کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1373666 | 1500606 | 2016 | 8 صفحه PDF | دانلود رایگان |
• Sulfated chitosan efficiently interact with the surface of CTAB coated AuNRs.
• Sulfated chitosan produced well-dispersed individually wrapped CTAB/AuNRs.
• Gum arabic produced clusters of CTAB-coated AuNRs.
• The CTAB/AuNRs/polysaccharide interactions were investigated through FTIR.
Gold nanorods (AuNRs) are suitable for constructing self-assembled structures for the development of biosensing devices and are usually obtained in the presence of cetyltrimethylammonium bromide (CTAB). Here, a sulfated chitosan (ChiS) and gum arabic (GA) were employed to encapsulate CTAB/AuNRs with the purpose of studying the interactions of the polysaccharides with CTAB, which is cytotoxic and is responsible for the instability of nanoparticles in buffer solutions. The presence of a variety of functional groups such as the sulfate groups in ChiS and the carboxylic groups in GA, led to efficient interactions with CTAB/AuNRs as evidenced through UV–vis and FTIR spectroscopies. Electron microscopies (HR-SEM and TEM) revealed that nanoparticle clusters were formed in the GA-AuNRs sample, whereas individual AuNRs, surrounded by a dense layer of polysaccharides, were observed in the ChiS-AuNRs sample. Therefore, the presented work contributes to the understanding of the driving forces that control the surface interactions of the studied materials, providing useful information in the building-up of gold self-assembled nanostructures.
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Journal: Carbohydrate Polymers - Volume 152, 5 November 2016, Pages 479–486