Rod-shaped cellulose nanoparticles can be extracted from wood and other natural cellulose sources. These particles, called cellulose nanocrystals (CNCs), can self-organize into periodic structures that can be dried to give iridescent, colored films. The color depends solely on the structure of the NCC assembly and not the pigments, which can be toxic or fade with time and exposure to sunlight.
In this workshop, we will look at "structural colors" by studying examples from nature, such as butterfly and beetle wings or Pollia Bay. We will then move on to a description of wood, the most common source of NCCs, and finally we will see how NCCs come together to give bright, iridescent colors. We will also think together about the potential applications of these colored films.
Duration: 1 hour
Time : 10am
Meeting point : hall of the MX building