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AP Seminar - Bio-inspired Nanoionic Materials for Energy & Information Related Device Applications

Poster for Website_Prof Chu_17 Jun 2024
  • Date

    17 Jun 2024

  • Organiser

  • Time

    10:00 - 11:00

  • Venue

    CD620, 6/F, Wing CD, PolyU Map  


Prof. Dewei Chu


Inspired by nature, we have developed new nanoionic materials and devices which can mimic the functions of human brain and skin with low power consumption through engineering the ion migration in nanoionic devices. For example, a new design of an artificial perceptual system integrating ZnObased synaptic devices with Pt/carbon nanofibersbased strain sensors for stimuli detection and information processing is presented. The device can emulate various essential functions, such as shortterm/longterm plasticity, pairedpulse facilitation, excitatory postsynaptic current, and synaptic plasticity depending on the number, frequency, amplitude, and width of the applied pulses. Inspired by electric eels, harvesting energy from ubiquitous moisture is attracting growing interest in wearable electronics. However, several proposed mechanisms, such as the intrinsic gradient of polar functional groups principle and electrokinetic effect perspective, are in wide discrepancy. Here, through the combination of theoretical calculations involving time dimension on material's moisturizing process and experimental analyses, it is revealed the working principle through the water molecule triple roles in driving moisture electric generators (MEGs): 1) intrinsic H2O absorption on the material surface and splitting into hydroxy group and proton due to the polarizability of the material surface determined by the static electric potential of the materials. This process induces the electrochemical potential difference of the materials via the work function changes; 2) freely diffused protons derived from the H2O splitting work as the ions charge carriers; 3) via the hydrogen bond of the water molecules to drive charge carriers diffuse between opposite electrodes, maintaining the internal circuit current flow. This work may open a new era of advancement for a new energy conversion technology able to directly power wearable electronic devices.


Keynote Speaker

Prof. Dewei Chu


School of Materials Science and Engineering

University of New South Wales

Prof. Dewei Chu ‘s research interest is in the field of nanoionic materials for the applications of information and energy storage/conversion devices. Chu leads the Nanoionic Materials Group at UNSW with >35 researchers. His group targets to develop solution-processed, printable and flexible nanoionic materials for cost-effective and energy-efficient wearable electronics and IoT devices.  Prof. Chu received his PhD degree in Materials Science in Shanghai Institute of Ceramics in 2008. Chu has a strong record of partnering with international firms such as Panasonic, TOTO, Strategic Elements, and Weir Minerals. Chu has published 12 patents, 4 book chapters, and >230 peer-reviewed journal papers with total citations> 10900, h-index=56. Since 2011 Chu has successfully attracted competitive research funding of over $23M in Australia from various funding sources, such as tertiary, governmental, and commercial organizations. Chu has received 6 competitive fellowship awards including JSPS Fellowship, the Australian Research Council APD fellowship, the Future Fellowship, and Mid-career Industry Fellowship.

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