Journal
ACS NANO
Volume 7, Issue 7, Pages 6403-6409Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn4026788
Keywords
GaN nanobelts; piezotronics; strain-gated transistor; logic nanodevices; logic computation
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Funding
- NSF
- MURI Airforce
- BES DOE [DE-FG02-07ER46394]
- Chinese Academy of Science [KJCX2-YW-M13]
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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.
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