Structure-Dependent CO2 Gas Sensitivity of La2O2CO3 Thin Films

Rare earth oxycarbonates are potential candidate materials for constructing simple and low-cost chemiresistive sensors for monitoring carbon dioxide (CO2) gas in the living and working environment for personal comfort and health reasons. Also, measurement of CO2 concentrations is needed in many industrial processes. Specifically, sol-gel made nanoparticles of Nd and La oxycarbonates have been studied previously as novel CO2 gas sensor materials. In this paper, pulsed laser deposition of La oxycarbonate (La2O2CO3) thin films was studied and structural properties of obtained thin films were characterized. Also, CO2 gas sensing ability of synthesized films was evaluated. The films deposited under CO2 partial pressure in various conditions were all Raman amorphous. In situ or ex situ annealing procedure at high CO2 partial pressure was needed for obtaining crystalline La2O2CO3 films, whereby hexagonal and monoclinic polymorphs were obtained in ex situ and in situ processes, respectively. Sensor structure, made using in situ process, was sensitive to CO2 gas and showed relatively fast response and recovery characteristics.

[1]  D. Koziej,et al.  High-energy resolution X-ray absorption and emission spectroscopy reveals insight into unique selectivity of La-based nanoparticles for CO2 , 2015, Proceedings of the National Academy of Sciences.

[2]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[3]  H. Fjellvåg,et al.  On the Crystal Structure of Ln2O2CO3 II (Ln=La and Nd) , 2001 .

[4]  H. Mändar,et al.  Luminescence characterization of ultrathin MgO films of high crystallinity prepared by pulsed laser deposition , 2009 .

[5]  E. Schaumann.  A. Herstellung (I) , 1993 .

[6]  B. Raveau,et al.  Tailored superlattices containing distinct oxide and oxycarbonate blocks grown by pulsed laser deposition , 1997 .

[7]  Rafael García,et al.  Thermal evolution of a sample of La2O3 exposed to the atmosphere , 1993 .

[8]  Aaas News,et al.  Book Reviews , 1893, Buffalo Medical and Surgical Journal.

[9]  M. Sanjuán,et al.  Spectroscopic study of the competition between dehydration and carbonation effects in La2O3-based materials , 2013 .

[10]  W. Assmann,et al.  Ba–Ca–Cu oxycarbonate thin films, prepared by pulsed laser deposition: structure, growth mechanism and superconducting properties , 1999 .

[11]  L. Eyring,et al.  Rare earth dioxymonocarbonates and their decomposition , 1969 .

[12]  Bias dependent NO2 sensitivity of SnO2 thin films at room temperature , 2013 .

[13]  D. Christen,et al.  Superconductivity in epitaxial films of the oxycarbonate Sr2CuO2(CO3) converted from ‘‘infinite layer’’ SrCuO2 by thermal processing , 1995 .

[14]  P. Willmott,et al.  Pulsed laser vaporization and deposition , 2000 .

[15]  L. Eyring,et al.  Herstellung, Analyse und röntgenographische Identifizierung der Dioxymonocarbonate des Lanthans und der Lanthanidenelemente , 1972 .

[16]  Jean-Raymond Gavarri,et al.  Carbonatation and Decarbonatation Kinetics in the La2O3-La2O2CO3 System under CO2 Gas Flows , 2010 .

[17]  T. Turkki,et al.  Preparation, Thermal Stability and Luminescence Properties of Selected Rare Earth Oxycarbonates. , 1992 .

[18]  Yude Wang,et al.  Lanthanum Dioxide Carbonate La2O2CO3 Nanorods as a Sensing Material for Chemoresistive CO2 Gas Sensor , 2014 .

[19]  A. Spetz,et al.  Recent trends in Silicon Carbide (SiC) and Graphene based gas sensors , 2013 .

[20]  Li Mei,et al.  PULSED LASER DEPOSITION OF THIN FILMS , 2000 .

[21]  J. A. Díaz,et al.  Study of some aspects of the reactivity of La2O3 with CO2 and H2O , 1985 .

[22]  O. Tan,et al.  Semiconductor gas sensors , 2013 .

[23]  N. Bârsan,et al.  Rare earth oxycarbonates as a material class for chemoresistive CO2 gas sensors , 2010 .

[24]  Mark Voorneveld,et al.  Preparation , 2018, Games Econ. Behav..