Ghasemi, Marjan Jeong, Hayoung Kim, Donggyu Kim, Byungjoo Jang, Joon Ik Oh, Kyunghwan 2024-01-19T12:32:19Z 2024-01-19T12:32:19Z 2022-04-03 2022-03 2046-2069 https://pubs.kist.re.kr/handle/201004/115578 We successfully obtained transfer ribonucleic acid (tRNA) thin solid films (TSFs) using an aqueous solution precursor in an optimized deposition process. By varying the concentration of RNA and deposition process parameters, uniform solid layers of solid RNA with a thickness of 30 to 46 nm were fabricated consistently. Linear absorptions of RNA TSFs on quartz substrates were experimentally investigated in a wide spectral range covering UV-VIS-NIR to find high transparency for lambda > 350 nm. We analyzed the linear refractive indices, n(lambda) of tRNA TSFs on silicon substrates by using an ellipsometer in the 400 to 900 nm spectral range to find a linear correlation with the tRNA concentration in the aqueous solution. The thermo-optic coefficient (dn/dT) of the films was also measured to be in a range -4.21 x 10(-4) to -5.81 x 10(-4) degrees C-1 at 40 to 90 degrees C. We furthermore characterized nonlinear refractive index and nonlinear absorption of tRNA TSFs on quartz using a Z-scan method with a femtosecond laser at lambda = 795 nm, which showed high potential as an efficient nonlinear optical material in the IR spectral range. English Royal Society of Chemistry Linear and nonlinear optical properties of transfer ribonucleic acid (tRNA) thin solid films Article 10.1039/d1ra09412b 1 RSC Advances, v.12, no.14, pp.8661 - 8667 RSC Advances 12 14 8661 8667 Y scie scopus 000770379500001 Chemistry, Multidisciplinary Chemistry Article THERMOOPTICAL PROPERTIES 2ND-HARMONIC GENERATION DEOXYRIBONUCLEIC-ACID REFRACTIVE-INDEX DNA-CTMA DISPERSION BASES