A high-frequency light-induced electron spin resonance study of conjugated polymer/fullerene composites

MAGNETISATION AND ELECTRON SPIN RESONANCE STUDIES OF TETRAHEDRAL AMORPHOUS CARBON

The magnetisation and electron spin resonance (ESR) spectrum of two specimens of tetrahedral amorphous carbon (ta-C), deposited from a filtered cathodic arc, were measured over a wide temperature range. The magnetisation was found to consist of superparamagnetic, paramagnetic and diamagnetic contributions. The superparamagnetic contribution resembled that recently found in carbon prepared from ...

Light-induced electron spin resonance in amorphous hydrogenated germanium

We report the observation of light-induced electron spin resonance ~LESR! in amorphous hydrogenated germanium. Two new lines with zero crossings near g52.01 and g52.03 were detected and ascribed to electrons and holes in the conductionand valence-band-tail states, respectively. The ratio between the LESR spin densities of both lines is approximately one, suggesting the absence of spin pairing, ...

Aqueous sample holders for high-frequency electron spin resonance

A quasioptical approach is utilized to design a resonator and sample holder for aqueous samples for high-frequency ~250 GHz! electron spin resonance ~ESR! spectroscopy. A disk shaped sample geometry was chosen to match the field contours of the fundamental mode in a Fabry–Perot resonator. A transmission-line analysis is used to determine the optimum sample geometry while taking into account dif...

Electron Spin Resonance with Far Infrared Light

Electron Spin Resonance on Carbon Nanotubes–Polymer Composites

Electron spin resonance investigations on styrene–polyisoprene–polystyrene block copolymer loaded with various amounts of multiwalled carbon nanotubes are reported. The temperature dependence of resonance line parameters in the range 290–425 K was analyzed. It was proved that the main resonance line represents a bottleneck of localized and delocalized electrons residing on carbon nanotubes. The...