MRS Meetings and Events


SB12.05.08 2022 MRS Fall Meeting

Broadband Mechanoresponsive Liquid Metal Sensors

When and Where

Nov 29, 2022
8:00pm - 10:00pm

Hynes, Level 1, Hall A



Md Saifur Rahman1,Julia Huddy1,Andrew Hamlin1,William Scheideler1

Dartmouth College1


Md Saifur Rahman1,Julia Huddy1,Andrew Hamlin1,William Scheideler1

Dartmouth College1
Stretchable electronics have the fundamental advantage of matching the complex geometries of<br/>the human body, providing novel opportunities for real-time biomechanical sensing. We report a<br/>new method for high frequency AC-enhanced resistive mechanical sensing that leverages the<br/>deformability of liquid metals to enhance low-power detection of mechanical stimuli in wearable<br/>electronics. The fundamental mechanism for this enhancement is the geometrical modulation of<br/>the AC skin effect, which induces current crowding at the surface of a liquid metal trace. We<br/>apply 1-50 MHz excitation in combination with DC sensing to quantitatively pinpoint<br/>mechanical modes of deformation such as stretching in-plane and compression out-of-plane that<br/>are otherwise impossible to distinguish by traditional methods. This novel sensing method,<br/>which we explore by FEA simulations, is experimentally employed in a glove to simultaneously<br/>detect various hand gestures and tactile forces as well as a respiratory sensor band to monitor<br/>breathing rate. In addition to this multifunctionality, we show how this AC sensing modality can<br/>enable high SNR readout at 100X lower power consumption compared with DC, enabling a new<br/>generation of efficient wearable radio-frequency (RF) systems for haptics and biomedical<br/>sensing.

Symposium Organizers

Piero Cosseddu, University of Cagliari
Lucia Beccai, Istituto Italiano di Tecnologia
Ingrid Graz, Johannes Kepler University
Darren Lipomi, University of California, San Diego

Symposium Support

Materials Horizons

Session Chairs

Lucia Beccai
Piero Cosseddu
Darren Lipomi

In this Session

Materials-Enabled Stretchable, Flexible and Wearable Electronics and Their Biomedical Applications

Triboresistive Touch Sensing—Grid-Free Touch Point Recognition Based on Monolayered Ionic Power Generators

A Strategy Reducing Interfacial Stress by Placing Pores Around Serpentine Electrodes for Highly Durable Stretchable Electronics

High-Power Photonic Skin for Wearable Photodynamic Therapeutics of Skin Cancer

A Wearable System for Detecting Hand Motion Using Strain Sensors

Development of Kirigami-Based Stretchable Electronics for Wearable Electronic Devices

Broadband Mechanoresponsive Liquid Metal Sensors

Tissue-Adaptive Bionogel Based on Piezo-Driven Ion Confinement for Mechanical Biosignal Acquisition System

Long-Term In Vivo Operation of Implanted Cardiac Nanogenerators in Swine

An Intrinsically Stretchable Multi-Biochemical Sensor for Sweat Analysis Using a Photo-Patternable Silicone Elastomer

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Publishing Alliance

MRS publishes with Springer Nature