Henry K. Chu

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Pick-and-place of micro-scale objects is essential for many microscopic tasks. For more sophisticated tasks, grasping and manipulating objects with two independent tools can enhance the capability and the dexterity of the tools. In this work, a dual-arm micromanipulation system equipped with two tungsten probes was employed for the manipulation of a sphere.(More)
  • Henry K. Chu, Z Huan, J K Mills, J Yang, D Sun
  • Lab on a chip
  • 2015
Cell manipulation is imperative to the areas of cellular biology and tissue engineering, providing them a useful tool for patterning cells into cellular patterns for different analyses and applications. This paper presents a novel approach to perform three-dimensional (3D) cell manipulation and patterning with a multi-layer engineered scaffold. This(More)
This paper presents the modeling and development of a micromanipulation system that can provide continuous force to manipulate a micro-particle through an externally applied magnetic field. This system consists of six electromagnetic coils and the size of the micro-particle to be manipulated is less than 30μm. The magnetic field maps generated from(More)
This paper presents the fabrication of a three-dimensional microcoil through the technique of microassembly. The microcoil design is comprised of nine out-of-plane micro-sized windings. Each winding was assembled onto the base substrate orthogonally by a robotic manipulator through microassembly. In contrast to the conventional serial pick-and-place(More)
Automatic manipulation and patterning of biological cells into an artificial scaffold is an imperative step in the production of high-quality tissue for tissue transplantation. This paper examines the incorporation of dielectrophoresis into a three-dimensional (3D) scaffold body for batch manipulation and patterning of cells. To facilitate(More)
This paper presents the design of a magnetic micromanipulation system for wireless control of a single magnetic bead. Six orthogonally aligned electromagnetic coils were used to generate the magnetic fields for the manipulation and modeling equations were developed to evaluate the required inputs for each coil for precise closed-loop control of the magnetic(More)
Dielectrophoresis (DEP) has widely been used for manipulation and patterning of biological cells. In this paper, a novel multi-layer scaffold structure was designed for patterning cells in 3D via dielectrophoresis. Honeycomb patterns were integrated in each layer of the structure in order to pattern cells into bone-like tissues. When a voltage was supplied(More)
Patterning and assembly of biological cells in a 3D structure represents an important process in artificial tissue engineering. This paper presents the design of a multi-layer electrode scaffold used to assemble biological cells into a 3D pattern. Through suppling voltage to the multi-layer scaffold, three-dimensional electric fields can be established to(More)
A novel biodegradable and conductive composite consisting of magnesium (Mg), polypyrrole-block-ploycaprolactone (PPy-PCL), and poly(lactic-co-glycolic acid) (PLGA) is synthesized in a core-shell-skeleton manner for tissue engineering applications. Mg particles in the composite are first coated with a conductive nanostructured PPy-PCL layer for corrosion(More)
Precise micropart alignment is a crucial factor in most gripper-based microassembly processes. For the micropart to be grasped or manipulated, these processes require the micropart to be positioned and oriented properly for the microgripper. At present, many of the these processes still rely on operators to monitor and align the micropart manually through(More)