The paper discussed a novel structured light-addressable potentiometric sensor (LAPS) array based on PVC membrane for determination of heavy metal cations simultaneously. For LAPS array fabrication, part of the silicon substrate which was defined as non-sensitive area was heavily doped with boron and had thick oxide formation. Then PVC (polyvinyl chloride) membrane for respective cations (Pb2+, Cb2+, Zn2+) was prepared uniformly on corresponding sensitive area. Through new structure, the elaborated LAPS array had the advantages of excellent calibration stability (e.g. lower standard deviation from ±3.1mV to ±0.5mV for Pb-LAPS) and reasonable good selectivity. Sensors based on these membranes had showed a Nernstian response of slope (28.7-29.3mV/dec) over the concentration ranges of 10−5-10−1 mol/L. At the meantime, the electrochemical behavior in terms of the detection limit, linear response range, response time, long-time stability and effect of silanization had also been investegated.
D. Ha, N. Hu, C.X. Wu, Dmitry Kirsanov, Andrey Legin, Maria Khaydukova, P. Wang
Publication date: July 2013Source:Journal of Solid State Chemistry, Volume 203 Author(s): S. Kumar , K. Singh , M. Miclau , Ch. Simon , C. Martin , A. Maignan The change from antiferromagnetism induced ferroelectricity to spin glass ferroelectric relaxor has been studied along the ... more
Publication date: July 2013Source:Journal of Solid State Chemistry, Volume 203 Author(s): Brian B. Kitchen , Nina Verdal , Terrence J. Udovic , John J. Rush , Michael R. Hartman , Daniel J. DeVries To investigate the previously reported low-temperature phase transition in rubidium ... more
Publication date: July 2013Source:Journal of Solid State Chemistry, Volume 203 Author(s): T. Sasikala , L. Rama Moorthy , A. Mohan Babu , T. Srinivasa Rao The present work reports the absorption, photoluminescence and decay properties of singly doped Dy3+ and co-doped Dy3+/Tm3+ ions ... more
Elsevier announced the acquisition through its subsidiary MDL Information Systems GmbH, of the Beilstein Database, the world's largest compilation of chemical facts and the premier database in the field of organic chemistry.
Elsevier has been exclusively involved in both the production an ... more