifier><identifier>DOI: 10.1155/2015/430925</identifier><language>eng</language><publisher>Cairo, Egypt: Hindawi Publishing Corporation</publisher><subject>Aqueous solutions ; Bans ; Chromatography ; Food ; Foods ; Infrared ; Methods ; Nanomaterials ; Nanospheres ; Optical properties ; Particle size ; Principal components analysis ; Raman scattering ; Raman spectroscopy ; Silver ; Spectrum analysis ; Studies</subject><ispartof>Journal of nanomaterials, 2015-01, Vol.2015 (2015), p.1-8</ispartof><rights>Copyright © 2015 Lu Pei et al.</rights><rights>Copyright © 2015 Lu Pei et al. Lu Pei et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c389t-f4591809291bd38ba9b37fe27dd31846300bdc7124aaf83f3f98dc17def11cc3</citedby><cites>FETCH-LOGICAL-c389t-f4591809291bd38ba9b37fe27dd31846300bdc7124aaf83f3f98dc17def11cc3</cites><orcidid>0000-0003-4204-9200 ; 0000-0002-8522-9300</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><contributor>Zhang, Renyun</contributor><creatorcontrib>Huang, Yiqun</creatorcontrib><creatorcontrib>Fan, Yuxia</creatorcontrib><creatorcontrib>Yu, Wansong</creatorcontrib><creatorcontrib>Ou, Yiming</creatorcontrib><creatorcontrib>Pei, Lu</creatorcontrib><creatorcontrib>Lai, Keqiang</creatorcontrib><title>Au-Ag Core-Shell Nanospheres for Surface-Enhanced Raman Scattering Detection of Sudan I and Sudan II in Chili Powder</title><title>Journal of nanomaterials</title><description>Au-Ag core-shell (Au@Ag) bimetallic nanospheres synthesized by a facile seed-growth method are proposed as a substrate for surface-enhanced Raman spectroscopy (SERS) to detect azo-group dyes including Sudan I and Sudan II. Au@Ag nanospheres with a series of particle sizes (diameter: 30–120 nm) and silver shell thicknesses (6–51 nm) were synthesized and compared for their morphological and optical properties to obtain optimum enhancement effect. Normal Raman, SERS, infrared, and ultraviolet-visible were used to investigate the optical absorption properties of Sudan I and Sudan II as well as the enhancement mechanism of Au@Ag substrates. The nanospheres with particle size of 73 ± 6 nm in diameter and silver layer of 27 ± 2 nm resulted in the highest enhancement effect and could be used to detect Sudan I and Sudan II standard solutions at levels as low as 0.4 and 0.1 mg/L, respectively. Moreover, Sudan I and Sudan II in chili powder could be detected at 0.6 and 0.4 mg/kg, respectively. Sudan I and Sudan II with similar structures in complicated food matrices could be distinguished through applying principal component analysis, indicating good selectivity of the SERS method for detection of banned additives in food stuffs at trace levels.</description><subject>Aqueous solutions</subject><subject>Bans</subject><subject>Chromatography</subject><subject>Food</subject><subject>Foods</subject><subject>Infrared</subject><subject>Methods</subject><subject>Nanomaterials</subject><subject>Nanospheres</subject><subject>Optical properties</subject><subject>Particle size</subject><subject>Principal components analysis</subject><subject>Raman scattering</subject><subject>Raman spectroscopy</subject><subject>Silver</subject><subject>Spectrum analysis</subject><subject>Studies</subject><issn>1687-4110</issn><issn>1687-4129</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><sourceid>RHX</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqF0U1LAzEQBuBFFNTqybsEvIiyNrPZrxxL_SqIiu19SZOJG2mTmuwi_nsjqyJePM3APAwzvElyBPQCoCjGGYVinDPKs2Ir2YOyrtIcMr790wPdTfZDeKE0L3iR7SXdpE8nz2TqPKbzFlcrci-sC5sWPQainSfz3mshMb2yrbASFXkSa2HJXIquQ2_sM7nEDmVnnCVOR67idEaEVd_9jBhLpq1ZGfLo3hT6g2RHi1XAw686ShbXV4vpbXr3cDObTu5SyWrepTreCHV8hsNSsXop-JJVGrNKKQZ1XjJKl0pWkOVC6JpppnmtJFQKNYCUbJScDms33r32GLpmbYKMPwqLrg8NVFBzVlWsjPTkD31xvbfxuKhoVmZAAaI6H5T0LgSPutl4sxb-vQHafAbQfAbQDAFEfTbo1lgl3sw_-HjAGAlq8QuXnELJPgB0NYzr</recordid><startdate>20150101</startdate><enddate>20150101</enddate><creator>Huang, Yiqun</creator><creator>Fan, Yuxia</creator><creator>Yu, Wansong</creator><creator>Ou, Yiming</creator><creator>Pei, Lu</creator><creator>Lai, Keqiang</creator><general>Hindawi Publishing Corporation</general><general>Hindawi Limited</general><scope>ADJCN</scope><scope>AHFXO</scope><scope>RHU</scope><scope>RHW</scope><scope>RHX</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>CWDGH</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>JG9</scope><scope>KB.</scope><scope>L7M</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>F28</scope><scope>FR3</scope><orcidid>https://orcid.org/0000-0003-4204-9200</orcidid><orcidid>https://orcid.org/0000-0002-8522-9300</orcidid></search><sort><creationdate>20150101</creationdate><title>Au-Ag Core-Shell Nanospheres for Surface-Enhanced Raman Scattering Detection of Sudan I and Sudan II in Chili Powder</title><author>Huang, Yiqun ; Fan, Yuxia ; Yu, Wansong ; Ou, Yiming ; Pei, Lu ; Lai, Keqiang</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c389t-f4591809291bd38ba9b37fe27dd31846300bdc7124aaf83f3f98dc17def11cc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Aqueous solutions</topic><topic>Bans</topic><topic>Chromatography</topic><topic>Food</topic><topic>Foods</topic><topic>Infrared</topic><topic>Methods</topic><topic>Nanomaterials</topic><topic>Nanospheres</topic><topic>Optical properties</topic><topic>Particle size</topic><topic>Principal components analysis</topic><topic>Raman scattering</topic><topic>Raman spectroscopy</topic><topic>Silver</topic><topic>Spectrum analysis</topic><topic>Studies</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Huang, Yiqun</creatorcontrib><creatorcontrib>Fan, Yuxia</creatorcontrib><creatorcontrib>Yu, Wansong</creatorcontrib><creatorcontrib>Ou, Yiming</creatorcontrib><creatorcontrib>Pei, Lu</creatorcontrib><creatorcontrib>Lai, Keqiang</creatorcontrib><collection>الدوريات العلمية والإحصائية - e-Marefa Academic and Statistical Periodicals</collection><collection>معرفة - المحتوى العربي الأكاديمي المتكامل - e-Marefa Academic Complete</collection><collection>Hindawi Publishing Complete</collection><collection>Hindawi Publishing Subscription Journals</collection><collection>Hindawi Publishing Open Access</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>Middle East & Africa Database</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Research Database</collection><collection>Materials Science Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Materials Science Collection</collection><collection>Access via ProQuest (Open Access)</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><jtitle>Journal of nanomaterials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Huang, Yiqun</au><au>Fan, Yuxia</au><au>Yu, Wansong</au><au>Ou, Yiming</au><au>Pei, Lu</au><au>Lai, Keqiang</au><au>Zhang, Renyun</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Au-Ag Core-Shell Nanospheres for Surface-Enhanced Raman Scattering Detection of Sudan I and Sudan II in Chili Powder</atitle><jtitle>Journal of nanomaterials</jtitle><date>2015-01-01</date><risdate>2015</risdate><volume>2015</volume><issue>2015</issue><spage>1</spage><epage>8</epage><pages>1-8</pages><issn>1687-4110</issn><eissn>1687-4129</eissn><abstract>Au-Ag core-shell (Au@Ag) bimetallic nanospheres synthesized by a facile seed-growth method are proposed as a substrate for surface-enhanced Raman spectroscopy (SERS) to detect azo-group dyes including Sudan I and Sudan II. Au@Ag nanospheres with a series of particle sizes (diameter: 30–120 nm) and silver shell thicknesses (6–51 nm) were synthesized and compared for their morphological and optical properties to obtain optimum enhancement effect. Normal Raman, SERS, infrared, and ultraviolet-visible were used to investigate the optical absorption properties of Sudan I and Sudan II as well as the enhancement mechanism of Au@Ag substrates. The nanospheres with particle size of 73 ± 6 nm in diameter and silver layer of 27 ± 2 nm resulted in the highest enhancement effect and could be used to detect Sudan I and Sudan II standard solutions at levels as low as 0.4 and 0.1 mg/L, respectively. Moreover, Sudan I and Sudan II in chili powder could be detected at 0.6 and 0.4 mg/kg, respectively. Sudan I and Sudan II with similar structures in complicated food matrices could be distinguished through applying principal component analysis, indicating good selectivity of the SERS method for detection of banned additives in food stuffs at trace levels.</abstract><cop>Cairo, Egypt</cop><pub>Hindawi Publishing Corporation</pub><doi>10.1155/2015/430925</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0003-4204-9200</orcidid><orcidid>https://orcid.org/0000-0002-8522-9300</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Aqueous solutions Bans Chromatography Food Foods Infrared Methods Nanomaterials Nanospheres Optical properties Particle size Principal components analysis Raman scattering Raman spectroscopy Silver Spectrum analysis Studies |
| title | Au-Ag Core-Shell Nanospheres for Surface-Enhanced Raman Scattering Detection of Sudan I and Sudan II in Chili Powder |
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