Andrin Doll

TL;DR: It is demonstrated that adiabatic and fast passage ultra-wideband (UWB) pulses can achieve inversion over several hundreds of MHz and thus enhance the measurement sensitivity, as shown by two selected experiments.

TL;DR: Frequency-swept chirp pulses are utilized as pump pulses in the DEER experiment to balance modulation depth and echo intensity for optimum sensitivity, and larger sensitivity is anticipated for Gd(III) complexes with zero-field splitting that is smaller than for the employed Gd-PyMTA complex.

TL;DR: The echo envelope modulation experiments reveal echo decay rates increased by enhanced instantaneous diffusion and passage-specific effects in the nuclear modulations, and peculiarities were observed in solid-state FT EPR spectra of disordered systems.

TL;DR: In order to enhance echo signals observed with selective pulses, equilibrium populations of the energy levels of S = 7/2 Gd(III) spin labels are rearranged with frequency-swept passage pulses and a dipolar modulation depth of 9% is demonstrated, which results in an enhancement of 3.3 with respect to data obtained with monochromatic rectangular pulses.

TL;DR: Based on the bandwidth limitations that arise from spin dynamics, requirements are derived for a spectrometer that achieves precise spin control over wide bands and the design of such aSpectrometer and hardware characterization by EPR experiments are discussed.