NER: Selective Growth of Nanoparticles at Exposed Carbon Nanotube Tips

NER：纳米颗粒在暴露的碳纳米管尖端的选择性生长

• 批准号: 0508096
• 负责人: Konstantinos Giapis
• 金额: $ 10万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-15 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0508096&HistoricalAwards=false
• 关键词: NER; Selective; Growth; Nanoparticles; Exposed

NER-Proposal #0508096: Abstract The objective of this research is to grow nanoparticles directly on carbon nanotube tips for improved nanoelectrodes and novel self-assembly strategies. The approach consists in coating individual carbon nanotubes with a chemically inert sheath, then exposing the nanotube tip. Selective growth of a particle at the tip will follow utilizing gaseous precursors with enhanced reactivity towards carbon. The intimate tube-particle contact allows the particle to be used for sensing at the nanoscale when the nanotube is integrated on a scanning probe. The particle offers a larger area for the attachment of functional "sensing" molecules to increase sensitivity and allows chemistries, other than carbon-based, to be explored for anchoring. Functionalized nanoelectrodes can trigger and probe signaling pathways in cells or in electrophysiological fluids. Massive fabrication of nanotube-nanoparticle half-dumbbells bears promise for self-assembly at the nanoscale utilizing magnetic and/or hydrophobic-hydrophilic interactions. Such assemblies may lead to new functionalities and materials properties. The broader impact of the proposed research emerges from the ability to image and manipulate matter at the nanoscale. Nanoelectrodes can help improve understanding of signaling in biosystems ultimately connected with life and health. More sensitive nanoelectrodes can help detect more efficiently minute amounts of toxic or polluting chemicals of environmental importance. Nanotube-nanoparticle dumbbells will provide new building blocks for assembling new materials with improved structural, magnetic, electronic, and photonic properties. Nanotubes coupled to silicon quantum dots may increase the efficiency of solar energy conversion. Finally, nanotube-nanoparticle probes offer a new tool for exploring nanoscale systems.

摘要本研究的目的是直接在碳纳米管尖端生长纳米颗粒，以改进纳米电极和新的自组装策略。该方法包括在单个碳纳米管上涂上化学惰性护套，然后暴露纳米管尖端。粒子在尖端的选择性生长将遵循利用对碳具有增强反应性的气态前体。当纳米管集成在扫描探针上时，这种紧密的管-粒子接触允许粒子用于纳米级的传感。这种粒子为功能性“传感”分子的附着提供了更大的面积，以提高灵敏度，并允许探索除碳基以外的化学物质用于锚定。功能化纳米电极可以触发和探测细胞或电生理液体中的信号通路。纳米管-纳米颗粒半哑铃的大规模制造有望在纳米尺度上利用磁性和/或疏水-亲水性相互作用进行自组装。这样的组装可能会产生新的功能和材料特性。这项提议的研究的更广泛的影响来自于在纳米尺度上成像和操纵物质的能力。纳米电极可以帮助提高对生物系统中与生命和健康最终相关的信号的理解。更灵敏的纳米电极可以帮助更有效地检测对环境有重要影响的微量有毒或污染化学物质。纳米管-纳米颗粒哑铃将为组装具有改进结构、磁性、电子和光子特性的新材料提供新的基石。纳米管与硅量子点耦合可以提高太阳能转换效率。最后，纳米管-纳米颗粒探针为探索纳米尺度系统提供了一种新的工具。