Engineering Optoelectronics and Smart Sensors Leveraging Metal-Organic Framework Materials

利用金属有机框架材料的工程光电和智能传感器

• 批准号: 2763577
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2763577
• 关键词: Engineering; Optoelectronics; Smart; Sensors; Leveraging

A summary of the project:The research is in the field metal-organic framework (MOF) materials, a class of hybrid inorganic-organic compound with tuneable physical and chemical properties. The focus is on the design, fabrication, and engineering of optical sensing materials and their subsequent integration into multifunctional devices for the detection of different stimuli, ranging from chemical vapours to mechanical stresses. The results could yield smart sensors with extreme sensitivity and selectivity targeting real-world applications. This project falls within the EPSRC research areas: Sensors and instrumentation; Photonic materials; Materials engineering - composites.The objectives of the project encompass the following aspects:(i) Implementation of state-of-the-art nanoanalytical techniques to characterise MOF structures. Scattering-type scanning near-field optical microscopy (s SNOM), in combination with nano-Fourier infrared spectroscopy (nanoFTIR), these non-destructive techniques will enable the local scale characterisation of framework structures in both crystalline and amorphous MOF materials.(ii) Identification and probing of structural defects in fine-scale crystalline materials. The aim is for understanding the evolution of crystal growth induced defects, and the elucidation of the mechanical behaviour at the nanoscale. Structure-mechanical property relationships will be established through tip force microscopy, in conjunction with theoretical calculations using density functional methods.(iii) Tuning of photophysical and sensing properties by leveraging the concept of Guest@MOF confinement at the nanoscale. The porous MOF will act as a "host" structure to incarcerate a luminescent "guest" molecule. The resultant "composite" will be studied for surface adsorption effect versus true encapsulation in the MOF pore, addressing a major challenge in the field of Guest@MOF composite materials.The project will be carried out in collaboration with the large science facilities based in Harwell, namely Diamond Light Source (beamline B22 MIRIAM) and ISIS Neutron & Muon Source (TOSCA). In situ synchrotron and neutron vibrational spectroscopy will be applied to track the real-time response of Guest@MOF crystals subject to chemical and physical stimuli when irradiated by a broadband infrared/neutron source. For example, low concentration dosing of acetone will cause host-guest interactions to enable the study of basic sensing mechanisms. Collectively, the findings of this project will help guide the design and engineering of ppm-sensitive sensors for detecting vapours of volatile organic compounds. The results may also benefit the field of optoelectronics for lighting and smart devices.

该研究是在金属有机框架（MOF）材料领域，这是一类具有可调物理和化学性质的混合无机-有机化合物。重点是光学传感材料的设计，制造和工程，以及随后将其集成到多功能设备中，用于检测不同的刺激，从化学蒸汽到机械应力。这些结果可以产生针对现实世界应用的具有极高灵敏度和选择性的智能传感器。该项目福尔斯属于EPSRC的研究领域：传感器和仪器;光子材料;材料工程-复合材料。该项目的目标包括以下几个方面：（一）实施最先进的纳米分析技术，以COMBMOF结构。散射型扫描近场光学显微镜（s SNOM），结合纳米傅立叶红外光谱（nanoFTIR），这些非破坏性的技术将使局部尺度表征的框架结构在晶体和非晶MOF材料。(ii)精细晶体材料中结构缺陷的识别和探测。其目的是为了了解晶体生长引起的缺陷的演变，并阐明在纳米级的机械行为。结构-力学性能的关系将通过尖端力显微镜，结合使用密度泛函方法的理论计算建立。(iii)通过利用纳米级的Guest@MOF限制的概念来调整物理和感测特性。多孔MOF将充当“主体”结构以嵌顿发光“客体”分子。该项目将与位于Harwell的大型科学设施合作进行，即钻石光源（光束线B22 MIRIAM）和ISIS中子和μ子源（TOSCA）。原位同步加速器和中子振动光谱将被应用于跟踪实时响应的访客@MOF晶体受到化学和物理刺激时，由宽带红外/中子源照射。例如，低浓度的丙酮给药将导致主客体相互作用，以使基本的传感机制的研究。总的来说，该项目的研究结果将有助于指导ppm敏感传感器的设计和工程，用于检测挥发性有机化合物的蒸气。研究结果也可能有益于照明和智能设备的光电子领域。