How can I functionalize Au np suspension with amino groups? I also want to drop N-Au nps onto carbon electrode surface. Is there anyone to help me?
As Jaime said, thiols form self-assembled monolayers on gold surfaces and allow for adjusting the surface properties of NPs. Especially aromatic thiols form dense layers on gold surfaces and there are several examples of amino-terminated aromatic thiols in the literature. See for example:
Article Amino-terminated biphenylthiol self-assembled monolayers as ...
Functionlazation with self-assembled monolayers is a very common approach. Article Tuning adhesion forces between functionalized gold colloidal...
Depending on the approach You use, the packing density of the resulting functional layer can be modified to have more or less amino groups.
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