Temperature dependent DC electrical conductivity studies of ZnO nanoparticle thick films prepared by simple solution combustion method

Naveen, C. S.; Jayanna, H. S.; Lamani, Ashok R.; Rajeeva, M. P.

doi:10.1063/1.4872617

Cited by 3 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is noteworthy that the conductivity of CS-ZnO nanocomposite ( Figure 4 a) is sufficiently lower than the ZnO conductivity ( ca . 1 × 10 −5 S/cm [ 28 , 29 ]) and it decreases with ZnO NPs wt.%.…”

Section: Resultsmentioning

confidence: 99%

“…Bulk conductivity of ZnO is ca. 10 −4 –10 −5 S/cm and it depends upon intrinsic defects created by oxygen vacancies [ 28 , 29 , 30 ]). Conductivity of nanoparticles depends upon grain size, morphology, and microstructure and it is ca.…”

Section: Discussionmentioning

confidence: 99%

“…8.5 [ 27 ] and low conductivity (ca. 10 −4 –10 −5 S/cm, which depends upon intrinsic defects created by oxygen vacancies [ 28 , 29 , 30 ]). Therefore, this material can be considered as a dielectric matrix with dielectric inclusions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Chitosan-ZnO Nanocomposites Assessed by Dielectric, Mechanical, and Piezoelectric Properties

et al. 2020

View full text Add to dashboard Cite

The aim of this work is to structurally characterize chitosan-zinc oxide nanoparticles (CS-ZnO NPs) films in a wide range of NPs concentration (0–20 wt.%). Dielectric, conductivity, mechanical, and piezoelectric properties are assessed by using thermogravimetry, FTIR, XRD, mechanical, and dielectric spectroscopy measurements. These analyses reveal that the dielectric constant, Young’s modulus, and piezoelectric constant (d33) exhibit a strong dependence on nanoparticle concentration such that maximum values of referred properties are obtained at 15 wt.% of ZnO NPs. The piezoelectric coefficient d33 in CS-ZnO nanocomposite films with 15 wt.% of NPs (d33 = 65.9 pC/N) is higher than most of polymer-ZnO nanocomposites because of the synergistic effect of piezoelectricity of NPs, elastic properties of CS, and optimum NPs concentration. A three-phase model is used to include the chitosan matrix, ZnO NPs, and interfacial layer with dielectric constant higher than that of neat chitosan and ZnO. This layer between nanoparticles and matrix is due to strong interactions between chitosan’s side groups with ZnO NPs. The understanding of nanoscale properties of CS-ZnO nanocomposites is important in the development of biocompatible sensors, actuators, nanogenerators for flexible electronics and biomedical applications.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%