Gap-Plasmon-Enhanced High-Spatial-Resolution Imaging by Photothermal-Induced Resonance in the Visible Range.,Nano Letters

当前位置： X-MOL 学术 › Nano Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Gap-Plasmon-Enhanced High-Spatial-Resolution Imaging by Photothermal-Induced Resonance in the Visible Range.
Nano Letters ( IF 9.6 ) Pub Date : 2019-10-30 , DOI: 10.1021/acs.nanolett.9b03844
Jiangtao Zhou ₁ , Anton Smirnov ₁ , Giovanni Dietler ₁ , Sergey K Sekatskii ₁

Affiliation

Chemical characterization at the nanoscale is of significant importance for many applications in physics, analytical chemistry, material science, and biology. Despite the intensive studies in the infrared range, high-spatial-resolution and high-sensitivity imaging for compositional identification in the visible range is rarely exploited. In this work, we present a gap-plasmon-enhanced imaging approach based on photothermal-induced resonance (PTIR) for nanoscale chemical identification. With this approach, we experimentally obtained a high spatial resolution of ∼5 nm for rhodamine nanohill characterization and achieved monolayer sensitivity for mapping the single-layer chlorophyll-a islands with the thickness of only 1.9 nm. We also successfully characterized amyloid fibrils stained with methylene blue dye, indicating that this methodology can be also utilized for identification of the radiation-insensitive macromolecules. We believe that our proposed high-performance visible PTIR system can be used to broaden the applications of nanoscale chemical identification ranging from nanomaterial to life science areas.

中文翻译：

通过可见光范围内的光热诱导共振来增强间隙等离子体激元的高空间分辨率成像。

纳米级的化学表征对于物理学，分析化学，材料科学和生物学中的许多应用具有重要意义。尽管在红外范围内进行了深入研究，但很少利用高空间分辨率和高灵敏度成像来识别可见范围内的成分。在这项工作中，我们提出了一种基于光热诱导共振（PTIR）的缝隙等离子体增强成像方法，用于纳米级化学鉴定。通过这种方法，我们通过实验获得了约5 nm的高空间分辨率，可用于罗丹明纳米丘的表征，并获得了单层灵敏度，可绘制厚度仅为1.9 nm的单层叶绿素-a岛。我们还成功地鉴定了亚甲基蓝染料染色的淀粉样蛋白原纤维，表明该方法也可用于鉴定对辐射不敏感的大分子。我们相信，我们提出的高性能可见光PTIR系统可用于扩展从纳米材料到生命科学领域的纳米级化学鉴定的应用。

更新日期：2019-10-30

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南