SBIR Phase I: Efficient Production of High Quality Carbon Nanotube Field Emitters

SBIR第一阶段：高效生产高质量碳纳米管场发射器

• 批准号: 0740414
• 负责人: Mei Lu
• 金额: --
• 依托单位: Xintek, Inc.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0740414&HistoricalAwards=false
• 关键词: SBIR; Phase; Efficient; Production; Quality

This SBIR Phase I project is aimed at demonstrating the feasibility and synthesis of carbon nanotubes (CNTs) containing few walls, as opposed to the single- and multi-wall CNTs available in the market today. CNT-based field emission devices require high quality CNTs to improve emission uniformity, current density, emission stability and lifetime. The current commercially available CNTs have limitations in terms of cost, poor field emission properties, and thermal stability. The company, in collaboraion with Duke University, discovered a proprietary method for growing few-walled CNTs (FECNTs), which show promising field emission performace compared to other commercially available CNTs. In this project, the company will (a) modify the chemical vapor deposition (CVD) system to improve the safety and efficiency of the process, investigage the effects of catalyst composition and CVD conditions on the structure and morphology of the FWCNTs produced and enhance the adhesion between the CNTs and the matrix materials in the FWCNT cathode films.The broader impacts of this technology will be in improved field emission devices with enhanced current densities, which will significantly enhance the performance of X-ray tubes and field-emission displays. This will have a significant positive impact on the manufacture of more efficient X-ray equipment used in medical applications and advanced research. The field emission display market will benefit greatly from having brighter, more stable and longer lasting displays, used in a variety of applications, including entertainment, HDTVs, handheld devices, etc.

该SBIR第一阶段项目旨在展示含有少量壁的碳纳米管（CNT）的可行性和合成，而不是当今市场上的单壁和多壁CNT。基于CNT的场发射器件需要高质量的CNT以改善发射均匀性、电流密度、发射稳定性和寿命。目前市售的CNT在成本、差的场发射性质和热稳定性方面具有限制。该公司与杜克大学合作，发现了一种生长少壁碳纳米管（FECNTs）的专有方法，与其他市售碳纳米管相比，FECNTs显示出良好的场发射性能。在该项目中，该公司将（a）修改化学气相沉积（CVD）系统，以提高工艺的安全性和效率，研究了催化剂组成和CVD条件对FWCNT结构和形貌的影响，并增强了FWCNT阴极薄膜中CNT与基体材料之间的粘附力。增强的电流密度，这将大大提高X射线管和场发射显示器的性能。这将对制造用于医疗应用和先进研究的更高效的X射线设备产生重大的积极影响。场发射显示器市场将大大受益于具有更亮、更稳定和更持久的显示器，用于各种应用，包括娱乐、HDTV、手持设备等。