What are the ranges and basis of auxeticity in the phases of cellulose microfibrils?

One sample of 1D bundle of cellulose microfibrils in the form of lignified flax fibre (0.10526 mm x 10 mm), and one 2D networks of cellulose microfibrils in the form of tunicate cellulose (0.07 mm x 5 mm x 10 mm), bacterial cellulose (0.135 mm x 5 mm x 10 mm) and microfibrillated cellulose (0.08 mm x 5 mm x 10 mm) were put on a glass slide parallel to the principal spectrometer axis. Raman spectra were measured all round in-plane under both half (in 5° steps) polarisation from 0° to 360° in extended mode between 100 cm^-1 and 1150 cm^-1 in 3 accumulations at 10s exposure and 100% laser power. The cursor was placed at the peak of the 1095 cm^-1 band, and intensity read.