Passive bending modulus

Figure 27.2 Plot of the passive bending modulus k against the fluorescence intensity (as a measure of the BR concentration in the membrane).

Figure 27.4 Qualitative illustration of the effect of BR activation plot of the passive bending modulus k and the corresponding active effective bending modulus as a function of the fluorescence intensity (proportional to the BR concentration in the membrane) for seven vesicles. For the pure lipid vesicle (non-fluorescent), the two circles are almost superimposed.

In the micropipet technique, a pressure difference is created between the inside and the outside of a micropipet to create tension in the membrane and to pull out the excess area due to the shape fluctuations inside the micropipet. In the low-tension regime [16,18], for a passive membrane, the slope of the logarithm of the tension a versus the areal strain a is proportional to the bending modulus k of the membrane,... 

The deterioration of the electrical performances in the SiNx-passivated TFT under mechanical stress was more severe than that in the acryl-passivated TFT. Under an outward bending, the bending momentum elongates the TFT-films in the upper part of TFT on a metal substrate and compresses the flexible metal substrate in the lower part. Neutral plane is free from any stress between the elongated and the compressed part. The Young s modulus of acrylic polymer (3.2 GPa) is lower than that of SiNx film (183 GPa). As the 3 jmq-thick acrylic polymer was employed as the passivation layer in place of 0.3 jMn-thick SiNx film, a total thickness of TFT-films was increased. Therefore, the position of the neutral plane may shift from mid-surface toward the TFT-films. It accompanies with decrease of stress applied on the TFT-films. Hence, the acryl-passivated TFT could endure mechanical stress better than the SiNx-passivated TFT. 

---