Self-Rolling of Monolayer Graphene for Ultrasensitive Molecular Sensing

Ma, Zhe; Tian, Ziao; Li, Xing; You, Chunyu; Wang, Yalan; Mei, Yongfeng; Di, Zengfeng

doi:10.1021/acsami.1c12592

Cited by 9 publications

(5 citation statements)

References 46 publications

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“…The size of graphene wrinkles ranges from the micrometer to the nanometer scale. Although micrometer-sized wrinkles have been studied using conventional Raman spectroscopy, − nanometer-sized wrinkles are well-below the diffraction limit and cannot be resolved by diffraction-limited Raman microscopes whose spatial resolution is a few hundreds of nanometers at best. In order to observe and analyze these minute features of graphene, a super-resolution technique called tip-enhanced Raman spectroscopy (TERS) is essential.…”

Section: Introductionmentioning

confidence: 99%

Probing Strain and Doping along a Graphene Wrinkle Using Tip-Enhanced Raman Spectroscopy

et al. 2023

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Wrinkles are unavoidable byproducts of graphene growth during chemical vapor deposition. They form because of the different thermal expansion coefficients of graphene and the underlying substrate. Micrometer-sized wrinkles are known to affect the electronic properties of graphene due to their shape and the strain variations they create. However, as graphene finds more applications in nanoscale devices, it is necessary to investigate the physical and electronic nature of wrinkles of nanometer dimensions. Here, we analyze the strain distribution and doping of a graphene wrinkle having 1.9 nm width using tip-enhanced Raman spectroscopy (TERS) in ambient conditions. We imaged the wrinkle through TERS mapping of the graphene Raman peaks and found that anisotropic strain and varying p-doping occur along the length of the wrinkle. Furthermore, we mapped the electronic Raman scattering (eRS) from the Au(111) that manifests as a broad background continuum in the Raman spectra. We found a strong correlation between the TERS images of the graphene wrinkle and the eRS of the Au(111) substrate. Our work demonstrates that the as-fabricated physical and electronic properties of nanometer-sized features, such as wrinkles, can be probed and studied in detail with TERS which is essential for nanodevice characterization.

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Section: Introductionmentioning

confidence: 99%

Probing Strain and Doping along a Graphene Wrinkle Using Tip-Enhanced Raman Spectroscopy

et al. 2023

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“…The self-rolling of monolayer graphene not only results in a larger surface area compared to monolayer graphene but also allows for further enhancement by increasing the number of turns in the rolled structure. Ma et al 43 demonstrated the fabrication of 3D tubular structures by depositing strain layers, providing the necessary driving force and support for rolling up monolayer graphene into graphene microtubes (Fig. 2(c)).…”

Section: Strategies For Improving the Electrical And Mechanical Prope...mentioning

confidence: 99%

Laser-induced graphene: synthesis advances, structural tailoring, enhanced properties, and sensing applications

Movaghgharnezhad,

Kang

2024

J. Mater. Chem. C

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“…Therefore, the bending stiffness of single-layered graphene is very close to the lipid bilayers in cells with extremely low bending rigidity (≈1-2 N m −2 ) of the out-of-plane deforma-tion, which is too "soft" to control its morphology and construct stable 3D structures without a supporting substrate in real applications. [22][23][24][25] On the other hand, it is easily susceptible to the destruction of in-plane deformation because the peak tensile strain of the free-standing single-crystalline monolayer graphene is just 5.8% before fracture, with a minimal fracture strength of less than 150 μN and an extremely low tensile stiffness of only ≈350 N m −1 in practical tensile tests. [21] These parameters lead to a poor resistance of the graphene film during tension and bending.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired Large‐Area Atomically‐Thin Graphene Membranes

Zhang,

Jia,

Zhang

et al. 2023

Adv Funct Materials

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Nanoporous graphene membranes are attractive for molecular separations, but it remains challenging to maintain sufficient mechanical strength during scalable fabrication and module development. Inspired by the composite structure of cell membranes and cell walls, a large‐area atomically thin nanoporous graphene membrane supported by a fiber‐reinforced structure with strong interlamellar adhesion is designed. Compared with other graphene‐based membranes of large scale, the fracture stress, fracture strength, and tensile stiffness of the composite membranes can be enhanced by a factor of 17, 67, and 94, respectively. This fiber‐reinforced structure also confers stability of the composite membrane to different curvature states and repeated bending processes after 10 000 times, which provides an opportunity for modularization. The breathable function of such membrane with an ultrahigh gas permeance (≈8.6–23 L m−2 d−1 Pa−1) and an ultralow water vapor transportation rate (WVTR) (≈23–129 g L m−2 d−1) is observed, superior to most commercial materials. This work provides a facile method to fabricate large‐area graphene membranes and paves the road to practical application in the membrane separation field for other 2D films.

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Self-Rolling of Monolayer Graphene for Ultrasensitive Molecular Sensing

Cited by 9 publications

References 46 publications

Probing Strain and Doping along a Graphene Wrinkle Using Tip-Enhanced Raman Spectroscopy

Probing Strain and Doping along a Graphene Wrinkle Using Tip-Enhanced Raman Spectroscopy

Laser-induced graphene: synthesis advances, structural tailoring, enhanced properties, and sensing applications

Bioinspired Large‐Area Atomically‐Thin Graphene Membranes

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