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. Author manuscript; available in PMC: 2011 Jul 27.
Published in final edited form as: ACS Nano. 2010 Jul 27;4(7):3679–3688. doi: 10.1021/nn901796n

Scheme 1.

Scheme 1

An Au NP anchored with several low generation dendrimers through Au-amine coordination bonds. Addition of DNA/siRNA leads to an increase of local acidity, which protonates the tertiary amines, weakening the Au-amine interactions. As a result, the Au NPs are released from the dendrimers and are not included in the final DNA/siRNA nanoparticles.