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Published August 22, 2017 | Supplemental Material
Journal Article Open

Nanomechanical Encoding Method Using Enhanced Thermal Concentration on a Metallic Nanobridge

Abstract

We present a fast, energy-efficient nano-thermomechanical encoding scheme for digital information storage and retrieval. Digital encoding processes are conducted by the bistable electrothermal actuation of a scalable nanobridge device. The electrothermal energy is highly concentrated by enhanced electron/phonon scattering and heat insulation in a sub-100 nm metallic layer. The efficient conversion of electrothermal energy into mechanical strain allows digital switching and programming processes within 60 ns at 0.75 V with a programming energy of only 54 pJ. Furthermore, this encoding scheme together with the thermally robust design enables data retention at temperatures up to 400 °C. These results suggest that the proposed nano-thermomechanical encoding method could contribute to low-power electronics and robust information storage/retrieval systems.

Additional Information

© 2017 American Chemical Society. Received: March 1, 2017; Accepted: July 14, 2017; Published: July 14, 2017. This work was supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as "Global Frontier Project" under Grant CISS-2012054187 and by the National Research Foundation of Korea (NRF) under the Ministry of Education (NRF-2013R1A6A3A03026384). We acknowledge the helpful discussions we had with Hyungsoon Choi and Heung-Sun Sim and the support from Hyuck Choo. Author Contributions: J.O.L. conceived the idea and planned the experiments. M.-H.K. fabricated the device. J.O.L. and K.-W.C. performed the measurements and the model analysis. J.O.L., S.-J.C., and M.-H.S. participated in TEM measurements. J.O.L., S.-J.C., and I.-D.K. performed the TEM analysis. J.-B.Y. inspired the research with guidance and participated in data analysis with K.Y. The manuscript was written by J.O.L. with comments and assistance from I.-D.K., K.Y., and J.-B.Y. All authors discussed the results and commented on the manuscript. The authors declare no competing financial interest.

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