title: 3D hierarchical architectures based on self-rolled-up silicon nitride membranes.
abstract: This study presents the superior structural versatility of strained silicon nitride (SiNx) membranes as a platform for three-dimensional (3D) hierarchical tubular architectures. The effects of compressive and tensile stressed SiNx layer thickness on the self-rolled-up tube curvature, the sacrificial layer etching anisotropy on rolling direction and chirality, and stress engineering by localized thickness control or thermal treatment, are explored systematically. Using strained SiNx membranes as an electrically insulating and optically transparent mechanical support, compact 3D hierarchical architectures involving carbon nanotube arrays and passive electronic components are demonstrated by releasing the functional structures deposited and patterned in 2D. These examples highlight the uniqueness of this platform that exploits 2D processing and self-assembly to achieve highly functional 3D structures.
authors.affiliation: Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL 61822, USA.
authors.forename: Paul
authors.initials: P
authors.lastname: Froeter
authors.forename: Xin
authors.initials: X
authors.lastname: Yu
authors.forename: Wen
authors.initials: W
authors.lastname: Huang
authors.forename: Frank
authors.initials: F
authors.lastname: Du
authors.forename: Moyang
authors.initials: M
authors.lastname: Li
authors.forename: Iksu
authors.initials: I
authors.lastname: Chun
authors.forename: Seung Hyun
authors.initials: SH
authors.lastname: Kim
authors.forename: Kuen J
authors.initials: KJ
authors.lastname: Hsia
authors.forename: John A
authors.initials: JA
authors.lastname: Rogers
authors.forename: Xiuling
authors.initials: X
authors.lastname: Li