Akintunde Ibitayo Akinwande

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This paper reports the design, fabrication, and experimental characterization of a fully microfabricated planar array of externally fed electrospray emitters that produces heavy molecular ions from the ionic liquids EMI-BF4 and EMI-Im. The microelectromechanical systems (MEMS) electrospray array is composed of the following two microfabricated parts: 1) an(More)
This paper reports the design, fabrication, and experimental characterization of a planar array of micro-fabricated electrospray emitters intended for space propulsion applications in micro–satellites. The engine uses the ionic liquid EMI-BF4 as propellant. Electrospray engines take advantage of the electrohydrodynamic effect known as Taylor cone to produce(More)
BACKGROUND Diabetes mellitus is a disorder of carbohydrate metabolism and is associated with oxidative reactions. OBJECTIVE The present study is to determine the activities of catalase, lipid peroxidation, glucose, protein, cholesterol and triglyceride concentrations in the liver and kidney in alloxan-induced diabetes in female and male rats. In addition,(More)
We describe a flexible multisite microelectrode for insect flight biasing using neural stimulation. The electrode is made of two layers of polyimide (PI) with gold sandwiched in between in a split-ring geometry. The split-ring design in conjunction with the flexibility of the PI allows for a simple insertion process and provides good attachment between the(More)
For the first time, we demonstrate control of organic thinfilm transistor’s (OTFT) threshold voltage (VT) by modifying the gate work function. We present a near-room-temperature, fully lithographic process to fabricate integrated pentacene dual VT OTFTs suitable for large-area and flexible mixed signal circuits. Platinum and aluminum are used as the gate(More)
The influence of fat in chick diets containing 18, 21, and 24% protein on growth and liver lipid content, glucose 6-phosphate, and 6-phosphogluconate dehydrogenases, and aldolase activities was evaluated. Twelve percent fat in diets containing 21 and 24% protein increased the rate of growth. The fat level also decreased liver lipid content at 24% dietary(More)
Vernonia amygdalina Del. (Family Compositae) is used in Nigerian folk medicine as a tonic and remedy against constipation, fever, high blood pressure, and many infectious diseases. We have evaluated the hepatoprotective and antioxidant effects of an aqueous extract of V. amygdalina leaves against acetaminophen-induced hepatotoxicity and oxidative stress in(More)
This paper reports the design, fabrication, and experimental characterization of an internally fed linear array of electrospray emitters intended for space propulsion applications. The engine uses doped formamide as propellant and operates in the single-Taylor-cone droplet emission regime. The engine implements the concept of hydraulic and electrodynamic(More)
This paper describes a packaging concept for precise hand-assembly of microelectromechanical systems (MEMS) subsystems that uses mesoscaled deep-reactive ion etching (DRIE) patterned passive deflection spring clusters. The method is intended for applications that require decoupling of subsystem process flows to simplify device fabrication in order to attain(More)
This paper reports the design, fabrication, and characterization of low-cost out-of-plane quadrupole mass filters that use commercially available dowel pins as electrode rods. The quadrupoles implement a 3-D MEMS packaging technology that relies on deep-reactive ion etching (DRIE)-patterned deflection springs for alignment. Quadrupoles with rod diameter(More)