Photo induced Force Microscopy (PiFM): Nanoscale Topography and Vibrational Spectroscopy

光诱导力显微镜 (PiFM)：纳米级形貌和振动光谱

• 批准号: EP/V05399X/1
• 负责人: Philip Davies
• 金额: $ 129.19万
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FV05399X%2F1
• 关键词: Photo; induced; Force; Microscopy; PiFM

Virtually every aspect of our everyday lives, from friction to adhesion, from LED lighting to display screens, and from corrosion to drug delivery through cell walls, depends upon the interface between the outer layer of a solid and the environment. We know the "outer layer" that governs the interactions between a solid and a gas, liquid, or solid, is usually less than a couple of nanometers (nm) thick and often as little as the very outermost layer of atoms or molecules. This means that there is simply very little surface material there to see, in a 1 cm cube of solid for example, only 1 atom in 100 million is at the surface. That makes studying these interfaces very difficult. Surface science has developed many different techniques capable of examining the outer layer of atoms, but there remain considerable gaps in our knowledge. In particular, we cannot see how the molecular composition changes at very small scales (i.e. < 1000th of a mm) although we do know that such local differences are critical to the behaviour of most interfaces. We can obtain an idea of the molecular constituents of the surface as an average over areas of a few millimeters from bouncing light off the surface, but this approach cannot be used at the smallest scales needed. In the last 30 years, scanning probe microscopy such as atomic force microscopy (AFM) have revolutionized our understanding of the topography of interfaces; it is now routinely possible to resolve the shape of features as small as a few nm and to study how such local structures affect the behaviour of the interface. The shape is only part of the story however, the local chemical composition and electron interactions are crucial too. With this proposal, we will establish a facility for UK researchers that is capable of determining the topography, local molecular composition and local electronic interactions simultaneously with <10 nm lateral resolution. The technique is called Photo-induced Force Microscopy (PiFM) and can provide a full infrared (IR) spectrum at every point on an AFM map. Infrared spectroscopy is a standard tool used by chemists to identify molecular species (a version of IR was used to identify the presence of methane on Mars for example, and more controversially the possible presence of phosphine in the atmosphere of Venus). The combination of infrared spectroscopy with atomic force microscopy at such high resolution will provide a new and very important insight into areas of science as diverse as antibacterial coatings on surfaces, quantum nanocrystals for lighting and display, materials for medical implants, catalysts for water purification and the cause of defects or failure in the coatings applied to electrical steels. Understanding these processes will help researchers develop more resilient and sustainable materials with better performance.

实际上，从摩擦到粘附，从LED照明到展示屏幕，从腐蚀到通过细胞壁输送到药物，几乎都取决于固体和环境的外层之间的接口。我们知道控制固体和气体，液体或固体之间相互作用的“外层”通常小于几个纳米（nm）厚，并且通常比原子或分子最外层的层少。这意味着那里的表面材料很少，例如，在1 cm的固体立方体中，表面上只有1亿个原子。这使得研究这些界面非常困难。 Surface Science开发了许多不同的技术，能够检查原子的外层，但是我们的知识仍然存在很大的差距。特别是，我们看不到分子组成在很小的尺度上（即<mm的<1000）如何变化，尽管我们确实知道这种局部差异对大多数接口的行为至关重要。我们可以从表面的平均区域中获得表面的分子成分的想法，这是从表面弹跳的几毫米的平均区域，但是这种方法无法在所需的最小尺度上使用。在过去的30年中，扫描探针显微镜（例如原子力显微镜（AFM））彻底改变了我们对接口地形的理解。现在，通常可以解决小至几个nm的特征的形状，并研究这种局部结构如何影响界面的行为。形状只是故事的一部分，但是，局部化学成分和电子相互作用也至关重要。通过此提案，我们将为英国研究人员建立一个设施，该设施能够确定地形，局部分子组成和局部电子相互作用，同时及其横向分辨率<10 nm。该技术称为光诱导的力显微镜（PIFM），可以在AFM地图上的每个点提供完整的红外（IR）频谱。红外光谱法是化学家用于鉴定分子物种的标准工具（例如，IR版本用于鉴定火星上的甲烷存在，更具争议性的是在金星大气中可能存在磷酸）。在如此高分辨率下，红外光谱与原子力显微镜的结合将为您提供对科学领域的新且非常重要的见解施加到电钢的涂料中缺陷或故障的原因。了解这些过程将有助于研究人员以更好的性能开发更多的弹性和可持续材料。

项目成果

Photoinduced force microscopy as a novel method for the study of microbial nanostructures.

光诱导力显微镜作为研究微生物纳米结构的新方法。

• DOI: 10.1039/d3nr03499b
• 发表时间: 2023
• 期刊: Nanoscale
• 影响因子: 6.7
• 作者: Davies-Jones J

PiFM and XPS Studies of Porous TiO2 Films for the Photocatalytic Decomposition of Polystyrene

多孔 TiO2 薄膜光催化分解聚苯乙烯的 PiFM 和 XPS 研究

• DOI: 10.3390/catal13040725
• 发表时间: 2023
• 期刊: Catalysts
• 影响因子: 3.9
• 作者: Court-Wallace C

Photo induced force microscopy: chemical spectroscopy beyond the diffraction limit

• DOI: 10.1039/d2qm00040g
• 发表时间: 2022-04-05
• 期刊: MATERIALS CHEMISTRY FRONTIERS
• 影响因子: 7
• 作者: Davies-Jones, Josh A.;Davies, Philip R.
• 通讯作者: Davies, Philip R.