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자연과학대학
물리학전공
Journal papers
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Graphene nano-electromechanical mass sensor with high resolution at room temperature
Title
Graphene nano-electromechanical mass sensor with high resolution at room temperature
Authors
Shin D.H.
;
Kim H.
;
Kim S.H.
;
Cheong H.
;
Steeneken P.G.
;
Joo C.
;
Lee S.W.
Ewha Authors
이상욱
;
주철민
SCOPUS Author ID
이상욱
; 주철민
Issue Date
2023
Journal Title
iScience
ISSN
2589-0042
Citation
iScience vol. 26, no. 2
Keywords
Materials class
;
Nanomaterials
;
Sensor
Publisher
Elsevier Inc.
Indexed
SCIE; SCOPUS
Document Type
Article
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. © 2023 The Author(s)
DOI
10.1016/j.isci.2023.105958
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