A microelectromechanical systems (MEMS) force-displacement transducer for sub-5 nm nanoindentation and adhesion measurements
| Autor: | Yunje Oh, Andreas A. Polycarpou, Douglas Stauffer, Youfeng Zhang |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Microelectromechanical systems Fused quartz Materials science business.industry Capacitive sensing 02 engineering and technology Nanoindentation 021001 nanoscience & nanotechnology 01 natural sciences Noise (electronics) Displacement (vector) law.invention Transducer law Indentation 0103 physical sciences Optoelectronics 0210 nano-technology business Instrumentation |
| Zdroj: | The Review of scientific instruments. 89(4) |
| ISSN: | 1089-7623 |
| Popis: | We present a highly sensitive force-displacement transducer capable of performing ultra-shallow nanoindentation and adhesion measurements. The transducer utilizes electrostatic actuation and capacitive sensing combined with microelectromechanical fabrication technologies. Air indentation experiments report a root-mean-square (RMS) force resolution of 1.8 nN and an RMS displacement resolution of 0.019 nm. Nanoindentation experiments on a standard fused quartz sample report a practical RMS force resolution of 5 nN and an RMS displacement resolution of 0.05 nm at sub-10 nm indentation depths, indicating that the system has a very low system noise for indentation experiments. The high sensitivity and low noise enables the transducer to obtain high-resolution nanoindentation data at sub-5 nm contact depths. The sensitive force transducer is used to successfully perform nanoindentation measurements on a 14 nm thin film. Adhesion measurements were also performed, clearly capturing the pull-on and pull-off forces during approach and separation of two contacting surfaces. |
| Databáze: | OpenAIRE |
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