Micro-dressing of a carbon nanotube array with MoS2 gauze

Abstract

Few-layer MoS₂ film has been successfully assembled over an array of CNTs. Using different focused laser beams with different wavelengths, site selective patterning of either the MoS₂ film or the supporting CNT array is achieved. This paves the way for applications and investigations into the fundamental properties of the hybrid MoS₂/CNT material with a controlled architecture. Through Raman mapping, straining and electron doping of the MoS₂ film as a result of interaction with the supporting CNT array are detected. The role of the MoS₂ film was further emphasized with a lower work function being detected from Ultra-violet Photoelectron Spectrsocopy (UPS) measurements of the hybrid material, compared to the CNT array. The effect of the changes in the work function was illustrated through the optoelectronic behavior of the hybrid material. At 0 V, 3.49 nA of current is measured upon illuminating the sample with a broad laser beam emitting laser light with a wavelength of 532 nm. With a strong response to external irradiation of different wavelengths, and changes to the power of the excitation source, the hybrid material has shown potential for applications in optoelectronic devices.