Shape of a meniscus in a rotating vertical tube

Aronson, Michel P.; Princen, H.M

doi:10.1039/f19787400555

Cited by 5 publications

(1 citation statement)

References 1 publication

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“…The rotation of the optical fibre and the vial in fact affects the shape of the meniscus separating the two immiscible fluid phases (HF and overlayer) 31 and modifies the wettability of the optical fibre surface, thus changing the shape of the nanotips and roughness.…”

Section: A Experimental Resultsmentioning

confidence: 99%

Optical fibre nanotips fabricated by a dynamic chemical etching for sensing applications

Barucci

Cosi

Giannetti

et al. 2015

Journal of Applied Physics

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Nanoprobe tips are key components in many applications such as scanning probe microscopes, nanoscale imaging, nanofabrication and sensing. This paper describes a dynamic chemical etching method for the fabrication of optical nanoprobes. The tips are produced by mechanically rotating and dipping a silica optical fibre in a chemical etching solution (aqueous hydrofluoric acid) covered with a protection layer. Using different dynamic regimes of the mechanical movements during the chemical etching process, it is possible to vary the cone angle, the shape, and the roughness of the nanoprobes. It is found that the tip profiles are determined by the nonlinear dynamic evolution of the meniscus of the etchant near the fibre. Computational fluid dynamic simulations have been performed, showing that different flow regimes correspond to different shear forces acting on the forming nanotip, in agreement with experimental results. With this method, a high yield of reproducible nanotips can be obtained, thus overcoming the drawbacks of conventional etching techniques. Typical tip features are short taper length (∼200 μm), large cone angle (up to 40°), and small probe tip dimension (less than 30 nm).

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Section: A Experimental Resultsmentioning

confidence: 99%

Optical fibre nanotips fabricated by a dynamic chemical etching for sensing applications

Barucci

Cosi

Giannetti

et al. 2015

Journal of Applied Physics

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Determination of interfacial tension by differential capillary rise

Ramakrishnan

Hartland

1981

Proc. Indian Acad. Sci. (Chem. Sci.)

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The determination of interfacial tension by differential capillary rise

Ramakrishnan

Hartland

1981

Proc. Indian Acad. Sci. (Chem. Sci.)

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A method for directly determining iaterfaeial tension without iteration from the difference in height between two capillaries is presont(xl. An experimental technique is described for organic liquids both fighter and heavier than water, in which the menisci recede over surfaces wetted by the aqueous phase, thus providing the most favourable conditions for zero contact angle. The values detea'minod experimentally using tables prepared from the known shapes of sessile interfaces agree weal with aco~pted values of the iatorfaeial tension.

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Shape of a meniscus in a rotating vertical tube

Cited by 5 publications

References 1 publication

Optical fibre nanotips fabricated by a dynamic chemical etching for sensing applications

Optical fibre nanotips fabricated by a dynamic chemical etching for sensing applications

Determination of interfacial tension by differential capillary rise

The determination of interfacial tension by differential capillary rise

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