SiO2@Au Core–Shell Nanospheres Self-Assemble To Form Colloidal Crystals That Can Be Sintered and Surface Modified To Produce pH-Controlled Membranes
We prepared colloidal crystals by self-assembly of gold-coated silica nanospheres, and free-standing nanoporous membranes by sintering these colloidal crystals. We modified the nanopore surface with ionizable functional groups, by forming a monolayer of l-cysteine or by surface-initiated polymerizat...
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| Veröffentlicht in: | Langmuir 2013-03, Vol.29 (11), p.3749-3756 |
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| creator | Ignacio-de Leon, Patricia Anne A. Zharov, Ilya |
| description | We prepared colloidal crystals by self-assembly of gold-coated silica nanospheres, and free-standing nanoporous membranes by sintering these colloidal crystals. We modified the nanopore surface with ionizable functional groups, by forming a monolayer of l-cysteine or by surface-initiated polymerization of methacrylic acid. Diffusion experiments for the cationic dye Rhodamine B through l-cysteine-modified membranes showed a decrease in flux upon addition of an acid due to the nanopore surface becoming positively charged. Diffusion experiments for the neutral dye, ferrocenecarboxaldehyde, through the PMAA-modified membranes showed a 13-fold increase in flux upon addition of an acid resulting from the protonated polymer collapsing onto the nanopore surface leading to larger pore size. Our results demonstrate that SiO2@Au core–shell nanospheres can self-assemble into colloidal crystals and that transport through the corresponding surface-modified Au-coated colloidal membranes can be controlled by pH. |
| doi_str_mv | 10.1021/la304069x |
| format | Article |
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We modified the nanopore surface with ionizable functional groups, by forming a monolayer of l-cysteine or by surface-initiated polymerization of methacrylic acid. Diffusion experiments for the cationic dye Rhodamine B through l-cysteine-modified membranes showed a decrease in flux upon addition of an acid due to the nanopore surface becoming positively charged. Diffusion experiments for the neutral dye, ferrocenecarboxaldehyde, through the PMAA-modified membranes showed a 13-fold increase in flux upon addition of an acid resulting from the protonated polymer collapsing onto the nanopore surface leading to larger pore size. Our results demonstrate that SiO2@Au core–shell nanospheres can self-assemble into colloidal crystals and that transport through the corresponding surface-modified Au-coated colloidal membranes can be controlled by pH.</description><identifier>ISSN: 0743-7463</identifier><identifier>EISSN: 1520-5827</identifier><identifier>DOI: 10.1021/la304069x</identifier><identifier>PMID: 23398311</identifier><identifier>CODEN: LANGD5</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Acrylamides - chemistry ; Acrylic Resins ; Adsorption ; Chemistry ; Colloidal state and disperse state ; Colloids ; Cysteine - chemistry ; Exact sciences and technology ; General and physical chemistry ; Gold - chemistry ; Hydrogen-Ion Concentration ; Membranes ; Membranes, Artificial ; Metal Nanoparticles - chemistry ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Polyethylene Glycols - chemistry ; Polymers - chemistry ; Silicon Dioxide - chemistry ; Surface Properties</subject><ispartof>Langmuir, 2013-03, Vol.29 (11), p.3749-3756</ispartof><rights>Copyright © 2013 American Chemical Society</rights><rights>2014 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/la304069x$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/la304069x$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,780,784,27075,27923,27924,56737,56787</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=27178994$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/23398311$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ignacio-de Leon, Patricia Anne A.</creatorcontrib><creatorcontrib>Zharov, Ilya</creatorcontrib><title>SiO2@Au Core–Shell Nanospheres Self-Assemble To Form Colloidal Crystals That Can Be Sintered and Surface Modified To Produce pH-Controlled Membranes</title><title>Langmuir</title><addtitle>Langmuir</addtitle><description>We prepared colloidal crystals by self-assembly of gold-coated silica nanospheres, and free-standing nanoporous membranes by sintering these colloidal crystals. We modified the nanopore surface with ionizable functional groups, by forming a monolayer of l-cysteine or by surface-initiated polymerization of methacrylic acid. Diffusion experiments for the cationic dye Rhodamine B through l-cysteine-modified membranes showed a decrease in flux upon addition of an acid due to the nanopore surface becoming positively charged. Diffusion experiments for the neutral dye, ferrocenecarboxaldehyde, through the PMAA-modified membranes showed a 13-fold increase in flux upon addition of an acid resulting from the protonated polymer collapsing onto the nanopore surface leading to larger pore size. Our results demonstrate that SiO2@Au core–shell nanospheres can self-assemble into colloidal crystals and that transport through the corresponding surface-modified Au-coated colloidal membranes can be controlled by pH.</description><subject>Acrylamides - chemistry</subject><subject>Acrylic Resins</subject><subject>Adsorption</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Colloids</subject><subject>Cysteine - chemistry</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Gold - chemistry</subject><subject>Hydrogen-Ion Concentration</subject><subject>Membranes</subject><subject>Membranes, Artificial</subject><subject>Metal Nanoparticles - chemistry</subject><subject>Physical and chemical studies. Granulometry. Electrokinetic phenomena</subject><subject>Polyethylene Glycols - chemistry</subject><subject>Polymers - chemistry</subject><subject>Silicon Dioxide - chemistry</subject><subject>Surface Properties</subject><issn>0743-7463</issn><issn>1520-5827</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkc1KxDAQx4Moun4cfAHJRfBSTZq0TW6uxS9wXaHruUyblK2kzZq0oDffQfABfRIjrnoamPnNf-Y_g9AhJaeUxPTMACOcpPJlA01oEpMoEXG2iSYk4yzKeMp20K73T4QQybjcRjsxY1IwSifoo2jn8fl0xLl1-vPtvVhqY_A99Navltppjwttmmjqve4qo_HC4ivruoAbY1sFBufu1Q9gPF4sYcA59PhC46Lth9CtMPQKF6NroNZ4ZlXbtCEZRB6cVWPIrW6i3PaDC3KhMAtDHPTa76OtJmjqg3XcQ49Xl4v8JrqbX9_m07soOBZDlKRAAXiSShZXjAsJnJNEc66EAAm0qjWVOmkUgGI1CEUrlmWsSYmSSUo520MnP7orZ59H7Yeya30dThCWsKMvKaOCyJQmJKBHa3SsOq3KlWs7cK_l7y0DcLwGwNdgmmCkbv0_l9FMSMn_Oah9-WRH1weHJSXl9y_Lv1-yL_q9juY</recordid><startdate>20130319</startdate><enddate>20130319</enddate><creator>Ignacio-de Leon, Patricia Anne A.</creator><creator>Zharov, Ilya</creator><general>American Chemical Society</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7X8</scope></search><sort><creationdate>20130319</creationdate><title>SiO2@Au Core–Shell Nanospheres Self-Assemble To Form Colloidal Crystals That Can Be Sintered and Surface Modified To Produce pH-Controlled Membranes</title><author>Ignacio-de Leon, Patricia Anne A. ; Zharov, Ilya</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a308t-56a1aa456932b3489a4405e44d88a9a1bce19e5fdaad3ca8d1b3773f60d956143</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Acrylamides - chemistry</topic><topic>Acrylic Resins</topic><topic>Adsorption</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Colloids</topic><topic>Cysteine - chemistry</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Gold - chemistry</topic><topic>Hydrogen-Ion Concentration</topic><topic>Membranes</topic><topic>Membranes, Artificial</topic><topic>Metal Nanoparticles - chemistry</topic><topic>Physical and chemical studies. Granulometry. Electrokinetic phenomena</topic><topic>Polyethylene Glycols - chemistry</topic><topic>Polymers - chemistry</topic><topic>Silicon Dioxide - chemistry</topic><topic>Surface Properties</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ignacio-de Leon, Patricia Anne A.</creatorcontrib><creatorcontrib>Zharov, Ilya</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><jtitle>Langmuir</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ignacio-de Leon, Patricia Anne A.</au><au>Zharov, Ilya</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>SiO2@Au Core–Shell Nanospheres Self-Assemble To Form Colloidal Crystals That Can Be Sintered and Surface Modified To Produce pH-Controlled Membranes</atitle><jtitle>Langmuir</jtitle><addtitle>Langmuir</addtitle><date>2013-03-19</date><risdate>2013</risdate><volume>29</volume><issue>11</issue><spage>3749</spage><epage>3756</epage><pages>3749-3756</pages><issn>0743-7463</issn><eissn>1520-5827</eissn><coden>LANGD5</coden><abstract>We prepared colloidal crystals by self-assembly of gold-coated silica nanospheres, and free-standing nanoporous membranes by sintering these colloidal crystals. We modified the nanopore surface with ionizable functional groups, by forming a monolayer of l-cysteine or by surface-initiated polymerization of methacrylic acid. Diffusion experiments for the cationic dye Rhodamine B through l-cysteine-modified membranes showed a decrease in flux upon addition of an acid due to the nanopore surface becoming positively charged. Diffusion experiments for the neutral dye, ferrocenecarboxaldehyde, through the PMAA-modified membranes showed a 13-fold increase in flux upon addition of an acid resulting from the protonated polymer collapsing onto the nanopore surface leading to larger pore size. Our results demonstrate that SiO2@Au core–shell nanospheres can self-assemble into colloidal crystals and that transport through the corresponding surface-modified Au-coated colloidal membranes can be controlled by pH.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><pmid>23398311</pmid><doi>10.1021/la304069x</doi><tpages>8</tpages></addata></record> |
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| ispartof | Langmuir, 2013-03, Vol.29 (11), p.3749-3756 |
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| language | eng |
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| subjects | Acrylamides - chemistry Acrylic Resins Adsorption Chemistry Colloidal state and disperse state Colloids Cysteine - chemistry Exact sciences and technology General and physical chemistry Gold - chemistry Hydrogen-Ion Concentration Membranes Membranes, Artificial Metal Nanoparticles - chemistry Physical and chemical studies. Granulometry. Electrokinetic phenomena Polyethylene Glycols - chemistry Polymers - chemistry Silicon Dioxide - chemistry Surface Properties |
| title | SiO2@Au Core–Shell Nanospheres Self-Assemble To Form Colloidal Crystals That Can Be Sintered and Surface Modified To Produce pH-Controlled Membranes |
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