Large, Linear, and Tunable Positive Magnetoresistance of Mechanically Stable Graphene Foam–Toward High-Performance Magnetic Field Sensors
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- 作者：Rizwan Ur Rehman SagarMassimiliano Galluzzi ; Caihua Wan ; Khurram Shehzad ; Sachin T. Navale ; Tauseef Anwar ; Rajaram S. Mane ; Hong-Guang Piao ; Abid Ali ; Florian J. Stadler
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2017
- 出版时间：January 18, 2017
- 年：2017
- 卷：9
- 期：2
- 页码：1891-1898
- 全文大小：484K
- ISSN：1944-8252
文摘
Here, we present the first observation of magneto-transport properties of graphene foam (GF) composed of a few layers in a wide temperature range of 2–300 K. Large room-temperature linear positive magnetoresistance (PMR ≈ 171% at B ≈ 9 T) has been detected. The largest PMR (∼213%) has been achieved at 2 K under a magnetic field of 9 T, which can be tuned by the addition of poly(methyl methacrylate) to the porous structure of the foam. This remarkable magnetoresistance may be the result of quadratic magnetoresistance. The excellent magneto-transport properties of GF open a way toward three-dimensional graphene-based magnetoelectronic devices.