Mapping the elastic properties of two-dimensional MoS2 via bimodal atomic force microscopy and finite element simulation

Li, Yuhao; Yu, Chuanbin; Gan, Yingye; Jiang, Peng; Yu, Jinjiang; Ou, Yun; Zou, Daifeng; Huang, Cheng; Wang, Jiahong; Jia, Tingting; Luo, Qian; Yu, Xue‐Feng; Zhao, Huijuan; Gao, Cun‐Fa; Li, Jiangyu

doi:10.1038/s41524-018-0105-8

Cited by 78 publications

(45 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the figure we specified the testing method and the sample fabrication method. The value determined with the buckling metrology method is in good agreement with the bulk value of MoS 2 , measured by neutron dispersion and X‐ray diffraction measurements, and it is compatible within experimental uncertainties with most of recent works that studied ultrathin flakes through nanoindentation, the analysis of the dynamics of nanomechanical resonators, the microscopic version of the blister test and bimodal atomic force microscopy . The only noticeable disagreement is with the values reported in ref ,.…”

Section: Summary Of Values For the Young's Modulus (And Their Uncertasupporting

confidence: 85%

“…NOTE : During the elaboration of this manuscript we became aware of a recent publication where another technique to measure the mechanical properties of supported (not freely suspended) 2D materials was developed . The mechanical properties of single‐ and bilayer MoS 2 supported onto a SiO 2 /Si surface were measured with a bimodal AFM.…”

Section: Summary Of Values For the Young's Modulus (And Their Uncertamentioning

confidence: 99%

See 1 more Smart Citation

Revisiting the Buckling Metrology Method to Determine the Young's Modulus of 2D Materials

et al. 2019

View full text Add to dashboard Cite

Nanoindentation, [2,[6][7][8] the analysis of the dynamics of nanomechanical resonators, [9] and the microscopic adaptation of tensile tests setups [10] or Brillouin scattering [11] have been developed to characterize the fundamental mechanical properties of 2D materials such as their Young's modulus. [12,13] Although powerful, these techniques require dedicated setups and rather complex data acquisition and/or analysis. Alternative to these methods, Stafford et al. [14] introduced the buckling metrology method, a simple and elegant way to measure the Young's modulus of thin polymeric films by studying the buckling instability, which arises when the film is deposited onto a compliant substrate, and it is subjected to uniaxial compression. [15] Under these conditions, the trade-off between the adhesion forces between film and substrate and the bending rigidity of the film leads to a rippling of the thin film with a characteristic wavelength that only depends on the elastic properties of the film and the substrate. This elegant method to characterize the mechanical properties of thin films has been extensively used to study coatings [14] and organic semiconducting materials. [16] However, it has been scarcely employed to study 2D materials, [17][18][19][20] and it seems that is has been mostly overlooked by the 2D materials community.Here, we apply the buckling-based metrology method to determine the Young's modulus of transition metal dichalcogenide (TMDC) flakes with thickness ranging from 2 layers up to 10 layers. We use optical microscopy to determine both the number of layers and the rippling wavelength, which is therefore very fast and simple to implement. We critically compare the results obtained with this method and demonstrate that despite its simplicity it provides results in good agreement with other techniques to study the mechanical properties of 2D materials. We believe that the buckling-based metrology method provides a fast route to determine the Young's modulus of 2D materials, being an excellent alternative to other existing nanomechanical test methods that are more technically demanding.The samples are fabricated by mechanical exfoliation of bulk layered TMDC crystals with adhesive tape (see Experimental Section for details). The exfoliated material is then transferred onto a compliant elastomeric substrate (Gel-Film, a commercially available polydimethylsiloxane, PDMS, film manufactured by Gel-Pak) which is subjected to a uniaxial stress of ≈20%. Right after the transfer, the stress on the elastomeric Measuring the mechanical properties of 2D materials is a formidable task. While regular electrical and optical probing techniques are suitable even for atomically thin materials, conventional mechanical tests cannot be directly applied. Therefore, new mechanical testing techniques need to be developed. Up to now, the most widespread approaches require micro-fabrication to create freely suspended membranes, rendering their implementation complex and costly. Here, a simple yet powerful technique is ...

show abstract

Section: Summary Of Values For the Young's Modulus (And Their Uncertasupporting

confidence: 85%

Section: Summary Of Values For the Young's Modulus (And Their Uncertamentioning

confidence: 99%

Revisiting the Buckling Metrology Method to Determine the Young's Modulus of 2D Materials

et al. 2019

View full text Add to dashboard Cite

show abstract

“…1,6,8,[16][17][18][19][20][21] Bimodal AFM provides a very fast, high resolution and accurate method to map the elastic properties of polymers and biomolecules. 22,23 It has been applied to determine with very high spatial resolution the elastic modulus of a large variety of materials and macromolecules such as antibodies 24 and other proteins, [25][26][27] DNA, 28,29 cells, 30,31 bone microconstituents, 32 lipid bilayers, 33,34 self-assembled monolayers, 35,36 2D materials 37 or organic semiconductor devices. 38 This technique can be operated in air or liquid.…”

Section: Introductionmentioning

confidence: 99%

Fast, quantitative and high resolution mapping of viscoelastic properties with bimodal AFM

2019

View full text Add to dashboard Cite

show abstract

“…The mechanical properties and the surface roughness of the pristine Al and the Cu–Al@Al was analyzed by the amplitude modulation–frequency modulation (AMFM) mode of atomic force microscopy (AFM) . The pristine Al foil was prepared via the cold rolling method, which would unavoidably produce mechanical inhomogeneity and exhibit a rough surface (Ra = 0.05 µm) and a heterogeneous Young's modulus distribution ( Figure a,b), which will be difficult to form uniform alloy layer with lithium ions.…”

Section: Methodsmentioning

confidence: 99%

Uniform Distribution of Alloying/Dealloying Stress for High Structural Stability of an Al Anode in High‐Areal‐Density Lithium‐Ion Batteries

et al. 2019

Self Cite

View full text Add to dashboard Cite

relative low theoretical capacity of graphite anode (372 mAh g −1 ) hinders the development of LIBs with higher energy density. [2] Therefore, exploiting anode materials with high capacity are drawing increasing attention. [3] Alloying anode materials, such as Si, Sn, and Al, show great potential due to their high theoretical capacity (4200 mAh g −1 as Li 4.4 Si for Si, [4] 990 mAh g −1 as Li 4.4 Sn for Sn, [5] and 2235 mAh g −1 as Li 2.25 Al for Al [6] ). Particularly, Al is a promising candidate anode due to its excellent conductivity, high theoretical capacity, low discharge potential, natural abundance, and especially low cost. [7] However, Al-based anodes are usually investigated in half cells or full cells with low cathode areal density (<2 mg cm −2 ), which are far from practical requirements. [8] For example, Al-based anodes, such as thin film, [9] nanowires, [10] yolk-shell nanoparticles, [6b] Al-Si-graphite composite, [11] and Al/C hybrid nanoclusters, [12] were paired with Li metal to assemble half cells. Even though core-shell Al@C nanospheres, [13] Al foil, [14] carbon coated porous Al foil, [6a] and bubble sheet-like interfacial layer protected Al foil [15] were reported as anode in full cells with excellent cycling stability, the reported areal density of cathodes were very low (1-2 mg cm −2 ). In practical application, it is still a challenge to maintain the structural stability of Al-based anodes when they are paired with high areal density of cathode materials (>5 mg cm −2 ) in a full cell. [16] But, the cathode with high areal density means high areal capacity, and which results in severe volume expansion and pulverization of Al anode. The decay of anode would destroy the integrity, and accelerate the failure of the full battery. [17] Recently, we found that the cracking and pulverization of the Al battery could be attributed to the uneven charge/discharge reaction along the boundaries of pristine Al ( Figure S1a,b, Supporting Information), which lead to the stress concentration and ultimate failure of Al anode ( Figure S1c, Supporting Information). Therefore, it is possible to extend the lifetime of Al anode via uniform distribution of the alloying/dealloying stress. Herein, we report an inactive (Cu)/active (Al) nanocomposite design to achieve homogeneous reaction of Al anode. When the as-prepared Cu-Al-modified Al (namely Cu-Al@Al) anode Aluminum (Al) is one of the most attractive anode materials for lithium-ion batteries (LIBs) due to its high theoretical specific capacity, excellent conductivity, abundance, and especially low cost. However, the large volume expansion, originating from the uneven alloying/dealloying reactions in the charge/ discharge process, causes structural stress and electrode pulverization, which has long hindered its practical application, especially when assembled with a high-areal-density cathode. Here, an inactive (Cu) and active (Al) codeposition strategy is reported to homogeneously distribute the alloying sites and disperse the stress of volume expans...

show abstract

Mapping the elastic properties of two-dimensional MoS2 via bimodal atomic force microscopy and finite element simulation

Cited by 78 publications

References 45 publications

Revisiting the Buckling Metrology Method to Determine the Young's Modulus of 2D Materials

Revisiting the Buckling Metrology Method to Determine the Young's Modulus of 2D Materials

Fast, quantitative and high resolution mapping of viscoelastic properties with bimodal AFM

Uniform Distribution of Alloying/Dealloying Stress for High Structural Stability of an Al Anode in High‐Areal‐Density Lithium‐Ion Batteries

Contact Info

Product

Resources

About