Synthesis and third-order nonlinear optical properties of PEGylated platinum nanoparticles

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-04-19 DOI:10.1016/j.mseb.2025.118331

W. Felicia Aswathy , D.A. Nayana , Bessy Mary Philip , Merin George , Javeesh Alex , S. Lekshmi , E.I. Anila , D. Sajan

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Abstract

PEGylated platinum nanoparticles, which are capped with polyethylene glycol-400, are synthesized through the chemical reduction technique. The sample was comprehensively characterised through UV–visible spectroscopy, X-ray diffraction (XRD) and transmission electron microscopy (TEM). XRD pattern for the sample revealed a face-centered cubic crystalline phase of platinum, with a lattice constant of 3.939 Å. The average particle size, obtained from high-resolution electron microscopy analysis, is 3.73 nm. The third order NLO features were explored through the Z-scan technique, employing a continuous wave regime. The observed phenomena of nonlinear absorption (NLA) and nonlinear refraction (NLR) are attributed to reverse saturable absorption and thermal lens models. NLR index was measured to be in the range of 5.72 × 10⁻¹⁰ cm²/W, while NLA coefficient was found to be in the range of 1.86 × 10⁻⁵ cm/W, highlighting the potential of PEGylated Pt NPs for NLO applications.

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聚乙二醇化铂纳米粒子的合成及其三阶非线性光学性质

通过化学还原技术合成了聚乙二醇化铂纳米颗粒，并以聚乙二醇-400为覆盖层。通过紫外可见光谱、x射线衍射（XRD）和透射电子显微镜（TEM）对样品进行了全面表征。XRD分析表明，样品为面心立方晶，晶格常数为3.939 Å。通过高分辨率电子显微镜分析获得的平均粒径为3.73 nm。采用连续波体制的z -扫描技术探索了三阶NLO特征。观测到的非线性吸收（NLA）和非线性折射（NLR）现象归因于反饱和吸收和热透镜模型。NLR指数在5.72 × 10−10 cm2/W范围内，而NLA系数在1.86 × 10−5 cm/W范围内，突出了聚乙二醇化Pt NPs在NLO应用中的潜力。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.