Color My Nanoworld

This Activity introduces students to the unique properties of nanoscale materials through exploration of size-dependent optical properties of gold nanoparticles. Students first prepare a solution of gold nanoparticles. They then investigate the solution’s use as an electrolyte sensor by adding a non-electrolyte and a strong electrolyte, and observing any resulting color changes. This Activity provides an introduction to scientific notation and orders of magnitude by exposing students to nano-sized materials. The Activity also provides connections to topics such as electrolytes, complementary colors, and spectroscopy.

Citation: 

Adam D. McFarland, Christy L. Haynes, Chad A. Mirkin, Richard P. Van Duyne, and Hilary A. Godwin, J. Chem. Educ. 2004, 81, p544A.

Year: 
2004
issue: 
4
Page: 
544A
Article type: