Advanced 3D Nanonetwork Materials Induced by Ultrashort Plasma Ionization

先进纳米纤维是制造业和纳米技术产业的热点。与其他方法相比，使用超短激光脉冲的纳米纤维具有独特的优势。它是单步的，可以应用于各种材料。我提出的研究计划将集中在一种新型的超短激光烧蚀技术，该技术能够制备具有可控光学和化学敏感性以及增强生物相容性的3D纳米网络结构。制造的结构将立即用于不同的应用，如超级电容器和电池电极，光子器件，纳米传感器和生物功能材料制造。 脉冲激光烧蚀加工传统上用于加工和材料去除在微米和亚微米尺度;由于其效率低，但是，它很少用于纳米材料合成。基于激光的纳米材料合成通常采用高功率连续激光器和纳秒激光器，并且需要催化剂和受控环境。然而，在兆赫激光脉冲频率下，连续脉冲之间的延迟时间与成核的临界时间相当，这使得在不添加催化剂的情况下在环境条件下形成纳米结构成为可能。 我的建议的主要目标是激光3D纳米网络（纳米线，纳米纤维结构）生成。我打算在MHz脉冲频率范围内扩展我对超短激光与物质相互作用的基本原理和3D纳米网络形成机制的研究。我的目标是利用我所获得的知识开发成本效益和可控的工艺，用于更大规模地合成纳米材料和3D纳米结构表面。这包括研究激光参数，环境和外场对各种纳米材料形成的影响，如纳米棒，纳米尖端和纳米纤维。预期成果：这项资助支持的研究将旨在了解纳米纤维中的高频/高强度脉冲电离机制，并开发具有成本效益和可控的工艺，用于更大规模地合成先进的传感材料，能源纳米材料和生物材料制造。这包括研究激光参数，环境和外场对各种纳米材料形成及其性能的影响，用于从先进传感结构到储能设备和生物材料制造的不同应用。根据该计划培训的人员将获得纳米纤维和材料表征方面的宝贵技能，这将使他们适合加拿大不断扩大的先进制造业和生物技术领域的职业生涯。

Advanced nanofabrication is a hotspot in the manufacturing and nanotechnology industries. Nanofabrication using ultrashort laser pulses offers unique advantages over other approaches. It is single-step and can be applied to a wide range of materials. My proposed research program will focus on a novel ultrashort laser ablation technique that is capable of preparing 3D nano-network structures with controlled optical and chemical sensitivity and enhanced biocompatibility. The fabricated structures will be immediately usable in different applications such as super capacitor and battery electrodes, photonic devices, nano-sensors and bio-functional material fabrication. Pulsed laser ablative machining has traditionally been used for machining and material removal at micro- and sub-micro scales; due to its low efficiency, however, it is rarely used for nanomaterial synthesis. Laser-based nanomaterial synthesis normally employs high-powered continuous lasers and nanosecond lasers, and requires catalysts and a controlled environment. At megahertz laser-pulse frequency, however, the delay time between successive pulses is comparable to the critical time of nucleation, which enables the formation of nanostructures in ambient conditions without the addition of a catalyst. The main objective of my proposal is Laser 3D Nanonetwork (nanowires, nanofibrous structured) generation. I intend to extend my research on the fundamentals of ultrashort-laser-matter interaction at the MHz-pulse frequency range and the mechanisms of 3D nanonetwork formation. My goal is to use the knowledge I acquire to develop cost-efficient and controllable processes for synthesizing nanomaterials and 3D nanostructured surfaces on a larger scale. This includes the study of the effects of laser parameters, environments and external fields on the formation of various nanomaterials, such as nanorods, nanotips, and nanofibres. Anticipated outcomes: The research supported by this grant will be aimed at developing an understanding of high frequency/high intensity pulse ionization mechanism in nanofabrication and develop cost-efficient and controllable processes for synthesizing advanced sensing materials, energy nanomaterials and biomaterials fabrications at a larger scale. This includes the study of the effects of laser parameters, environments, and external fields on the formation of various nanomaterials and their properties for different applications from advanced sensing structures to energy storage devices and biomaterials fabrication. The personnel trained under this program will acquire a valuable skillset in nanofabrication and materials characterization that will make them suitable for careers in Canada's expanding advanced manufacturing and biotech sectors.