Xiaonan Chen

Intrinsically stretchable organic electrochemical transistors (IS‐OECTs), utilizing organic mixed ionic‐electronic conductors (OMIECs) as their channel materials, have drawn great attention recently because of their potential to enable seamless integration between bioelectronic devices and living systems. However, the fabrication of IS‐OECTs presents challenges due to the limited availability of OMIEC materials that possess the desired combination of mechanical and electrical properties. In this work, 1) we report the first successful fabrication of a vertical intrinsically stretchable OECT (VIS‐OECT), achieved by using elastoadhesive electrodes; 2) we experimentally proved that vertical architecture can push the strain limit of an IS‐OECT from 20% to 50%; and 3) the above finding introduces an unconventional design concept: the strain limit of an IS‐OECT can surpass the intrinsic stretchability of the constituent OMIECs by employing vertical structure.

Depression is one of the most common mental illnesses and is a well‐known risk factor for suicide, characterized by low overall efficacy (3O₄) assisted laser desorption/ionization mass spectrometer platform is presented. The easy‐prepared nanoparticles with optimal vacancy achieve a considerable signal enhancement, characterized by favorable charge transfer and increased photothermal conversion. The optimized Vo‐Co₃O₄ allows for a direct and robust record of plasma metabolic fingerprints (PMFs). Through machine learning of PMFs, high‐performance depression diagnosis is achieved, with the areas under the curve (AUC) of 0.941–0.980 and an accuracy of over 92%. Furthermore, a simplified diagnostic panel for depression is established, with a desirable AUC value of 0.933. Finally, proline levels are quantified in a follow‐up cohort of depressive patients, highlighting the potential of metabolite quantification in the therapeutic evaluation of depression. This work promotes the progression of advanced matrixes and brings insights into the management of depression.

A rigorous theory for solving general 3-D photonic crystal refraction problem is developed. The power flow direction and transmission intensity of each mode refracted at a periodic surface are rigorously analyzed and determined from matrix equations. We further illustrate how to apply our method to design a low-index-contrast 3-D superprism structure that exhibits efficient transmission over a wide angular scanning range at wavelengths near 1550 nm.