Au@Pt/Pd核心外纳米粒子阵列:双模体等离子体传感器,具有可调节的可逆/不可逆传感行为
Peijie Ren1, Shunsheng Ye1, Chao Li1
1Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, People's Republic of China.
ACS sensors
|October 3, 2025
概括
这项研究介绍了一种使用金 (Au@Pt) 纳米粒子阵列的新型双模式等离子体传感器. 它可逆检测低度,可逆信号高度,为各种应用提供可调的灵敏度.
科学领域:
- 纳米材料科学 科学 纳米材料科学
- 化学传感器 化学传感器
- 塑制剂是一种塑制剂.
背景情况:
- 开发具有双检测模式 (可逆和不可逆) 的光学传感器是一个重大挑战.
- 现有的传感器往往缺乏在单个平台上信号低度可逆性和高度不可逆性的能力.
研究的目的:
- 设计一个用于光学探测的单一平台,既可逆检测低度的H2,也可逆信号高度的H2.
- 研究纳米粒子阵列中双模传感背后的机制.
主要方法:
- 金 (Au@Pt) 核心外纳米粒子阵列 (NA) 的制造.
- 在不同 (H2) 度下对光学特性 (灭绝峰值转移,强度变化) 的研究.
- 调整关键过渡度 (CTC) 通过合金外与 (Pd).
主要成果:
- 由于介电变化和不可逆转的聚合 (>10% H2),Au@Pt NAs表现出可逆的蓝色转移 (<10% H2),导致颜色变化和强度下降.
- 关键过渡度 (CTC) 可以通过将Pt与Pd合金调整,将其降低到1%H2与25%Pd.
- 较高的Pd比率导致完全不可逆转的反应.
结论:
- Au@Pt NAs通过整合可逆介电调制和不可逆聚合机制,作为双模态等离子体传感器.
- 传感器的灵敏度可以通过Pd合金系统调节,从而扩大其适用性.
- 这项工作引入了一种新的基于Pt的等离子传感器类别,具有用于各种探测场景的双模式功能.
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