首页|Optical detection of C2 hydrocarbons ethane, ethylene, and acetylene with a photonic crystal made from carbonized porous silicon

Optical detection of C2 hydrocarbons ethane, ethylene, and acetylene with a photonic crystal made from carbonized porous silicon

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  • NSTL
  • Elsevier
Carbon/porous silicon composite films are prepared by thermolysis of a poly(furfuryl alcohol) (PFA) precursor in a porous silicon photonic crystal template that results in a glassy carbon layer that coats the internal surface of the pores. The carbon/porous silicon composites are evaluated for their application as optical sensors for C_2 hydrocarbon gases. The porous silicon templates are prepared by electrochemical anodization of either highly doped (p++) or moderately doped (p+) p-type silicon. The percent loading of carbon in the composites is varied and the change in reflectance spectrum and sensitivity monitored. Increased carbon loading corresponds to a decrease in the reflectance of the photonic stop band and an increase in sensitivity toward ethane. Sensitivity of the composites toward C_2 hydrocarbons is also found to scale with increasing surface area, with p+ carbon/porous silicon composites having the largest surface area and being the most sensitive. The detection limit for the C_2 hydrocarbons is 0.2% (v/v) in a nitrogen carrier gas, which is >10 times below the lower flammable limit.

SensorPorous siliconPhotonic crystalPyrolysisCarbonizationSurface area

Danny Yuan Chan、Adrian Garcia Sega、Jessica Y. Lee、Ting Gao、Frèderique Cunin、Francesco Di Renzo、Michael J. Sailor

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University of California, San Diego, Department of Chemistry and Biochemistry, 9500 Gilman Drive, m/c 0358, La Jolla, CA 92093-0358, USA

TE Connectivity, 306 Constitution Drive, M.S. R33-2A, Menlo Park, CA, USA

Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-ENSCM-UM2-UM1, Ecole Nationale Supérieure de Chimie de Montpellier, 34296 Montpellier, France

2014

10.1016/j.ica.2014.07.069

Inorganica Chimica Acta

Inorganica Chimica Acta

EISCI
ISSN：0020-1693
年,卷(期)：2014.422
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