Investigations on effects of Cd doping on the structural, morphological, linear and third order nonlinear optical properties of CuS-PMMA nanocomposites thin films

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-09-22 DOI:10.1016/j.optmat.2025.117545

P.P. Gedam , Y.S. Tamgadge , G.G. Muley , R.P. Ganorkar , R.Y. Bakale , S.V. Khangar

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Abstract

We report the synthesis of undoped and Cd doped CuS nanoparticles (NPs) using l-alanine as a surface passivating agent via simple co-precipitation method. Powder samples of CuS NPs and thin films of poly (methyl methacrylate) (PMMA)-CuS NPs, prepared by spin coating on glass substrate, were investigated for their structural, morphological, linear and nonlinear optical (NLO) properties. Powder X-ray diffraction confirmed the formation of covellite CuS with average crystallite size of 5–20 nm. Energy dispersive X-ray spectroscopy (EDS) validated the sample purity, while high-resolution transmission electron microscopy (HR-TEM) revealed uniform morphology of NPs. Linear optical studies using ultraviolet–visible (UV–vis) absorption spectroscopy showed localized surface plasmon resonance (LSPR) in the wavelength range 600–680 nm. A pronounced blue shift in the absorption wavelength and an optical band gap up to 2.28 eV was observed for 1 wt% Cd doped CuS NPs. Thin film samples (undoped and Cd-doped) were further characterized by z-scan technique, which revealed thermally stimulated third-order NLO effects in Cd doped CuS-PMMA nanocomposite thin films, attributed to non-local thermal contributions from surface states, dielectric effects, and photoacoustic interactions.

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镉掺杂对cu - pmma纳米复合薄膜结构、形态、线性和三阶非线性光学性能影响的研究

本文报道了以l-丙氨酸为表面钝化剂，采用简单共沉淀法合成未掺杂和掺杂Cd的cu纳米粒子（NPs）。研究了在玻璃基板上自旋镀膜制备的cu NPs粉末样品和聚甲基丙烯酸甲酯(PMMA)- cu NPs薄膜的结构、形态、线性和非线性光学（NLO）性能。粉末x射线衍射证实形成了平均晶粒尺寸为5 ~ 20 nm的covelite cu。能量色散x射线光谱（EDS）验证了样品的纯度，高分辨率透射电子显微镜（HR-TEM）显示了NPs的均匀形貌。利用紫外-可见吸收光谱进行线性光学研究，发现在600 ~ 680 nm波长范围内存在局部表面等离子体共振（LSPR）。对于掺杂1 wt% Cd的cu NPs，观察到吸收波长的明显蓝移和高达2.28 eV的光学带隙。通过z扫描技术进一步表征了薄膜样品（未掺杂和掺杂Cd），发现Cd掺杂cu - pmma纳米复合薄膜中的三阶NLO效应归因于表面态、介电效应和光声相互作用的非局部热贡献。

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

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.