Jae Hee Song

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A hydrodynamic scaling model of droplet actu-ation in an electrowetting-on-dielectric (EWD) actuator is presented that takes into account the effects of contact angle hysteresis, drag from the filler fluid, drag from the solid walls, and change in the actuation force while a droplet traverses a neighboring electrode. Based on this model, the threshold(More)
Rationally controlled growth of inorganic semiconductor nanowires is important for their applications in nanoscale electronics and photonics. In this article, we discuss the rational growth, physical properties, and integration of nanowires based on the results from the authors' laboratory. The composition, diameter, growth position, and orientation of the(More)
Gold nanorods have been synthesized by photochemically reducing gold ions within a micellar solution. The aspect ratio of the rods can be controlled with the addition of silver ions. This process reported here is highly promising for producing uniform nanorods, and more importantly it will be useful in resolving the growth mechanism of anisotropic metal(More)
Effective vein visualization is clinically important for various point-of-care applications, such as needle insertion. It can be achieved by utilizing ultrasound imaging or by applying infrared laser excitation and monitoring its absorption. However, while these approaches can be used for vein visualization, they are not suitable for point-of-care(More)
Electrochemically prepared Au nanorods were used as seeds for the overgrowth of thin shells of gold, silver, and palladium by using a mild reducing agent, ascorbic acid, in the presence of surfactants at ambient condition. The unique crystal facets of the starting nanorods results in anisotropic crystal overgrowth. The overgrowth rates along different(More)
Recent research in the field of nanometer-scale electronics has focused on two fundamental issues: the operating principles of small-scale devices 1 and schemes that lead to their realization and eventual integration into useful circuits. 2 The availability of a nanoscale toolbox is the key for this field of research. Among the many potential building(More)
Currently, there is intensive research driving toward developing suitable one-dimensional (1D) conducting molecular wires because of their potential use as building blocks for molecular-scale electronic devices. 1 One appealing approach for obtaining molecular wires is the disassembly of quasi-1D crystals 2,3 such as LiMo 3 Se 3 into structurally and(More)
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