"Invisible Sunblock" is a hands-on activity exploring how nano-scale particles are used in mineral sunblocks to increase their transparency. Visitors compare nano and non-nano sunblocks to a visual representation of the effect of particle size on visibility.
Changing Colors is an interactive exhibit that shows how some high-tech nanomaterials mimic natural phenomena. Super-small, light-reflecting structures—instead of pigments—on the wings of some butterflies create intense, iridescent colors. Nanoscientists have replicated this effect with layered, super-thin films. Watch the colors change on butterfly wings and thin-film slides as you move them beneath a light source, and discover how nanoscale structures can manipulate light and create color. Butterfly specimens deteriorate with heavy use, and may need to be replaced periodically.
The University of Michigan Risk Bites takes a look at five things it is worth knowing about nanoparticles in sunscreens. How safe are they?
Online Brown-Bag: The Science Behind NanoDays 2013 Activities - Part Two: Laddering Activities Around Polymers and Light at the Nanoscale (Recorded)
This is a recording of a NISE Network online brown-bag conversation held in 2013. This brown-bag conversation focused on the science behind NISE activities related to polymers or light at the nanoscale. The following activities were discussed:
• Exploring Fabrication - Gummy Capsules • Exploring Materials - Hydrogel • Exploring Structures - Butterfly • Exploring Materials - Thin Films • Exploring Properties - Invisibility
Presented by: Rashmi Nanjundaswamy and Lizzie Hager-Barnard, Lawrence Hall of Science, Univeristy of California, Berkely
"Exploring Properties - UV Bracelets" is a hands-on activity in which visitors use ultraviolet light to change the color of beads that contain photochromic dye. They learn that the UV beads change color as a result of nanoscale shifts in the shape of the dye molecules.
Mr. O talks about iridescence and Blue Morpho butterflies in another "O Wow" moment at the Children's Museum of Houston.
"Exploring Structures - Butterfly" is a hands-on activity in which visitors investigate how some butterfly wings get their color. They learn that some wings get their color from the nanoscale structures on the wings instead of pigments.
"Exploring Materials - Nano Gold" is a hands-on activity in which visitors discover that nanoparticles of gold can appear red, orange or even blue. They learn that a material can act differently when it’s nanometer-sized.
"NanoSense Activities" has 4 curriculum units to help high school teachers and students understand nanoscale science. Each unit includes background materials, directions and instructional materials. Units include: Size Matters - Introduction to Nanoscience, Clear Sunscreen - How Light Interacts with Matter, Clean Energy - Converting Light into Electricity, and Fine Filters - Filtering Solutions for Clean Water
"Exploring Products - Sunblock" is a hands-on activity comparing sunblock containing nanoparticles to ointment. Visitors learn how some sunblocks that rub in clear contain nanoparticles that block harmful rays from the sun.