title: Electric-field-induced patterns in soft viscoelastic films: from long waves of viscous liquids to short waves of elastic solids.
abstract: We show that the electric field driven surface instability of viscoelastic films has two distinct regimes: (1) The viscoelastic films behaving like a liquid display long wavelengths governed by applied voltage and surface tension, independent of its elastic storage and viscous loss moduli, and (2) the films behaving like a solid require a threshold voltage for the instability whose wavelength always scales as approximately 4xfilm thickness, independent of its surface tension, applied voltage, loss and storage moduli. Wavelength in a narrow transition zone between these regimes depends on the storage modulus.
authors: Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India.
authors: N
authors: N
authors: Arun
authors: Ashutosh
authors: A
authors: Sharma
authors: Partho S G
authors: PS
authors: Pattader
authors: Indrani
authors: I
authors: Banerjee
authors: Hemant M
authors: HM
authors: Dixit
authors: K S
authors: KS
authors: Narayan