Sven Rank Livres

A chemoresistive SnO2 gas sensor measures the resistance of a sensing layer between electrodes to analyze the ambient atmosphere's chemical composition. Noble metal electrodes not only facilitate resistance measurement but also significantly influence sensing performance. This influence stems from electrical factors, such as the electrode gap affecting grain boundaries, and chemical factors due to catalytic processes at the three-phase boundary: electrode, metal oxide, and ambient atmosphere. Solely measuring sensor resistance captures these influences but lacks insight into their causes and potential applications. This work presents operando measurements on screen-printed thick-film SnO2 sensors on Al2O3 substrates, alongside model systems of SnO2 mixed with micrometric Au and Pt powders. Experiments were conducted in dry and humid air, varying CO, H2, and oxygen concentrations. Techniques employed include DC electrical measurements, catalytic conversion experiments, and DRIFTS measurements. Results indicate that sensors with gold electrodes at lower temperatures enhance oxygen adsorption, increasing reactivity with gases like CO and H2. Conversely, sensors with platinum electrodes exhibit reduced signals at specific temperatures due to direct conversion at the noble metal electrodes.

The book traces individuals’ adaptive interventions in the cultural sphere. More specifically, it investigates the purposes of dramatic adapting, which is basically regarded as a political activity. Following the intense micropolitical combat of an author with the precursor Shakespeare, adaptation becomes comprehensible as part of the ceaseless motions of macrocultural change. At each adaptation’s centre, an individual subject’s identity act encounters external discourses, and these transform each other and destabilise ideologies. Moreover, they lay siege to the cultural powerhouse Shakespeare. The book thus explores adapters’ revolt against the loop of eternal repetition, which is created by canonic forces. In order to do so, the author uses an innovative combination of standard theories.