Reduced graphene oxide bubbles with tunable electromagnetic shielding effectiveness. (October 2020)

• Record Type: Journal Article
• Authors: Li, Xiangfen; Tao, Zechao; Hao, Baoyi; Kong, Qingqiang; Liu, Zhuo; Liu, Zhanjun; Guo, Quangui; Liu, Lang
• Is Part Of: Scripta materialia. Number 187(2020)
• Page Start: 407
• Page End: 412
• Publication Date: 2020-10
• Subjects: rGO bubbles -- Template method -- Tunable EMI shielding effectiveness -- Absorption mechanism; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2020.06.059
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Reduced graphene oxide (rGO) bubbles containing sphere-like pores inside are prepared using polystyrene (PS) micro-balls as template. rGO bubbles exhibit excellent electromagnetic interference (EMI) shielding effectiveness in frequency range of 8–12 GHz. The shielding can be attributed to absorption mechanism which is a synergistic effect of conductive rGO sheets and repeated reflection inside the sphere-like pores. Furthermore, EMI shielding effectiveness can be tuned by heat-treated temperature, pore size and ratio. The EMI shielding effectiveness of rGO bubbles can reach to 54 dB with 5 μm pores of 25 wt% content as well as thermally annealed at 800 °C. Graphical abstract: Image, graphical abstract