Letter Cite This: Nano Lett. XXXX, XXX, XXX−XXX
pubs.acs.org/NanoLett
Continuous, Ultra-lightweight, and Multipurpose Super-aligned Carbon Nanotube Tapes Viable over a Wide Range of Temperatures Xiang Jin,‡,† Hengxin Tan,‡,† Zipeng Wu,‡,† Jiecun Liang,⊥ Wentao Miao,‡ Chao-Sheng Lian,‡,∥ Jiangtao Wang,‡ Kai Liu,*,# Haoming Wei,‡ Chen Feng,‡ Peng Liu,‡ Yang Wei,‡ Qunqing Li,‡ Jiaping Wang,‡ Liang Liu,‡ Xide Li,*,⊥ Shoushan Fan,‡ Wenhui Duan,*,‡ and Kaili Jiang*,‡
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State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China ⊥ School of Aerospace Engineering, Tsinghua University, Beijing 100084, China ∥ International Laboratory for Quantum Functional Materials of Henan and School of Physics and Engineering, Zhengzhou University, Zhengzhou 450001, China # State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China S Supporting Information *
ABSTRACT: In extreme environments, such as at ultrahigh or ultralow temperatures, the amount of tape used should be minimal so as to reduce system contamination and unwanted residues. However, tapes made from conventional materials typically lose their adhesiveness or leave residues difficult to remove under such conditions. Thus, the development of more versatile, lightweight, and easily removable tapes for applications in such extreme environments has received considerable attention. Here, we report that horizontally superaligned carbon nanotube (SACNT) tapes can be used to provide perfect van der Waals (vdW) interface contacts over a wide range of temperatures (from −196 to 1000 °C), yielding outstanding adhesiveness with specific adhesion strengths up to ∼1.1 N/μg. With a surface density of only 0.5−5 μg/cm2, hundreds of times lighter than the vertically aligned CNT adhesives, the SACNT tapes can be cost-effectively provided in hundreds of meters. They have multipurpose adhesive abilities for versatile materials and are also easily separated from samples even after exposure to extreme temperature regimes. First-principles calculations confirm the mechanism of vdW adhesion and reveal that ultraflat and nanometer-thick SACNT tapes may yield far greater adhesive abilities. These SACNT tapes show great potential for use in mechanical bonding, electrical bonding, and thermal dissipation in electronic devices. KEYWORDS: dry adhesive, carbon nanotube tape, removable, multipurpose, high-temperature
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possess other useful features including self-cleaning attributes13 and unique electrical and thermal properties,11 and they have recently been proven effective at both high and low temperatures.23,27 The adhesiveness of VA-MWNTs is invariant under a wider range of temperatures, compared with those of conventional metal and ceramic pastes; however, VA-MWNT adhesives are relatively thick (usually tens to hundreds of microns) and of modest surface area (typically
