Water diffusion in polymer nano-films measured with microcantilevers

Liu, Chuanjun; Lopes, Marcus C.; Pihan, Sascha A.; Fell, Daniela; Sokuler, Mordechai; Butt, Hans‐Jürgen; Auernhammer, Günter K.; Bonaccurso, Elmar

doi:10.1016/j.snb.2011.07.007

Cited by 14 publications

(13 citation statements)

References 22 publications

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“…Technical applications like crop spraying (Xu et al, 2011), spray cooling (Sodtke and Stephan, 2007), heat exchange processes, combustion, measurement of diffusion coefficients in polymer films (Liu et al, 2011), and inkjet printing (Park and Moon, 2006) rely on the physics of the evaporation of sessile drops. Controlling the evaporation of sessile drops is therefore of crucial importance.…”

Section: Influence Of Soft Substrates On the Evaporation Of Pure Watermentioning

confidence: 99%

Soft Substrates

Lopes¹

2015

Droplet Wetting and Evaporation

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Section: Influence Of Soft Substrates On the Evaporation Of Pure Watermentioning

confidence: 99%

Soft Substrates

Lopes¹

2015

Droplet Wetting and Evaporation

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“…For instance, the ink-jet deposition method was used for poly(vinyl alcohol) depositions, while for poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate), and poly(vinyl chloride-co-vinyl acetate-co-2-hydroxypropyl acrylate) microarray spotting pins were applied [28]. Polymers can be polymerized onto MCs by plasma polymerization [22,23] or…”

Section: Resultsmentioning

confidence: 99%

“…The usual techniques to investigate swelling behavior of thin polymer layers by a given solvent vapor are reflectometry [15], gravimetry [16], quartz crystal microbalance with dissipation monitoring (QCM-D) [17], attenuated total reflection infrared (ATR-IR) A c c e p t e d M a n u s c r i p t 4 spectroscopy [18], optical interferometry [19] and AFM force versus distance interaction curves [20,21]. The use of bending responses of polymer coated MC under variable moisture levels has been used to understand the swelling behavior of polymeric networks with different crosslinking degrees [22] or to determine the diffusion coefficient of water in the thin polymer film [23].…”

Section: Introductionmentioning

confidence: 99%

Monitoring swelling and deswelling of thin polymer films by microcantilever sensors

Rey¹,

Silva

Meneses³

et al. 2014

Sensors and Actuators B: Chemical

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Microcantilever based sensors are promising devices because they are fast, low cost, portable and allow measuring extremely small quantities of substances in gas or liquid phase that are not detectable by other methods. In this work we investigate the swelling and deswelling behavior of poly(hydroxyl ethyl methacrylate), PHEMA, films with three different average molecular masses deposited onto bare silicon microcantilevers, a hydrophilic substrate, and onto polystyrene (PS) coated microcantilevers, which is a hydrophobic substrate, under humidity cycles by monitoring the deflections resulting from differential surface stress. The results found in the present study demonstrate that the micromechanical response observed are related not only to the polymer molecular weight, but also to the polymer-interface phenomena and environment-polymer interface that can play a crucial role on the signal transduction. Ellipsometric measurements evidenced that the swelling of PHEMA films with intermediate molecular weight at 80% RH follows Fickian diffusion mechanism. Nevertheless, due to the weak optical contrast or film homogeneity shorter or longer chains than PHEMA-300 could not be investigated by ellipsometry. PHEMA films deposited onto PS surfaces presented dewetting, which limited the ellipsometric measurements. In comparison to ellipsometry, monitoring swelling behavior of PHEMA by nanomechanical responses is more advantageous because it is faster and less restricted.

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“…7c. The elastic response of the cantilevers allows to monitor capillary phenomena in small scales, such as the evaporation of microdrops [116 •• ,119-121], the diffusion of liquid molecules into polymers [122,123] and also the wetting dynamics of microparticles [124]. While a droplet is deposited between two flexible fibres, it can completely spread, partially spread or not spread along the fibres, depending on the competition between elasticity and capillarity ( Fig.…”

Section: Capillary Phenomena On "Soft" Thin Films Cantilevers and Fimentioning

confidence: 99%

Static and dynamic wetting of soft substrates

Chen

Bonaccurso

Gambaryan‐Roisman

et al. 2018

Current Opinion in Colloid & Interface Science

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a b s t r a c tA survey of recent literature on wetting phenomena reveals that there is a fast-growing interest in wetting of soft or deformable substrates, due to its potential applications in many industrial, technical and biological processes. Unlike rigid substrates, a droplet deposited on a soft substrate deforms the substrate via a combination of the normal component of surface tension and the Laplace pressure, i.e. by capillary force and the action of disjoining pressure. In turn, the capillary and disjoining pressure-induced substrate deformation affects the wetting phenomena on the substrate. In this review, we summarize recent achievements on static and dynamic wetting of soft substrates and provide an outlook to future progress. In static wetting, theoretical, numerical and experimental investigations of capillary and disjoining pressure-induced substrate deformation are introduced, and corresponding effects on contact angle and contact angle hysteresis are discussed. In dynamic wetting, the influence of substrate stiffness on spontaneous wetting, droplet impact dynamics, and other types of forced wetting and dewetting is considered. Finally, other interesting capillarity-controlled phenomena occurring on soft and softlike substrates are briefly introduced.

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Water diffusion in polymer nano-films measured with microcantilevers

Cited by 14 publications

References 22 publications

Soft Substrates

Soft Substrates

Monitoring swelling and deswelling of thin polymer films by microcantilever sensors

Static and dynamic wetting of soft substrates

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