Publication Title
Polymers
Document Type
Article
Abstract/Description
Fabrication of surfactant-modified DNA thin films with high uniformity, specifically DNA–CTMA, has been well considered via drop-casting and spin-coating techniques. However, the fabrication of thin films with pure DNA has not been sufficiently studied. We characterize the uniformity of thin films from aqueous salmon DNA solutions mixed with ethanol, methanol, isopropanol, and acetone. Measurements of thickness and macroscopic uniformity are made via a focused-beam ellipsometer. We discuss important parameters for optimum uniformity and note what the effects of solvent modifications are. We find that methanol- and ethanol-added solutions provide optimal fabrication methods, which more consistently produce high degrees of uniformity with film thickness ranging from 20 to 200 nm adjusted by DNA concentration and the physical parameters of spin-coating methods.
Department
Physics and Astronomy
First Page
1606
Last Page
1618
DOI
10.3390/polym13101606
Volume
13
ISSN
2073-4360
Date
5-16-2021
Citation Information
Richter, Jake; Nnaji, Moses; and Park, Heungman, "Solvent Effect to the Uniformity of Surfactant-Free Salmon-DNA Thin Films" (2021). Faculty Publications. 239.
https://digitalcommons.tamuc.edu/cose-faculty-publications/239
