The Preparation and Properties of Microheater Based on Graphene Oxide and Micro/Nanofiber

An optical technique is developed by depositing graphene oxide (GO) onto a micro/nanofiber (MNF), which can act as a novel light-driven microheater based on the strong evanescent field from MNF and the photothermal property of GO. Excited by the low-power near-infrared light, GO-MNF is capable of initiating the phase transition of surrounding solvent (such as N,N-dimethylformamide, deionized water) to generate photothermal microbubbles. As a result, in the N,N-dimethylformamide, the microbubbles grows in a certain cycle, and stirs the liquid repeated. In the microfluidic chip, the microbubbles can manipulate micro/nano particles and wires. In the deionized water, the microbubble is stable and not easy to break, which can be used to gather particles. The microheater has the superiorities of easy fabrication, small size, low loss, low excitation power, and high efficiency, which would have prospective applications in micro-electromechanical systems, lab-on-a-chip, and other techniques.