期刊
SCIENCE
卷 353, 期 6304, 页码 1137-1140出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aag2421
关键词
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资金
- U.S. National Science Foundation [DMR-1310245]
- Libyan Ministry of Higher Education and Scientific Research
- Fundamental R&D Program for Core Technology of Materials
- Industrial Strategic Technology Development Program - Ministry of Trade, Industry and Energy
- Disaster and Safety Management Institute by the Ministry of Public Safety and Security of Korean Government, Republic of Korea
- Korea Institute of Science and Technology
- Korea Evaluation Institute of Industrial Technology (KEIT) [10050858] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Ministry of Science, ICT & Future Planning, Republic of Korea [2E26120] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Disaster Management Research Institute (NDMI), Republic of Korea [2016-MPSS14-003-01010000-2016] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1310245] Funding Source: National Science Foundation
Materials with good flexibility and high conductivity that can provide electromagnetic interference (EMI) shielding with minimal thickness are highly desirable, especially if they can be easily processed into films. Two-dimensional metal carbides and nitrides, known as MXenes, combine metallic conductivity and hydrophilic surfaces. Here, we demonstrate the potential of several MXenes and their polymer composites for EMI shielding. A 45-micrometer-thick Ti3C2Tx film exhibited EMI shielding effectiveness of 92 decibels (>50 decibels for a 2.5-micrometer film), which is the highest among synthetic materials of comparable thickness produced to date. This performance originates from the excellent electrical conductivity of Ti3C2Tx films (4600 Siemens per centimeter) and multiple internal reflections from Ti3C2Tx flakes in free-standing films. The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.
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