DNA-silica nanolattices as mechanical metamaterials

Mechanical metamaterials consist of intricate periodic structures made using additive manufacturing techniques. Yet, nanoscale (<10 nm) features cannot be directly printed using these fabrication techniques, although this is the size regime in which enhanced material properties appear. In addition, current additive manufacturing techniques cannot easily combine disparate materials (e.g., soft, biological polymers with hard ceramics) into structural motifs. Here, we show that DNA origami can be used to construct octahedral-based isotropic and anisotropic nanolattices. When coated with a thin silica layer, these nanolattices obtain strength and energy absorption competitive with the best additively manufactured nanolattices. The DNA nanolattices have strut 6 nm diameters and  ~50 nm unit cells, which are two orders of magnitude smaller than lithography-based lattices. The silica coating is as thin as ~1.65 nm, which results in enhanced strength. Atom probe tomography confirms the nanos..., , , # DNA-silica nanolattices as mechanical metamaterials

[https://doi.org/10.5061/dryad.g4f4qrfxz](https://doi.org/10.5061/dryad.g4f4qrfxz)

This folder contains all data needed to reproduce the results in the paper titled \"DNA-Silica Nanolattices as Mechanical Metamaterials\" by Kulikowski and Wang et al. in *Matter*.

Naming convention:

sample names start with the heading DNAC-###-###, where the first 3 digits correspond to sets of sample preparation conditions and the second 3 digits correspond to sample numbers within those conditions.

For example, DNAC-001-001 and DNAC-001-003 refer to the silica coating of 1.75nm but dispersed on 2 different silicon wafer pieces. The samples themselves should behave the same. DNAC-003-003 refers to a coating of 5.1nm on its 3rd iteration. This is NOT on the same silicon wafer piece as DNAC-001-003. Some files omit the last 3 digits.

Designations are as follows:

DNAC-001-###: 1.75nm coating thickness samples

DNAC-002-###: space filling coating s...