The relational ontology of mobile touchscreens and the body: Ambient proprioception and risk during COVID-19.

In this article, we explore the tension between the significance of touch as a vital sensory modality of human experience and how, with the ongoing coronavirus pandemic, proximity and (tactile) intimacy with other bodies in urban and domestic spaces becomes fraught with the risk of viral contagion. Informed by haptic media studies, the corporeal or sensory turn in contemporary theory, and phenomenology-informed mobile media studies, we examine the possible impacts for mobile device use of the risks of viral contagion associated with our routinized uses of haptic interfaces. We also examine the role and possibility of mobile haptics and the touchscreen in these contexts, and our capacity-via embodied and material metaphor-to extend corporeal reach through the mobile interface. Our contention is that, while the "stand in" for touch that mobile media offers may be perpetually incomplete, the "as-if" structure of habitual experience can play a significant role in narrowing the sensorial gap.

Superlattice Nanofilm on a Touchscreen for Photoexcited Bacteria and Virus Killing by Tuning Electronic Defects in the Heterointerface.

Currently, the global COVID-19 pandemic has significantly increased the public attention toward the spread of pathogenic viruses and bacteria on various high-frequency touch surfaces. Developing a self-disinfecting coating on a touchscreen is an urgent and meaningful task. Superlattice materials are among the most promising photocatalysts owing to their efficient charge transfer in abundant heterointerfaces. However, excess electronic defects at the heterointerfaces result in the loss of substantial amounts of photogenerated charge carrier. In this study, a ZnOFe2 O3 superlattice nanofilm is designed via atomic layer deposition for photocatalytic bactericidal and virucidal touchscreen. Additionally, electronic defects in the superlattice heterointerface are engineered. Photogenerated electrons and holes will be rapidly separated and transferred into ZnO and Fe2 O3 across the heterointerfaces owing to the formation of ZnO, FeO, and ZnFe covalent bonds at the heterointerfaces, where ZnO and Fe2 O3 function as electronic donors and receptors, respectively. The high generation capacity of reactive oxygen species results in a high antibacterial and antiviral efficacy (>90%) even against drug-resistant bacteria and H1N1 viruses under simulated solar or low-power LED light irradiation. Meanwhile, this superlattice nanofilm on a touchscreen shows excellent light transmission (>90%), abrasion resistance (106 times the round-trip friction), and biocompatibility.