Cold Spray Deposition of Graphene Nanoplatelets on PDMS

Scalable Flexible Pressure Sensor for Wearable Applications

        📄 Publication Status: Submitted to ACS Applied Materials & Interfaces

        📅 Period: 2024 – 2025

        🧪 Techniques: Cold Spray | Flexible Substrates | Sensor Fabrication

        🎯 Focus: Scalable, binder-free conductive coating on PDMS

Cold Spray on PDMS — Cold-sprayed GNP coating on flexible PDMS substrate

SEM Morphology — Surface morphology showing microstructured deposition

GNP Structure — High-resolution SEM of graphene nanoplatelet network

Wearable Setup — Wearable sensing system with embedded electronics

Electrical Response — Electrical response under different loading conditions

Project Overview

This project demonstrates a scalable cold spray approach for depositing graphene nanoplatelets (GNP) onto flexible PDMS substrates to develop wearable pressure sensors. Unlike conventional thin-film techniques, this method enables room-temperature, binder-free deposition, making it suitable for soft and stretchable electronics.

This work highlights a manufacturing-friendly alternative to conventional thin-film deposition, enabling rapid prototyping and scalable production of flexible sensors.

Key Highlights

Binder-free deposition of conductive graphene network
Compatible with flexible and soft substrates (PDMS)
Stable electrical response under mechanical deformation
Demonstrated wearable sensing capability

Performance Snapshot

Stable electrical response under repeated loading
Maintained conductivity under bending
Suitable for wearable sensing applications

Outcome

The cold-sprayed GNP films exhibited reliable electrical behavior and maintained conductivity under bending and compression. This approach provides a simple and scalable pathway for developing next-generation wearable sensors.

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