Triboelectric Devices for Power Generation and Self-Powered Sensing Applications by Lokesh Dhakar

Author:Lokesh Dhakar
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

(3.13)

As can be seen from Eq. ( 3.13 ), during the contact state, most of the deformation occurs in PDMS layer. This is due to high stiffness of SU-8 pillars as compared to the PDMS layer. This indicates that the contact area between SU-8 micropillars and PDMS layers is due to two factors: (i) primary contact area because of micropillar cross section and (ii) contact area resulting due to local elastic deformation of PDMS layer. Deformation of SU-8 micropillars can be neglected and does not contribute significantly to the contact area between two materials. Figure 3.6 shows the results using finite element method which was performed using COMSOL. The figure depicts the deformation in the PDMS layer. It can be observed that apart from top contact area between PDMS and micropillar, the contact area also increases at the micropillar edges due to local deformation.

Fig. 3.6Deformation observed in the PDMS layer using finite element method simulation

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