Parallel spectroscopic method for examining dynamic phenomena on the millisecond time scale.
An infrared spectroscopic technique based on planar array infrared (PAIR) spectroscopy has been developed that allows the acquisition of spectra from multiple samples simultaneously. Using this technique, it is possible to acquire spectra over a spectral range of 950-1900 cm(-1) with a temporal resolution of 2.2 ms. The performance of this system was demonstrated by determining the shear-induced orientational response of several low molecular weight liquid crystals. Five different liquid crystals were examined in combination with five different alignment layers, and both primary and secondary screens were demonstrated. Implementation of this high-throughput PAIR technique resulted in a reduction in acquisition time as compared to both step-scan and ultra-rapid-scanning FTIR spectroscopy.
Snively
Christopher M
CM
Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, USA. snively@udel.edu
Chase
D Bruce
DB
Rabolt
John F
JF
D050866:Liquid Crystals / Q000032:analysis* / Q000737:chemistry; D012212:Rheology; D033081:Shear Strength; D013055:Spectrophotometry, Infrared / Q000191:economics / Q000295:instrumentation* / Q000379:methods*; D013997:Time Factors