NDLI: Spatial horizons in amplitude and frequency modulation atomic force microscopy

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Nanoscale Vol - 4 Issue - 6

Nanoscale Vol - 4 Issue - 5

Nanoscale Vol - 4 Issue - 4

Nanoscale Vol - 4 Issue - 3

Nanoscale Vol -3

Nanoscale Vol -2

Nanoscale Vol -1

Spatial horizons in amplitude and frequency modulation atomic force microscopy

Content Provider	Royal Society of Chemistry (RSC)
Author	Barcons, Victor Santos, Sergio Font, Josep Thomson, Neil H. Chiesa, Matteo Verdaguer, Albert
Copyright Year	2012
Abstract	In dynamic atomic force microscopy (AFM) the cantilever is vibrated and its dynamics are monitored to probe the sample with nanoscale and atomic resolution. Amplitude and frequency modulation atomic force microscopy (AM-AFM and FM-AFM) have established themselves as the most powerful methods in the field. Nevertheless, it is still debatable whether one or the other technique is preferred in a given medium or experiment. Here, we quantitatively establish and compare the limitations in resolution of both techniques by introducing the concept of spatial horizon (SH) and quantifying it. The SH is the limiting spatial boundary beyond which collective atomic interactions do not affect the detection parameters of a given feedback system. We show that while an FM-AFM feedback can resolve a single atom or atomic defect where an AM feedback might fail, relative contrast is in fact equivalent for both feedback systems. That is, if the AM feedback could detect sufficiently small amplitude shifts and there was no noise, the detection of single atoms or atomic defects would be equivalent in AM-AFM and FM-AFM.
Starting Page	2463
Ending Page	2469
Page Count	7
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	4
Issue Number	7
Journal	Nanoscale
DOI	10.1039/c2nr12012g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Frequency modulation Atomic-force microscopy Amplitude modulation Cantilever
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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