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Title: Optimizing qPlus sensor assemblies for simultaneous scanning tunneling and noncontact atomic force microscopy operation based on finite element method analysis

Journal Article · · Beilstein Journal of Nanotechnology
DOI:https://doi.org/10.3762/bjnano.8.70· OSTI ID:1426778

Quartz tuning forks that have a probe tip attached to the end of one of its prongs while the other prong is arrested to a holder (“qPlus” configuration) have gained considerable popularity in recent years for high-resolution atomic force microscopy imaging. The small size of the tuning forks and the complexity of the sensor architecture, however, often impede predictions on how variations in the execution of the individual assembly steps affect the performance of the completed sensor. Extending an earlier study that provided numerical analysis of qPlus-style setups without tips, this work quantifies the influence of tip attachment on the operational characteristics of the sensor. The results using finite element modeling show in particular that for setups that include a metallic tip that is connected via a separate wire to enable the simultaneous collection of local forces and tunneling currents, the exact realization of this wire connection has a major effect on sensor properties such as spring constant, quality factor, resonance frequency, and its deviation from an ideal vertical oscillation.

Research Organization:
Yale Univ., New Haven, CT (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
sC0016179
OSTI ID:
1426778
Journal Information:
Beilstein Journal of Nanotechnology, Vol. 8; ISSN 2190-4286
Publisher:
Beilstein InstituteCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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Cited By (6)

The qPlus sensor, a powerful core for the atomic force microscope journal January 2019
Calibration of the oscillation amplitude of electrically excited scanning probe microscopy sensors journal January 2019
Accuracy of tip-sample interaction measurements using dynamic atomic force microscopy techniques: Dependence on oscillation amplitude, interaction strength, and tip-sample distance journal March 2019
Torque Differential Magnetometry Using the qPlus Mode of a Quartz Tuning Fork journal February 2018
Quantifying Tip-Sample Interactions in Vacuum Using Cantilever-Based Sensors: An Analysis journal April 2018
Sensing Performance Analysis on Quartz Tuning Fork-Probe at the High Order Vibration Mode for Multi-Frequency Scanning Probe Microscopy journal January 2018

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