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- W3034331481 abstract "We report a simple process to connect graphene sheets forming graphene hollow microtubes (GHMs), where the tube diameter can be adjusted in the 100–500 nm range by changing reaction conditions. We discovered that graphene sheets can be seamlessly linked to each other if C atoms are substituted for N atoms at the edges of the sheets during annealing of graphene oxide(G-O)-coated electrospun PAN carbon fibers in ammonia atmosphere. The G-O/carbon hybrid nanofibers framework served as a confining template around which graphene sheets curved to form tubular structures. The GHMs formed by this process are similar to (very) large diameter carbon nanotubes (CNTs) with relatively low curvature whose electron field-emission properties include a low turn-on voltage of 0.18 V/μm (at J = 10 μA/cm2), low threshold field of 0.35 V/μm (at J = 10 mA/cm2), and high field-emission stability. This process to produce GHMs can be scaled up to fabricate GHMs of variable diameter in bulk quantities." @default.
- W3034331481 created "2020-06-19" @default.
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- W3034331481 date "2020-10-01" @default.
- W3034331481 modified "2023-10-15" @default.
- W3034331481 title "Hollow “graphene” microtubes using polyacrylonitrile nanofiber template and potential applications of field emission" @default.
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- W3034331481 doi "https://doi.org/10.1016/j.carbon.2020.05.110" @default.
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