This paper reports a self-aligned three-dimensional process (3D-SOULE) that incorporates batch-mode micro ultrasonic machining (μUSM), lapping and micro electro-discharge machining (μEDM) for fabrication of concave and mushroom-shaped spherical structures from hard and brittle materials. To demonstrate the process, 1 mm structures are fabricated from glass and ruby spheres. The μEDM technique i...

Urchin-like NiCo2S4 sub-micron spheres integrated with nano-sized and micro-sized structures, which were synthesized via a facile one-pot method, deliver efficient electrocatalytic activities for oxygen reduction and evolution reactions. The excellent electrocatalytic property of NiCo2S4 sub-micron spheres is originated from their unique urchin-like microstructure, composition and d-electronic ...

This letter reports on the self-alignment of glass spheres using a liquid interacting with an electric field for surface modification. The liquid is electrically attracted and trapped between the glass spheres as a result of the electromeniscus phenomenon. The liquid between the spheres removes the electric charge on the spheres, enhances the attractive forces between the spheres, and works as ...

Highly active and stable MoS2/carbon hierarchical spheres with abundant active edge sites were fabricated by a simple micro-emulsion procedure where PVP was used as the carbon source, and carbon disulfide as the sulfur source and oil phase in micro-emulsion to control the morphology of MoS2. Hierarchical spheres of MoS2/carbon with a diameter of ca. 500 nm were obtained and characterized by sca...

We combine ultrasonic trapping and capillary electrophoresis (CE) with the goal to detect ultra-low concentrations of proteins via size-selective separation and enrichment of antibody-coated latex spheres. An 8.5 MHz standing ultrasonic wave is longitudinally coupled into the sub-100- micro m diam capillary of the CE system. Competition between acoustic and viscous forces result in in-flow sepa...

To design and develop a micro-tweezer for the application of tissue manipulation. This micro-tweezer isolate the individual stem cell spheres from culture media. This provide the easier way to study a individual cell. The total displacement in micro-tweezer tip to pick and place the individual cell is measured to certain applied voltage. The total stress, displacement and temperature rise is an...

As cartilage tissue has limited repair capacities, tissue engineering has emerged as a promising alternative for cartilage repair. The scaffold is a primary component of the tissue engineerig design, yet little inormation exists regarding the effects of polymer and scaffold properties on tissue growth. In this study, we have developed a novel scaffold, PLG micro spheres, for use in cartilage ti...

All naturally occurring and most man-made solid particles are nonspherical. Examples include air-pollutants in the nano- to micro-meter range as well as blood constituents, drug particles, and industrial fluid-particle streams. Focusing on the modeling and simulation of inhaled aerosols, theories for both spherical and nonspherical particles are reviewed to analyze the contrasting transport and...