2012
DOI: 10.3762/bjnano.3.53
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Mapping mechanical properties of organic thin films by force-modulation microscopy in aqueous media

Abstract: SummaryThe mechanical properties of organic and biomolecular thin films on surfaces play an important role in a broad range of applications. Although force-modulation microscopy (FMM) is used to map the apparent elastic properties of such films with high lateral resolution in air, it has rarely been applied in aqueous media. In this letter we describe the use of FMM to map the apparent elastic properties of self-assembled monolayers and end-tethered protein thin films in aqueous media. Furthermore, we describe… Show more

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Cited by 6 publications
(6 citation statements)
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“…For example, studies of the elastic modulus of SAMS and protein films was accomplished in liquid media using force modulation AFM [30]. Liquid imaging often has advantages for AFM studies, particularly for conducting in situ investigations of chemical or biochemical reactions.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…For example, studies of the elastic modulus of SAMS and protein films was accomplished in liquid media using force modulation AFM [30]. Liquid imaging often has advantages for AFM studies, particularly for conducting in situ investigations of chemical or biochemical reactions.…”
Section: Resultsmentioning
confidence: 99%
“…Liquid environments expand the capabilities for scanning probe protocols to provide insight for dynamic processes at the nanoscale [ 29 ]. For example, studies of the elastic modulus of SAMS and protein films was accomplished in liquid media using force modulation AFM [ 30 ]. Liquid imaging often has advantages for AFM studies, particularly for conducting in situ investigations of chemical or biochemical reactions.…”
Section: Resultsmentioning
confidence: 99%
“…In these experiments, performed in either DI water (Milli-Q) or anhydrous n -dodecane (<0.005% water), AFM tips were pressed against fused silica surfaces at a fixed average loading force over which a sinusoidally oscillating force is superimposed using the AFM force modulation mode (FMM) . As such, the tip is in contact with the substrate at a given static force ( F 0 ), while a force ( F 1 ) is superimposed . This can be summarized via eq : where f is the frequency and t is the time.…”
Section: Methodsmentioning
confidence: 99%
“…34 As such, the tip is in contact with the substrate at a given static force (F 0 ), while a force (F 1 ) is superimposed. 35 This can be summarized via eq 1:…”
Section: ■ Experimental Sectionmentioning
confidence: 99%
“…In liquid environments little operational penalty is placed on using AFM of resonance due to the low Q-factors. On the other hand the cantilever dynamics under off-resonance conditions can be quite complicated and needs to be understood since many new imaging modes in liquids use such excitations ( [41,42]).…”
Section: Discussionmentioning
confidence: 99%