Graphene nano-electromechanical mass sensor with high resolution at room temperature

Dong Hoon Shin, Hakseong Kim, Sung Hyun Kim, Hyeonsik Cheong, Peter G. Steeneken, Chirlmin Joo, Sang Wook Lee*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)
37 Downloads (Pure)

Abstract

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.

Original languageEnglish
Article number105958
Number of pages13
JournaliScience
Volume26
Issue number2
DOIs
Publication statusPublished - 2023

Keywords

  • Materials class
  • Nanomaterials
  • Sensor

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