Jin Seok Lee
Sookmyung Women’s University, South Korea
Title: Sequentially self-limited molecular layer deposition of uniformly aligned polyurea thin films
Biography
Biography: Jin Seok Lee
Abstract
Development of methods enabling the preparation of uniformly aligned polymer thin films at the molecular level is a prerequisite for realizing their optoelectronic characteristics as innovative materials; however, these methods often involve a compromise between scalability and accuracy. In this study, we have grown uniformly aligned polyurea thin films on a SiO2 substrate using molecular layer deposition (MLD) based on sequential and self-limiting surface reactions. By integrating plane-polarized Fourier-transform infrared, Raman spectroscopic tools and density functional theory (DFT) calculations, we demonstrated the uniform alignment of polyurea MLD films. Furthermore, the selective-wavelength absorption characteristics of these films were investigated by integrating optical measurements and finite-difference time-domain (FDTD) simulations of reflection spectra, resulting from their thickness-dependent fine resonance with photons.