NIRT: Electrodeposition of Nanostructured Multilayers

本提案是应“纳米科学与工程”(NSF 01-157)NIRT类别的征集而提交的。开发用于微电子机械系统(MEMS)的新型电沉积纳米结构多层合金。将制造高灵敏度的磁性传感器和用于微切削工具和模具的硬质材料。成分调制多层合金提供了各种改进的性能，包括增强的薄膜磁性传感器的巨磁电阻，以及高纵横比微器件组件的更高硬度，与它们的粗略微结构相比较。预计这些层的纳米特征将有助于物理性能和微观结构的变化。电化学处理将被用来制备具有脉冲波形的薄和厚纳米材料。将测试磁性、电子和机械性能，包括电阻率、磁阻、DC/AC磁化和磁化率，以及硬度。路易斯安那州立大学/CAMD、阿贡和布鲁克海文国家实验室的研究人员将在国家实验室的学生参与下，共同致力于电沉积纳米层合金的表征。通过参与妇女工程师协会和全国黑人化学家和化学工程师专业促进组织，将开展学生外联活动。所提出的电沉积技术有可能显著提高多层纳米结构的质量，特别是那些具有弯曲和凹陷衬底的多层纳米结构。

This proposal was submitted in response to the solicitation "Nanoscale Science and Engineering" (NSF 01-157), category NIRT. Novel electrodeposited nanostructured multilayered alloys for microelectromechanical systems (MEMS) will be developed. High sensitivity magnetic sensors and hard materials for micro-cutting tools and molds will be fabricated. Compositionally modulated multilayered alloys offer a variety of improved properties including enhanced giant magnetoresistance for thin film magnetic sensors, and superior hardness for high aspect ratio microdevice components, compared to their coarser microstructural counterparts. It is expected that the nanometric feature of the layers will contribute to a change in the physical properties and microstructure. Electrochemical processing will be used to fabricate both thin and thick nanomaterials with pulsed waveforms. Magnetic, electronic and mechanical properties will be examined, including electrical resistivity, magnetoresistivity, DC/AC magnetization and susceptibility, and hardness.Investigators at LSU/CAMD, Argonne and Brookhaven National Labs will worktogether towards characterization of the electrodeposited nanolayered alloys with studentinvolvement at the national labs. Student outreach will be conducted through PI participation in the Society of Women Engineers and the National Organization for the Professional Advancement of Black Chemists and Chemical Engineers. The proposed electrodeposition techniques have the potential to significantly improve the quality of multilayered nanostructures, especially those with curved and recessed substrates.