👉 The Andry fluid, also known as the Andry liquid or Andry's fluid, is a colloidal suspension of fine particles in a liquid that exhibits unique properties, such as the ability to flow like a liquid while also behaving like a solid when compressed. Discovered by Georges Andry in the early 20th century, this fluid is composed primarily of silica nanoparticles suspended in water, with the particles being smaller than 100 nanometers. Under normal conditions, it flows easily and fills any container, but when subjected to pressure, the particles clump together, causing the fluid to behave like a solid and adhere to surfaces. This dual nature makes it useful in various applications, including as a binder in adhesives, a coating material, and in the study of complex fluids.
