NER: High Efficiency Multiphoton Photoreactive Materials Based on Semiconductor Nanoparticles

本研究的目的是开发高效的多光子吸收光反应材料，如双光子吸收聚合光引发剂。该方法是利用半导体纳米颗粒独特的非线性光学性质来捕获多光子光，并将能量或光生电荷输送到引发聚合反应的选定有机物种。智能优点：拟议工作的潜在影响是解决与将半导体纳米颗粒用作光捕获材料在混合无机-有机化学反应光引发剂中的一些基本科学问题。主要的科学成就将是一项新的纳米工程技术的成功展示，该技术从基本的构建块到复杂的“大型纳米结构”的制造。更广泛的影响：这项工作将在现代社会的许多领域产生广泛影响，如创造用于高精度纳米光刻的新型、高效材料，以及开发由组织穿透式激光控制的新型药物输送系统。这种材料将通过降低成本和增强构建块的功能，将纳米制造技术推向消费市场。它还将通过展示纳米结构的多层次设计和智能制造，为一般纳米科学范式做出贡献。所提出的研究也将对教育产生积极的影响。除了为参与该项目的博士后、研究生和本科生提供宝贵的多学科经验外，它还将丰富UCSB的学术课程，使K-12教师能够获得材料合成和表征、现代技术和纳米科学的实践经验，并将其传授给学生

The objective of this research is to develop efficient multi-photon absorption photoreactive materials, such as two-photon absorption polymerization photoinitiators. The approach is to utilize the unique non-linear optical properties of semiconductor nanoparticles for multiphoton light harvesting and funnel the energy or photogenerated charges to selected organic species that initiate polymerization reactions.Intellectual Merit:The potential impact of the proposed work is to address a number of fundamental scientific issues related to the use of semiconductor nanoparticles as light harvesting materials in hybrid inorganic-organic chemical reaction photoinitiators. The main scientific achievement would be a successful demonstration of a novel nanoengineering technology starting from basic building blocks and up to fabrication of complex "large nanostructures."Broader Impact:This work would have a broad impact in many areas of modern society such as the creation of novel, efficient materials for high precision nanolithography and the development of novel drug delivery systems controlled by a tissue-penetrating laser beam. Such materials will push nanofabrication technologies toward consumer market by reducing the cost and enhancing the functionality of building blocks. It will also contribute to general nanoscience paradigms by demonstration of multi-level design and intelligent fabrication of nanostructures. The research proposed will also have a positive impact on the education. Besides providing invaluable multidisciplinary experience for the postdocs, graduate, and undergraduate students involved into the project, it will enrich academic curriculum at UCSB, enable K-12 teachers to gain hands-on experience in materials synthesis and characterization, modern technology, and nanoscience and pass it to students