Micropatterning by Wettability Control of the <font>SiO</font><sub>2</sub>  Surface with Ultraviolet Irradiation

Huang, Lan; Z, Yu; Liao, Jianhui; Xu, Lina; Gu, Ning; Shen, Haojing

doi:10.1142/s0218625x03005414

Cited by 2 publications

(2 citation statements)

References 6 publications

(6 reference statements)

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“…19(d)] Light can drive droplet motion when the surface is coated with a photosensitive material. Static optowetting, i.e., a change in contact angle change due to uniform light irradiation, has been reported ͑Wang et al, 1997; Abbott et al, 1999;Shin and Abbott, 1999;Miyauchi et al, 2002;Huang et al, 2003͒. Furthermore, droplet motion has been driven using gradients in light intensity ͑Ichimura et Oh et al, 2002͒.…”

Section: B Surfaces With Wettability Gradientsmentioning

confidence: 99%

Microfluidics: Fluid physics at the nanoliter scale

2005

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Microfabricated integrated circuits revolutionized computation by vastly reducing the space, labor, and time required for calculations. Microfluidic systems hold similar promise for the large-scale automation of chemistry and biology, suggesting the possibility of numerous experiments performed rapidly and in parallel, while consuming little reagent. While it is too early to tell whether such a vision will be realized, significant progress has been achieved, and various applications of significant scientific and practical interest have been developed. Here a review of the physics of small volumes ͑nanoliters͒ of fluids is presented, as parametrized by a series of dimensionless numbers expressing the relative importance of various physical phenomena. Specifically, this review explores the Reynolds number Re, addressing inertial effects; the Péclet number Pe, which concerns convective and diffusive transport; the capillary number Ca expressing the importance of interfacial tension; the Deborah, Weissenberg, and elasticity numbers De, Wi, and El, describing elastic effects due to deformable microstructural elements like polymers; the Grashof and Rayleigh numbers Gr and Ra, describing density-driven flows; and the Knudsen number, describing the importance of noncontinuum molecular effects. Furthermore, the long-range nature of viscous flows and the small device dimensions inherent in microfluidics mean that the influence of boundaries is typically significant. A variety of strategies have been developed to manipulate fluids by exploiting boundary effects; among these are electrokinetic effects, acoustic streaming, and fluid-structure interactions. The goal is to describe the physics behind the rich variety of fluid phenomena occurring on the nanoliter scale using simple scaling arguments, with the hopes of developing an intuitive sense for this occasionally counterintuitive world. CONTENTS

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Section: B Surfaces With Wettability Gradientsmentioning

confidence: 99%

Microfluidics: Fluid physics at the nanoliter scale

2005

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“…As the surface area to volume ratio scales to the inverse of the device dimension, surface effects happen to be very prominent in microfluidics-based systems (Lee et al 2002;Huang et al 2003;Gascoyne & Vykoukal 2004;Madou 2002). This has been typically explored in the generation of controlled monodisperse microdroplet between two immiscible fluids (Thorsen et al 2001) and the radius of the droplet has been shown scale as the inverse of Capillary number.…”

Section: Developing Surface Effectsmentioning

confidence: 99%

Biomicrofluidics: Recent trends and future challenges

Das

Chakraborty

2009

Sadhana

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Biomicrofluidics is an active area of research at present, exploring the synergy of microfluidics with cellular and molecular biology, biotechnology, and biomedical engineering. The present article outlines the recent advancements in these areas, including the development of novel lab-on-a-chip based applications. Particular emphasis is given on the microfluidics-based handling of DNA, cells, and proteins, as well as fundamental microfluidic considerations for design of biomedical microdevices. Future directions of research on these topics are also discussed.

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Micropatterning by Wettability Control of the SiO₂ Surface with Ultraviolet Irradiation

Cited by 2 publications

References 6 publications

Microfluidics: Fluid physics at the nanoliter scale

Microfluidics: Fluid physics at the nanoliter scale

Biomicrofluidics: Recent trends and future challenges

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Micropatterning by Wettability Control of the SiO2 Surface with Ultraviolet Irradiation

Cited by 2 publications

References 6 publications

Microfluidics: Fluid physics at the nanoliter scale

Microfluidics: Fluid physics at the nanoliter scale

Biomicrofluidics: Recent trends and future challenges

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Micropatterning by Wettability Control of the SiO₂ Surface with Ultraviolet Irradiation