Document Detail


Quartz tuning fork-based frequency modulation atomic force spectroscopy and microscopy with all digital phase-locked loop.
MedLine Citation:
PMID:  23206069     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We present a platform for the quartz tuning fork (QTF)-based, frequency modulation atomic force microscopy (FM-AFM) system for quantitative study of the mechanical or topographical properties of nanoscale materials, such as the nano-sized water bridge formed between the quartz tip (∼100 nm curvature) and the mica substrate. A thermally stable, all digital phase-locked loop is used to detect the small frequency shift of the QTF signal resulting from the nanomaterial-mediated interactions. The proposed and demonstrated novel FM-AFM technique provides high experimental sensitivity in the measurement of the viscoelastic forces associated with the confined nano-water meniscus, short response time, and insensitivity to amplitude noise, which are essential for precision dynamic force spectroscopy and microscopy.
Authors:
Sangmin An; Mun-Heon Hong; Jongwoo Kim; Soyoung Kwon; Kunyoung Lee; Manhee Lee; Wonho Jhe
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  The Review of scientific instruments     Volume:  83     ISSN:  1089-7623     ISO Abbreviation:  Rev Sci Instrum     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-12-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0405571     Medline TA:  Rev Sci Instrum     Country:  United States    
Other Details:
Languages:  eng     Pagination:  113705     Citation Subset:  IM    
Affiliation:
Center for Nano-Liquid, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, South Korea.
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