Nanoscale chemical imaging of PS-b-PMMA Block Copolyer by Infrared Scanning Near-field Optical Microscopy
발표자
()
초록
내용
Correlating the morphology and spatial chemical distribution of nanostructures of block copolymers (BCP) remains a challenge for the polymer science society. Conventional imaging techniques, atomic force microscopy (AFM) and scanning electron microscopy (SEM), are able to provide the topographic information of BCPs, but could not guarantee the chemical distribution of each domain. A novel scanning probe microscopy combined with infrared (IR) laser called scattering-type scanning near-field optical microscopy (s-SNOM) can provide the spatial distribution of chemicals, including the identification of individual components by using the specific IR wavenumbers which corresponding to absorption bands of different chemical species with tens of nanometric resolution. Here we introduce the nanoscale chemical imaging result of PS-b-PMMA BCP with a new powerful analytical method, s-SNOM.