Submicron probe of polymer adhesion with atomic force microscopy: Dependence on topography and material inhomogeneities

Mizes, H. A.; Loh, K.-G.; Miller, Richard J.; Ahuja, S.; Grabowski, E. F.

doi:10.1063/1.105846

Cited by 148 publications

(80 citation statements)

References 6 publications

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“…AFM plays an important role in the investigation of the mechanical properties of cells, as it allows manipulation at single-cell level, local determination of the viscoelasticity of cells and direct observation of the cell surface at nanometer resolution (Binnig, Quate & Gerber, 1986;Burnham & Colton, 1989;Mizes, Loh, Miller, Ahuja & Grabowski, 1991).…”

Section: Introductionmentioning

confidence: 99%

Influence of Cell Surface and Nanomechanical Properties on the Flocculation Ability of Industrial Saccharomyces cerevisiae Strains

Nayyar¹,

Walker²,

Canetta³

et al. 2017

JFR

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In the past few years, atomic force microscopy (AFM) has provided novel information on the ultrastructural and nanomechanical properties of yeast cell walls that play a major role in determining the flocculation characteristics of the yeasts. In this study, we used AFM to visualize at the nanoscale the cell surface topography and to determine cell wall nanomechanical properties (e.g. elasticity and adhesion) of different strains of S. cerevisiae employed for brewing, winemaking and fuel alcohol production. Cell surface topography was found to correlate with the flocculation behaviour of these strains during their late stationary phase, with the cell surface of flocculent cells being rougher than that of weakly flocculent cells. The elastic modulus of the yeast cell walls showed that weakly flocculent strains had a more rigid cell wall than highly flocculent strains. This difference in elasticity seemed to have an effect on the adhesive properties of the yeast cell walls, with weakly flocculent yeasts displaying lower adhesion energy than the highly flocculent strains. These findings seem to indicate that yeast cell surface nanomechanical properties play an important role in governing flocculation.

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Section: Introductionmentioning

confidence: 99%

Influence of Cell Surface and Nanomechanical Properties on the Flocculation Ability of Industrial Saccharomyces cerevisiae Strains

Nayyar¹,

Walker²,

Canetta³

et al. 2017

JFR

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“…A positive value for the Skewness parameter translates into the prevalence of the peaks present in the topography images [ 11 ]. The changes of the surface properties [ 12 ] with the carbon nanotubes addition into the polymer matrix are revealed by the imaged force distance measurements, illustrated in figure 3, 4. As previously was mentioned each adhesion map was plotted as an adhesion force values dependence of the (x, y) position of each from those 400 forcedistance curves acquired.…”

Section: Resultsmentioning

confidence: 96%

Adhesive Properties Study of f-SWCNTs:P3OT Nanocomposite Thin Film

Alzanganawee¹,

Brîncoveanu²,

Mesterca³

et al. 2016

ARA 40th Congress Proceedings

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Topography and 'pull off' curves are two of the most important among the many available AFM modes, which are enabling the morphological and mechanical properties investigations of the surfaces. It is known that nanocomposites synthesizing has attracted the worldwide scientists' interest, due to the enlarged properties of these materials. There are few studies on P3OT:SWCNTs nanocomposites used in OPVs when compared to fullerene derivatives and even fewer focused on mechanical properties, as the main research direction was to increase the efficiency. In this paper, preparation and characterization of the P3OT pure polymer and 12% f-SWCNTs:P3OT nanocomposite, respectively, were reported. The experimental results showed the noticeable effect of the carbon nanotubes addition into the polymer matrix. The surface roughness of the nanocomposite increased due to the presence of the fSWCNTs, while the adhesion force values decreased. The adhesion force variation distribution becomes more uniform, with the carbon nanotubes addition into the host.

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“…The PnBMA regions are brighter than the PS film, i.e., they have a larger adhesion. Also, in force volume measurements, very steep edges engender artifacts due to changes in the contact area [32] or to abrupt movements of the tip, as can be observed at the border of the holes or at the droplet-like PS structures inside the holes.…”

Section: Resultsmentioning

confidence: 99%

Mechanical Properties and Adhesion of a Micro Structured Polymer Blend

Cappella

2011

Polymers

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Abstract:A 50:50 blend of polystyrene (PS) and poly(n-butyl methacrylate) (PnBMA) has been characterized with an Atomic Force Microscope (AFM) in Tapping Mode and with force-distance curves. The polymer solution has been spin-coated on a glass slide. PnBMA builds a uniform film on the glass substrate with a thickness of ≅200 nm. On top of it, the PS builds an approximately 100 nm thick film. The PS-film undergoes dewetting, leading to the formation of holes surrounded by about 2 µm large rims. In those regions of the sample, where the distance between the holes is larger than about 4 µm, light depressions in the PS film can be observed. Topography, dissipated energy, adhesion, stiffness and elastic modulus have been measured on these three regions (PnBMA, PS in the rims and PS in the depressions). The two polymers can be distinguished in all images, since PnBMA has a higher adhesion and a smaller stiffness than PS, and hence a higher dissipated energy. Moreover, the polystyrene in the depressions shows a very high adhesion (approximately as high as PnBMA) and its stiffness is intermediate between that of PnBMA and that of PS in the rims. This is attributed to higher mobility of the PS chains in the depressions, which are precursors of new holes.

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Submicron probe of polymer adhesion with atomic force microscopy: Dependence on topography and material inhomogeneities

Cited by 148 publications

References 6 publications

Influence of Cell Surface and Nanomechanical Properties on the Flocculation Ability of Industrial Saccharomyces cerevisiae Strains

Influence of Cell Surface and Nanomechanical Properties on the Flocculation Ability of Industrial Saccharomyces cerevisiae Strains

Adhesive Properties Study of f-SWCNTs:P3OT Nanocomposite Thin Film

Mechanical Properties and Adhesion of a Micro Structured Polymer Blend

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