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Stretchable pH sensing patch in a hybrid package

Dang, Wenting; Manjakkal, Libu; Lorenzelli, Leandro; Vinciguerra, Vincenzo; Dahiya, Ravinder


Wenting Dang

Leandro Lorenzelli

Vincenzo Vinciguerra

Ravinder Dahiya


This work presents a novel stretchable pH sensing patch to detect the pH in body fluid which is one of the most important parameters in human health monitoring. The sensing patch is a hybrid package comprising of polyimide/gold-based stretchable interconnects and graphite composite-based flexible pH sensor. With the integration of stretchable interconnects, the patch is able to withstand external stretching up to 50% longer than its original length. Moreover, the electrical behavior of the patch does not degrade as studied by the real-time resistance investigation. In order to protect the connecting electrodes and wirings from direct contacting with solution under analysis, the sensing patch is encapsulated with elastic polymer with the active sensing area exposed. The fabricated patch reveals a high pH sensitivity of 36.2 μA/pH in the pH range between 5 and 9 which is validated through electrochemical and electroanalytical studies.

Presentation Conference Type Conference Paper (Published)
Conference Name 2017 IEEE SENSORS
Start Date Oct 29, 2017
End Date Nov 1, 2017
Online Publication Date Dec 25, 2017
Publication Date 2017
Deposit Date Jul 29, 2022
Publisher Institute of Electrical and Electronics Engineers
Book Title 2017 IEEE SENSORS
Keywords hybrid package, stretchable interconnects, pH sensor, electrochemistry, graphite composite
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