Response to the “Comment on ‘Thermal frequency noise in dynamic scanning force microscopy’” [J. Appl. Phys. 110, 036107 (2011)]

Colchero, J.; Martínez, Juan Francisco González; Abad, José Antonio; García, B. Pérez; Cuenca, M.; Palacios-Lidón, E.; Abellán, J.

doi:10.1063/1.3619795

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Performance Metrics For High-resolution Imaging In Dafm1

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2013

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“…However, the bandwidth restriction does not apply to self-excited FM [8,44]. Allowing B >> ω 0 / Q suggests that self-excited FM has the potential to be noisier than externally excited FM; however, this is a topic of ongoing debate [45–46]. …”

Section: Performance Metrics For High-resolution Imaging In Dafmmentioning

confidence: 99%

High-resolution dynamic atomic force microscopy in liquids with different feedback architectures

Melcher¹,

Martínez-Martín²,

Jaafar³

et al. 2013

Beilstein J. Nanotechnol.

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SummaryThe recent achievement of atomic resolution with dynamic atomic force microscopy (dAFM) [Fukuma et al., Appl. Phys. Lett. 2005, 87, 034101], where quality factors of the oscillating probe are inherently low, challenges some accepted beliefs concerning sensitivity and resolution in dAFM imaging modes. Through analysis and experiment we study the performance metrics for high-resolution imaging with dAFM in liquid media with amplitude modulation (AM), frequency modulation (FM) and drive-amplitude modulation (DAM) imaging modes. We find that while the quality factors of dAFM probes may deviate by several orders of magnitude between vacuum and liquid media, their sensitivity to tip–sample forces can be remarkable similar. Furthermore, the reduction in noncontact forces and quality factors in liquids diminishes the role of feedback control in achieving high-resolution images. The theoretical findings are supported by atomic-resolution images of mica in water acquired with AM, FM and DAM under similar operating conditions.

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