Abstract
The gold nanoparticles (Au NPs) are always recognized as vital and important for human life from the ancient era. But it is very difficult to synthesize the Au NPs in the oxidizing atmosphere for the intended purpose. The innovative flame reduction method utilizing the N, N-Dimethylformamide (DMF) as a solvent was successfully used for the synthesis of precious metal Au NPs. The synthesized Au NPs are bare, so they can be directly used without any further processing as catalyst materials. The Au NPs were synthesized by burning their salt in DMF as solvent and fuel using a simple lamp. The prepared nanoparticles were found readily dispersible in water and DMF giving stable sols. In this paper, we report the synthesis of bare metal nanoparticles using the flame reduction method for the first time. The prepared NPs were collected on the glass surface and used for routine characterization techniques viz., UV-Visible, XRD, HR-TEM and electron diffraction. The Au NPs were 15[Formula: see text]nm in size and showed characteristic absorption peak at 550[Formula: see text]nm. The characteristic peaks observed in XRD of synthesized nanoparticles demonstrated the cubic phase of Au NPs. The formation mechanism of the prepared nanoparticles in open-air flame synthesis has been discussed in detail in this paper.
Published Version
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