NSF REU site run as Summer Undergraduate Research Fellowship leveraged with Georgia Tech and Siemens Foundation support involved 8-weeks of immersion in

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Indention tests of chocolate by RET/GIFT teacher Marie Johnson (Chamblee High School, Chamblee, GA) with faculty mentor Valeria Milam. To mimic structural aspects of materials, Marie used pure chocolate, chocolate with porous fillers, and a chocolate-nut “composites.” To vary the ductility, she compared indentions on chocolate at two temperatures. She will use this research experience to develop a laboratory module involving characterization of chocolate in high school physics class. Computer simulations to elucidate adhesion mechanisms in materials (carbon nanotubes) mimicking Gecko’s sticky feet by RET/GIFT teacher Ursula Gordon (North Clayton High School, Atlanta, GA) with faculty mentor Seung Soon Jang. She will use her research experience to develop a module for her high school math class. Simulations indicate decrease in binding energy with increase in C-nanotube length Materials after indention tests at two temperatures to mimic less ductile (room temperature) to more ductile (warmed) chocolate Materials for indention tests ranged from pure chocolate (left), chocolate with “voids” (middle), chocolate- composite (right) REU+RET Site at Georgia Tech: Structure Property Correlations across Length Scales, DMR {P.I.s: N.N. Thadhani, A. Gokhale, C. Summers, V. Milam}