Key points are not available for this paper at this time.
Two methods have been developed to fabricate spheres with gold caps on selective areas so that the self-assembly of these spheres can be potentially carried out in a controlled fashion. The patterned spheres are further functionalized with self-assembled groups, such as DNAs, which allows the formation of the second gold cap on the same sphere.
Bao et al. (Tue,) studied this question.