April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

Event Supporters

2024 MRS Spring Meeting
SB10.05.05

Potentiometric Wearable Sensors with a Laser Engraved Graphene Layer as Transducer

When and Where

Apr 24, 2024
9:45am - 10:00am
Room 429, Level 4, Summit

Presenter(s)

Co-Author(s)

Maral Mousavi1,Farbod Amirghasemi1,Abdulrahman Al-Shami1,Victor Ong1

University of Southern California1

Abstract

Maral Mousavi1,Farbod Amirghasemi1,Abdulrahman Al-Shami1,Victor Ong1

University of Southern California1
Laser-induced graphene has gained great attention recently for sensing devices. LIGs are generated through the process of irradiating carbon-rich polymers, primarily polyimide, using a laser beam. This procedure induces localized photothermal reactions, resulting in the conversion of SP3 carbon atom hybridization into a three-dimensional graphitic-like structure. This maskless, scalable, simple, reproducible, cost-effective, and fast technique produces high-quality graphene layers with outstanding flexibility, electrical conductivity, and electrocatalytic properties instead of using the conventional time-consuming, expensive, and complicated methods such as wet chemistry, ink-jet printing, and chemical vapor deposition (CVD). In this work, we discuss surface modification and properties of graphene for achieving a stable interfacial potential in contact with a lipophilic sensing membrane, in a potentiometric readout mode. Specifically, surface topography and hydrophilicity of the material impacts the long-term and short-term properties of the wearable sensors. We will show how the engraving conditions impact water layer formation and drift of sensors, and how a highly stable readout can be achieved through surface modification. We use bio-inspired organic receptors to achieve ion specific binding at the electrode surface and generate biomarker specific signal.

Keywords

C

Symposium Organizers

Simone Fabiano, Linkoping University
Sahika Inal, King Abdullah University of Science and Technology
Naoji Matsuhisa, University of Tokyo
Sihong Wang, University of Chicago

Symposium Support

Bronze
IOP Publishing

Session Chairs

Sahika Inal

In this Session