Zobrazeno 1 - 10
of 616
pro vyhledávání: '"Dhinojwala, Ali"'
Adhesion requires molecular contact, and natural adhesives employ mechanical gradients to achieve complete (conformal) contact to maximize adhesion. Intuitively, one expects that the higher the modulus of the top layer, the lower will be the adhesion
Externí odkaz:
http://arxiv.org/abs/2402.15014
Understanding the extent of contact between objects is crucial for surface-driven phenomena in the natural world. While interactions are known to occur at subnanometer-length scales, the techniques needed to measure such small-length scales are lacki
Externí odkaz:
http://arxiv.org/abs/2402.12697
Insects, pick-and-place manufacturing, engineered adhesives, and soft robots employ soft materials to stick to surfaces even in the presence of roughness. Experiments show that the force required for making contact is lower than for releasing it, a p
Externí odkaz:
http://arxiv.org/abs/2307.14233
Polymer brushes have found extensive applications as responsive surfaces, particularly in achieving tunable friction in solvent environments. Despite recent interest in extending this technology to air environments, little is known about the impact o
Externí odkaz:
http://arxiv.org/abs/2304.03658
Autor:
Heil, Christian M., Patil, Anvay, Vanthournout, Bram, Singla, Saranshu, Bleuel, Markus, Song, Jing-Jin, Hu, Ziying, Gianneschi, Nathan C., Shawkey, Matthew D., Sinha, Sunil K., Jayaraman, Arthi, Dhinojwala, Ali
Inspired by structural colors in avian species, various synthetic strategies have been developed to produce non-iridescent, saturated colors using nanoparticle assemblies. Mixtures of nanoparticles varying in particle chemistry (or complex refractive
Externí odkaz:
http://arxiv.org/abs/2210.04381
Autor:
Patil, Anvay, Heil, Christian M., Vanthournout, Bram, Singla, Saranshu, Hu, Ziying, Ilavsky, Jan, Gianneschi, Nathan C., Shawkey, Matthew D., Sinha, Sunil K., Jayaraman, Arthi, Dhinojwala, Ali
Publikováno v:
ACS Materials Letters 2022
Bright, saturated structural colors in birds have inspired synthesis of self-assembled, disordered arrays of assembled nanoparticles with varied particle spacings and refractive indices. However, predicting colors of assembled nanoparticles, and ther
Externí odkaz:
http://arxiv.org/abs/2205.13093
Autor:
Patil, Anvay, Heil, Christian M., Vanthournout, Bram, Bleuel, Markus, Singla, Saranshu, Hu, Ziying, Gianneschi, Nathan C., Shawkey, Matthew D., Sinha, Sunil K., Jayaraman, Arthi, Dhinojwala, Ali
Melanin is a ubiquitous natural pigment that exhibits broadband absorption and high refractive index. Despite its widespread use in structural color production, how the absorbing material, melanin, affects the generated color is unknown. Using a comb
Externí odkaz:
http://arxiv.org/abs/2111.10687
Autor:
Maksuta, Daniel, Dalvi, Siddhesh, Gujrati, Abhijeet, Pastewka, Lars, Jacobs, Tevis DB, Dhinojwala, Ali
Publikováno v:
Soft Matter (2022), 18(31), 5843-5849
When adhesive elastomeric materials slide over hard rough surfaces at low velocities, there are two primary dissipative mechanisms that control how friction changes with sliding velocity: viscoelastic dissipation and adhesive dissipation. To distingu
Externí odkaz:
http://arxiv.org/abs/2110.00824
Thermodynamics tells us to expect underwater contact between two hydrophobic surfaces to result in stronger adhesion compared to two hydrophilic surfaces. However, presence of water changes not only energetics, but also the dynamic process of reachin
Externí odkaz:
http://arxiv.org/abs/2102.10789
Molecular disordering of the ice surface occurs below the bulk melting temperature of 273 K, termed surface premelting. The top-most molecular layer begins gradually premelting at 200 K, and has been linked to its low coefficient of friction through
Externí odkaz:
http://arxiv.org/abs/2005.04475