TY - JOUR
T1 - X-ray Absorption Studies on Cu-doped ZnO Nanoparticles Synthesized by Coprecipitation Method
AU - Daratika, D. A.
AU - Saiyasombat, C.
AU - Kamonsuangkasem, K.
AU - Baqiya, M. A.
AU - Darminto,
N1 - Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
PY - 2018
Y1 - 2018
N2 - Copper-doped ZnO (CZO) nanoparticles have successfully been synthesized by coprecipitation method with Cu concentrations ranging from 0 to 5 wt%. The effect of Cu concentration on electrical properties and the oxidation state of ZnO were investigated. The x-ray diffraction (XRD) pattern analysis shows CZO phase formed with calcination at 400°C for 3 h. The crystal size of CZO nanoparticles, evaluated using MAUD software, is in the range of 56 - 90 nm. It was obtained that the Cu doping has reduced the optical band gap from 2.85 eV to 3.06 eV, while the electrical conductivity increased from 1.03 x 10-8 to 24.25 x 10-8 S/cm. The highest conductivity of CZO is achieved by the sample doped with 4 wt% Cu. This result has been further studied by the x-ray absorption near edge spectroscopy (XANES) measurement at Cu K-edge related to the oxidation state of the Cu ions substituting Zn sites.
AB - Copper-doped ZnO (CZO) nanoparticles have successfully been synthesized by coprecipitation method with Cu concentrations ranging from 0 to 5 wt%. The effect of Cu concentration on electrical properties and the oxidation state of ZnO were investigated. The x-ray diffraction (XRD) pattern analysis shows CZO phase formed with calcination at 400°C for 3 h. The crystal size of CZO nanoparticles, evaluated using MAUD software, is in the range of 56 - 90 nm. It was obtained that the Cu doping has reduced the optical band gap from 2.85 eV to 3.06 eV, while the electrical conductivity increased from 1.03 x 10-8 to 24.25 x 10-8 S/cm. The highest conductivity of CZO is achieved by the sample doped with 4 wt% Cu. This result has been further studied by the x-ray absorption near edge spectroscopy (XANES) measurement at Cu K-edge related to the oxidation state of the Cu ions substituting Zn sites.
UR - http://www.scopus.com/inward/record.url?scp=85053482988&partnerID=8YFLogxK
U2 - 10.1088/1757-899X/395/1/012002
DO - 10.1088/1757-899X/395/1/012002
M3 - Conference article
AN - SCOPUS:85053482988
SN - 1757-8981
VL - 395
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012002
T2 - 7th Nanoscience and Nanotechnology Symposium, NNS 2017
Y2 - 22 October 2017 through 24 October 2017
ER -