Indole-7-carboxaldehyde functionalized silver and gold nanoparticles as novel metal-organic laser power limiting composites

IF 2.5 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2025-04-05 DOI:10.1016/j.photonics.2025.101386

Shradha Lakhera , Meenakshi Rana , A. Dhanusha , T.C. Sabari Girisun , Shruti Sharma , Papia Chowdhury

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Abstract

Efforts were done to enhance the nonlinear optical and optical power limiting responses of Indole-7-carboxaldehyde (I7C) after the addition of silver and gold nanoparticles. The investigations were done theoretically as well as experimentally. The reactivity parameters and potential surfaces established strong intermolecular charge interactions between metal trimer and I7C. The diffraction pattern for both I7C+AgNPs and I7C+AuNPs indicated the perfect crystallinity of the samples. The band gap of I7C+AgNPs (2.08 eV) was less than that of I7C+AuNPs (2.34 eV). The polarizability of I7C was enhanced after the addition of gold and silver nanoparticles. The value of first-order hyperpolarizability of probe I7C was observed as 4.24 × 10⁻³⁰ esu which was increased to ten times for I7C+AgNPs and eighteen times for I7C+AuNPs. The increased value of first-order hyperpolarizability supported enhanced nonlinear optical characteristics of I7C+AgNPs and I7C+AuNPs. Further, the reduction in experimentally obtained optical limiting threshold and increment in the nonlinear absorption coefficient reflects early attenuation of the nonlinear optical and enhanced optical limiting activity of I7C+AgNPs and I7C+AuNPs.

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吲哚-7-甲醛功能化纳米银和纳米金作为新型金属有机激光限功率复合材料

研究了加入纳米银和纳米金后，吲哚-7-甲醛（I7C）的非线性光学响应和光功率限制响应。这些研究既有理论上的，也有实验上的。反应性参数和电位表面表明金属三聚体与I7C之间存在很强的分子间电荷相互作用。I7C+AgNPs和I7C+AuNPs的衍射图表明样品具有良好的结晶度。I7C+AgNPs的带隙（2.08 eV）小于I7C+AuNPs（2.34 eV）。金纳米粒子和银纳米粒子的加入增强了I7C的极化率。探针I7C的一阶超极化率为4.24 × 10−30 esu， I7C+AgNPs为10倍，I7C+AuNPs为18倍。一阶超极化率的增加支持I7C+AgNPs和I7C+AuNPs非线性光学特性的增强。此外，实验得到的光学限制阈值的降低和非线性吸收系数的增加反映了I7C+AgNPs和I7C+AuNPs的非线性光学早期衰减和光学限制活性的增强。

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来源期刊

Photonics and Nanostructures-Fundamentals and Applications 工程技术-材料科学：综合

CiteScore

5.00

自引率

3.70%

发文量

审稿时长

62 days

期刊介绍： This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.