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Related Concept Videos

MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

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A Flexible Carbon Nanotube Sen-Memory Device.

Ting-Yu Qu1, Yun Sun1, Mao-Lin Chen1,2

  • 1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China.

Advanced Materials (Deerfield Beach, Fla.)
|January 25, 2020
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Summary

A novel "sen-memory" device integrates sensing and memory functions in one unit for flexible electronics. This carbon nanotube-based device offers high performance and durability for low-power, strain-enduring applications.

Keywords:
carbon nanotubesflexible electronicsfloating-gate devicesoptical sensing and memory

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • Modern electronics rely on separate charge-coupled devices (sensing) and data storage devices (memory).
  • Existing flexible electronics struggle with combined sensing and memory, especially under strain and low power.
  • Conventional systems lack sensitivity and efficient data transformation from sensed information to memory.

Purpose of the Study:

  • To develop a monolithic integrated circuit with dual sensing and memory functionality for flexible electronics.
  • To address limitations of conventional sensing-and-memory systems in wearable, ultralow power, and strained environments.

Main Methods:

  • Fabrication of a novel 'sen-memory' device utilizing a carbon nanotube thin film active channel.
  • Integration of a controllably oxidized aluminum nanoparticle array as a floating gate for electrical and optical programming.
  • Characterization of device performance, including on-off current ratio, data retention, and flexibility under strain.

Main Results:

  • The sen-memory device demonstrates a high on-off current ratio of approximately 10^6.
  • Achieved long-term data retention of approximately 10^8 seconds and durable flexibility at 0.4% bending strain.
  • Successfully sensed a photogenerated pattern in seconds at zero bias and memorized an image for years.

Conclusions:

  • The demonstrated sen-memory device offers a transformative solution for cofunctional sensing and memory in a single unit.
  • The device's high performance, long retention, and flexibility are suitable for advanced flexible and wearable electronics.
  • This innovation paves the way for next-generation electronic systems requiring integrated sensing and data storage capabilities.