Why gold nanoparticles are attached to the glass vial and/or to the stir bar when reacting with EDC/Sulfo NHS?

I have functionalized 20 nm AuNPs with SH-PEG5k-COOH and SH-mPEG5k in a 9 :1 ratio. The final solution is around ~1 OD in DI water. To react with EDC/Sulfo NHS, I am using the following...

21 October 2021 5,854 5 View