Mansoor Farukh, Ju Huangxian, Saeed Madiha, Kanwal Shamsa
Key Laboratory of Magnetic Materials and Devices & Division of Functional Materials and Nanodevices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences Ningbo 315201 P. R. China.
Department of Chemistry, Khwaja Fareed University of Engineering and Information Technology Abu Dhabi Road Rahim Yar Khan Pakistan
RSC Adv. 2023 Oct 27;13(45):31366-31374. doi: 10.1039/d3ra06344e. eCollection 2023 Oct 26.
Silver (Ag) nanomaterials featuring a cubic shape particularly represent supreme class of advance nanomaterials. This work explored a new precursor and its effect on morphological features of silver (Ag) nanocubes (NCs) serving as sacrificial templates for facile synthesis of gold NCs. The AgNCs were initially prepared utilizing sodium thiosulphate (NaSO) as relatively stable S producing species along with a soft etchant source KCl. The effects of different potassium halides were evaluated to grasp control over seed mediated growth of Ag nanocubes. Taking the advantages of dual metallic properties, Ag@4MBA@AuNCs nanostructure was synthesized using 4-mercaptobenzoic acid (4MBA) as a Raman reporter molecule. This nanostructure showed 10-times enhancement in surface enhanced Raman scattering (SERS) signal, leading to a highly sensitive imaging probe for the detection of even three breast cancer cells (MCF-7 cells) . Subsequently, the oxidative nanopeeling well accompanied by incorporation of Au/Ag alloy nanoparticles on AuNCs corona assembly was achieved, which facilitated the catalytic reduction of toxic nitrophenol to eco-friendly aminophenol. Such sophisticated and engineered nanoassemblies possess broad applications in bioanalysis.
具有立方形状的银（Ag）纳米材料尤其代表了先进纳米材料的最高级别。这项工作探索了一种新的前驱体及其对银（Ag）纳米立方体（NCs）形态特征的影响，这些纳米立方体用作简便合成金纳米立方体的牺牲模板。最初利用硫代硫酸钠（NaSO）作为相对稳定的硫生成物质以及软蚀刻剂源氯化钾来制备银纳米立方体。评估了不同卤化钾的影响，以掌握对银纳米立方体种子介导生长的控制。利用双金属特性的优势，使用4-巯基苯甲酸（4MBA）作为拉曼报告分子合成了Ag@4MBA@AuNCs纳米结构。这种纳米结构在表面增强拉曼散射（SERS）信号方面显示出10倍的增强，从而形成了一种高度灵敏的成像探针，甚至可用于检测三个乳腺癌细胞（MCF-7细胞）。随后，实现了氧化纳米剥离，同时在金纳米立方体冠层组装体上掺入了金/银合金纳米颗粒，这促进了有毒硝基苯酚催化还原为环保型氨基酚。这种复杂且经过工程设计的纳米组装体在生物分析中具有广泛的应用。
