Heat transfer across hybrid organic-inorganic interfaces was measured by infrared pump, electronic probe spectroscopy (IPEP) which does not use electronic excitation, thereby removing any measurement artifacts.
Significance and Impact
Matching vibrational and molecular structure of ligands with surrounding solvents allows for quicker cooling of colloidal nanocrystals, which has implications for heat management in areas such as thermoelectrics.
- Femtosecond infrared pulses heat up organic ligands which transfer heat to attached inorganic nanoparticles, changing the bandgap on a 10 picosecond time-scale, followed by loss of heat to the surrounding solvent over hundreds of picoseconds.
- IPEP measurements were performed at CNM using ultrafast transient absorption spectroscopy.
This work was performed at the Center for Nanoscale Materials.
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