Figure 2: Total elastic strain in rubrene single crystals.
From: Strain effects on the work function of an organic semiconductor

(a) Average total elastic strains ɛtotal of rubrene along a, b and c axes as a function of temperature for crystals laminated on PDMS, which are different from the corresponding thermal strains ɛthermal expected for free rubrene crystals (dashed lines). (b) Average ɛtotal of rubrene along a, b and c axes as a function of temperature for crystals laminated on Si, different from the corresponding ɛthermal predicted for free rubrene crystals (dashed lines). The error bars in ɛtotal were based on the s.d. calculated as demonstrated in Supplementary Table 2. (c) Illustration of strain components for rubrene on PDMS. (d) Illustration of strain components for rubrene on Si.