Ma Hong, Zin Melvin T, Zareie M Hadi, Kang Mun-Sik, Kang Seok-Ho, Kim Kyoung-Soo, Reed Bryan W, Behar Candan Tamerler, Sarikaya Mehmet, Jen Alex K Y
Department of Materials Science and Engineering, University of Washington, Box 352120, Seattle, Washington 98195, USA.
J Nanosci Nanotechnol. 2007 Aug;7(8):2549-66. doi: 10.1166/jnn.2007.615.
Synthesis and processing techniques have now been established for obtaining high quality monodisperse nanocrystals of various metallic and semiconducting materials, fullerenes of distinct properties, single- and multi-wall carbon nanotubes, polymeric dendrimers with tailored functionalities, as well as other nanophase constructs. The next key step towards novel applications of nanostructured materials concerns their positioning, arrangement, and connection into functional networks without mutual aggregation. In this review, we highlight the recent progress of using anthracene- and pyrene-based self-assembling molecules with tunable energetic (pi-pi interactions, hydrogen bonding, dipole-dipole interactions) and variable geometries to create stable, highly ordered, and rigid self-assembled monolayer (SAM) templates with adjustable superlattices on crystalline substrates. Based on aromatic SAM templates, stable and highly ordered self-assembled structures of optoelectronically active C60 have been obtained and shown to exhibit desirable electrical and optoelectronic properties, such as nonlinear transporting effect for molecular electronics and efficient photocurrent generation for mimicking photosynthesis in nature. By using genetically engineered polypeptides with surface recognition for specific inorganics, selective integration of nanoparticles onto aromatic SAM templates have also been realized. Through a combination of spatially confined surface chemical reaction and microcontact printing, sub-micron arrays of peptide-organic hybrid conjugates were successfully generated to serve as templates to achieve the patterned assembly of nanoparticles.
目前已经建立了合成和加工技术，用于获得各种金属和半导体材料的高质量单分散纳米晶体、具有独特性质的富勒烯、单壁和多壁碳纳米管、具有定制功能的聚合物树枝状大分子以及其他纳米相结构。纳米结构材料新应用的下一个关键步骤涉及它们在不相互聚集的情况下定位、排列并连接成功能网络。在这篇综述中，我们重点介绍了使用基于蒽和芘的自组装分子的最新进展，这些分子具有可调谐的能量（π-π相互作用、氢键、偶极-偶极相互作用）和可变几何形状，以在晶体衬底上创建具有可调超晶格的稳定、高度有序且刚性的自组装单层（SAM）模板。基于芳香族SAM模板，已经获得了光电子活性C60的稳定且高度有序的自组装结构，并显示出具有理想的电学和光电子性质，例如分子电子学中的非线性传输效应以及模拟自然界光合作用的高效光电流产生。通过使用对特定无机物具有表面识别能力的基因工程多肽，还实现了纳米颗粒在芳香族SAM模板上的选择性整合。通过空间受限表面化学反应和微接触印刷相结合，成功生成了肽-有机杂化共轭物的亚微米阵列，用作模板以实现纳米颗粒的图案化组装。
