Violet phosphorus quantum dots and Au nanoparticles co-modified black TiO2 nanorod arrays as enhanced SERS substrate

IF 4.9 2区化学 Q2 CHEMISTRY, PHYSICAL

Colloids and Surfaces A: Physicochemical and Engineering Aspects Pub Date : 2025-05-21 DOI:10.1016/j.colsurfa.2025.137279

Jun Guo , Wei Gan , Ruixin Chen , Zifeng Wang , Xiaofen Xu , Deshuo Meng , Miao Zhang , Zhaoqi Sun

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引用次数: 0

Abstract

To create exceptional surface-enhanced Raman scattering (SERS) substrates, it is essential to strategically design noble metals or semiconductors. In this research, we accomplished the development of a novel high-performance surface- SERS substrate by violet phosphorus quantum dots (VPQDs) and Au nanoparticles co-sensitized black TiO₂ nanorod arrays (VPQDs/Au/B-TiO₂). The detection ability of 4-mercaptobenzoic acid (4-MBA) on this novel SERS substrate could reach 1.0 × 10⁻¹⁴ M. Furthermore, the calculated enhancement factor (EF) reached a remarkable 3.8 × 10⁵. In addition, three suggested pathways for the carriers of VPQDs/Au/B-TiO₂ during SERS process were identified. The enhanced SERS performance of the VPQDs/Au/B-TiO₂ system were credited to the generation of high-energy electrons originating from the localized surface plasmon resonance (LSPR) of Au nanoparticles. Additionally, this system exhibited improved light utilization efficiency by extending light harvest from the ultraviolet to the visible area. Finally, enhanced carrier transfer is also an important complement to improved performance. In conclusion, this research suggests a potential pathway for developing ideal SERS substrate that exhibit outstanding performance.

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紫磷量子点和金纳米粒子共修饰黑色TiO2纳米棒阵列作为增强SERS衬底

为了制造优异的表面增强拉曼散射（SERS）衬底，必须战略性地设计贵金属或半导体。在本研究中，我们通过紫磷量子点（VPQDs）和金纳米粒子共敏黑色TiO2纳米棒阵列（VPQDs/Au/B-TiO2），完成了一种新型的高性能表面SERS衬底的开发。该新型SERS底物对4-巯基苯甲酸（4-MBA）的检测能力可达1.0 × 10−14 m，计算出的增强因子（EF）达到3.8 × 105。此外，我们还确定了VPQDs/Au/B-TiO2在SERS过程中的三种可能的载体途径。VPQDs/Au/B-TiO2体系SERS性能的增强归功于Au纳米粒子的局部表面等离子体共振（LSPR）产生的高能电子。此外，该系统通过将光收获从紫外区扩展到可见光区，提高了光利用效率。最后，增强载波传输也是改进性能的重要补充。总之，本研究提出了一种开发性能优异的理想SERS底物的潜在途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Colloids and Surfaces A: Physicochemical and Engineering Aspects 化学-物理化学

CiteScore

8.70

自引率

9.60%

发文量

2421

审稿时长

56 days

期刊介绍： Colloids and Surfaces A: Physicochemical and Engineering Aspects is an international journal devoted to the science underlying applications of colloids and interfacial phenomena. The journal aims at publishing high quality research papers featuring new materials or new insights into the role of colloid and interface science in (for example) food, energy, minerals processing, pharmaceuticals or the environment.