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Development and investigation of multi-layered homo- and hetero-type DNA thin films

Abstract

DNA molecules have been studied for specific target applications because of their characteristics and modification abilities. Although the fabrication of 2D multi-layered DNA thin films has been demonstrated, limitations of their applications exist due to difficulties controlling the layer thickness and fabricating hetero-stacking structures. Here, multi-layered homo- and hetero-type DNA and cetyltrimethyl-ammonium chloride (CTMA)-modified DNA thin films are fabricated via spin-coating and their physical characteristics are investigated. The thickness and the multilayer stacking influenced by the solvents, concentration, and spin-speed of sample solution are also discussed. While DNA layers can be stacked either on a DNA or on a CTMA-modified DNA layer with resulting thicknesses of approximately 100 and 300 nm, respectively, the CTMA-modified DNA layer cannot be stacked on a CTMA-modified DNA layer because of its solubility in the solvent. The optical and mechanical characteristics of thin films indicate their dependency on film thickness. In addition, we fabricate the luminophore-embedded DNA and CTMA-DNA thin films with homo- and hetero-type layer stackings and measure absorbance and photoluminescence spectra to show feasibility in constructing functionalized multi-layered thin films. The homo- and hetero-type DNA layers and their revealed physical characteristics provide a platform for the construction of useful devices and sensors and a perspective for better understanding applications in coating, transparent electrodes, transistors, and drug delivery.

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Publication details

The article was received on 11 Dec 2017, accepted on 09 Apr 2018 and first published on 11 Apr 2018


Article type: Paper
DOI: 10.1039/C7TC05675C
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Development and investigation of multi-layered homo- and hetero-type DNA thin films

    V. Arasu, S. Jeon, J. Jeong and S. H. Park, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C7TC05675C

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