Zeta Potential Dependent Self-Assembly for Very Large Area Nanosphere Lithography.
basic_science · Level V
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- Record sourced from PubMed, PMID 32463243.
- Also identified by DOI 10.1021/acs.nanolett.0c01277.
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Abstract
Nanosphere lithography offers a rapid, low-cost approach for patterning of large-area two-dimensional periodic nanostructures. However, a complete understanding of the nanosphere self-assembly process is necessary to enable further development and scaling of this technology. The self-assembly of nanospheres into two-dimensional periodic arrays has previously been attributed solely to the Marangoni force; however, we demonstrate that the ζ potential of the nanosphere solution is critically important for successful self-assembly to occur. We discuss and demonstrate how this insight can be used to greatly increase self-assembled 2D periodic array areas while decreasing patterning time and cost. As a representative application, we fabricate antireflection nanostructures on a transparent flexible polymer substrate suitable for use as a large-area (270 cm<sup>2</sup>), broadband, omnidirectional antireflection film.