Bioconjugation and self-assembly of carbon nanotubes

描述（由申请人提供）：本提案描述了碳纳米管（CNTs）的有效和可控的生物偶联和自组装方法。本研究将重点发展温和的化学方法，将生物分子（核酸、蛋白质、碳水化合物等）和具有增溶性的小分子共价附着在碳纳米管上，并将其自组装成新的杂化材料。这些dna -碳纳米管混合材料将被表征，并探索其分子识别特性，用于电化学或基于场效应晶体管的生物传感器。该提案的第一个目标是发展碳纳米管与生物分子（DMA）功能化的方法。该提案的第二个目标是发展新的基于dma的碳纳米管组装技术。最后的目的是研究这些新材料与蛋白质和小分子的酶修饰和分子识别特性，为其作为高灵敏度生物传感器系统的应用铺平道路。装配DMA材料的三种主要架构策略是线性、分支和多分支的高阶主题。线性策略在概念上是最简单的，最近已应用于金纳米颗粒的自组装成高度有序的晶体阵列。虽然这种策略已经在金纳米颗粒上得到了证明，但dna -碳纳米管材料的自组装，具有高度的有序性，尚未实现，并且代表了一个非常需要的研究领域。成功地将dna -碳纳米管偶联物自组装成高度有序的材料将是该领域的重大进展，也是本研究的主要目标。新型生物材料的发现和对其基本特性的详细了解可能导致在人类健康和医学方面的实际应用。dna -碳纳米管杂化材料有许多潜在的应用，其中一些包括细胞生长或组织再生的底物，药物传递系统，基因转染试剂，纳米管（非病毒）介导的siRNA的低核苷酸转运，以及电化学或基于场效应晶体管的生物传感器。

DESCRIPTION (provided by applicant): This proposal describes methods for the efficient and controlled bioconjugation and self-assembly of carbon nanotubes (CNTs). The proposed research will focus on the development of mild chemical methods for the covalent attachment of biomolecules (nucleic acids, proteins, carbohydrates, etc.) and small molecules with solubilizing properties to carbon nanotubes and their self-assembly into new hybrid materials. These hybrid DNA-CNT materials will be characterized and their molecular recognition properties explored for use as electrochemical or field-effect-transistor based biosensors. The first aim of the proposal is the development of methods for the functionalization of carbon nanotubes with biomolecules (DMA). The second aim of the proposal is the development of new DMA-based carbon nanotube assembly techniques. The last aim is to study the enzymatic modification and molecular recognition properties of these new materials with proteins and small molecules, paving the way toward their application as highly sensitive biosensor systems. The three primary architectural strategies for assembling DMA materials are linear, branching, and multibranched higher order motifs. The linear strategy is the simplest conceptually, and has been applied recently to the self-assembly of gold nanoparticles into highly ordered crystalline arrays. While this strategy has been demonstrated for gold nanoparticles, the self assembly of DNA-carbon nanotube materials, with high degrees of order, has yet to be achieved and represents a much needed area of research. The successful self-assembly of DNA-carbon nanotube conjugates into highly ordered materials would constitute a major advance in the field and is the principle goal of the proposed research. The discovery of novel biomaterials and detailed knowledge of their fundamental properties could lead to practical applications in human health and medicine. DNA-CNT hybrid materials have many potential applications some of which include substrates for cell growth or tissue regeneration, drug delivery systems, gene transfection reagents, nanotube (non-viral) mediated oligonucleotide transport for siRNA, and electrochemical or field-effect-transistor based biosensors.