Ion beam modifications of plasmonic PET flexible SERS substrates using a table top accelerator

IF 1.4 3区 物理与天体物理 Q3 INSTRUMENTS & INSTRUMENTATION
Akanksha Motla , Raj Kumar , Rajendra Singh , Venugopal Rao Soma , D.K. Avasthi , S. Annapoorni
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Abstract

Ion beam modification induces significant surface alterations that are crucial for applications in Surface Enhanced Raman Spectroscopy (SERS). SERS, a highly sensitive analytical technique, amplifies weak Raman signals by increasing the effective Raman cross-section of target analytes. This study investigates the development of SERS substrates using ion beam-based surface modification on flexible polymer substrates. Gold (Au) thin films were thermally evaporated onto Polyethylene Terephthalate (PET) sheets and subsequently irradiated with 10 keV Ar+ ions at fluences of 1 × 1015, 3 × 1015, 1 × 1016, and 3 × 1016 ions/cm2. The morphological changes in the films were characterized via Field Emission Scanning Electron Microscopy (FESEM). Both untreated and ion-irradiated films were assessed as SERS substrates for detecting Rhodamine B (RhB) dye at micro-molar (μM) and nano-molar (nM) concentrations. The findings emphasize the potential of ion-irradiated flexible polymer substrates in SERS applications. They demonstrate the crucial importance of surface engineering in improving the deposition of noble metals on the polymer surface, leading to enhanced sensing performance.
离子束修饰等离子体PET柔性SERS衬底的桌面加速器
离子束修饰引起显著的表面改变,这对表面增强拉曼光谱(SERS)的应用至关重要。SERS是一种高灵敏度的分析技术,通过增加目标分析物的有效拉曼截面来放大弱拉曼信号。本文研究了基于离子束的柔性聚合物基板表面改性技术在SERS基板上的应用。将金(Au)薄膜热蒸发到聚对苯二甲酸乙二醇酯(PET)薄片上,然后用10 keV的Ar+离子在1 × 1015、3 × 1015、1 × 1016和3 × 1016离子/cm2的影响下照射。通过场发射扫描电镜(FESEM)对膜的形态变化进行了表征。在微摩尔(μM)和纳米摩尔(nM)浓度下检测罗丹明B (RhB)染料,对未经处理和离子辐照的薄膜作为SERS底物进行了评估。这些发现强调了离子辐照柔性聚合物衬底在SERS应用中的潜力。他们证明了表面工程在改善贵金属在聚合物表面沉积方面的关键重要性,从而提高了传感性能。
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来源期刊
CiteScore
2.80
自引率
7.70%
发文量
231
审稿时长
1.9 months
期刊介绍: Section B of Nuclear Instruments and Methods in Physics Research covers all aspects of the interaction of energetic beams with atoms, molecules and aggregate forms of matter. This includes ion beam analysis and ion beam modification of materials as well as basic data of importance for these studies. Topics of general interest include: atomic collisions in solids, particle channelling, all aspects of collision cascades, the modification of materials by energetic beams, ion implantation, irradiation - induced changes in materials, the physics and chemistry of beam interactions and the analysis of materials by all forms of energetic radiation. Modification by ion, laser and electron beams for the study of electronic materials, metals, ceramics, insulators, polymers and other important and new materials systems are included. Related studies, such as the application of ion beam analysis to biological, archaeological and geological samples as well as applications to solve problems in planetary science are also welcome. Energetic beams of interest include atomic and molecular ions, neutrons, positrons and muons, plasmas directed at surfaces, electron and photon beams, including laser treated surfaces and studies of solids by photon radiation from rotating anodes, synchrotrons, etc. In addition, the interaction between various forms of radiation and radiation-induced deposition processes are relevant.
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