In-Situ Vertical-Contact Engineering of Laser-Induced Graphene Nanotips for Ultra-Sensitive Humidity Sensors.

ABSTRACT: Advancements in laser-induced graphene (LIG) technology enables the streamlined fabrication of 3D porous graphene-based humidity sensors. However, conventional LIG-based humidity sensors employing lateral-contact configurations often exhibit limited responsivity, owing to their partially exposed structures and dominant subsurface current pathways. This study presents a novel vertical-contact architecture that utilizes vertically aligned LIG nanotips for ultra-sensitive humidity detection. Single-pulse laser irradiation induces localized growth of the LIG nanotips, simultaneously forming in-situ vertical contacts with both the top and bottom graphene electrodes. This fully exposed structure provides a highly efficient sensing interface. By adjusting the air-gap height between the electrodes

SUBMITTER: Kim KW 

PROVIDER: S-EPMC12393033 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature