4 years ago

Nanomechanical Encoding Method Using Enhanced Thermal Concentration on a Metallic Nanobridge

Nanomechanical Encoding Method Using Enhanced Thermal Concentration on a Metallic Nanobridge
Kwang-Wook Choi, Min-Ho Kang, Il-Doo Kim, Min-Ho Seo, Jun-Bo Yoon, Kyoungsik Yu, Seon-Jin Choi, Jeong Oen Lee
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.

Publisher URL: http://dx.doi.org/10.1021/acsnano.7b01475

DOI: 10.1021/acsnano.7b01475

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