Moths are commonly the target of visual predators such as birds, and hence have evolved some of the most sophisticated of animal pigment patterns. Moths employ coloration for visual misdirection, deterrents, and camouflage, as well as for sexual recognition. Recently, we discovered that all might not be as it seems to human eyes. Noting that both birds and moths have been shown to perceive UV wavelengths, we assessed the coloration of moths under UV lamp light. Under UV lamp light the coloration of some moth species changes. Here, we show that the wings of Jersey Tiger (Euplagia quadripunctaria) moths exhibit fluorescence, a phenomenon observed for the first time in this species. Both the white and red scales of these moths display fluorescence. While UV lamp illumination prompts similar emissions from both white and red scales, 405 nm laser illumination reveals distinct fluorescence spectra. Despite no apparent structural differences observed under SEM between the white, black, and red scales, fluorescence emanates from the entire nanostructured architecture of the scales, indicating a chemical presence throughout. Chemical disparities between the scales are detected via FTIR, though identifying the specific pigment proves elusive. Further investigation is necessary to ascertain the pigments responsible for fluorescence. Additionally, this study prompts exploration of fluorescence patterns in other moth species. The biological significance of this fluorescence phenomenon warrants further inquiry.
Material and functional stability remains a major issues in field of perovskite photovoltaics. To achieve a long device lifetime, it is crucial that we understand and optimize the lifetime of the material itself. One-step antisolvent processing is a facile method to enhance stability. Herein, we report that changes in the degradation process of perovskite films is modified by the antisolvent treatment in comparison to the conventional film without the process which we measure by monitoring the emission. Perovskite films prepared with anti-solvent processing have improved film morphology and reduced evolution of surface metallic lead, which correlated with improved film lifetimes.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.