Abstract
The attachment of functional DNA to gold nanoparticles via polyadenine adsorption is a well-established technology. This approach was mainly viewed through the lens of changing the DNA charge in order to reduce the electrostatic barrier created by a similarly charged gold surface. However, altering the DNA charge results in the loss of its functionality. This work considers the adsorption process of polyadenines by force that artificially brings them closer to the surface. As a force source, we used the hybridization of a DNA strand carrying polyadenines with a complementary strand already attached to the surface. It was shown that the hybridization forces facilitated the adsorption of polyadenines. We believe that this approach is applicable in various areas where it is essential to preserve the functionality of DNA during conjugation with nanoparticles.
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