A simple and effective strategy for the directed and high-yield assembly of large-sized gold nanoparticles driven by bithiol-modified complementary dsDNA architectures

Abstract

A simple and effective strategy for the directed and high-yield assembly of large-sized Au NPs has been demonstrated by bithiol-modified complementary dsDNA architectures. The dsDNA architectures were formed by mixing two complementary thiol-modified ssDNA (only 36 bases) and played an important role in the high-yield self-assembly of the large-sized Au NPs. Compared with traditional methods, this strategy was simple, effective, low-cost and enabled excellent self-assembly of large-sized Au NPs, while obviating the need for the conjugate of Au NPs to ssDNA and the use of long chain DNA. Therefore, this straightforward and high efficiency methodology opens a new avenue of DNA-induced self-assembly of large-sized metal NPs.