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arXiv 0708.4248cond-mat.mtrl-sci
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纳米尺度能量耗散的扫描探针显微镜带激发法快速测绘

The Band Excitation Method in Scanning Probe Microscopy for Rapid Mapping of Energy Dissipation on the Nanoscale

Stephen Jesse, Sergei V. Kalinin, Roger Proksch, A. P. Baddorf, B. J. Rodriguez

摘要:

在纳米尺度上绘制能量转化途径和耗散,并了解局部结构对耗散行为的作用,是从电子和信息技术到高效能源生产等领域成像的一个挑战。在这里,我们开发了一种新的扫描探针显微镜(SPM)技术,其中的悬臂梁被激发和响应记录在一个频带的频率同时,而不是在一个单一的频率在传统的SPM。该带激励(BE)SPM允许在图像中的每个点(即传递函数)处非常快速地获取全频率响应,并且特别地使得能够通过确定采样系统的Q因子来直接测量能量耗散。BE方法证明力-距离和电压谱和磁耗散成像的灵敏度接近热机械极限。分析了边界元法对各种SPM的适用性,该方法有望普遍适用于所有环境和液体SPM。

英文摘要:

Mapping energy transformation pathways and dissipation on the nanoscale and understanding the role of local structure on dissipative behavior is a challenge for imaging in areas ranging from electronics and information technologies to efficient energy production. Here we develop a novel Scanning Probe Microscopy (SPM) technique in which the cantilever is excited and the response is recorded over a band of frequencies simultaneously rather than at a single frequency as in conventional SPMs. This band excitation (BE) SPM allows very rapid acquisition of the full frequency response at each point (i.e. transfer function) in an image and in particular enables the direct measurement of energy dissipation through the determination of the Q-factor of the cantilever-sample system. The BE method is demonstrated for force-distance and voltage spectroscopies and for magnetic dissipation imaging with sensitivity close to the thermomechanical limit. The applicability of BE for various SPMs is analyzed, and the method is expected to be universally applicable to all ambient and liquid SPMs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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