Design and Construction of Responsive Surfaces by Means of Tethered Chain Nanolayers

利用系链纳米层设计和构建响应表面

• 批准号: 0650760
• 负责人: Lynn Penn
• 金额: $ 4.05万
• 依托单位: Drexel University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-31 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0650760&HistoricalAwards=false
• 关键词: Design; Construction; Responsive; Surfaces; Means

Lynn S. Penn, Et al, University of Kentucky"Design and Construction of Responsive Surfaces by Means of Tethered Chain Nanolayers"This project explores use of a tethered chain strategy to create surfaces that respond dynamically to their environments or other external stimuli. (A tethered chain is defined as a polymer molecule that is attached by a single point along its length to the surface of a solid.) Tethered chains are uniquely suited for creating responsive surfaces because, except for chain segments adjacent to the point of attachment, their segmental mobility is not impaired. Thus, even though they are attached permanently to the substrate, tethered chains can change conformation-- and thereby change the nature of the surface-- in response to an applied field or alteration in the local environment.Tethered chains of the appropriate chemical structure and molecular architecture, and with specific chemical functionalities attached, can be used to construct surfaces that exhibit a wide variety of responses. Surfaces can be constructed to have dynamic capabilities such as reversible appearance of nanoscale patterns, trapping of hazardous biological or chemical agents, and mimicry of surface energy of contacting phases. Surfaces with these capabilities have applications in electronics manufacture, clean-up of environmental pollution, biomedical devices, adhesive bonding, sensors in scientific instrumentation, adhesion and wetting, and biological and chemical warfare defense.In this project the investigators will gather the remaining experimental data needed to broaden their current mathematical model of the tethering process and make it versatile enough for practical use and will use controlled tethering to construct three demonstration surfaces that exhibit diverse response capabilities. The three demonstration surfaces will be able to 1) exhibit reversible, in-plane phase separation in response to temperature changes, 2) trap large anionic species from a passing stream, and 3) change surface energy to match that of a contacting phase, respectively. Project activities include synthesis of large organic molecules and polymers, execution of tethering procedures under controlled conditions (with real time monitoring), and characterization of structure and function of the surfaces by means of a variety of techniques.Impact: The modification of surfaces with polymers to manipulate nano-surface structure and properties is technologically important on many fronts. This work addresses a critical need. The training provided in these sophisticated techniques will enable research in this important nano-technology to expand. The networking between departments and universities proposed in this proposal is considered to fully utilize the advantages of multidisciplary approaches and inculcates this approach in the formation of the many students involved. If the research is successful, new responsive surfaces will be available for a wide variety of important nano-technological applications which will provide great benefit to society.

肯塔基大学Lynn S. Penn等人“通过束缚链纳米层的设计和构建响应式表面的设计和构建”该项目探讨了使用束缚链策略的使用，以创建对环境或其他外部刺激动态响应的表面。 （一个束缚链被定义为一个聚合物分子，该分子由单个点沿其长度连接到固体表面。）系绳链非常适合创建响应式表面，因为除了靠近附着点的链节段外，其分段迁移率不受影响。因此，即使将它们永久连接到底物上，束带链也可以改变构象 - 从而改变了表面的性质 - 响应当地环境中的施加领域或改变。适当的化学结构和分子结构的固定链，以及附着的特定化学功能，可用于构造表面以构建各种反应。表面可以构造为具有动态功能，例如纳米级模式的可逆外观，危险生物或化学剂的捕获以及模仿接触阶段的表面能量。具有这些功能的表面在电子制造，环境污染的清理，生物医学设备，粘合键合，科学仪器中的传感器，粘附和润湿以及生物和化学战防御中都有应用具有不同响应功能的表面。这三个演示表面将能够1）响应温度变化而表现出可逆的，平面相分离，2）从传递流中捕获大型阴离子物种，3）更改表面能以匹配接触相的表面能。项目活动包括大型有机分子和聚合物的合成，在受控条件下（实时监测）执行绑扎程序，以及通过多种技术来表征表面的结构和功能。影响力：与聚合物的表面进行修饰，以在许多前部对纳米层结构和属性进行技术重要。 这项工作解决了一个迫切的需求。这些复杂的技术中提供的培训将使在这种重要的纳米技术中进行研究，扩大。 该提案中提议的系与大学之间的网络被认为是充分利用多学科方法的优势，并在许多参与的学生的形成中灌输了这种方法。 如果研究成功，那么新的响应曲面将用于各种重要的纳米技术应用，这将为社会带来巨大的好处。