Metallic nanoarray

Simple Approaches for Constructing Metallic Nanoarrays on a Solid Surface... 

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

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. 

Fig. 5.16 Procedure of solvent vapor-induced assembly for generating metallic nanoarrays. Reprinted with permission from [80]. Copyright (2010) by the Japan Society for Analytical Chemistry...

Fig. 5.18 Dark-field optical microscopy images of long metallic nanoarrays prepared with a DNA nanofibers as template, (a) Large-area image of metallic nanoarrays, (b) Enlarged image with 40x objective, (c) Enlarged image with lOOx objective. The drying front moved from right to left. Reprinted with permission from [109]. Copyright (2010) by the Japan Society for Anedytical Chemistry...

In this chapter we have presented our recent works on constructing metallic nanoarrays with a DNA template. Our methods first require DNA stretching and fixation on surfaces. We have demonstrated that surface coating with polymers containing... 

Phenaz-TMA/AuNPs on DNA and theLPR color changes involved. Furthermore, it was possible to create 2D patterns of metallic nanoarrays by the TP technique. Our methods summarized here do not require any special equipments, and should provide a useful system for investigating the electromagnetic (light) field localized between MNPs. 

Other recent materials created using these ordered arrays include porous nickel phosphide film for lithium ion batteries, porous aluminum films for lithium electrodeposition, macroporous silicon films for optics, cobalt metal nanoarrays of various morphologies for biomedicine," macro-/ nanoporous gold films for electrocatalysis, " silver bowls as SERS substrates, and complex macroporous gold and polypyrrole films. ... 

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