Microwave-Assisted Solvothermal Synthesis of Cesium Tungsten Bronze Nanoparticles

Nanomaterials, Journal Year: 2025, Volume and Issue: 15(8), P. 627 - 627

Published: April 20, 2025

Cesium tungsten bronzes (CsxWO3), as functional materials with excellent near-infrared shielding properties, demonstrate significant potential for applications in smart windows. However, traditional synthesis methods, such solid-state reactions and solvothermal/hydrothermal approaches, typically require harsh conditions, including high temperatures (above 200 °C), pressure, inert atmospheres, or prolonged reaction times. In this study, we propose an optimized microwave-assisted solvothermal strategy that significantly reduces the severity of conditions through precise parameter control. When benzyl alcohol was employed solvent, CsxWO3 nanoparticles could be rapidly synthesized within a relatively short duration 15 min at 180 °C, alternatively obtained 2 h low temperature 140 °C. when anhydrous ethanol, which is cost-effective environmentally friendly, substituted alcohol, successful also achieved °C h. This method overcomes limitations high-pressure systems, achieving efficient crystallization under low-temperature ambient-pressure while eliminating safety hazards improving energy efficiency. The resulting retain performance visible-light transparency, providing innovative solution safe, rapid, controllable nanomaterials.

Language: Английский

Multicolor Electrochromism via Plasmonic Tuning in Au NBPs@PANI Nanostructures with Ultrafast Switching and Enhanced Bistability

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Gold nanobipyramids (Au NBPs) exhibit pronounced localized surface plasmon resonance (LSPR) properties, demonstrating the significant potential for diverse photonic applications. However, they are constrained to static plasmonic structural color displays, significantly limiting their practical utility. Herein, an innovative approach is presented dynamically regulating colors of gold nanoparticles through electrochemical manipulation. By precisely controlling redox state polyaniline (PANI) nanoshell coating on Au NBPs@PANI core–shell structures, tunable shifts in LSPR peak position NBPs achieved, consequently enabling precise modulation. Through systematic optimization PANI deposition cycles, optimal shell thickness 25 nm identified enhanced performance. The engineered composite demonstrates remarkable electrochromic exhibiting reversible transitions among three distinct (green, cyan, and blue) with ultrafast switching speed 100 ms exceptional cycling stability (maintaining consistent absorbance characteristics 200 cycles). Furthermore, system exhibits excellent bistability, maintaining its chromatic over 30 min after voltage removal, thereby reducing energy consumption. This research establishes a cost‐effective, scalable fabrication performance strategy advanced materials, offering promising technical support energy‐efficient electronic paper displays related

Language: Английский