A dusty plasma is a plasma containing millimeter (10−3) to nanometer (10−9) sized particles suspended in it. Dust particles are charged and the plasma and particles behave as a plasma. Dust particles may form larger particles resulting in 'grain plasmas'. Due to the additional complexity of studying plasmas with charged dust particles, dusty plasmas are also known as complex plasmas.:2 A dusty plasma is a plasma containing millimeter (10−3) to nanometer (10−9) sized particles suspended in it. Dust particles are charged and the plasma and particles behave as a plasma. Dust particles may form larger particles resulting in 'grain plasmas'. Due to the additional complexity of studying plasmas with charged dust particles, dusty plasmas are also known as complex plasmas.:2