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[资源] nature nanotechnology最新碳纳米管用于平板显示器及光伏器件

Carbon nanotube reinforced polymeric composites can have favourable electrical properties, which make them useful for
applications such as flat-panel displays and photovoltaic devices. However, using aqueous dispersions to fabricate
composites with specific physical properties requires that the processing of the nanotube dispersion be understood and
controlled while in the liquid phase. Here, using a combination of experiment and theory, we study the electrical
percolation of carbon nanotubes introduced into a polymer matrix, and show that the percolation threshold can be
substantially lowered by adding small quantities of a conductive polymer latex. Mixing colloidal particles of different sizes
and shapes (in this case, spherical latex particles and rod-like nanotubes) introduces competing length scales that can
strongly influence the formation of the system-spanning networks that are needed to produce electrically conductive
composites. Interplay between the different species in the dispersions leads to synergetic or antagonistic percolation,
depending on the ease of charge transport between the various conductive components.
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