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The controllable liquid transfer of a Chinese brush is attributable to the unique anisotropic multi‐scale structures of the freshly emergent hairs. A large mass of liquid an be dynamically balanced within the brush as a cooperative effect of the Laplace pressure difference, the asymmetrical retention force, and gravity. Inspired by this, a device is developed with parallel hairs that allows for direct...
As an important writing tool over the past 5000 years, Chinese brushes allow manipulation of ink in a controlled manner. L. Jiang, H. Liu, and co‐workers demonstrate on page 4889 that controllable liquid transfer of the Chinese brush is attributable to the unique anisotropic multi‐scale structures of the freshly emergent animal hairs. Drawing inspiration, a device with parallel hairs is developed...
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