Síntese de fulerenos (C60 e C70) e nanotubos de carbono de parede simples por pirólise em plasma de hélio, e sua caracterização por espectroscopia IV, UV-Vis, DRX, adsorção de gases, espectroscopia Raman, MEV e MET

Romero, José Gino Venegas; Luengo, C.A.

doi:10.47749/t/unicamp.2002.224192

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“…The discovery of buckminsterfullerene (C 60 ) in 1985, more commonly known as fullerene, occurred accidentally in an attempt to simulate the conditions of nucleation of carbon atoms in cold red giant N-type stars 2 . Because of its structural stability, C 60 is considered to be the third carbon allotrope, after diamond and graphite 3 .…”

Section: Introductionmentioning

confidence: 99%

Polyfullerene Thin Films Applied as NH3 Sensors

et al. 2021

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Fullerene is considered to be the third carbon allotrope after diamond and graphite. The study of fullerene derivatives has been growing due to their exceptional electron affinity. This work proposes th study of three different fullerene derivatives, being phenyl-C 61 -butyric acid methyl ester (PCBM), oligo {(phenyl-C 61 -butyric acid methyl ester)-alt-[1,4-bis(bromomethyl)-2,5-bis(octyloxy)benzene]} (OPCBMMB) and poly {[bispyrrolidino(phenyl-C 61 -butyric acid methyl ester)]-alt-[2,5-bis(octyloxy) benzene]} (PPCBMB), and their application as NH 3 sensors. Experimental results showed that these materials have a reproducible response to NH 3 , with PCBM resulting in the highest observed current peak, followed by OPCBMMB and PPCBMB. These results imply that PCBM, OPCBMMB and PPCBMB can be used to produce NH 3 sensors.

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Section: Introductionmentioning

confidence: 99%