7 papers
Impact dynamics of flexible hydrogels on solid substrates of different wettabilities
Akash Chowdhury, Surjyasish Mitra, Sushanta K. Mitra
In this work, we perform experiments with spherical polyacrylamide (PAAm) hydrogel drops/spheres, spanning a broad range of shear moduli and impact velocities on hydrophilic (plasm…
Spontaneous rolling on a 90 degree incline
Surjyasish Mitra, A-Reum Kim, Boxin Zhao +1
On perfectly vertical surfaces, rolling is conventionally deemed impossible without external torque. While various species like geckos and spiders exhibit vertical locomotion, they…
A density functional theory approach to interpret elastowetting of hydrogels
Priyam Chakraborty, Surjyasish Mitra, A-Reum Kim +2
Sessile hydrogel drops on rigid surfaces exhibit wetting/contact morphology intermediate between liquid drops and glass spheres. Using density functional theory, we reveal the cont…
Flexible hydrogels connecting adhesion and wetting
A-Reum Kim, Surjyasish Mitra, Sudip Shyam +2
Raindrops falling on window panes spread upon contact, whereas hail can cause dents or scratches on the same glass window upon contact. While the former phenomenon resembles classi…
Unsteady wetting of soft solids
Surjyasish Mitra, Quoc Vo, Marcus Lin +1
From hydrogels and plastics to liquid crystals, soft solids cover a wide array of synthetic and biological materials that play key enabling roles in advanced technologies such as 3…
Viscous droplet impingement on soft substrates
Marcus Lin, Quoc Vo, Surjyasish Mitra +1
Viscous droplets impinging on soft substrates may exhibit several distinct behaviours including repeated bouncing, wetting, and hovering, i.e., spreading and retracting after impac…
Bouncing-to-wetting transition for impact of water droplets on soft solids
Surjyasish Mitra, Quoc Vo, Tuan Tran
Soft surfaces impacted by liquid droplets trap more air underneath than their rigid counterpart. The extended lifetime of the air film not only facilitates bouncing behaviours of t…