We describe a method for patterning substrates with colloidal particles in any designed twodimensional structure. By using optical tweezers particles are brought from a reservoir to a surface that carries a surface charge opposite to that of the particles. Using this technique large,

Proc. MRS

Vossen, D. L. J., Hoogenboom, J. P., Overgaag, K., & van Blaaderen, A. (2002). Building two and three dimensional structures of colloidal particles on surfaces using optical tweezers and critical point drying. Proc. MRS, 705.