Capillary filling speed of water in nanochannels

Tas, Niels Roelof; Haneveld, Jeroen; Jansen, Henricus V.; Elwenspoek, M.; Berg, Albert van den

doi:10.1063/1.1804602

Cited by 255 publications

(265 citation statements)

References 18 publications

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“…The validity of Eq. (1) has been reported, even in a glass channel with a 5-nm depth (Tas et al 2004). It was also reported that water permeation in concrete can be evaluated with Eq.…”

Section: Calculation Of the Permeation Ratementioning

confidence: 95%

Relationship Among the Permeation Rate of Water into Concrete, the Mix Design, Curing, and the Degree of Drying

Sakai

Yokoyama

Kishi

2017

ACT

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Water permeation into concrete causes various types of deterioration in concrete structures such as rebar corrosion, frost damage, ASR, etc.; however, the evaluation of the water permeation rate is difficult. This paper proposes a simple equation to evaluate the water permeation rate into concrete, based on basic information such as the mix design, curing condition, and degree of drying. Concrete specimens are cast, cut into slices of different thicknesses, and the time taken for water penetration is measured. The permeation rate is calculated from the relationship between the obtained permeation time and the slice thickness. Additionally, a literature survey is conducted to collect the water permeation rate in various types of concrete. A prediction equation for the water permeation rate is proposed, based on the data. Although this data contains various types of concrete with/without the admixture material, different water-to-binder ratios, and different curing conditions, all the calculated values fall within a range of ±150% of the data from literature.

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“…The validity of Eq. (1) has been reported, even in a glass channel with a 5-nm depth (Tas et al 2004). It was also reported that water permeation in concrete can be evaluated with Eq.…”

Section: Calculation Of the Permeation Ratementioning

confidence: 95%

Relationship Among the Permeation Rate of Water into Concrete, the Mix Design, Curing, and the Degree of Drying

Sakai

Yokoyama

Kishi

2017

ACT

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“…The position of the moving meniscus in nanochannels as a function of time has been modeled ͑Washburn, 1921; Tas et al, 2004͒, but after a certain filling length, the formation of bubbles by the enclosure of air is typically encountered, a problem that has been addressed ͑Han, Riehn and Austin, 2006͒. For capillary filling studies, the behavior of liquid in shallow nanochannels down to 6 nm can be monitored with a Fabry-Perot interferometer by measuring the refractive index of the medium inside the channel ͑Delft et al,…”

Section: B Electrokinetic Effects In Nanochannelsmentioning

confidence: 99%

Transport phenomena in nanofluidics

2008

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The transport of fluid in and around nanometer-sized objects with at least one characteristic dimension below 100 nm enables the occurrence of phenomena that are impossible at bigger length scales. This research field was only recently termed nanofluidics, but it has deep roots in science and technology. Nanofluidics has experienced considerable growth in recent years, as is confirmed by significant scientific and practical achievements. This review focuses on the physical properties and operational mechanisms of the most common structures, such as nanometer-sized openings and nanowires in solution on a chip. Since the surface-to-volume ratio increases with miniaturization, this ratio is high in nanochannels, resulting in surface-charge-governed transport, which allows ion separation and is described by a comprehensive electrokinetic theory. The charge selectivity is most pronounced if the Debye screening length is comparable to the smallest dimension of the nanochannel cross section, leading to a predominantly counterion containing nanometer-sized aperture. These unique properties contribute to the charge-based partitioning of biomolecules at the microchannel-nanochannel interface. Additionally, at this free-energy barrier, size-based partitioning can be achieved when biomolecules and nanoconstrictions have similar dimensions. Furthermore, nanopores and nanowires are rooted in interesting physical concepts, and since these structures demonstrate sensitive, label-free, and real-time electrical detection of biomolecules, the technologies hold great promise for the life sciences. The purpose of this review is to describe physical mechanisms on the nanometer scale where new phenomena occur, in order to exploit these unique properties and realize integrated sample preparation and analysis systems.

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“…5,6 An extremely large slip length (micrometre order) inside a very small tube (nanometre order) indicates a nearly flat velocity profile, in contrast to the Hagen-Poiseuille flow model. On the other hand, experiments have also shown an increased flow resistance in nanocapillary filling, 8,9 and the explanation of this increased resistance in nanochannel is not clear either. 9,10 In order to build functional and practical nanofluidic devices, it is also important to know the velocity profile, which plays an key role for transport phenomenon and separation in nanofluidics, due to, e.g.…”

Section: Introductionmentioning

confidence: 95%

A novel far-field nanoscopic velocimetry for nanofluidics

Kuang

Wang

2010

Lab Chip

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For the first time we have been able to measure the flow velocity profile for nanofluidics with a spatial resolution better than 70 nm. Due to the diffraction resolution barrier, traditional optical methods have so far failed in measuring the velocity profile in a nanocapillary or a closed nanochannel without an opened sidewall. A novel optical point measurement method is presented which applies stimulated emission depletion (STED) microscopy to laser induced fluorescence photobleaching anemometer (LIFPA) techniques to measure flow velocity. Herein we demonstrate this far-field nanoscopic velocimetry method by measuring the velocity profile in a nanocapillary with an inner diameter of 360 nm. The closest measuring point to the wall is about 35 nm. This method opens up a new class of functional measuring techniques for nanofluidics and for nanoscale flows from the wall.

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Capillary filling speed of water in nanochannels

Cited by 255 publications

References 18 publications

Relationship Among the Permeation Rate of Water into Concrete, the Mix Design, Curing, and the Degree of Drying

Relationship Among the Permeation Rate of Water into Concrete, the Mix Design, Curing, and the Degree of Drying

Transport phenomena in nanofluidics

A novel far-field nanoscopic velocimetry for nanofluidics

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