NER: Nanoscale Profiling of the Elastic and Viscoelastic Response of Individual Nanotubes

NER：单个纳米管的弹性和粘弹性响应的纳米级分析

• 批准号: 0303764
• 负责人: Robert Geer
• 金额: $ 9.35万
• 依托单位: SUNY at Albany
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2005-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0303764&HistoricalAwards=false
• 关键词: NER; Nanoscale; Profiling; Elastic; Viscoelastic

TITLE: Nanoscale Profiling of the Elastic and Viscoelastic Response ofIndividual Carbon NanotubesAbstract: The goal of the proposed activity is the quantitative, nanoscale profiling of local variations in the elastic and viscoelastic properties of multiwall nanotubes (MWNTs). Ultrasonic force microscopy (UFM) and heterodyne force microscopy (HFM) will be utilized for the quantitative extraction and mapping of the reduced Young's modulus and loss factor, respectively, along the axis of single tubes grown via arc-discharge or chemical vapor deposition. Modulus extraction will exploit the nonlinear interaction between a scanning probe tip and the nanotube surface at ultrasonic vibrations ( 10 MHz) to determine the MWNT contact stiffness within a small (10nm x 10nm) area along the axis. The viscoelastic imaging will utilize a heterodyne approach wherein ultrasonic vibrations are applied to both the MWNT and the nanoprobe tip to produce a time-resolved mechanical phase image for the MWNT viscoelastic response. Thermal studies (100K to 600K) will also be undertaken for HFM nanotube profiling to investigate the thermal evolution of visoelasticity.

摘要：本研究的目标是对多壁纳米管（MWNTs）弹性和粘弹性特性的局部变化进行定量的纳米级分析。超声力显微镜（UFM）和外差力显微镜（HFM）将分别用于定量提取和绘制通过电弧放电或化学气相沉积生长的单管轴上的降低杨氏模量和损失因子。模量提取将利用扫描探针尖端和纳米管表面在超声振动（10 MHz）下的非线性相互作用来确定MWNT沿轴小（10nm × 10nm）区域内的接触刚度。粘弹性成像将利用外差方法，其中超声波振动应用于MWNT和纳米探针尖端，以产生MWNT粘弹性响应的时间分辨机械相位图像。热研究（100K至600K）也将对HFM纳米管剖面进行研究，以研究粘弹性的热演化。