Multifrequency Imaging in the Intermittent Contact Mode of Atomic Force Microscopy: Beyond Phase Imaging
Abstract
The cantilever dynamics in single-frequency scanning probe microscopy (SPM) are undefined due to having only two output variables, which leads to poorly understood image contrast. to address this shortcoming, generalized phase imaging scanning probe microscopy (GP-SPM), based on broad band detection and multi-eigenmode operation, is developed and demonstrated on diamond nanoparticles with different functionalization layers. It is shown that rich information on tip-surface interactions can be acquired by separating the response amplitude, instant resonance frequency, and quality factor. the obtained data allow high-resolution imaging even in the ambient environment. by tuning the strength of tip-surface interaction, different surface functionalizations can be discerned. Resonance frequency mapping of nanodiamond particles functionalized with octadecylamine on a mica substrate is carried out by generalized phase scanning probe microscopy (GP-SPM). the method is based on broad band detection and multi-eigenmode operation. Information on tip-surface interactions can be acquired by separating the response amplitude, instant resonance frequency, and quality factor.
Recommended Citation
S. Guo et al., "Multifrequency Imaging in the Intermittent Contact Mode of Atomic Force Microscopy: Beyond Phase Imaging," Small, vol. 8, no. 8, pp. 1264 - 1269, Wiley-VCH Verlag, Jan 2012.
The definitive version is available at https://doi.org/10.1002/smll.201101648
Department(s)
Chemistry
International Standard Serial Number (ISSN)
1613-6810
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2012 Wiley-VCH Verlag, All rights reserved.
Publication Date
01 Jan 2012