True 3-D displays for avionics and mission crewstations
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
Poly(di-n-pentylsilane) has been previously reported to adopt a 7/3 helical conformation at room temperature. We have studied the solid state structure of a low molecular weight (Mw = 46 000) sample and its dependence on temperature using wide angle X-ray diffraction, differential scanning calorimetry, and Raman spectroscopy. The results suggest that domains of two distinct structures are present, one having an all-trans conformation and the other a 7/3 helical conformation. The all-trans conformation was observed (even at room temperature) in samples cooled previously to -15 °C. Characteristic resonance enhancement of certain Raman vibrations is observed for the planar zigzag polymorph. The all-trans material converts to the 7/3 helical structure at 35 °C and subsequently undergoes an order/disorder transformation at about 56 °C. © 1994, American Chemical Society. All rights reserved.
Elizabeth A. Sholler, Frederick M. Meyer, et al.
SPIE AeroSense 1997
Biancun Xie, Madhavan Swaminathan, et al.
EMC 2011
K.N. Tu
Materials Science and Engineering: A
Julian J. Hsieh
Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films