Cover Page October-2018-Advanced Materials Letters

Advanced Materials Letters

Volume 9, Issue 10, Article ID 692-695, October 2018
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The cover describes the development of nanofibers with encapsulated growth factors has been emerged as a promising approach in neo-tissues applications. The proposed nanofibrous systems provide a novel approach to both simulate the extra-cellular matrix for cell adhesion and also for localized delivery of signaling molecules and growth factors. Growth factors could be loaded into nanofibers using different techniques including physical adsorption, covalent bonding or encapsulation.


Design of a novel three arm electrothermal microgripper with multiple degrees of control

Muaiyd H. M. Al-Zandi*, Changhai Wang 

Institute of Sensors Signals and Systems School of Engineering and Physical Sciences Heriot-Watt University Edinburgh, UK

Adv. Mater. Lett., 2018, 9 (10), pp 692-695

DOI: 10.5185/amlett.2018.2072

Publication Date (Web): Jul 18, 2018

E-mail: mha43@hw.ac.uk

Abstract


A novel three arm microgripper design is presented in this paper.  It is a SU-8 based design with integrated microheaters. It is composed of three microactuators: two are based on a design for bi-directional beam deflection and the other is a tri-directional actuator. The actuators are simulated and analyzed using COMSOL Multiphysics tool. The first actuator has displacement of about 12 μm and 35 μm respectively when heaters h1 and h2 are used in operation and the heater temperature is about 200°C. The second actuator has a displacement of about 12 μm in all three directions. This microgripper is flexible and can be used to grasp a wide range of sizes of micro-particles. In addition, it has more freedoms of control by using the different combinations of the 8 embedded microheaters for electrothermal actuation. 

Keywords

Microgripper, micromanipulator, electrothermal actuator, SU-8.

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