Interferometric measurement of a diffusion coefficient: comparison of two methods and uncertainty analysis

Riquelme, Rodrigo; Lira, Ignacio; Pérez-López, Carlos; Rayas, J. A.; Rodrı́guez-Vera, Ramón

doi:10.1088/0022-3727/40/9/015

Cited by 56 publications

(28 citation statements)

References 38 publications

(77 reference statements)

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“…(2)], we find that after about 100 s the evaporation-caused surface propagation towards the interior becomes larger than the diffusion path of the FS particles ( Figure S4) so that this diffusion can no longer balance out the effects of surface propagation. In contrast, the electrolyte concentration profile remains homogeneous throughout the droplet as the salt ions, with " D NaCl for NaCl being 1.6 10 À5 cm 2 s À1 , [17] diffuse rapidly enough to avoid gradients during the evaporation time until the drying of the droplet is complete.…”

Section: Methodsmentioning

confidence: 99%

Controlling the Shape of Evaporating Droplets by Ionic Strength: Formation of Highly Anisometric Silica Supraparticles

2013

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Anisometric silica supraparticles are produced by a simple process of evaporation of sessile droplets containing fumed silica deposited on a superhydrophobic substrate. The shape of the supraparticles is directly controlled by the salt (NaCl) concentration, becoming anisometric beyond a threshold concentration, as quantified by light microscopy. This process is easily extended to supraparticles containing further functional colloidal components.

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Section: Methodsmentioning

confidence: 99%

Controlling the Shape of Evaporating Droplets by Ionic Strength: Formation of Highly Anisometric Silica Supraparticles

2013

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“…The relative importance of the advection and diffusion are important. The ions of salts are relatively small and diffuse about 4 times more rapidly (Riquelme et al, 2007) than the larger FL ions (Casalini et al, 2011). Because of this, the osmolarity in the TBU starts to drop by 15 s post-blink, even though fluid motion is toward the center of TBU.…”

Section: Interblinkmentioning

confidence: 99%

Dynamics and function of the tear film in relation to the blink cycle

Braun

King‐Smith

Begley

et al. 2015

Progress in Retinal and Eye Research

120

163

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Great strides have recently been made in quantitative measurements of tear film thickness and thinning, mathematical modeling thereof and linking these to sensory perception. This paper summarizes recent progress in these areas and reports on new results. The complete blink cycle is used as a framework that attempts to unify the results that are currently available. Understanding of tear film dynamics is aided by combining information from different imaging methods, including fluorescence, retroillumination and a new high-speed stroboscopic imaging system developed for studying the tear film during the blink cycle. During the downstroke of the blink, lipid is compressed as a thick layer just under the upper lid which is often released as a narrow thick band of lipid at the beginning of the upstroke. “Rippling” of the tear film/air interface due to motion of the tear film over the corneal surface, somewhat like the flow of water in a shallow stream over a rocky streambed, was observed during lid motion and treated theoretically here. New mathematical predictions of tear film osmolarity over the exposed ocular surface and in tear breakup are presented; the latter is closely linked to new in vivo observations. Models include the effects of evaporation, osmotic flow through the cornea and conjunctiva, quenching of fluorescence, tangential flow of aqueous tears and diffusion of tear solutes and fluorescein. These and other combinations of experiment and theory increase our understanding of the fluid dynamics of the tear film and its potential impact on the ocular surface.

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“…One of the best known is the Michelson who has had many applications ranging from measurements of sample thickness [2], temperature sensor [3], measurement of diffusion coefficients [4], among others.…”

Section: Theorymentioning

confidence: 99%

Michelson microscope interference objective for micro-structure topography measuring

2011

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Nowadays, the trends of miniaturization of sensors and inspection devices have been of major importance in science and technology. The characterization of microchips, integrated circuits, MEMS, and micro-sensors is important to determine their proper operation. Due to their element small size may have structural fails for improper handling of them. This paper proposes the use of a Michelson interferometric objective for the determination of topographical features in materials at micro and nanoscale level. The main advantage of this method is its non-invasive nature that allows testing in soft materials without damage. The Michelson interferometric microscope objective with a magnification of 5X illuminated with a 632nm He-Ne laser is used. Fringes that allow the study of the topography of these structures are properly analyzed. The acquisition of the interferograms was performed by a CCD, which are handled by the method of phase-stepping. An integrated circuit of a CCD as target is used. A reconstruction of the microscopic topography of the sample produced results with a statistical error in the topography of 12nm. Application of this method is to conduct quality control tests in manufacture of electronic components such as micro-chips and integrated circuits.

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Interferometric measurement of a diffusion coefficient: comparison of two methods and uncertainty analysis

Cited by 56 publications

References 38 publications

Controlling the Shape of Evaporating Droplets by Ionic Strength: Formation of Highly Anisometric Silica Supraparticles

Controlling the Shape of Evaporating Droplets by Ionic Strength: Formation of Highly Anisometric Silica Supraparticles

Dynamics and function of the tear film in relation to the blink cycle

Michelson microscope interference objective for micro-structure topography measuring

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