Imperial College London

DrNaNi

Faculty of EngineeringDepartment of Materials

Honorary Lecturer
 
 
 
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Contact

 

n.ni

 
 
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Location

 

LM04Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Ni:2015:10.1038/srep13712,
author = {Ni, N and Barg, S and Garcia-Tunon, E and Macul, Perez F and Miranda, M and Lu, C and Mattevi, C and Saiz, E},
doi = {10.1038/srep13712},
journal = {Scientific Reports},
title = {Understanding Mechanical Response of Elastomeric Graphene Networks},
url = {http://dx.doi.org/10.1038/srep13712},
volume = {5},
year = {2015}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Ultra-light porous networks based on nano-carbon materials (such as graphene or carbon nanotubes) have attracted increasing interest owing to their applications in wide fields from bioengineering to electrochemical devices. However, it is often difficult to translate the properties of nanomaterials to bulk three-dimensional networks with a control of their mechanical properties. In this work, we constructed elastomeric graphene porous networks with well-defined structures by freeze casting and thermal reduction, and investigated systematically the effect of key microstructural features. The porous networks made of large reduced graphene oxide flakes (>20 μm) are superelastic and exhibit high energy absorption, showing much enhanced mechanical properties than those with small flakes (<2 μm). A better restoration of the graphitic nature also has a considerable effect. In comparison, microstructural differences, such as the foam architecture or the cell size have smaller or negligible effect on the mechanical response. The recoverability and energy adsorption depend on density with the latter exhibiting a minimum due to the interplay between wall fracture and friction during deformation. These findings suggest that an improvement in the mechanical properties of porous graphene networks significantly depend on the engineering of the graphene flake that controls the property of the cell walls.
AU - Ni,N
AU - Barg,S
AU - Garcia-Tunon,E
AU - Macul,Perez F
AU - Miranda,M
AU - Lu,C
AU - Mattevi,C
AU - Saiz,E
DO - 10.1038/srep13712
PY - 2015///
SN - 2045-2322
TI - Understanding Mechanical Response of Elastomeric Graphene Networks
T2 - Scientific Reports
UR - http://dx.doi.org/10.1038/srep13712
UR - http://hdl.handle.net/10044/1/25106
VL - 5
ER -