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NANOF研究文章|不对称石墨烯纳米网的热整流现象

27 2月 2023 gabriels

Graphene-based thermal rectification was investigated by measuring the thermal transport properties of asymmetric suspended graphene nanomesh devices. A sub-10 nm periodic nanopore phononic crystal structure was successfully patterned on the half area of the suspended graphene ribbon by helium ion beam milling technology. The ‘differential thermal leakage’ method was developed for thermal transport measurement without disturbance from the leakage of electron current through the suspended graphene bridge. A thermal rectification ratio of up to 60% was observed in a typical device with a nanopore pitch of 20 nm. By increasing the nanopore pitch in a particular range, the thermal rectification ratio showed an increment. However, this ratio was degraded by increasing the environmental temperature. This experiment suggests a promising way to develop a high-performance thermal rectifier by using a phononic crystal to introduce asymmetry on homogeneous material.

文章介绍

Thermal rectification on asymmetric suspended graphene nanomesh devices

Fayong Liu, Manoharan Muruganathan, Yu Feng, Shinichi Ogawa, Yukinori Morita, Chunmeng Liu, Jiayu Guo, Marek Schmidt and Hiroshi Mizuta

通讯作者：

Fayong Liu，日本北陆先端科学技术大学院大学
Hiroshi Mizuta，日本北陆先端科学技术大学院大学/日立剑桥实验室

期刊介绍

Nano Futures

2021年影响因子：4.070 Citescore：4
Nano Futures（NANOF，纳米展望）是一本具有高影响力的多学科、交叉学科期刊，捕捉开拓性研究和对纳米科学产生长远影响的未来导向性研究。这本期刊将为纳米领域的科研人员提供一个独特的新平台。在快速发表具有重大发现的研究工作的同时，首要任务是将具有高影响力的内容与高质量的作者服务相结合。NANOF目前已被Web of Science和Scopus录入，并获得了影响因子。