Self-Assembled Nano-Drums

MHz Nano-mechanical Resonators

Using the expertise in nanoparticle synthesis and assembly built up in IRG 3, a University of Chicago MRSEC team comprised of members of the Jaegerand Talapin groups collaborated with Xiao-Min Lin and Jeffrey Guest at Argonnes Center for Nanoscale Materials and John Sader from the University of Melbourne to develop the first completely self-assembled nano-mechanical resonator. It forms when a  nanoparticle monolayer drapes itself over a hole several microns in diameter to produce a 10nm thin, freestanding membrane that vibrates in the MHz range (transmission electron microscope images shown in left inset). Vibration spectra (left) and images of the vibration patterns (right; out-of-phase regions indicated by different color) are obtained with an interferometric laser microscope that scans across the membrane and can detect vibration amplitudes as small as a few pico-meters. 

Self-Assembled Nanoparticle Drumhead Resonators

Pongsakorn Kanjanaboos, Xiao-Min Lin, John E. Sader, Sara M. Rupich, Heinrich M. Jaeger, and Jeffrey R. Guest, Nano Letters 2013 13 (5), 2158-2162