金纳米粒子的功函数、静电力显微镜、可调光致发光以及金纳米粒子/罗丹明 6G 纳米复合材料的等离子相互作用

IF 3.3 4区 物理与天体物理 Q2 CHEMISTRY, PHYSICAL
Ishaq Musa, Jamal Ghabboun
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引用次数: 0

摘要

利用扫描探针显微镜(SPM)和光谱技术对金纳米粒子(AuNPs)的功函数和可调光致发光及其与罗丹明6G(R6G)分子的相互作用进行了表征。采用原子力显微镜(AFM)和开尔文探针力显微镜(KPFM)分析了尺寸从 3 纳米到 21 纳米的 AuNPs 的表面粗糙度和功函数。根据开尔文探针力显微镜(KPFM)的测量结果,在各种尺寸的纳米粒子中,AuNPs 的功函数分别约为 5.17 eV、5.14 eV 和 5.13 eV。据观察,较大的 AuNPs 表面粗糙度增加,因而功函数降低。此外,还利用相成像和静电力显微镜(EFM)进一步研究了 AuNPs/R6G 复合材料,揭示了其表面纳米级分布及其电学特性。此外,还研究了基于激发波长的 AuNPs 可调光致发光,结果表明随着激发波长的增加,光致发光会向更高的发射波长转移,峰值强度也会增加。此外,还利用紫外可见吸收和光致发光光谱研究了添加到罗丹明 6G 分子中的 AuNPs 的光学特性,结果表明吸收增强,光致发光减弱。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Work Function, Electrostatic Force Microscopy, Tunable Photoluminescence of Gold Nanoparticles, and Plasmonic Interaction of Gold Nanoparticles/Rhodamine 6G Nanocomposite

Work Function, Electrostatic Force Microscopy, Tunable Photoluminescence of Gold Nanoparticles, and Plasmonic Interaction of Gold Nanoparticles/Rhodamine 6G Nanocomposite

The work function and tunable photoluminescence of gold nanoparticles (AuNPs) and their interaction with Rhodamine 6G (R6G) molecules were characterized using scanning probe microscopy (SPM) and spectroscopy techniques. Atomic Force Microscopy (AFM) and Kelvin Probe Force Microscopy (KPFM) were employed to analyze the surface roughness and work function of AuNPs ranging in size from 3 to 21 nm. According to measurements with Kelvin Probe Force Microscopy (KPFM), the work functions for AuNPs are approximately 5.17 eV, 5.14 eV, and 5.13 eV for the range of sizes of nanoparticles. It was observed that larger AuNPs have increased surface roughness and consequently decreased work function. Additionally, phase imaging and Electrostatic Force Microscopy (EFM) were utilized to further investigate the AuNPs/R6G composites, revealing their surface nanoscale distribution and their electrical properties. In addition, the tunable photoluminescence of AuNPs based on excitation wavelength was studied, showing that as the excitation wavelength increases, the photoluminescence shifts to higher emission wavelengths and the peak intensity increases. Furthermore, UV–visible absorption and photoluminescence spectroscopy were employed to investigate the optical properties of AuNPs added to Rhodamine 6G molecules, revealing an enhancement in absorption and a reduction in photoluminescence.

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来源期刊
Plasmonics
Plasmonics 工程技术-材料科学:综合
CiteScore
5.90
自引率
6.70%
发文量
164
审稿时长
2.1 months
期刊介绍: Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons. Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.
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