adding COOH groups an a gold surface works for example with 3 mercaptopropionic acid.
Do you Need to functionalize it selectively on the inside of the hollow rod? How big are your rods? do you already have a method to produce your hollow gold rods?
Julian Opel thankyou for helping. actually i use this journal by abdollahi for synthesize hollow nanogold. then i have to functionalize it with -COOH in outer shells. is it possible to functionalized it after i got my hollow nanogold (after silica template been removed by HF)?
I only found journals of people who functionalized AuNP with COOH and haven't found one yet it hollow nanogold with COOH. does the structure of nanoparticles matters?