Strong temperature dependence of irradiation effects in organic layers.
Radiation damage of self-assembled monolayers, which are prototypes of thin organic layers and highly organized biological systems, shows a strong dependence on temperature. Two limiting cases could be identified. Reactions involving transport of single atoms and small fragments proceed nearly independent of temperature. Reactions requiring transport of heavy fragments are, however, efficiently quenched by cooling. We foresee the combined use of temperature and irradiation by electrons or photons for advanced tailoring of self-assembled monolayers on surfaces. In addition, our results have direct implications for cryogenic approaches in advanced electron and x-ray microscopy and spectroscopy of biological macromolecules and cells.
Feulner
P
P
Physik Department E20, Technische Universität München, D-85747 Garching, Germany. feulner@tum.de
Niedermayer
T
T
Eberle
K
K
Schneider
R
R
Menzel
D
D
Baumer
A
A
Schmich
E
E
Shaporenko
A
A
Tai
Y
Y
Zharnikov
M
M
D040761:Biomimetic Materials / Q000737:chemistry / Q000528:radiation effects; D003080:Cold Temperature; D006046:Gold / Q000737:chemistry; D046911:Macromolecular Substances / Q000737:chemistry / Q000528:radiation effects*; D008563:Membrane Lipids / Q000737:chemistry / Q000528:radiation effects; D011108:Polymers / Q000737:chemistry / Q000528:radiation effects*; D013438:Sulfhydryl Compounds / Q000737:chemistry; D013696:Temperature
D046911:Macromolecular Substances; D008563:Membrane Lipids; D011108:Polymers; D013438:Sulfhydryl Compounds; D006046:Gold