Directed Nanoparticle Assemblies in Thin Films

薄膜中的定向纳米颗粒组件

• 批准号: 1007002
• 负责人: Ting Xu
• 金额: $ 33万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-05-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1007002&HistoricalAwards=false
• 关键词: Directed; Nanoparticle; Assemblies; Thin; Films

TECHNICAL SUMMARY: To generate nanoparticle (NP)-based functional devices that capitalize on the unique characteristics of NPs, it is mandatory to control the macroscopic ordering and orientation of the NP assemblies and the inter-particle ordering with high precision in thin films. Block copolymer (BCP)-based supramolecules provides unique opportunities to address this challenge. The influence of small molecule loading, NP loading, film thickness, interfacial interactions, solvent fields and sample treatments on the thermodynamics and kinetics of hierarchical assemblies in thin films of the NP/BCP-based supramolecule blends will be systematically studied. Approaches will also be developed to tailor the ordering of the small molecules within the BCP microdomains so as to achieve control over inter-particle ordering. The proposed study will transform our existing knowledge of the hierarchical assembly of hybrid materials and enable one to capitalize on the unique properties of the numerous off-shelf NPs. NON-TECHNICAL SUMMARY:The proposed studies will lead to a foundation in understanding the fundamental principles underpinning the hierarchical assembly of multicomponent composite systems, establishing a framework and protocols for the fabrication of nanocomposite materials that will transform approaches for device fabrication in the renewable energy, microelectronics and storage industries. The PI will continue to devote herself to mentoring students and promoting public awareness of materials science. She will take advantage of her prior outreach experiences and expertise and will collaborate closely with existing on-campus outreach programs and local organizations to educate the next generation of material scientist. Her outreach efforts include developing laboratory modules to strengthen two polymer courses initiated by the PI; expanding her existing efforts for career mentoring of postdoctoral fellows and senior graduate students; and promoting polymer science among the younger generation through research opportunities and seminars at local high schools.

技术综述：为了利用纳米颗粒的独特特性来制备基于纳米颗粒的功能器件，必须对纳米颗粒组装的宏观有序和取向以及薄膜中的颗粒间有序进行高精度的控制。基于嵌段共聚物(BCP)的超分子为应对这一挑战提供了独特的机会。系统地研究了小分子负载、NP负载、膜厚、界面相互作用、溶剂场和样品处理对NP/BCP基超分子共混物薄膜中分级组装的热力学和动力学的影响。还将开发方法来调整BCP微域内小分子的有序性，从而实现对颗粒间有序性的控制。这项拟议的研究将改变我们对混合材料分层组装的现有知识，并使人们能够利用众多现成NPs的独特性质。非技术概述：拟议的研究将为理解支持多组分复合材料系统分层组装的基本原则奠定基础，建立纳米复合材料制造的框架和协议，这将改变可再生能源、微电子和存储行业的设备制造方法。国际材料学会将继续致力于指导学生和促进公众对材料科学的认识。她将利用她以前的外展经验和专业知识，并将与现有的校园外展项目和当地组织密切合作，教育下一代材料科学家。她的外展工作包括开发实验室模块，以加强由PI发起的两门聚合物课程；扩大她现有的工作，为博士后研究员和高级研究生提供职业指导；通过在当地高中的研究机会和研讨会，在年轻一代中推广聚合物科学。