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Simple Synthesis of Clay-Gold Nanocomposites with Tunable Color
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap, teknik och matematik.ORCID-id: 0000-0003-2873-7875
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap, teknik och matematik.ORCID-id: 0000-0001-9137-3440
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för naturvetenskap, teknik och matematik.ORCID-id: 0000-0001-7329-3359
2010 (Engelska)Ingår i: Langmuir, ISSN 0743-7463, E-ISSN 1520-5827, Vol. 26, nr 8, s. 5823-5828Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Clay-based nanocomposites have been studied for several decades, mainly focusing on clay-polymer nanocomposites. Here, we report on a simple wet chemical method to synthesize clay-APTES-Au (CAAu) nanocomposites, where 3-aminopropyltriethoxysilane (APTES) acts as the linkage. The silane terminal of APTES formed bonds with the clay surface, while the other -NH(2) terminal bonds to gold nanoparticles. The color of clay changed when these CAAu nanocomposites were formed. By changing the size of the gold nanoparticles, the color of CAAu could be adjusted, simply by changing process parameters. TEM characterization of the synthesized nanocomposites showed an even distribution of gold nanoparticles on the clay surfaces. The nanocomposites were stable in strong acid and high concentration of salt conditions, while strong basic solution like NaOH could slightly influence the status of the gold nanoparticles due to the rupture of the Si-O-Si bonds between APTES and clay. To demonstrate the potential for label free sensing application of CAAu nanocomposites, we made hybrids of clay-APTES-Au-HD-Au (CAAuHAu), where hexamethylene diamine (HD) served as links between CAAu nanocomposites and the gold nanoparticles. The color of the composites changed from red to blue, when the hybrids were formed. Moreover, hemoglobin was loaded on the CAAu nanocomposites, which can potentially be used as a biosensor. These synthesized nanocomposites may combine the catalytic properties of clay and the well-known excellent properties of gold nanoparticles, such as the ability to anchor biological and chemical molecules. Furthermore, the color change of CAAu, when the CAAuHAu hybrids were observed, suggests the applications of these nanocomposites in biochemical and chemical sensing.

Ort, förlag, år, upplaga, sidor
2010. Vol. 26, nr 8, s. 5823-5828
Nyckelord [en]
DIRECT ELECTRON-TRANSFER; ONE-STEP SYNTHESIS; DIRECT ELECTROCHEMISTRY; POLYURETHANE/CLAY NANOCOMPOSITES; MELT INTERCALATION; NANOPARTICLES; HEMOGLOBIN; FILMS; POLYMERIZATION; DELAMINATION
Nationell ämneskategori
Naturvetenskap
Identifikatorer
URN: urn:nbn:se:miun:diva-11005DOI: 10.1021/la903747vISI: 000276562300069PubMedID: 20030319Scopus ID: 2-s2.0-77950956417OAI: oai:DiVA.org:miun-11005DiVA, id: diva2:285353
Tillgänglig från: 2010-01-11 Skapad: 2010-01-11 Senast uppdaterad: 2017-12-12Bibliografiskt granskad

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Zhang, RenyunHummelgård, MagnusOlin, Håkan

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