Wednesday Colloquia
Proteins can be "Good" Electronic Conductors !
by Prof. David Cahen (Weizmann Institute of Science, Israel)
Wednesday, January 2, 2019
from
to
(Asia/Kolkata)
at Lecture Theatre ( AG-66 )
at Lecture Theatre ( AG-66 )
TIFR
Description |
Solid state Electron Transport (ETp), electronic conduction, across protein monolayers is surprisingly efficient. Length-normalized their ETp is like that of conjugated molecules; it is temperature-independent down to 15 K. That's amazing as nature hardly seems to use this feature, except for electron transfer, ET, a central, ion transport-coupled process in biology. If contacts don't limit ETp, i.e., intra-protein transport dominates, we cannot measure a transport barrier. Understanding ETp may be important also for ET, where electron injection/extraction is replaced by coupling to the contacts. I'll show experimental data (1,2), including recent ones from us and others, which help to define the puzzle, that's looking for a solution. References: 1. C. Bostick et al. Rep. Progr.Phys., 81 (2018) 026601 2. N. Amdursky et al., Adv. Mater. 42, (2014) 7142 |