首页|Enhanced reduction of graphene oxide via laser-dispersion coupling:Towards large-scale,low-defect graphene for crease-free heat-dissipating membranes in advanced flexible electronics

Enhanced reduction of graphene oxide via laser-dispersion coupling:Towards large-scale,low-defect graphene for crease-free heat-dissipating membranes in advanced flexible electronics

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The advancement of flexible electronics demands improved components,necessitating heat dissipation membranes(HDMs)to exhibit high thermal conductivity while maintaining structural integrity and per-formance stability even after extensive deformation.Herein,we have devised a laser-modulated reduc-tion technique for graphene oxide(GO),enabling the fabrication of high-quality,large-scale,low-defect graphene,which yields high-performance HDMs after orderly deposition.The work underscores the crucial role of the laser wavelength and dispersion liquid's coupling intensity in influencing the mor-phology and properties of graphene.Optimal coupling effect and energy conversion are realized when a laser of 1064 nm wavelength irradiates a triethylene glycol(TEG)/N,N-Dimethylformamide(DMF)disper-sion.This unique synergy generates high transient energy,which facilitates the deprotonation process and ensures a swift,comprehensive GO reduction.In contrast to conventional water-based laser reduc-tion methods,the accelerated reaction magnifies the size of the graphene sheets by mitigating the abla-tion effect.After membrane construction with an ordered structure,the corresponding membrane exhibits a high thermal conductivity of 1632 W m-1 K-1,requiring only～1/10 of the total preparation time required by other reported methods.Remarkably,the resulting HDM demonstrates superior resili-ence against creasing and folding,maintaining excellent smoothness and negligible reduction in thermal conductivity after violent rubbing.The combination of exceptional flexibility and thermal conductivity in HDMs paves the way for long-term practical use in the flexible electronics industry.

Laser-irradiation technologySystem couplingGraphene-basedHeat dissipation membranesCrease-free

Jiawei Sun、Yuwei Xiong、Haiyang Jia、Longxiang Han、Wen Ye、Litao Sun

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College of Electronic and Information Engineering,Suzhou University of Science and Technology,Suzhou 215009,China

SEU-FEI Nano-Pico Center,Key Laboratory of MEMS of Ministry of Education,Southeast University,Nanjing 210096,China

Jiangsu Industrial Intelligent and Low-carbon Technology Engineering Center,Suzhou 215000,China

Suzhou Key Laboratory of Intelligent Low-carbon Technology Application,Suzhou 215000,China

School of Physics and New Energy,Xuzhou University of Technology,Xuzhou 221018,China

College of Chemistry and Life Sciences,Suzhou University of Science and Technology,Suzhou 215009,China

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National Science Foundation of Jiangsu ProvinceNational Natural Science Foundation of Chinaopen research fund of Key Laboratory of MEMS of Ministry of Education,Southeast University

BK2021086162101374

2024

10.1016/j.scib.2024.03.020

科学通报(英文版)
中国科学院

科学通报(英文版)

CSTPCD
ISSN：1001-6538
年,卷(期)：2024.69(11)
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