Anomalous Thermal Response of Graphene Kirigami Induced by Tailored Shape to Uniaxial Tensile Strain: A Molecular Dynamics Study

Li, Hui; Cheng, Guoan; Liu, Yongjian; Zhong, Dan

doi:10.3390/nano10010126

Cited by 7 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, a vast range of thermal conductivity can be found by tuning the geometrical parameters of the origami graphene [22]. For the large deformation system, the factor of cross-section area can lead to a four-times difference in thermal conductivity [23]. Kirigami can also make graphene highly anisotropic in terms of thermal and electrical transport [24], and the thermal conductivity of kirigami graphene nanoribbons is even expected to reach zero in extreme cases [25].…”

Section: Introductionmentioning

confidence: 99%

Modulating the mass sensitivity of graphene resonators via kirigami

Zhu¹,

Zhang²,

Zhang³

et al. 2022

Nanotechnology

View full text Add to dashboard Cite

The unique mechanical properties of graphene make it an excellent candidate for resonators. We have used molecule dynamic to simulate the resonance process of graphene. The kirigami approach was introduced to improve the mass sensitivity of graphene sheets. Three geometric parameters governing the resonant frequency and mass sensitivity of Kirigami graphene NEMS were defined. The simulation results demonstrate that the closer the Kirigami defect is to the central position of the drum graphene, the higher the mass sensitivity of the graphene, showing up to about 2.2 times compared with that of pristine graphene. Simultaneously, the kirigami graphene has a higher out-of-plane amplitude and easy access to nonlinear vibrations, leading to higher mass sensitivity. Besides, the kirigami structure can restrict the diffusion of gold atoms on graphene under high initial velocity or large tension condition. It is evident that a reasonable defect design can improve the sensitivity and stability of graphene for adsorption mass.

show abstract

Section: Introductionmentioning

confidence: 99%

Modulating the mass sensitivity of graphene resonators via kirigami

Zhu¹,

Zhang²,

Zhang³

et al. 2022

Nanotechnology

View full text Add to dashboard Cite

show abstract

“…Metamaterials comprised of lattice members are spatial periodic structures with unprecedented physical properties, mainly derived from the architecture of the repeated substructure, rather than the nature of the constituent materials. It is worth noting that extraordinary strength-to-weight and stiffness-to-weight ratios, frequency bandgaps, negative overall elastic moduli, negative mass density, auxeticity and solitary wave propagation represent characteristic and unconventional properties of such systems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18], as well as a multistable mechanical response [19][20][21][22][23][24][25][26][27][28]. However, the additive manufacturing of multi-cell realizations of mechanical metamaterials remains a challenge at present, due to the difficulty of reproducing the desired behaviors at small scales [8,9,[29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Design and Testing of Bistable Lattices with Tensegrity Architecture and Nanoscale Features Fabricated by Multiphoton Lithography

2020

View full text Add to dashboard Cite

A bistable response is an innate feature of tensegrity metamaterials, which is a conundrum to attain in other metamaterials, since it ushers unconventional static and dynamical mechanical behaviors. This paper investigates the design, modeling, fabrication and testing of bistable lattices with tensegrity architecture and nanoscale features. First, a method to design bistable lattices tessellating tensegrity units is formulated. The additive manufacturing of these structures is performed through multiphoton lithography, which enables the fabrication of microscale structures with nanoscale features and extremely high resolution. Different modular lattices, comprised of struts with 250 nm minimum radius, are tested under loading-unloading uniaxial compression nanoindentation tests. The compression tests confirmed the activation of the designed bistable twisting mechanism in the examined lattices, combined with a moderate viscoelastic response. The force-displacement plots of the 3D assemblies of bistable tensegrity prisms reveal a softening behavior during the loading from the primary stable configuration and a subsequent snapping event that drives the structure into a secondary stable configuration. The twisting mechanism that characterizes such a transition is preserved after unloading and during repeated loading-unloading cycles. The results of the present study elucidate that fabrication of multistable tensegrity lattices is highly feasible via multiphoton lithography and promulgates the fabrication of multi-cell tensegrity metamaterials with unprecedented static and dynamic responses.

show abstract

“…Atomistic MD simulations have extensively investigated GK’s stretchability, fracture resistance, and permeability. − ,,,− Notably, these studies unveiled a noteworthy trend: GK can enhance the fracture strains of graphene by approximately 3-fold compared to standard monolayer graphene. Consequently, the realm of kirigami-inspired nanostructures presents exciting prospects for the fabrication of highly flexible and stretchable devices using graphene and other diverse 2D materials. − …”

mentioning

confidence: 99%

Elastocaloric Effect in Graphene Kirigami

2023

View full text Add to dashboard Cite

Kirigami, a traditional Japanese art of paper cutting, has recently been explored for its elastocaloric effect (ECE) in kirigami-based materials (KMs), where an applied strain induces temperature changes. Importantly, the feasibility of a nanoscale graphene kirigami monolayer was experimentally demonstrated. Here, we investigate the ECE in GK representing the thinnest possible KM to better understand this phenomenon. Through molecular dynamics simulations, we analyze the temperature change and coefficient of performance (COP) of GK. Our findings reveal that while GKs lack the intricate temperature changes observed in macroscopic KMs, they exhibit a substantial temperature change of approximately 9.32 K (23 times higher than that of macroscopic KMs, which is about 0.4 K) for heating and −3.50 K for cooling. Furthermore, they demonstrate reasonable COP values of approximately 1.57 and 0.62, respectively. It is noteworthy that the one-atom-thick graphene configuration prevents the occurrence of the complex temperature distribution observed in macroscopic KMs.

show abstract

Anomalous Thermal Response of Graphene Kirigami Induced by Tailored Shape to Uniaxial Tensile Strain: A Molecular Dynamics Study

Cited by 7 publications

References 40 publications

Modulating the mass sensitivity of graphene resonators via kirigami

Modulating the mass sensitivity of graphene resonators via kirigami

Design and Testing of Bistable Lattices with Tensegrity Architecture and Nanoscale Features Fabricated by Multiphoton Lithography

Elastocaloric Effect in Graphene Kirigami

Contact Info

Product

Resources

About