Fig. 2
From: Gradient Annealing as a New Strategy to Fabricate Gradient Nanoparticle Array on Microwires
a Schematic of the Ga-doped microwire heating device. b The optical image of hotspot transport when the high voltage was applied. c The hotspot position under forward and reverse bias. d Schematic diagram of the impurity migration in the Joule heated microwire. e The regulated resistance along the microwire after impurity migration. f The optical/SEM image of the microwire after dopants redistribution and the EDS line scan spectrum along the microwire. g Line-scan of the resistance along the microwire