Preparation and stabilization of monodisperse colloidal gold by reduction with aminodextran
Stable concentrated dispersions of monodisperse gold nanoparticles were synthesized by using diethylaminoethyl-dextran as reductant and stabilizer. Stable concentrated aqueous dispersions of monodisperse gold nanoparticles were prepared using diethylaminoethyl-dextran as reductant and stabilizer. Th...
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| Veröffentlicht in: | Journal of colloid and interface science 2009-07, Vol.335 (1), p.62-69 |
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| creator | Morrow, Benjamin J. Matijević, Egon Goia, Dan V. |
| description | Stable concentrated dispersions of monodisperse gold nanoparticles were synthesized by using diethylaminoethyl-dextran as reductant and stabilizer.
Stable concentrated aqueous dispersions of monodisperse gold nanoparticles were prepared using diethylaminoethyl-dextran as reductant and stabilizer. The effectiveness of dextran as reducing agent was strongly affected by the pH. In alkaline solutions, the Au(III) species were rapidly and completely reduced, yielding stable dispersions of spherical uniform gold nanoparticles. Their modal diameter could be adjusted from 18 to 40
nm by varying the pH, temperature, and the Au
3+/dextran ratio. In contrast, under acidic conditions (pH
∼
4.0) the reduction was very slow, favoring the formation of large gold crystals of other shapes. A general mechanism explaining the reducing and stabilizing actions of polysaccharides in general, and of diethylaminoethyl-dextran in particular, is proposed. |
| doi_str_mv | 10.1016/j.jcis.2009.02.053 |
| format | Article |
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Stable concentrated aqueous dispersions of monodisperse gold nanoparticles were prepared using diethylaminoethyl-dextran as reductant and stabilizer. The effectiveness of dextran as reducing agent was strongly affected by the pH. In alkaline solutions, the Au(III) species were rapidly and completely reduced, yielding stable dispersions of spherical uniform gold nanoparticles. Their modal diameter could be adjusted from 18 to 40
nm by varying the pH, temperature, and the Au
3+/dextran ratio. In contrast, under acidic conditions (pH
∼
4.0) the reduction was very slow, favoring the formation of large gold crystals of other shapes. A general mechanism explaining the reducing and stabilizing actions of polysaccharides in general, and of diethylaminoethyl-dextran in particular, is proposed.</description><identifier>ISSN: 0021-9797</identifier><identifier>EISSN: 1095-7103</identifier><identifier>DOI: 10.1016/j.jcis.2009.02.053</identifier><identifier>PMID: 19419734</identifier><identifier>CODEN: JCISA5</identifier><language>eng</language><publisher>Amsterdam: Elsevier Inc</publisher><subject>Aminodextran ; Chemistry ; Colloidal state and disperse state ; Colloids ; Crystals ; Dextrans ; Dispersions ; Exact sciences and technology ; General and physical chemistry ; Gold ; Gold sol ; Monodisperse gold ; Nanoparticles ; Physical and chemical studies. Granulometry. Electrokinetic phenomena ; Reduction ; Surface physical chemistry</subject><ispartof>Journal of colloid and interface science, 2009-07, Vol.335 (1), p.62-69</ispartof><rights>2009 Elsevier Inc.</rights><rights>2009 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c416t-dee78d3ef04c83c8d908815462d8c91bb60440e7f139d1f9341e672fdf3059233</citedby><cites>FETCH-LOGICAL-c416t-dee78d3ef04c83c8d908815462d8c91bb60440e7f139d1f9341e672fdf3059233</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jcis.2009.02.053$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>315,781,785,3551,27929,27930,46000</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=21533781$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19419734$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Morrow, Benjamin J.</creatorcontrib><creatorcontrib>Matijević, Egon</creatorcontrib><creatorcontrib>Goia, Dan V.</creatorcontrib><title>Preparation and stabilization of monodisperse colloidal gold by reduction with aminodextran</title><title>Journal of colloid and interface science</title><addtitle>J Colloid Interface Sci</addtitle><description>Stable concentrated dispersions of monodisperse gold nanoparticles were synthesized by using diethylaminoethyl-dextran as reductant and stabilizer.
Stable concentrated aqueous dispersions of monodisperse gold nanoparticles were prepared using diethylaminoethyl-dextran as reductant and stabilizer. The effectiveness of dextran as reducing agent was strongly affected by the pH. In alkaline solutions, the Au(III) species were rapidly and completely reduced, yielding stable dispersions of spherical uniform gold nanoparticles. Their modal diameter could be adjusted from 18 to 40
nm by varying the pH, temperature, and the Au
3+/dextran ratio. In contrast, under acidic conditions (pH
∼
4.0) the reduction was very slow, favoring the formation of large gold crystals of other shapes. A general mechanism explaining the reducing and stabilizing actions of polysaccharides in general, and of diethylaminoethyl-dextran in particular, is proposed.</description><subject>Aminodextran</subject><subject>Chemistry</subject><subject>Colloidal state and disperse state</subject><subject>Colloids</subject><subject>Crystals</subject><subject>Dextrans</subject><subject>Dispersions</subject><subject>Exact sciences and technology</subject><subject>General and physical chemistry</subject><subject>Gold</subject><subject>Gold sol</subject><subject>Monodisperse gold</subject><subject>Nanoparticles</subject><subject>Physical and chemical studies. Granulometry. Electrokinetic phenomena</subject><subject>Reduction</subject><subject>Surface physical chemistry</subject><issn>0021-9797</issn><issn>1095-7103</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNp9kE2LFDEQQIMo7uzoH_AgfVFP3VYl6Y-AF1l0FRb0oCcPIZ1UNEN3Z0x61PXXm3FGvO2poHj1KB5jTxAaBOxe7pqdDbnhAKoB3kAr7rENgmrrHkHcZxsAjrXqVX_BLnPeASC2rXrILlBJVL2QG_blY6K9SWYNcanM4qq8mjFM4fdpE301xyW6kPeUMlU2TlMMzkzV1zi5arytErmD_cv-DOu3ysyh4PRrTWZ5xB54M2V6fJ5b9vntm09X7-qbD9fvr17f1FZit9aOqB-cIA_SDsIOTsEwYCs77garcBw7kBKo9yiUQ6-EROp67p0X0CouxJa9OHn3KX4_UF71HLKlaTILxUPWqsTqZDvIQj6_kyzaAXgps2X8BNoUc07k9T6F2aRbjaCP8fVOH-PrY3wNXJf45ejp2X4YZ3L_T861C_DsDJhszeRLo6PjH8exSPoBC_fqxFGp9iNQ0tkGWiy5kMiu2sVw1x9_AN89o1M</recordid><startdate>20090701</startdate><enddate>20090701</enddate><creator>Morrow, Benjamin J.</creator><creator>Matijević, Egon</creator><creator>Goia, Dan V.</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope></search><sort><creationdate>20090701</creationdate><title>Preparation and stabilization of monodisperse colloidal gold by reduction with aminodextran</title><author>Morrow, Benjamin J. ; Matijević, Egon ; Goia, Dan V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c416t-dee78d3ef04c83c8d908815462d8c91bb60440e7f139d1f9341e672fdf3059233</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Aminodextran</topic><topic>Chemistry</topic><topic>Colloidal state and disperse state</topic><topic>Colloids</topic><topic>Crystals</topic><topic>Dextrans</topic><topic>Dispersions</topic><topic>Exact sciences and technology</topic><topic>General and physical chemistry</topic><topic>Gold</topic><topic>Gold sol</topic><topic>Monodisperse gold</topic><topic>Nanoparticles</topic><topic>Physical and chemical studies. Granulometry. Electrokinetic phenomena</topic><topic>Reduction</topic><topic>Surface physical chemistry</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Morrow, Benjamin J.</creatorcontrib><creatorcontrib>Matijević, Egon</creatorcontrib><creatorcontrib>Goia, Dan V.</creatorcontrib><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of colloid and interface science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Morrow, Benjamin J.</au><au>Matijević, Egon</au><au>Goia, Dan V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation and stabilization of monodisperse colloidal gold by reduction with aminodextran</atitle><jtitle>Journal of colloid and interface science</jtitle><addtitle>J Colloid Interface Sci</addtitle><date>2009-07-01</date><risdate>2009</risdate><volume>335</volume><issue>1</issue><spage>62</spage><epage>69</epage><pages>62-69</pages><issn>0021-9797</issn><eissn>1095-7103</eissn><coden>JCISA5</coden><abstract>Stable concentrated dispersions of monodisperse gold nanoparticles were synthesized by using diethylaminoethyl-dextran as reductant and stabilizer.
Stable concentrated aqueous dispersions of monodisperse gold nanoparticles were prepared using diethylaminoethyl-dextran as reductant and stabilizer. The effectiveness of dextran as reducing agent was strongly affected by the pH. In alkaline solutions, the Au(III) species were rapidly and completely reduced, yielding stable dispersions of spherical uniform gold nanoparticles. Their modal diameter could be adjusted from 18 to 40
nm by varying the pH, temperature, and the Au
3+/dextran ratio. In contrast, under acidic conditions (pH
∼
4.0) the reduction was very slow, favoring the formation of large gold crystals of other shapes. A general mechanism explaining the reducing and stabilizing actions of polysaccharides in general, and of diethylaminoethyl-dextran in particular, is proposed.</abstract><cop>Amsterdam</cop><pub>Elsevier Inc</pub><pmid>19419734</pmid><doi>10.1016/j.jcis.2009.02.053</doi><tpages>8</tpages></addata></record> |
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| subjects | Aminodextran Chemistry Colloidal state and disperse state Colloids Crystals Dextrans Dispersions Exact sciences and technology General and physical chemistry Gold Gold sol Monodisperse gold Nanoparticles Physical and chemical studies. Granulometry. Electrokinetic phenomena Reduction Surface physical chemistry |
| title | Preparation and stabilization of monodisperse colloidal gold by reduction with aminodextran |
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