As we know the surface hydroxyl of the chemical formula is -OH. But how many kinds of surface hydroxyl are there? There are 3 types:

·adjacent hydroxyl

·Para hydroxyl

·Twin hydroxyl

You will see them in the picture below.

Generally speaking, the adjacent hydroxyl is the most important one among them.

Can we customized the surface hydroxyl?

No, so far, we can not control it, but we can treat them by some measures.

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