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Controlling the Optical, Electrical and Chemical Properties of Carbon Inverse Opal by Nitrogen Doping
Author(s) -
MorelosGómez Aarón,
ManiGonzález Pierre G.,
Aliev Ali E.,
MuñozSandoval Emilio,
HerreraGómez Alberto,
Zakhidov Anvar A.,
Terrones Humberto,
Endo Morinobu,
Terrones Mauricio
Publication year - 2014
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201303391
Subject(s) - materials science , x ray photoelectron spectroscopy , raman spectroscopy , crystallinity , scanning electron microscope , analytical chemistry (journal) , doping , spectroscopy , transmission electron microscopy , nitrogen , chemical engineering , nanotechnology , optoelectronics , optics , composite material , organic chemistry , chemistry , physics , quantum mechanics , engineering
Nitrogen‐doped carbon inverse opal (CIO‐N) is synthesized by a two‐step process involving the infiltration of carbon‐nitrogen precursors within opals followed by the thermolysis and removal of the opal structure in hydrofluoric acid (HF). Undoped samples exhibit a reflection peak in the red region of the spectrum whereas N‐doped samples display shifts to the blue region of the spectrum as the nitrogen content is increased. The degree of crystallinity of CIO‐N strongly depends upon the nitrogen content and on the size of the precursor silica particles used to prepare the inverted opals. In addition, the introduction of nitrogen into the samples is able to increase the electrical conductivity by one order of magnitude from 2 to 30 S cm ‐1 (at room temperature). All samples are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X‐ray diffraction (XRD), Raman spectroscopy, X‐ray photoelectron spectroscopy (XPS), ultraviolet‐visible (UV‐Vis) spectroscopy, and electrical conductivity measurements. It is envisaged that CIO‐N could have important applications in the fabrication of photonic crystals, photoconducting materials, molecular sensors, field emission devices, capacitors, batteries, among many others.