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We prepared several pattern structures of colloidal particles by using an evaporation-induced self-assembly technique, and examined the effect of the salt addition on the pattern morphology.Without the salt addition, a typical resultant structure was particulate stripes, which were parallel to the contact line, under the particle concentration condition we used.The salt addition, however, changed pattern dramatically from parallel stripes to vertical stripes and triangle structure depending on the ion species and salt concentration.