奈米工程與微系統研究所　書報討論

Seminar of Inst. NanoEngineering and MicroSystems

Yao-Joe Yang

Director General, ITRC, NARLabs

Professor, Dept. of M. E., NTU

 Microdevices using Soft Materials

Abstract

This talk presents two microdevices realized by using soft materials: a microgripper that can be wirelessly manipulated using magnetic fields, and a tactile sensor array that employs the tunneling piezoresistive effect for achieving high sensitivity.

The proposed microgripper can move freely in liquids when driven by direct current (dc)

magnetic fields, and perform a gripping motion by using alternating current (ac) magnetic fields. The gripper is fabricated from a biocompatible hydrogel material that can be employed for intravascular applications. The actuation mechanism for gripping motions is realized by controlling the exposure dose on the hydrogel composite during the lithography process. The preliminary characterization of the device is also presented. The measurement results show that the gripping motion reached a full stroke at approximately 38 ºC.

The proposed highly-sensitive tactile sensor is made by dispersing multi-wall carbon nanotubes into polydimethylsiloxane (MWCNT and PDMS) polymer patterned with microdome structures using nylon membrane filter substrate. The fabricated sensing device features advantages such as ultra-high sensitivity, flexibility, and simple fabrication process. The tunneling piezoresistive effects of the interlocked microdome structures with different MWCNT concentrations are demonstrated. The resistance change of the sensor array due to different types of motions was measured.                     

15:30-17:20 on Apr. 16(Mon), 2018 at Room 108 of Eng. Building I

Host：Prof. J.Andrew Yeh jayeh@mx.nthu.edu.tw Ext:42912

TA：Eva Huang     crazy8826@gmail.com