Thermally tunable catalytic and optical properties of gold-hydrogel nanocomposites
We have developed a very simple approach for preparing physically embedded gold cores in a temperature-responsive hydrogel polymer nanoparticle under fluorescent light irradiation. The complete encapsulation of the multiple gold core nanoparticles is confirmed by the catalytic reduction of 4-nitroph...
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| Veröffentlicht in: | Nanotechnology 2012-07, Vol.23 (27), p.275606-275606 |
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| container_end_page | 275606 |
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| container_issue | 27 |
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| container_title | Nanotechnology |
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| creator | Kim, Jun-Hyun Boote, Brett W Pham, Julie A Hu, Jiayun Byun, Hongsik |
| description | We have developed a very simple approach for preparing physically embedded gold cores in a temperature-responsive hydrogel polymer nanoparticle under fluorescent light irradiation. The complete encapsulation of the multiple gold core nanoparticles is confirmed by the catalytic reduction of 4-nitrophenol, whose reactivity is significantly retarded above the lower critical solution temperature (LSCT) due to the deswelled polymer structure; its increased hydrophobicity slows the access of hydrophilic reactants to the cores. Since these gold cores are physically embedded in the polymer nanoparticles, further growth of the cores is reliably achieved in situ under light irradiation. Interestingly, the resulting composite nanoparticles exhibit reversible solution color changes as well as absorption bands from the visible to near-IR regions below and above the LSCT. |
| doi_str_mv | 10.1088/0957-4484/23/27/275606 |
| format | Article |
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Interestingly, the resulting composite nanoparticles exhibit reversible solution color changes as well as absorption bands from the visible to near-IR regions below and above the LSCT.</description><identifier>ISSN: 0957-4484</identifier><identifier>EISSN: 1361-6528</identifier><identifier>DOI: 10.1088/0957-4484/23/27/275606</identifier><identifier>PMID: 22710608</identifier><identifier>CODEN: NNOTER</identifier><language>eng</language><publisher>England: IOP Publishing</publisher><subject>Catalysis ; Catalysts ; Colorimetry - methods ; Encapsulation ; Gold ; Gold - chemistry ; Hot Temperature ; Hydrogels - chemistry ; Light irradiation ; Macromolecular Substances - chemistry ; Materials Testing ; Molecular Conformation ; Nanocomposites ; Nanoparticles ; Nanostructure ; Nanostructures - chemistry ; Nanostructures - ultrastructure ; Particle Size ; Refractometry ; Surface Properties ; Thermography - methods</subject><ispartof>Nanotechnology, 2012-07, Vol.23 (27), p.275606-275606</ispartof><rights>2012 IOP Publishing Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c387t-16abe66a45eeee8be0669e705c93daa2a9d2021c8fd5f1955741076474b67f6c3</citedby><cites>FETCH-LOGICAL-c387t-16abe66a45eeee8be0669e705c93daa2a9d2021c8fd5f1955741076474b67f6c3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/0957-4484/23/27/275606/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>315,781,785,27929,27930,53851,53898</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/22710608$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Kim, Jun-Hyun</creatorcontrib><creatorcontrib>Boote, Brett W</creatorcontrib><creatorcontrib>Pham, Julie A</creatorcontrib><creatorcontrib>Hu, Jiayun</creatorcontrib><creatorcontrib>Byun, Hongsik</creatorcontrib><title>Thermally tunable catalytic and optical properties of gold-hydrogel nanocomposites</title><title>Nanotechnology</title><addtitle>Nano</addtitle><addtitle>Nanotechnology</addtitle><description>We have developed a very simple approach for preparing physically embedded gold cores in a temperature-responsive hydrogel polymer nanoparticle under fluorescent light irradiation. The complete encapsulation of the multiple gold core nanoparticles is confirmed by the catalytic reduction of 4-nitrophenol, whose reactivity is significantly retarded above the lower critical solution temperature (LSCT) due to the deswelled polymer structure; its increased hydrophobicity slows the access of hydrophilic reactants to the cores. Since these gold cores are physically embedded in the polymer nanoparticles, further growth of the cores is reliably achieved in situ under light irradiation. Interestingly, the resulting composite nanoparticles exhibit reversible solution color changes as well as absorption bands from the visible to near-IR regions below and above the LSCT.</description><subject>Catalysis</subject><subject>Catalysts</subject><subject>Colorimetry - methods</subject><subject>Encapsulation</subject><subject>Gold</subject><subject>Gold - chemistry</subject><subject>Hot Temperature</subject><subject>Hydrogels - chemistry</subject><subject>Light irradiation</subject><subject>Macromolecular Substances - chemistry</subject><subject>Materials Testing</subject><subject>Molecular Conformation</subject><subject>Nanocomposites</subject><subject>Nanoparticles</subject><subject>Nanostructure</subject><subject>Nanostructures - chemistry</subject><subject>Nanostructures - ultrastructure</subject><subject>Particle Size</subject><subject>Refractometry</subject><subject>Surface Properties</subject><subject>Thermography - methods</subject><issn>0957-4484</issn><issn>1361-6528</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkF1LwzAUhoMobk7_wuilN3VJ2nz0UoZfMBBkXoc0Pd060qYm7cX-vRmd3moIJBfP-57Dg9CS4AeCpVzhgok0z2W-otmKingZx_wCzUnGScoZlZdo_gvN0E0IB4wJkZRcoxmlgmCO5Rx9bPfgW23tMRnGTpcWEqMHbY9DYxLdVYnr40_bpPeuBz80EBJXJztnq3R_rLzbgU063Tnj2t6FZoBwi65qbQPcnd8F-nx-2q5f0837y9v6cZOaTIohJVyXwLnOGcQjS8CcFyAwM0VWaU11UVFMiZF1xWpSMCZyggXPRV5yUXOTLdD91BtX-xohDKptggFrdQduDCp6opRQjLN_oBFkUmISUT6hxrsQPNSq902r_TFCp0qpTlbVyaqimaJCTepjcHmeMZYtVL-xH9cRoBPQuF4d3Oi7aOev1m-oM44h</recordid><startdate>20120711</startdate><enddate>20120711</enddate><creator>Kim, Jun-Hyun</creator><creator>Boote, Brett W</creator><creator>Pham, Julie A</creator><creator>Hu, Jiayun</creator><creator>Byun, Hongsik</creator><general>IOP Publishing</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20120711</creationdate><title>Thermally tunable catalytic and optical properties of gold-hydrogel nanocomposites</title><author>Kim, Jun-Hyun ; Boote, Brett W ; Pham, Julie A ; Hu, Jiayun ; Byun, Hongsik</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c387t-16abe66a45eeee8be0669e705c93daa2a9d2021c8fd5f1955741076474b67f6c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Catalysis</topic><topic>Catalysts</topic><topic>Colorimetry - methods</topic><topic>Encapsulation</topic><topic>Gold</topic><topic>Gold - chemistry</topic><topic>Hot Temperature</topic><topic>Hydrogels - chemistry</topic><topic>Light irradiation</topic><topic>Macromolecular Substances - chemistry</topic><topic>Materials Testing</topic><topic>Molecular Conformation</topic><topic>Nanocomposites</topic><topic>Nanoparticles</topic><topic>Nanostructure</topic><topic>Nanostructures - chemistry</topic><topic>Nanostructures - ultrastructure</topic><topic>Particle Size</topic><topic>Refractometry</topic><topic>Surface Properties</topic><topic>Thermography - methods</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kim, Jun-Hyun</creatorcontrib><creatorcontrib>Boote, Brett W</creatorcontrib><creatorcontrib>Pham, Julie A</creatorcontrib><creatorcontrib>Hu, Jiayun</creatorcontrib><creatorcontrib>Byun, Hongsik</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Nanotechnology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kim, Jun-Hyun</au><au>Boote, Brett W</au><au>Pham, Julie A</au><au>Hu, Jiayun</au><au>Byun, Hongsik</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermally tunable catalytic and optical properties of gold-hydrogel nanocomposites</atitle><jtitle>Nanotechnology</jtitle><stitle>Nano</stitle><addtitle>Nanotechnology</addtitle><date>2012-07-11</date><risdate>2012</risdate><volume>23</volume><issue>27</issue><spage>275606</spage><epage>275606</epage><pages>275606-275606</pages><issn>0957-4484</issn><eissn>1361-6528</eissn><coden>NNOTER</coden><abstract>We have developed a very simple approach for preparing physically embedded gold cores in a temperature-responsive hydrogel polymer nanoparticle under fluorescent light irradiation. The complete encapsulation of the multiple gold core nanoparticles is confirmed by the catalytic reduction of 4-nitrophenol, whose reactivity is significantly retarded above the lower critical solution temperature (LSCT) due to the deswelled polymer structure; its increased hydrophobicity slows the access of hydrophilic reactants to the cores. Since these gold cores are physically embedded in the polymer nanoparticles, further growth of the cores is reliably achieved in situ under light irradiation. Interestingly, the resulting composite nanoparticles exhibit reversible solution color changes as well as absorption bands from the visible to near-IR regions below and above the LSCT.</abstract><cop>England</cop><pub>IOP Publishing</pub><pmid>22710608</pmid><doi>10.1088/0957-4484/23/27/275606</doi><tpages>7</tpages></addata></record> |
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| ispartof | Nanotechnology, 2012-07, Vol.23 (27), p.275606-275606 |
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| source | MEDLINE; IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Catalysis Catalysts Colorimetry - methods Encapsulation Gold Gold - chemistry Hot Temperature Hydrogels - chemistry Light irradiation Macromolecular Substances - chemistry Materials Testing Molecular Conformation Nanocomposites Nanoparticles Nanostructure Nanostructures - chemistry Nanostructures - ultrastructure Particle Size Refractometry Surface Properties Thermography - methods |
| title | Thermally tunable catalytic and optical properties of gold-hydrogel nanocomposites |
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