Diamond Qubits for Sensing in Biology
Professor Kris Helmerson
School of Physics, Monash University
3:30 pm Friday, 4 November 2011, EN101 Lecture Theatre (EN Building), Hawthorn.
Optical trapping, typically in the form of optical tweezers, is
a versatile tool for manipulating micron-sized objects in water. More recently, researchers have been looking
at applications of optical trapping for manipulation of single molecules and nanoparticles. I will describe
experiments on the optical trapping of femtoliter volume water droplets for studying single molecules, and
the resonant trapping of metallic nanoparticles. Sequestering of molecules in submicron-sized water droplets
that can be manipulated using optical trapping offers significant advantages over other single molecule
techniques. These advantages include small volume mixing to rapidly change the local environment, as well
as the ability for transit complexes to repeatedly collide within the detection region. Resonant trapping
of particles offers the possibility of enhancing or decreasing the trapping force on an object, thereby
enabling greater selectivity.
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