Gas-sorption properties and structures of carbonaceous films prepared by radio-frequency sputtering of Japanese calligraphy solidink disc

[Display omitted] •Carbonaceous sensing layers were prepared by radio-frequency sputtering of Japanese calligraphy solidink disc.•Collagen-sputtered films had a densely packed columnar structure with a high affinity for polar species.•Linear solvation energy relationships modeled the multiple regres...

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Veröffentlicht in:Sensors and actuators. B, Chemical Chemical, 2018-10, Vol.270, p.97-103
Hauptverfasser: Sugimoto, Iwao, Suda, Yoriko, Miyahara, Toshiyuki, Takahashi, Kazuhiko
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Sprache:eng
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Zusammenfassung:[Display omitted] •Carbonaceous sensing layers were prepared by radio-frequency sputtering of Japanese calligraphy solidink disc.•Collagen-sputtered films had a densely packed columnar structure with a high affinity for polar species.•Linear solvation energy relationships modeled the multiple regression equation for organic gas sorption capacities. Japanese calligraphy solidink (sumi) is essentially made of dried gelatinous carbon and collagen peptides composed of enzyme-catalyzed gelatin. Humin-like carbonaceous films with packed columnar structures were prepared by the radio-frequency (rf) sputtering of these gelatin-based polypeptides. The collagen film has a slightly-cleft structure, whereas the sumi film has remarkably developed clefts. The sumi film has a lower elemental ratio of nitrogen than the collagen film. The well-cleft and nitrogen-poor characteristics of the sumi film are considered to be due to the oxidative species generated by the rf discharge of water vaporized from the sumi disc sputtering target. Collagen films have high absorption capacities for small polar species such as water, methanol, and ethanol. This selectivity is attributable to the densely packed columnar structure with electronegative atoms such as nitrogen and oxygen inducing high affinity for polar species. Linear solvation energy relationships were used to model the absorption behaviors of these carbonaceous films by means of the polar and dielectric characteristics of absorbate molecules. These physicochemical molecular descriptors are distinguishing attributes for the gas-sorption of carbonaceous sputtered films of gelatin-based polypeptides.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2018.04.153