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Electronic skin plays an important role in the age of artificial intelligence. Capacitive pressure sensors, capable of sensing pressure changes through contact, still need to improve their basic performance and comfort of use. In this paper, a flexible strontium alginate film with finely folded crater microstructure prepared by spraying method is introduced as a dielectric layer, together with PDMS film and conductive cloth as a capacitive sensor. The internal and external displacement, potential, and elastic volume ratio of the sensor were simulated using finite element analysis. The sensor has good sensitivity (R2 up to 0.99), very low response and relaxation time (≤ 50 ms), and good cyclic stability. The sensor was also used for performing several simple applications tests. • A transparent and ultrathin flexible film with crater microstructure and uniform fine pleated structure prepared by spraying method. • The dielectric constant of the SCA film reached 15.3, which was 1.18 times higher than that of the SA film and 4.5 times higher than that of the PDMS film. • The relative dielectric constant of the dielectric layer increases due to ion displacement polarization generated at the surface of the SCA film. • The capacitive pressure sensor presents high sensitivity, very short response and relaxation times, and good cycling stability. [ABSTRACT FROM AUTHOR]

Despite the discovery of superconducting properties in thin films with an infinite-layer structured nickelate has paved the way for exploring unconventional superconductivity, opening up new possibilities in this field. However, the challenges related to fabricating these samples have greatly restricted research in this area. In this study, we successfully fabricated superconducting thin films of La 0.8 Sr 0.2 NiO 2 and investigated their tolerance to different environmental factors. To analyze the stability of the superconducting La 0.8 Sr 0.2 NiO 2 thin films, we assessed their tolerance to temperature by examining the peak intensities in X-ray diffraction (XRD) and monitoring the changes in resistance curves at varying temperatures. In addition, we investigated the films' sensitivity to acidity and alkalinity by immersing them in acidic and alkaline solutions for various durations. We also studied the stability of the thin films under various conditions, including heating in air, heating in a vacuum, exposure to acid and alkali, as well as exposure to the organic solvent acetone solution. Our findings highlight the successful preparation of superconducting La 0.8 Sr 0.2 NiO 2 thin films and shed light on their stability in different environments. This research provides valuable insights for further exploration of their potential applications and laid the foundation for advancements in the field of unconventional superconductivity. [Display omitted] • We successfully fabricated superconducting thin films of La 0.8 Sr 0.2 NiO 2 and investigated their tolerance to different environmental factors. • We investigated the resistance and X-ray diffraction changes in nickelate under various conditions, including heating in air and vacuum, and exposure to 10M NaOH, 1M HCl, and acetone. Our findings indicate that the stability of La 0.8 Sr 0.2 NiO 2 superconductivity is affected by environmental factors, losing its superconductivity at 160°C in air and 220°C in vacuum. • Our research shows that our superconducting sample loses superconductivity upon immersion in an acidic solution but remains stable in an alkaline environment, maintaining zero resistance for up to 2 h in 10M NaOH before losing superconductivity after 3 hours. Additionally, La 0.8 Sr 0.2 NiO 2 loses superconductivity and exhibits insulating behavior after 330 minutes in acetone. [ABSTRACT FROM AUTHOR]