Figure 1: Nanopatterning of graphene via metallized DNA structures that encode and transfer spatial information. | Nature Communications

Figure 1: Nanopatterning of graphene via metallized DNA structures that encode and transfer spatial information.

From: Metallized DNA nanolithography for encoding and transferring spatial information for graphene patterning

Figure 1

(a) The encoded single-stranded DNA building blocks were programmed to fold into complex nanoscale DNA templates in solution. (b) Specific DNA templates, that is, X- and ring-shapes, were formed by DNA origami or SST. (c) Nano-sized DNA templates with specific shapes were deposited onto pre-synthesized graphene sheets (lithography step 1). (d) Metallization of the DNA templates generated custom-shaped gold masks on graphene (lithography step 2). (e) RIE removed unprotected graphene, leaving only gold mask-covered regions on wafer (lithography step 3). (f) Specifically shaped graphene nanostructures, that is, graphene X-shapes and nanorings, were obtained after mask removal (lithography step 4). (g–k) Graphene nanorings and letter-shapes derived from metallized DNA templates, from top to bottom, ring-, L-, X-, Y- and Z-shaped nanostructures, respectively. Columns (i–v), from left to right: (i) motif designs of DNA templates, (ii) AFM images of the DNA templates immobilized on graphene, (iii) the metallized templates on graphene, (iv) the final etched graphene shapes and (v) typical height profiles of the structures in column ii (black), iii (red) and iv (blue). Scale bars, 100 nm (AFM lateral); 10 nm (height scales).

Back to article page