Micro/Nano 3D Structures Made by Thin Film Rolling

Abstract

Evaluation of: Mendach S, Songmuang R, Kiravittaya S, Rastelli A, Benyoucef M, Schmidt OG: Light emission and wave guiding of quantum dots in a tube. Appl. Phys. Lett. 88, 111–120 (2006) [1] . Recently, the fabrication of microtubes with InAs quantum dots as light emitters in the tube walls by novel roll-up technology was reported. Unique light emission of quantum dots in the roll-up tube and the wave-guiding effect of the tube are demonstrated. The results are very promising for producing a flexible high quality factor optical resonator. The particular interest of this paper is the novel rolling-up 3D structure fabrication and the integration of functional materials into the wall of the tubes. Roll-up 3D structure fabrication is based on the combination of thin film coating and conventional lithography. The roll-up process for forming 3D structures is much easier than the other 3D structure fabrication technologies. In addition, the selections of the materials for rolled-up 3D structures are flexible. I present the processes of roll-up light-emitting tubes used by Mendach and colleagues, introduce the significance of incorporating other materials into the tube wall and discuss the potential applications of roll-up technology in the structure fabrication and surface modification of biomedical devices.