Characterization of the wettability of thin nanostructured films in the presence of evaporation

Rogacs, Anita; Steinbrenner, Julie E.; Rowlette, Jeremy; Weisse, Jeffrey M.; Zheng, Xiaolin; Goodson, Kenneth E.

doi:10.1016/j.jcis.2010.05.063

Cited by 30 publications

(18 citation statements)

References 31 publications

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“…4 depicts the experimental data of the water flow on Whatman #1 filter paper strips and shows the comparison between the traditional Lucas-Washburn model and the modified models adapted from N. Fries et al 2008 29 and A. Rogacs et al 2010. 30 The two modified models were further altered by taking into account the effect of the water content of the paper fibres. 31 Cellulose fibres have a "fibre saturation point" that describes the water content in the pores of the fibre wall.…”

Section: Data Analysis and Parameter Extractionmentioning

confidence: 99%

Paper-based microfluidics with an erodible polymeric bridge giving controlled release and timed flow shutoff

et al. 2014

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Water soluble pullulan films were formatted into paper-based microfluidic devices, serving as a controlled time shutoff valve. The utility of the valve was demonstrated by a one-step, fully automatic implementation of a complex pesticide assay requiring timed, sequential exposure of an immobilized enzyme layer to separate liquid streams. Pullulan film dissolution and the capillary wicking of aqueous solutions through the device were measured and modeled providing valve design criteria. The films dissolve mainly by surface erosion, meaning the film thickness mainly controls the shutoff time. This method can also provide time-dependent sequential release of reagents without compromising the simplicity and low cost of paper-based devices.

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Section: Data Analysis and Parameter Extractionmentioning

confidence: 99%

Paper-based microfluidics with an erodible polymeric bridge giving controlled release and timed flow shutoff

et al. 2014

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“…(3) The model accounting for evaporation effect and viscous force was also proposed by Rogacs et al [ 37 ]. Capillary rise level out viscous force and evaporation effect:

…”

Section: Resultsmentioning

confidence: 99%

“…This confirms the role of the gravity effects in the wicking rise of the coated wick structure. Rogacs et al have developed the model 3 to characterize the wettability of nanostructured porous thin film (~10 µm film thickness) made by hydrophilic silicon nanowire arrays [ 37 ]. They reported a simple criterion to determine whether evaporation or gravity effects can be ignored, which depended on sample sizes and experimental conditions.…”

Section: Resultsmentioning

confidence: 99%

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Capillary Rise of Nanostructured Microwicks

et al. 2018

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Capillarity refers to the driving force to propel liquid through small gaps in the absence of external forces, and hence enhanced capillary force has been pursued for various applications. In this study, flower like ZnO nanostructures are successfully deposited to enhance capillarity of microwick structures that are specially designed to augment boiling heat transfer performance. Microreactor-assisted nanomaterial deposition, MANDTM, is employed with a flow cell to deposit the ZnO nanostructures on a large sized microwick (4.3 cm × 10.7 cm) with dual-channel configuration. A capillary rise experiment based on the mass gain method is first performed using water and ethanol (EtOH) as the working liquids to demonstrate the enhanced capillary force induced by the ZnO nanostructure on the microwick structure. It is found that the coating of ZnO nanostructure effectively propels the working fluids through the nano- or micro pores created from the ZnO nanostructure and consequently improves the capillary force. In order to investigate the wicking mechanism of the ZnO coated microwick structure, the capillary rise result based on height measurement was compared with analytical models. It is found that the gravity effect and viscous force play an important role in wicking rise of the coated wick structure. This study aims at demonstrating the capability of the integrated MAND process with a flow cell for producing a large scaled nanostructured surface, which eventually has a great potential for enhanced boiling heat transfer.

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“…Accordingly, the proper dimensions of SiNW can be obtained from many methods, for instance, vapor-liquid-solid process (VLS) (Wang et al , 2008;Rogacs et al , 2010;Pan et al , 2005;Rosaz et al , 2011;Akhtar et al , 2008), solid-liquid-solid process (SLS) (Wang et al , 2008;Yan et al , 2000;Yu et al , 2001), oxide-assisted growth method (OAG) (Wang et al , 2008;Niu et al , 2004;Yao et al , 2005) and electroless metal deposition (EMD) Chen et al , 2008) (see Chapter 2 of this book for additional details). According to the above methods, SiNW are fabricated in diverse morphologies shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Mediated differentiation of stem cells by engineered semiconducting silicon nanowires

Yen

Lin

2014

Semiconducting Silicon Nanowires for Biomedical Applications

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Characterization of the wettability of thin nanostructured films in the presence of evaporation

Cited by 30 publications

References 31 publications

Paper-based microfluidics with an erodible polymeric bridge giving controlled release and timed flow shutoff

Paper-based microfluidics with an erodible polymeric bridge giving controlled release and timed flow shutoff

Capillary Rise of Nanostructured Microwicks

Mediated differentiation of stem cells by engineered semiconducting silicon nanowires

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