| 초록 |
Atomic Force Microscopy (AFM)and infrared(IR) spectroscopy have been combined in a single instrument capable of producing 100 nm spatial resolution IR spectra and absorption images. This new capability enables the spectroscopic characterization of microdomain-forming polymers at levels not previously possible. Films of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) were solution cast, followed by melting and annealing to generate crystalline microdomains. Short duration thermomechanical waves, due to infrared absorption and resulting thermal expansion, were studied by monitoring the resulting excitation of the AFM cantilever. Dramatic differences in IR spectra are observed in the 1200-1300 cm-1 range as a function of position. Two overlapping, carbonyl bands are observed near 1720 cm-1 in more crystalline regions of the polymer. |
