Mesoporous Au nanowire for surface enhanced Raman scattering application

IF 2.6 4区材料科学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of Nanoparticle Research Pub Date : 2025-09-02 DOI:10.1007/s11051-025-06427-7

Debadarshini Samantaray, Priyadarshini Ghosh, Anupam Mishra

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Abstract

Porous monometallic/multi-metallic nanowires are widely exploited for catalytic application due to their enhanced surface area. However, engineering mesoporous 1D plasmonic nanostructure still remains challenging due to poor morphology control. Here in we have come up a with simple wet chemical method to obtain mesoporous Au nanowire (MPG) structure, using Te nanowire as sacrificial template. This method provides a phase pure mesoporous nanowire sample with uniform and stable morphology. Raman spectroscopy is carried out using Rhodamine 6G (R6G) dye to study surface-enhanced Raman scattering (SERS) behavior of mesoporous Au nanowire substrate. A significant improvement in the SERS signal is observed compared to bare R6G, which can be attributed to the increased density of hot spots in the mesoporous nanowire. This facile, wet chemical synthesis strategy can be generalized to other noble metal-based plasmonic nanowires which can be explored for various applications including catalysis, sensors, nanodevices and for targeted drug delivery.

Graphical Abstract

Schematic showing synthesis mechanism of MPG nanowires.

Abstract Image

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介孔金纳米线在表面增强拉曼散射中的应用

多孔的单金属/多金属纳米线由于其增强的比表面积而被广泛应用于催化领域。然而，由于形貌控制不佳，工程介孔一维等离子体纳米结构仍然具有挑战性。本文提出了一种以金纳米线为牺牲模板，用简单的湿化学方法制备介孔金纳米线结构的方法。该方法制备了相纯、形貌均匀稳定的介孔纳米线。采用罗丹明6G （R6G）染料进行拉曼光谱研究介孔金纳米线衬底的表面增强拉曼散射（SERS）行为。与裸R6G相比，SERS信号有显著改善，这可归因于介孔纳米线中热点密度的增加。这种简单的湿化学合成策略可以推广到其他贵金属基等离子体纳米线，可以探索各种应用，包括催化，传感器，纳米器件和靶向药物递送。图解：MPG纳米线的合成机理示意图。

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来源期刊

Journal of Nanoparticle Research 工程技术-材料科学：综合

CiteScore

4.40

自引率

4.00%

发文量

198

审稿时长

3.9 months

期刊介绍： The objective of the Journal of Nanoparticle Research is to disseminate knowledge of the physical, chemical and biological phenomena and processes in structures that have at least one lengthscale ranging from molecular to approximately 100 nm (or submicron in some situations), and exhibit improved and novel properties that are a direct result of their small size. Nanoparticle research is a key component of nanoscience, nanoengineering and nanotechnology. The focus of the Journal is on the specific concepts, properties, phenomena, and processes related to particles, tubes, layers, macromolecules, clusters and other finite structures of the nanoscale size range. Synthesis, assembly, transport, reactivity, and stability of such structures are considered. Development of in-situ and ex-situ instrumentation for characterization of nanoparticles and their interfaces should be based on new principles for probing properties and phenomena not well understood at the nanometer scale. Modeling and simulation may include atom-based quantum mechanics; molecular dynamics; single-particle, multi-body and continuum based models; fractals; other methods suitable for modeling particle synthesis, assembling and interaction processes. Realization and application of systems, structures and devices with novel functions obtained via precursor nanoparticles is emphasized. Approaches may include gas-, liquid-, solid-, and vacuum-based processes, size reduction, chemical- and bio-self assembly. Contributions include utilization of nanoparticle systems for enhancing a phenomenon or process and particle assembling into hierarchical structures, as well as formulation and the administration of drugs. Synergistic approaches originating from different disciplines and technologies, and interaction between the research providers and users in this field, are encouraged.