RUI: Mechanisms of Resonant Infrared Pulsed Laser Ablation and Deposition of Polymers

RUI：共振红外脉冲激光烧蚀和聚合物沉积的机制

• 批准号: 0613837
• 负责人: Daniel Bubb
• 金额: --
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-22 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0613837&HistoricalAwards=false
• 关键词: RUI; Mechanisms; Resonant; Infrared; Pulsed

Polymer thin films are required for a variety of applications in such diverse areas as biomedical engineering, chemical sensing, and organic electronics. Organic electronics are extremely attractive, among other reasons, because they are much lighter than conventional electronics, and require less power and as such represent next generation possibilities. The technique that will be used to deposit films in this study uses high power infrared lasers that efficiently vaporize polymers and will enable unique studies in fields such as organic electronics that are difficult or impossible by other means. For example, many polymers of interest suffer from poor solubility and therefore are difficult to process, while the method in this proposal does not require polymers to be soluble. In this case, the laser material-interaction requires further understanding in order to understand the mechanism of favorable volatilization, and the value of these studies is of general scientific interest. Thin film processing of polymers presents many challenges. The novel approach here uses an infrared laser that is tuned to a vibrational mode in the polymer starting material. This provides a means to efficiently vaporize polymers without chemical alteration and a minimum of bond breaking, and is similar to the established technique of pulsed laser deposition, except that a UV laser is not used because of the intense photochemical interactions of UV photons with organics. We are guided by promising preliminary results, having observed that the efficiency of the process and even the physicochemical properties of the deposited films can depend on the particular vibrational mode that is excited by the laser. Such mode specific behavior with lasers has long been sought.The multidisciplinary nature of these studies naturally facilitates the participation of a wide group of students. Secondary students in Project SEED who are already participating in summer research at Seton Hall will tangentially benefit. Students from the biology, chemistry, and physics department at Seton Hall will be presented with research opportunities that will teach students to cooperate across disciplinary lines and to effectively communicate with each other. Finally, there is an established collaboration in this area of research between Seton Hall University (an RUI institution), Vanderbilt University, and the Naval Research Laboratory, which will present unique opportunities and benefits to all involved.

生物医学工程、化学传感和有机电子等不同领域的各种应用都需要聚合物薄膜。有机电子产品极具吸引力，除其他原因外，因为它们比传统电子产品轻得多，并且需要更少的功率，因此代表了下一代的可能性。本研究中用于沉积薄膜的技术使用高功率红外激光器，可有效汽化聚合物，并将实现有机电子等领域的独特研究，而通过其他方式很难或不可能进行这些研究。 例如，许多感兴趣的聚合物溶解度差，因此难以加工，而该提案中的方法不要求聚合物是可溶的。在这种情况下，需要进一步了解激光材料相互作用，以了解有利挥发的机制，这些研究的价值具有普遍的科学意义。 聚合物的薄膜加工面临许多挑战。 这里的新颖方法使用红外激光，该激光被调谐到聚合物起始材料中的振动模式。这提供了一种有效汽化聚合物而不发生化学变化且键断裂最少的方法，并且类似于现有的脉冲激光沉积技术，只是由于紫外光子与有机物的强烈光化学相互作用而没有使用紫外激光。 我们以有希望的初步结果为指导，观察到工艺的效率甚至沉积薄膜的物理化学性质可能取决于激光激发的特定振动模式。 长期以来，人们一直在寻找激光的这种特定模式行为。这些研究的多学科性质自然促进了广泛的学生群体的参与。 已经参加 Seton Hall 夏季研究的 SEED 项目中学生将从中受益。 来自西顿霍尔大学生物、化学和物理系的学生将获得研究机会，教会学生跨学科合作并有效地相互沟通。 最后，西顿霍尔大学（RUI 机构）、范德比尔特大学和海军研究实验室之间在这一研究领域建立了合作关系，这将为所有参与者带来独特的机会和利益。