GAS SENSITIVE ELEMENTS BASED ON ORGANIC-INORGANIC NANOCOMPOSITES
Background. For today there is high need of cheap portable gas sensors for operational monitoring of the environment and the atmosphere in different areas of life and industry. Recently, hybrid nanosystems based on conductive polymers reinforced with semiconductor nanoparticles of different nature are in the focus of increased attention as materials for sensor elements.
Objective. Creating sensitive elements based on composite films of poly-3,4-ethylenedioxythiophene combined with nanocrystals of porous silicon and zinc oxide and studying the electrical response to the absorption of gas molecules.
Methods. The structure of ZnO nanoparticles and porous silicon powder was examined with X-ray diffraction. Organicinorganic hybrid films were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. To evaluate the sensor properties, electrical response of obtained composite films due to adsorption of ammonia and ethanol molecules were studied.
Results. Our studies suggest some interaction between organic and inorganic components in the formed hybrid monolithic film. Increasing of nanocomposite electrical resistance due to adsorption of ammonia and ethanol molecules was registered. It was established that the maximum sensitivity of the hybrid films is observed at low concentration ranges. The kinetics of the response of the hybrid composites to the changing concentration of gas molecules is fast enough to be employed in various microelectronic chemical sensors.
Conclusions. The combination of the porous silicon and zinc oxide nanoparticles provides an increasing of surface area of the sensors based on organic-inorganic composites and their high sensitivity and selectivity to ethanol and ammonia molecules.
Tsizh B.R., Aksimentyeva O.I., Chokhan M.I., Portak Yu.R. Sensitive elements of resistive gas sensors based on organic semiconductors // Molec. Cryst. Liq. Cryst. – 2011. – Vol. 535. – P. 220–224.
Tsizh B.R., Aksimentyeva O.I., Vertsimakha Ya.I., Lutsyk P.M., Chokhan M.I. Effect of ammonia on optical absorption of polyaniline films // Molec. Cryst. Liq. Cryst. – 2014. – Vol. 589. – P. 116–123.
Martín J., Maiz J., Sacristan J., Mijangos C. Tailored polymer-based nanorods and nanotubes by “template synthesis”: From preparation to applications // Polymer. – 2012. – Vol. 53. – P. 1149–1166.
Bai H., Shi G. Gas sensors based on conducting polymers // Sensors. – 2007. – Vol. 7. – P. 267–307.
Saxena V., Malhotra B.D. Prospects of conducting polymers in molecular electronics // Curr. App. Phys. – 2003. – Vol. 3. – P. 293–305.
Francis R., Joy N., Aparna P., Vijayan R. Polymer grafted inorganic nanoparticles, preparation, properties, and applications: A review // Polymer Rev. – 2014. – Vol. 54. – P. 268–347.
Olenych I.B., Aksimentyeva O.I., Monastyrskii L.S., Horbenko Y.Y., Yarytska L.I. Sensory properties of hybrid composites based on poly(3,4-ethylene dioxythiophene)-porous silicon-carbon nanotubes //
Nanoscale Res. Lett. – 2015. – Vol. 10. – P. 187.
Jian J., Guo X., Lin L., Cai Q., Cheng J., Li J. Gas-sensing characteristics of dielectrophoretically assembled composite film of oxygen plasma-treated SWCNTs and PEDOT/PSS polymer // Sensor Actuator B. – 2013. – Vol. 178. – P. 279–288.
Нeeger A.J. Semiconducting and metallic polymers: the fourth generation of polymeric materials // Synth. Metals. – 2002. – Vol. 123. – P. 23–42.
Leclere Ph., Surin M., Brocorens P., Cavallini M., Biscarini F., Lazzaroni R. Supramolecular assembly of conjugated polymers: From molecular engineering to solid-state properties // Mater. Sci. Engin. R. – 2006. – Vol. 55. – P. 1–56.
Pyshkina O., Kubarkov A., Sergeyev V. Poly(3,4-ethylenedioxy-thiophene): synthesis and properties // Mater. Sci. App. Chem. – 2010. – Vol. 21. – P. 51–54.
Latessa G., Brunetti F., Reale A., Saggio G., Di Carlo A. Piezoresistive behaviour of flexible PEDOT:PSS based sensor // Sensor Actuator B. – 2009. – Vol. 139. – P. 304–309.
Ouyang J., Xu Q., Chu C.-W., Yang Y., Li G., Shinar J. On the mechanism of conductivity enhancement in poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) film through solvent treatment // Polymer. – 2004. – Vol. 45. – P. 8443–8450.
Moezzi A., McDonagh A.M., Cortie M.B. Review: Zinc oxide particles: Synthesis, properties and applications // Chem. Eng. J. – 2012. – Vol. 185–186. – P. 1–22.
Wang Z.L. Zinc oxide nanostructures: growth, properties and applications // J. Phys.: Condens. Mat. –2004. – Vol. 16. – P. R829–R858.
Tsizh B., Aksimentyeva O., Lazorenko V., Chokhan M. Structure and gas sensitivity of the ZnO sensor of ethanol // Solid State Phenom. – 2013. – Vol. 200. – P. 305–310.
Shukla S.K., Singh N.B., Rastogi R.P. Efficient ammonia sensing over zinc oxide/polyaniline nanocomposite // Ind. J. Engin. Mater. Sci. – 2013. – Vol. 20. – P. 319–324.
Yao I.C., Lin P., Tseng T.Y. Hydrogen gas sensors using ZnO–SnO2 core–shell nanostructure // Adv. Sci. Lett. – 2010. – Vol. 3. – P. 548–553.
Cullis A.G., Canham L.T., Calcott P.D.J. The structural and luminescence properties of porous silicon // J. Appl. Phys. – 1997. – Vol. 82. – P. 909–965.
Föll H., Christophersen M., Carstensen J., Hasse G. Formation and application of porous silicon // Mater. Sci. Eng. R. – 2002. – Vol. 39. – P. 93–141.
Bisi O., Ossicini S., Pavesi L. Porous silicon: a
quantum sponge structure for silicon based
optoelectronics // Surf. Sci. Rep. – 2000. – Vol. 38. – P.
Ozdemir S., Gole J. The potential of porous silicon gas sensors // Curr. Opin. Solid State Mater. Sci. – 2007. – Vol. 11. – P. 92–100.
Olenych I.B., Monastyrskii L.S., Aksimentyeva O.I., Sokolovskii B.S. Effect of bromine adsorption on the charge transport in porous silicon – silicon structures // Electron Mater Lett. – 2013. – Vol. 9. – P. 257–260.
Roisnel T., Rodriguez-Carvajal J. WinPLOTR: a Windows tool for powder diffraction patterns analysis // Mater. Sci. Forum. – 2001. – Vol. 378–381. – P. 118–123.
Niwano M. In-situ IR observation of etching and oxidation processes of Si surfaces // Surf. Sci. – 1999. – Vol. 427-428. – P. 199–207.
Borghesi A., Sassella A., Pivac B., Pavesi L. Characterization of porous silicon inhomogeneities by high spatial resolution infrared spectroscopy // Sol. St. Commun. – 1993. – Vol. 87. – P. 1–4.
Han M.G., Foulger S.H. Preparation of poly(3,4- etylendioxythiophene) (PEDOT) coated silica coreshell particles and PEDOT hollow particles // Chem. Commun. – 2004. – Vol. 19. – P. 2154–2155.
Vashpanov Yu.А., Smyntyna V.A. Adsorption Sensitivity of Semiconductors. – Odesa: Astroprint, 2005 (in Russian).
Olenych I.B., Monastyrskii L.S., Aksimentyeva O.I., Sokolovskii B.S. Humidity sensitive structures on the basis of porous silicon // Ukr. J. Phys. -2011. – Vol. 56. – P. 1198–1202.