JILA Auditorium

Visualizing Cryoprotectant Permeation and Location Confined in Plant Cells and Tissues

When
-

Abstract:  Look out your window and you might see a conifer tree covered with snow. Ever wonder how the needles stay alive all winter long as the temperature dips below freezing? Like pine trees, some organisms possess molecules that naturally enable them to withstand cold. Scientists have copied nature to develop methodology to cryopreserve biological materials, storing them at low temperatures for future use. The first step in any cryopreservation protocol involves dosing the sample with a cocktail of cryopreservation agents, molecules that help them stay viable.

A dissipative quantum simulator of lasing dynamics at the few quanta level

When
-

Abstract: I will present our trapped-ion system with engineered competing dissipation channels, implemented independently on two ions of different specied co-trapped in the same potential well. We explore the phase diagram of the system, which is analogous to that of a (phonon) laser by precise control of the spin-oscillator couplings and the dissipative channels.

Quantization effects in semiconductor nanostructures and singlet fission in molecular chromophores for photovoltaics and solar fuels

When
-

Abstract: Hot carriers in semiconductors are electrons and/or holes that have energies greater than carriers that reside at the top and bottom of the conduction and valence bands, respectively; the latter carriers are in equilibrium with the lattice and have a temperature equal to the lattice (ambient) temperature. Hot carriers are created in semiconductors upon the absorption of photons with energies greater than the bandgap. The excess energy above the bandgap energy is in the form of kinetic energy.

Subscribe to JILA Auditorium