Electromagnetic interference shielding with 2D transition metal carbides (MXenes)

American Association for the Advancement of Science (AAAS) - Tập 353 Số 6304 - Trang 1137-1140 - 2016
Faisal Shahzad1,2, Mohamed Alhabeb3, Christine B. Hatter3, Babak Anasori3, Soon Man Hong1, Chong Min Koo1,2, Yury Gogotsi3
1Materials Architecturing Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of Korea
2Nanomaterials Science and Engineering, University of Science and Technology, 217, Gajung-ro, Yuseong-gu, Daejeon, 34113, Republic of Korea
3Department of Materials Science and Engineering and A. J. Drexel Nanomaterials Institute, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA

Tóm tắt

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 Ti 3 C 2 T x 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 Ti 3 C 2 T x films (4600 Siemens per centimeter) and multiple internal reflections from Ti 3 C 2 T x 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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Thông tin xuất bản

American Association for the Advancement of Science (AAAS)

Tập 353 Số 6304

1137-1140

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