I have prepared an oxide of different structures (e.g. nanocubes, nanobelt, rods, etc.) using different preparation techniques. I want to modify the surface of these materials with silanes. The rate of uptake differs with each structure. Could this variation be due to the different type of surface hydroxyls on the surface of the different structure? if not, what could be the reason?
Hi,
You haven't mentioned what kind of silanes are you planning to trying? Various organic groups have various reactivity with hydroxyl groups. Overall size and nature of this organic groups shows different reactivity with hydroxide groups which are on surface or any where. It is also partially related to type of hydroxyls as well. hope this is helpful.
every nanostructure has its own surface to volume ratio.even by varying the size of nanomaterial this ratio differs.by changing in surface to volume ratio, the OH groups on surface change.as a result the rate of uptake differs. I hope that I have understood your question correctly.
The answer to your question is; sure it does. There is no need to say the production method itself will definitely alter the surface chemistry. Even you have amorphous products/particles with no crystallinity, you have to fix the after production procedure to be sure about the surface chemistry.
Addition to the former comments of our esteemed colleagues:
There are some good articles which clearly points that even different crystal planes has different chemical reactivity. Addition to that synthesis method and plus handling (purification, cleaning and etc.) after the production of the particles can change the surface chemistry.
Best Regards.
Kerem
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