title: GaN nanobelt-based strain-gated piezotronic logic devices and computation.
abstract: Using the piezoelectric polarization charges created at the metal-GaN nanobelt (NB) interface under strain to modulate transport of local charge carriers across the Schottky barrier, the piezotronic effect is utilized to convert mechanical stimuli applied on the wurtzite-structured GaN NB into electronic controlling signals, based on which the GaN NB strain-gated transistors (SGTs) have been fabricated. By further assembling and integrating GaN NB SGTs, universal logic devices such as NOT, AND, OR, NAND, NOR, and XOR gates have been demonstrated for performing mechanical-electrical coupled piezotronic logic operations. Moreover, basic piezotronic computation such as one-bit binary addition over the input mechanical strains with corresponding computation results in an electrical domain by half-adder has been implemented. The strain-gated piezotronic logic devices may find applications in human-machine interfacing, active flexible/stretchable electronics, MEMS, biomedical diagnosis/therapy, and prosthetics.
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, USA.
authors.forename: Ruomeng
authors.initials: R
authors.lastname: Yu
authors.forename: Wenzhuo
authors.initials: W
authors.lastname: Wu
authors.forename: Yong
authors.initials: Y
authors.lastname: Ding
authors.forename: Zhong Lin
authors.initials: ZL
authors.lastname: Wang
mesh_terms: D003205:Computing Methodologies; D055119:Elastic Modulus; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005708:Gallium / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D036103:Nanotechnology / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013314:Stress, Mechanical; D013718:Tensile Strength; D014173:Transistors, Electronic
chemical_list: C473348:gallium nitride; D005708:Gallium