Dear All
I have tried to synthesize Ag nanocube according to the polyol approach in the presence of HCl, published by Prof. Younan Xia group, "Large‐Scale Synthesis of Silver Nanocubes: The Role of HCl in Promoting Cube Perfection and Monodispersity, Angewandte Chemie , 2005, 29, 2154-2157 ".
However, the absorbance spectrum does not match with the reported in literature and TEM image shows mixture of different shapes.
The questions are:
1-Is there any special separation process? except washing step?
2- I used higher amount of HCl according the literature (J. Phys. Chem. C 2011, 115, 7979–7986); but it also did not work.
I wonder if anyone who has used this method helps me.
Best Regards
Mohammad
i think it is better you change method.
J Am Chem Soc. 2016 Mar 9;138(9):3161-7. doi: 10.1021/jacs.5b13163.
Dear Ramin Javahershenas
Thanks for the suggestion. However, this method gives small nanocubes while I need to tune the edge length between 30-100 nm.
Regards
Mohammad
I also had a lot of struggles with getting good shape control and avoiding aggregation when trying to synthesize Pt nanoparticles. I ended up using a microwave heating method, which gave highly crystalline nanocubes (however, they are smaller than your goal). I found that using a surfactant that binds preferentially to the {100} facet was the key to getting good nanocubes. I used oleylamine, although I think oleic acid and some other ligands like PVP may also be used. I am attaching my article on microwave synthesis, but I have also included a citation below that might be useful for larger Ag NPs. Hope this helps!
Here is the link to my method: Article Rapid microwave synthesis and optical activity of highly cry...
Here is the paper with larger Ag nanocubes:
Shape-Controlled Synthesis of Gold and Silver Nanoparticles
Yugang Sun and Younan Xia
Science 298, 2176 (2002);
DOI: 10.1126/science.1077229
Dear Clare Davis-Wheeler Chin
Many thanks for sharing your valuable experience. As you mentioned, I need a method to tune the size of Ag Nanocubes. I am trying different methods. hope one of them works !
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