The use of force modulation microscopy to investigate block copolymer morphology
- 72 Downloads
Force modulation microscopy (FMM) is used to characterize the external surface and internal fracture surface morphologies of three different block copolymer samples. A roll-cast poly(styrene-butadiene-styrene) triblock copolymer film, spin-coated poly(styrene-b-methyl methacrylate) thin films, and an ultrathin poly(styrene-b-hexyl isocyanate) rod-coil block copolymer film were investigated. For each sample, height and elasticity images were obtained for the same areas allowing direct comparison. The elasticity images obtained using force modulation microscopy were independent of surface roughness and found to exhibit better contrast and spatial resolution of the respective block copolymer domains than the height images. The lateral resolution of the elasticity images was sufficient to show microphase separated domains having length scales as small as about 10 nm. The poly(styrene-b-methyl methacrylate) samples demonstrate that FMM can even be successfully used to study block copolymers in which both blocks are glassy under the conditions of measurement.
KeywordsBlock Copolymer Isocyanate Triblock Copolymer Copolymer Film Fracture Surface Morphology
Unable to display preview. Download preview PDF.
- 1.E. L. THOMAS, in “The Encyclopedia of Polymer Science and Engineering”, Vol. 5, edited by J. I. Kroschwitz (John Wiley, New York, 1986) p. 644.Google Scholar
- 15.Digital Instruments, Inc. Nanoscope III Command Reference Manual, Version 3.0 (December 21, 1993) p. 35.Google Scholar
- 20.R. J. ALBALAK, unpublished work.Google Scholar