Study on metal nanoparticles synthesis and orientation of gemini surfactant molecules used as stabilizer

Amit Kumar Tiwari, Subhashis Gangopadhyay, Chien Hsiang Chang, Surojit Pande, Subit Kumar Saha

研究成果: Article同行評審

29 引文 斯高帕斯(Scopus)

摘要

In the present study, we report the synthesis of gold (Au), silver (Ag), and gold-silver alloy (Au-Ag) nanoparticles (NPs) by seed-mediated method using gemini surfactant, containing diethyl ether spacer group as a stabilizer. As-synthesized NPs are found very much stable and have been characterized using UV-vis spectroscopy, X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), and zeta potential techniques. The orientation of gemini surfactant molecules surrounding the metal NPs has been investigated exploiting twisted intramolecular charge transfer (TICT) fluorescence properties of a probe 4-(N,. N-dimethylamino) cinnamaldehyde (DMACA). The quenching efficiencies of different NPs have been performed in the fluorescence of DMACA and are found to be different. This effect can be related to the location of DMACA as well as the electro-negativity of the metals as the extent of orientation of the surfactant molecules around NPs controls the location of DMACA in a bilayer. To support the location of DMACA, fluorescence quenching studies with cetylpyridinium chloride (CPC) as an external quencher have also been carried out.

原文English
頁(從 - 到)76-83
頁數8
期刊Journal of Colloid And Interface Science
445
DOIs
出版狀態Published - 2015 5月 1

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 生物材料
  • 表面、塗料和薄膜
  • 膠體和表面化學

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