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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.19 No.11[Special Edition]
발행연도
2005.11
수록면
2,172 - 2,178 (7page)

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초록· 키워드

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We describe a cantilever device for a novel ‘Time-Of-Flight Scanning Force Microscope(TOF-SFM)’ concept that has the capability of chemical analysis. The cantilever device consists of a switchable cantilever (SC), a microfabricated extraction electrode, and a LEGO-type microstage, which combines two different systems. It allows quasi-simultaneous topographical and chemical imaging of a sample surface to be performed in the same way as with conventional scanning probe techniques. This is achieved by the micromachined SC with a bimorph actuator that provides a reasonable switching speed in comparison with mechanically operated switches. Secondly, a short tip-electrode distance to minimize the ions extraction voltage can be realized by LEGO-type microfabrication. The measured SC tip deflection is ~100 ㎛ at 35 ㎽, corresponding to an estimated heater temperature of ~250℃. The maximum switching speed between the two modes is ~10 msec, and the sensitivity ΔR/R of an integrated piezoresistive deflection sensor is ~6.7 × 10^(-7)/㎚. The tip-electrode distance is only 10 ㎛. The TOF-SFM is currently integrated in an ultra-high-vacuum system to perform several measurements.

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Abstract

1. Introduction

2. Cantilever Device Design

3. Experimental Results

4. Conclusions

References

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