Nishikyushu University

Concentration-Dependent Transition in the Rate-Determining Step of Hydrogen Evolution Driven by Pyridinium-Tethered Mononuclear and Dinuclear Platinum Photocatalysts

Abstract Previous studies on the hydrogen evolution reaction (HER) catalyzed by Pt(II)-based molecular catalysts have often demonstrated a second-order dependence of the HER rate on the catalyst concentration, suggesting the importance of stabilizing dinuclear platinum intermedia...

Multidirectional Colossal Polarization in a Centrosymmetric Crystal via Long-Range Ion Displacement

Abstract Ferroelectrics exhibit spontaneous polarization and are highly functional materials that are widely used in various devices. However, the design of conventional ferroelectric compounds is largely limited to noncentrosymmetric, polar structures. Herein, we demonstrate tha...

Time-Dependent UV/Ozone Treatment Modulates Platelet Adhesion on Polystyrene and Cyclo-Olefin Polymer through Fibrinogen Orientation

Abstract UV/ozone (UVO) treatment is a versatile, solvent-free approach for modifying polymer surfaces in biomedical applications. Although its effects on RGD-dependent cell adhesion have been extensively studied, the mechanisms underlying non-RGD-dependent interactions, specific...

A Programmable Nanovesicle Platform for MegapascalPressure Sensing

Abstract Hydrostatic pressure (HP) is a subtle yet pervasive force that shapes chemistry and biology from the ocean floor to living cells─yet real-time HP sensing at the microscale remains elusive. Here, we report pyrene-modified polyionic complex vesicles (Pyr-PICsomes) as a cla...

Enhanced Room-TemperaturePhosphorescence from CarbonDots Embedded in a Robust SiO2 Matrix

Abstract Carbon dots (CDs) represent a rapidly advancing class of fluorescent nanomaterials. Due to the dominant nonradiative decay channels of the triplet excited state of CDs, these materials generally exhibit no observable phosphorescence (PH) or delayed fluorescence. Here, we...