Printed Temperature Sensor Based on PEDOT: PSS-Graphene Oxide Composite

Abstract

Temperature sensing is an important parameter needed to be measured by the eSkin during the physical interaction of robots with real-world objects. Yet, most of the work on sensors in eSkin has focused on pressure sensing. Here we present a skin conformable printed temperature sensor with poly(3,4-ethylenedioxythiophene): poly (styr-enesulfonate) (PEDOT:PSS)-graphene oxide (GO) as a temperature sensitive layer and silver (Ag) as contact electrodes. The demonstration of PEDOT:PSS/GO as a highly temperature sensitive layer is the distinct feature of the work. The response of presented sensor observed over ∼25 • C (room temperature (RT)) to 100 • C, by measuring the variation in resistance across the GO/PEDOT:PSS layer showed ∼80% decrease in resistance. The sensitivity of the sensor was found to be 1.09% per • C. The sensor's response was also observed under static and dynamic bending (for 1000 cycles) conditions. The stable and repeatable response of sensor, in both cases, signifies strong adhesion of the layers with negligible delamination or debonding. In comparison to the commercial thermistor, the printed GO/PEDOT:PSS sensor is faster (∼73% superior) with response and recovery times of 18 s and 32 s respectively. Finally, the sensor was attached to a robotic hand to allow the robot to act by using temperature feedback.

Nanocomposites of PEDOT:PSS with Graphene and its Derivatives for Flexible Electronic Applications: A Review

“…Figure shows the fabrication process of the PEDOT:PSS/GO nanocomposite temperature sensor using a facile, cost‐effective, and scalable route. [ 129 ]…”

High-performance printed electronics based on inorganic semiconducting nano to chip scale structures

“…Vertically aligned NWs are usually transferred using CP technique [25], whereas transfer of laterally aligned structures such as NMs and NRs is generally performed using TP approach [46]. Exploiting these printing methods, high mobility materials/inks are used to fabricated variety of flexible electronic devices such as FETs [46,203], PDs [25,204], temperature and pressure sensors [205,206], radio frequency identification tags (RFID) [207], energy harvesters (solar cells, thermoelectric generators, piezoelectric generators, etc.) [82,148,182,184,208,209], stretchable interconnects [210] and many others [29,73].…”

Flexible Strain Sensor with NFC Tag for Food Packaging

“…The combination of smart sensors, with increased computational power and wireless connectivity, increasingly, by 5G networks, will enable new ways to analyse data and gain actionable insights. In this regard, several physical sensors have been developed for temperature [4][5][6], pressure [7,8], strain [9,10] and humidity [11,12] sensing. There is an increasing trend to wirelessly acquire the sensor data using technologies such as Radiofrequency Identification (RFID), Near Field Communication (NFC) and Bluetooth.…”

“…are light and conformable and have been used for sensor applications in different fields such as robotics [3,26], health and environmental monitoring [27][28][29]. These sensors can be fabricated using a variety of approaches such as printing methods [30,31], conductive fabrics [32,33] or polymer-based materials [6,34].…”