Structure and physical properties of stable isotopic amorphous carbon films

Suzuki, Yutaro; Kurokawa, Yasuyoshi; Suzuki, Tsuneo; Kanda, Kazuhiro; Niibe, Masahito; Nakano, Masayuki; Ohtake, Naoto; Akasaka, Hiroki

doi:10.1016/j.diamond.2015.10.024

Cited by 2 publications

(2 citation statements)

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“…In this Figure, a pre‐edge resonance is seen at 285.3 eV, that is attributed to the transitions from C1s → π* originating from sp 2 (CC) sites. In addition, the broad band appearing in the range of 288–310 eV is attributed to the overlapping C1s → σ* transitions at the sp 3 , sp 2 , and sp 1 sites of the a‐CO x /G nanofilaments . By normalizing the area of the C1s → π* resonance with that of C1s → σ* (i.e., sp 2 /(sp 2 + sp 3 )), the amount of sp 2 bonded carbon atoms can be estimated.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the broad band appearing in the range of 288-310 eV is attributed to the overlapping C1s → σ* transitions at the sp 3 , sp 2 , and sp 1 sites of the a-CO x /G nanofilaments. [36][37][38][39] By normalizing the area of the C1s → π* resonance with that of C1s → σ* (i.e., sp 2 /(sp 2 + sp 3 )), the amount of sp 2 bonded carbon atoms can be estimated. The obtained sp 2 value can be compared with that calculated similarly for a reference material (HOPG in our study), to determine the relative sp 2 content.…”

Section: Wwwadvmatinterfacesdementioning

confidence: 99%

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A Flexible Oxygenated Carbographite Nanofilamentous Buckypaper as an Amphiphilic Membrane

Homaeigohar

Strunskus

Strobel

et al. 2018

Adv Materials Inter

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Here, for the first time, oxygenated amorphous carbon/graphite (a‐COx/G) hybrid nanofilaments are produced and used as the building blocks of a buckypaper membrane. The nanofilaments are in fact the innovatively chopped version of brittle, highly graphitized polyacrylonitrile precursor nanofibers. The high temperature (1250 °C) graphitization and then fast cooling bring about biphasic nanofibers made of graphite and amorphous carbon, readily reoxidized during cooling. The combination of polar and nonpolar domains in the nanofilaments governs a desirable amphiphilicity, thus selectivity to a variety of polar/nonpolar water pollutants. Through electrostatic and π–π interactions, the membrane efficiently discriminates amphiphilic castor oil as well as cationic methylene blue dye from water. Moreover, the buckypaper‐like structure of the membrane is 100% efficient in depth filtration of colloidal particles from water. The membrane's water flux is 16 times higher than that of commercial microfiltration membranes, promising an advanced energy/cost efficient filtration process. Thus, being multispectrally selective and highly water permeable, the a‐COx/G nanofilamentous membrane is regarded potentially a next‐generation, cost‐effective, and sustainable alternative to the long‐existing thin‐film composite membranes for water treatment.

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Section: Resultsmentioning

confidence: 99%