Structure of multiwalled carbon nanotubes grown by chemical vapor deposition

Байтингер, Е. М.; Vekesser, N. A.; Kovalev, I. N.; Синицын, Антон; Tsygankov, I. A.; Ryabkov, Yu. I.; Викторов, В. В.

doi:10.1134/s0020168511030058

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…All samples were characterized by Raman spectroscopy (LabRam HR 800; Horiba Jobin Yvon, Minami-Ku, Kyoto, Japan), XPS (K-α; ThermoScientific, Waltham, Massachusetts, USA; using Al Kα radiation, 1,486 eV), SEM (JSM-6701F; Jeol, Peabody, Massachusetts, USA), and TEM (JEM 2010F; JEM-ARM-200-F; Jeol, Peabody, Massachusetts, USA). Raman spectroscopy with 532 nm laser excitation wavelength was used to analyze structural changes of the CNT produced by the acid treatment (Baitinger et al, 2011) The presence of reactive groups and AMG was confirmed by XPS (Porro et al, 2007). Morphology and functionalization of CNTs were studied by means of SEM and TEM.…”

Section: Spectroscopy and Microscopy Characterizationmentioning

confidence: 99%

Characterization of Functionalized Multiwalled Carbon Nanotubes for Use in an Enzymatic Sensor

et al. 2014

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Carbon nanotubes (CNT) have proven to be materials with great potential for the construction of biosensors. Development of fast, simple, and low cost biosensors to follow reactions in bioprocesses, or to detect food contaminants such as toxins, chemical compounds, and microorganisms, is presently an important research topic. This report includes microscopy and spectroscopy to characterize raw and chemically modified multiwall carbon nanotubes (MWCNTs) synthesized by chemical vapor deposition with the intention of using them as the active transducer in bioprocessing sensors. MWCNT were simultaneously purified and functionalized by an acid mixture involving HNO3-H2SO4 and amyloglucosidase attached onto the chemically modified MWCNT surface. A 49.0% decrease in its enzymatic activity was observed. Raw, purified, and enzyme-modified MWCNTs were analyzed by scanning and transmission electron microscopy and Raman and X-ray photoelectron spectroscopy. These studies confirmed purification and functionalization of the CNTs. Finally, cyclic voltammetry electrochemistry was used for electrical characterization of CNTs, which showed promising results that can be useful for construction of electrochemical biosensors applied to biological areas.

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Section: Spectroscopy and Microscopy Characterizationmentioning

confidence: 99%