Instability and dewetting of ultrathin solid viscoelastic films on homogeneous and heterogeneous substrates
- Patra, Ajoy
- Bandyopadhyay, Dipankar
- Tomar, Gaurav
- Sharma, Ashutosh
- Biswas, Gautam
DOIAbstract
Instability and dewetting engendered by the van der Waals force in soft thin (<100 nm) linear viscoelastic solid (e. g., elastomeric gel) films on uniform and patterned surfaces are explored. Linear stability analysis shows that, although the elasticity of the film controls the onset of instability and the corresponding critical wavelength, the dominant length-scale remains invariant with the elastic modulus of the film. The unstable modes are found to be long-wave, for which a nonlinear long-wave analysis and simulations are performed to uncover the dynamics and morphology of dewetting. The stored elastic energy slows down the temporal growth of instability significantly. The simulations also show that a thermodynamically stable film with ...
Add to ORKG