论文标题
强大的原子质测量的自动化
The automation of robust interatomic-force measurements
论文作者
论文摘要
使用频率调节原子显微镜定期进行原子间测量。这需要将观察到的力感应悬臂的共振频率转换为其尖端所经历的实际力。最近，Sader等人。自然纳米技术13，1088（2018）表明，这种力转换可能是不可靠的，并提出了拐点测试以识别有效且健壮的力数据。其常规实现需要高效且用户友好的算法，目前不存在。在这里，我们（1）推进了拐点测试的理论框架，（2）为其完整自动化开发了所需的有效算法，（3）通过研究两个实验数据集来证明这种自动化的实用性。本报告的主要结果是开发用户友好的软件，该软件将这种自动化与标准力量转换方法集成在一起。该软件为从业人员提供了能够无缝执行强大的纳米级和原子质测量的能力技术。
Interatomic-force measurements are regularly performed using frequency-modulation atomic force microscopy. This requires conversion of the observed shift in the resonant frequency of a force-sensing cantilever, to the actual force experienced by its tip. Recently, Sader et al. Nature Nanotechnology 13, 1088 (2018) showed that this force conversion can be unreliable and proposed the inflection point test to identify valid and robust force data. Efficient and user-friendly algorithms are required for its routine practical implementation, which currently do not exist. Here, we (1) advance the theoretical framework of the inflection point test, (2) develop the required efficient algorithms for its complete automation, and (3) demonstrate the utility of this automation by studying two experimental datasets. The principal outcome of this report is the development of user-friendly software that integrates this automation with a standard force conversion methodology. This software provides the enabling technology for practitioners to now seamlessly perform robust nanoscale and interatomic-force measurements.
