May 2017. The Willets Lab visits Freire Charter School in Philadelphia for a nanoparticle synthesis day
Activity: the students prepared silver nanoprisms following the procedure from Kitaev and coworkers (J. Chem. Ed. 87 (2010) 1098-1101).
Students started by preparing the same set of nanoprism solutions, in which no potassium bromide was added, and everyone successfully made blue solutions of silver nanoprisms. Then we allowed the students to pick varying amounts of potassium bromide to be added, yielding solutions of varying colors!! We finished with a discussion of the relationship between size and properties on the nanoscale (here, nanoprism size and color) as well as discussion of chemical synthesis.