Polymer self-assembly presents an attractive means of creating the micro- and nano-patterned spatial arrays required for many opto-electronic and coatings technologies. Two of these ordering processes are microphase separation (MS), exhibited by block copolymers, and crystallization, common in many polymer species. In this work, we present optical micrographs of block copolymer MS morphology and thin-film polymer crystallites having sub-diffraction-limit resolution ( 100nm) as afforded by Near-Field Scanning Optical Microscopy (NSOM). Images obtained via transmission aperture NSOM and polarization-modulated (PM) NSOM, which yields the local dichroism and birefringence, will be discussed. These images provide insights into the structure and local optical properties of these specimens, resolved at the level of single microphase domains and defects.
Citation: Microscopy and Analysis
Volume: Quebec City
Pub Type: Journals
block copolymer, NSOM, photonic, polarimetry, SNOM