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Electrospun thermotropic anisotropic conductive Janus nanoribbons array membrane endowed with fluorescence and
Xiaona Liu1, Xuehua Tang1, Yaolin Hu1
1Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Abstract:
Applications of anisotropic conductive membranes (ACMs) in multi-scenarios are limited. In order to broaden the application scopes of ACMs, thermotropic anisotropic conductive Janus nanoribbons array membrane (TACJAM) is devised and manufactured, and a new concept of TACJAM is firstly proposed. Vanadium dioxide (VO2) with semiconductor-to-metal phase-change to generate pyroconductivity and magnetism is first used to construct TACJAM. [Dy(acac)3bipy/polymethyl methacrylate (PMMA)]//[VO2/PMMA] Janus nanoribbon is designed as the microscopic construction unit to fabricate TACJAM via directionally arranging Janus nanoribbons by a di-axial parallel electrospinning. The conductivity of TACJAM along lengthwise orientation (conductive) of Janus nanoribbons is enhanced upon heating. By inserting insulating luminescent unit [Dy(acac)3bipy/PMMA nanoribbon] in widthwise orientation (insulative) of Janus nanoribbon, insulative capability of TACJAM in insulation orientation is improved, thereby the macroscopic anisotropic conductivity of TACJAM is significantly improved. Janus nanoribbon endows TACJAM with high pyroconductivity anisotropy, excellent luminescence and magnetism. The conductivity, conductive anisotropy, magnetism and luminescence of TACJAM are simultaneously modulated by adjusting VO2 contents and heating temperature. TACJAM exhibits extremely strong pyroconductivity anisotropy at 80 °C, and conductivity anisotropy degree reaches 3.19 × 104. The magnetism of TACJAM at 80 °C is also about 6 times higher than that at room temperature. By feat of these temperature-dependent performances, potential applications of TACJAM in microcircuit interconnection and multi-mode anti-counterfeiting are demonstrated. This study realizes the multi-scenario practical applications of ACMs and provides new strategies for the future development of advanced ACMs.
