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On‐chip temperature sensing on a micro‐ to nanometer scale is becoming more desirable as the complexity of nanodevices keeps increasing and their downscaling continues. The continuation of this trend makes thermal probing and management more and more challenging. This highlights the need for scalable and reliable temperature sensors, which have the potential to be incorporated into current and future device structures. Here, it is shown that U‐shaped graphene stripes consisting of one wide and one narrow leg form a single material thermocouple that can function as a self‐powering temperature sensor. It is found that the graphene thermocouples increase in sensitivity with a decrease in leg width, due to a change in the Seebeck coefficient, which is in agreement with previous findings and report a maximum sensitivity of ΔS ≈ 39 μV K−1. [ABSTRACT FROM AUTHOR]

Graphene Thermocouples: Single-Material Graphene Thermocouples (Adv. Funct. Keywords: 2D; graphene; Seebeck coefficient; single-material; thermocouple EN 2D graphene Seebeck coefficient single-material thermocouple 1 1 1 05/27/20 20200526 NES 200526 In article number 2000574, Achim Harzheim, Pascal Gehring, and co-workers report U-shaped graphene strips comprising one wide and one narrow leg that form a single material thermocouple due to the increased influence of electron edge scattering in a narrow channel. 2D, graphene, Seebeck coefficient, single-material, thermocouple. [Extracted from the article]