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Building superlattices from individual nanoparticles via template-confined DNA-mediated assembly
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Building superlattices from individual nanoparticles via template-confined DNA-mediated assembly
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Building superlattices from individual nanoparticles via template-confined DNA-mediated assembly
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Journal Article
Building superlattices from individual nanoparticles via template-confined DNA-mediated assembly
2018
Overview
A polymer pore template can control the order of assembly of nanoparticles into well-defined stacks and create superlattices. Lin et al. used DNA strands on gold nanoparticles to control interparticle distance. The DNA strands contained modified adenines with more rigid ribose groups that formed stronger base pairs. The height of the stacks of three different types of gold nanoparticle could be changed with different solvents, which in turn changed their optical response. Science , this issue p. 669 Locked DNA strands and micropores are used to assemble nanoparticles with different sizes and shapes into superlattices. DNA programmable assembly has been combined with top-down lithography to construct superlattices of discrete, reconfigurable nanoparticle architectures on a gold surface over large areas. Specifically, the assembly of individual colloidal plasmonic nanoparticles with different shapes and sizes is controlled by oligonucleotides containing “locked” nucleic acids and confined environments provided by polymer pores to yield oriented architectures that feature tunable arrangements and independently controllable distances at both nanometer- and micrometer-length scales. These structures, which would be difficult to construct by other common assembly methods, provide a platform to systematically study and control light-matter interactions in nanoparticle-based optical materials. The generality and potential of this approach are explored by identifying a broadband absorber with a solvent polarity response that allows dynamic tuning of visible light absorption.
