Safe assemblages: thinking infrastructures beyond circulation in the times of SARS-CoV2.

The ongoing covid-19 pandemic has prompted discussions, both politically and analytically, that frame its security problematic as an infrastructural dilemma that unfolds between the public health-related need for interrupting the movement of people and calls to keep economic processes of production, distribution and consumption going. Moving beyond this diagnosis, we argue that infrastructural responses to the crisis in the European Union have resulted in the creation and invocation of economic and socio-material assemblages that are expected to steer societies through the crisis, which we term 'safe assemblages'. In empirical terms, we discuss the cases of the creation of economic emergency funds which we view as economic assemblages that guarantee payment connectivity for struggling businesses, and of the invocation of the 'home' as an assemblage that minimises contagion risks while maintaining social connectivity through digital means.

A highly-ordered 3D covalent fullerene framework.

A highly-ordered 3D covalent fullerene framework is presented with a structure based on octahedrally functionalized fullerene building blocks in which every fullerene is separated from the next by six functional groups and whose mesoporosity is controlled by cooperative self-assembly with a liquid-crystalline block copolymer. The new fullerene-framework material was obtained in the form of supported films by spin coating the synthesis solution directly on glass or silicon substrates, followed by a heat treatment. The fullerene building blocks coassemble with a liquid-crystalline block copolymer to produce a highly ordered covalent fullerene framework with orthorhombic Fmmm symmetry, accessible 7.

Sub-micron phase coexistence in small-molecule organic thin films revealed by infrared nano-imaging.

Controlling the domain size and degree of crystallization in organic films is highly important for electronic applications such as organic photovoltaics, but suitable nanoscale mapping is very difficult. Here we apply infrared-spectroscopic nano-imaging to directly determine the local crystallinity of organic thin films with 20-nm resolution. We find that state-of-the-art pentacene films (grown on SiO2 at elevated temperature) are structurally not homogeneous but exhibit two interpenetrating phases at sub-micrometre scale, documented by a shifted vibrational resonance.

Mapping of trap densities and hotspots in pentacene thin-film transistors by frequency-resolved scanning photoresponse microscopy.

Frequency-resolved scanning photoresponse microscopy of pentacene thin-film transistors is reported. The photoresponse pattern maps the in-plane distribution of trap states which is superimposed by the level of trap filling adjusted by the gate voltage of the transistor. Local hotspots in the photoresponse map thus indicate areas of high trap densities within the pentacene thin film.

Malignant meningioma as a second malignancy after therapy for acute lymphatic leukemia without cranial radiation.

Rationale: Meningiomas in the pediatric age group are very rare tumors, comprising about 1-4.2% of all primary pediatric intracranial tumors.

Case Report: We present a 17-year-old patient who suffered from an intraventricular malignant meningioma.