Influence of Interfacial Stress on the Structural Characteristics and Hydrogen Sensing Performance of WO₃ Films.

ABSTRACT: Tungsten trioxide (WO₃) exhibits complementary optical and electrical responses toward hydrogen, yet the interplay between interfacial stress, crystal phase stabilization, and gasochromic/chemiresistive performance remains insufficiently understood. In this work, WO₃ films were grown on four single-crystal oxide substrates to systematically tune interfacial stress and thereby modulate the resulting crystal phase, microstructure, and exposed facets. θ-2θ diffraction revealed that WO₃ adopts a monoclinic phase on YAlO₃ and SrLaAlO₄, whereas a high-temperature orthorhombic phase is stabilized on LaAlO₃ (LAO) and SrTiO₃ due to stronger interfacial constraint. Compared with the amorphous quartz reference, the single-cr

SUBMITTER: Qiao Z 

PROVIDER: S-EPMC12693085 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature