Fabrication and Patterning of Metallic Nanoarrays with Long-Range Order

4 Fabrication and Patterning of Metallic Nanoarrays with Long-Range Order 

1 Preparation of Longer Metallic Nanoarrays with DNA Nanofibers 

The formation process for long metallic nanoarrays with DNA nanofibers is illustrated in Fig. 5.16 [80, 109]. First, a mixture of Phenaz-TMA/AuNPs and A-DNA in a TE buffer (pH = 8) solution was added to 8 i,L of ethanol. This solution was then deposited on a PDMS sheet, which was tilted at 15° during solvent evaporation to move the drying front downwards. Solvent evaporation leads to a decrease in the volume of the solution, leaving behind line patterns. Line patterns of metallic nanoarrays were formed when DNA with AuNPs attached was continuously deposited at the highly concentrated finger positions. Metallic nanoarrays also exceed several hundred micrometers in length and can be made within 30 min. 

Metallic nanoarrays grow up toward the drying front. 

The drying front moves downward on tilted surface. 

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