Structured porous silicon sub-micrometer wells grown by colloidal lithographyM. Manso Silván, M. Arroyo Hernández, V. Torres Costa, R. J. Martín Palma and J. M. Martínez DuartEurophys. Lett., 76 4 (2006) 690-695DOI: https://doi.org/10.1209/epl/i2006-10331-2