SrAl2O4:Eu2+,Dy3+ 长光后及其用于光机传感应用的柔性薄膜
Akshay M Achari1, Vanishree Perumalsamy1, Godavarthi Swati1
1Centre for Nanotechnology Research, Vellore Institute of Technology, Vellore 632014, India.
ACS omega
|December 11, 2023
概括
灵活的机械发光膜是使用聚乙烯醇水凝和氨酸酸制成的. 这些片显示出增强的机械性能和在冲击下稳定的光辐射,适合灵活的冲击传感器.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 发光的光度是非常的低.
背景情况:
- 机械发光 (ML) 涉及机械应力下材料的光辐射.
- 与Eu2+和Dy3+合的氨酸 (SrAl2O4) 是一种具有光发光特性的已知.
研究的目的:
- 开发高度灵活和机械坚固的机械发光膜.
- 调查溶剂成分对水凝特性和ML性能的影响.
- 评估这些薄膜在冲击传感应用中的潜力.
主要方法:
- 将SrAl2O4:Eu2+,Dy3+融入一个聚乙醇 (PVA) 水凝矩阵中.
- 优化溶剂比率 (二甲基硫氧化物:水) 以提高水凝的性能.
- 机械性能 (抗拉强度,延长,硬度),透明度和热稳定性 (TGA) 的表征.
- 测试机械发光 (ML) 强度对冲击力和光发光 (PL) 辐射的依赖性.
主要成果:
- 使用优化的DMSO:水 (80:20重量%) 的PVA水凝显示出更好的灵活性,抗撕裂性和硬度.
- 由此产生的薄膜具有很高的抗拉强度 (13.4 MPa) 和延伸应变 (620%).
- ML的排放强度显示出对冲击力的线性依赖.
- 具有很高的热稳定性,在100°C时保持约90%的发射强度.
- 热重力测量分析证实了复合膜的热稳定性.
结论:
- 成功地制备了高度灵活,机械强,热稳定的机械发光膜.
- 开发的片是自动供电的灵活冲击传感应用的有希望的候选者.
- 使用DMSO作为辅溶剂显著增强了PVA水凝矩阵的特性.
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