Session Chair: Jianyong Ouyang, National University of Singapore
10:30am - 11:00am Invited
Materials for 2D and 3D Stretchable Electronics
Hebrew University of Jerusalem, Israel
Functional printing brings additional performance of printed patterns, beyond graphic output, such as printed electrical circuits. Our research is focused on synthesis and formulations of conductive inks, their utilization in printed devices, and formation of inks for 3D printing of highly stretchable objects . These inks address major challenges in fabrication of flexible, stretchable and 3D electronics devices, in which the printing should be performed at sufficiently low temperatures that will not damage the polymeric substrates. Utilization of 3D and 4D printing technologies for fabrication of objects composed of shape memory polymers, elastomers and hydrogels will be demonstrated, for applications such as soft robotics, responsive electrical connectors and Internet of Things.
11:00am - 11:30am Invited
Multifunctional E-skins with Graphene on PVDF Nanofibers
Guozhen SHEN, Zheng LOU
Institute of Semiconductors, Chinese Academy of Sciences, China
Multifunctional e-skins with human-like perceptive characteristics that can sense pressure, strain, shear forces, and twist deformation has attracted attentions in recent years. Design of pressure or related sensors with ultra-sensitivity, rapid response speed and long-term stability is a key procedure to fulfill high performance electronic skins.
In this talk, we will introduce some of our recent work on design high sensitive pressure/gas sensors used for E-skins. Pressure sensors were first fabricated with rGO-encapsulated P(VDF-TrFe) nanofibers as th sensing element, which exhibited high sensitivity (15.6 kPa−1), low detection limit (1.2 Pa) and working voltage (1 V).
Multifunctional e-skins were then fabricated by integrating micro-supercapacitors, pressure sensors, gas sensors as well as photodetectors. As-fabricated multifunctional E-skins can detect the change of the environment conditions and physiological signs of health, like the functions of human skins and sense organs.
11:30am - 12:00pm Invited
Nanostructured Materials and Devices for Flexible and Wearable Electronics
Hong Kong University of Science and Technology, Hong Kong S.A.R. (China)
The rapidly growing market needs for wearable devices have propelled the research on energy efficient electronics, sensors, and flexible energy generation and storage devices. In many devices, nanomaterials and nanostructures can be utilized to improve device performance on various aspects. In this talk, we will introduce our recent research on nanomaterial based high performance and flexible sensors, solar cells and supercapacitors that can be potentially used for future wearable devices. Particularly, we have designed and fabricated several different types of nanowire based photosensors which demonstrated promising photoresponse. Nanostructures were used to build self-powered triboelectric touch sensors which can be used as human-machine interface. Various nanostructures have also been used to fabricate flexible thin film solar cells which can serve as power source of wearable devices. And we have recently developed a cost-effective inkjet printing method to fabricate high resolution and flexible nanostructured electrodes for high performance planar supercapacitors which can be used as energy storage devices for wearable electronics. Overall, leveraging the advantages of nanostructures can lead to significant improvement on device performance as well as mechanical flexible.