Graphene nano-electromechanical mass sensor with high resolution at room temperature
- 주제(키워드) Materials class , Nanomaterials , Sensor
- 등재 SCIE, SCOPUS
- 발행기관 Elsevier Inc.
- 발행년도 2023
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000203945
- 본문언어 영어
- Published As https://doi.org/10.1016/j.isci.2023.105958
초록/요약
The inherent properties of 2D materials—light mass, high out-of-plane flexibility, and large surface area—promise great potential for precise and accurate nanomechanical mass sensing, but their application is often hampered by surface contamination. Here we demonstrate a tri-layer graphene nanomechanical resonant mass sensor with sub-attogram resolution at room temperature, fabricated by a bottom-up process. We found that Joule-heating is effective in cleaning the graphene membrane surface, which results in a large improvement in the stability of the resonance frequency. We characterized the sensor by depositing Cr metal using a stencil mask and found a mass-resolution that is sufficient to weigh very small particles, like large proteins and protein complexes, with potential applications in the fields of nanobiology and medicine. © 2023 The Author(s)
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