The reversible variation in the observed stop band of a hydrogel-encapsulated crystalline colloidal array was achieved through the selective formation and destruction of -S-Pb-S- linkages within the hydrogel. A reversible 45nm stop band shift could be achieved with a cyclical treatment of Pb2+and then dithiothreitol solution. © 2012 Elsevier Inc..
Dai, Y., Bao, H., Lin, J., Rungta, P., & Foulger, S. H. (2012). Reversible crosslinking density stimulated diffraction wavelength tuning of hydrogel-encapsulated crystalline colloidal arrays. Journal of Colloid and Interface Science, 377(1), 485–488. https://doi.org/10.1016/j.jcis.2012.03.053