Improvement of Thermoelectric Properties of Bi0.4Sb1.6Te3 with Addition of Nanoscale Zinc Oxide Particles

2015 ◽  
Vol 45 (3) ◽  
pp. 1266-1270 ◽  
Author(s):  
Ye Xiao ◽  
Junyou Yang ◽  
Qinghui Jiang ◽  
Liangwei Fu ◽  
Yubo Luo ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Thermoelectric Properties ◽  
Oxide Particles ◽  
Zinc Oxide Particles

Zinc oxide particles connected by nano-sheets and their heat treatment

2007 ◽  
Vol 13 (5) ◽  
pp. 395-398 ◽  
Author(s):  
Yoshitake Masuda ◽  
Kazumi Kato
Keyword(s):  
Heat Treatment ◽  
Zinc Oxide ◽  
Oxide Particles ◽  
Zinc Oxide Particles

scholarly journals Enviroment-Friendly Synthesis of Nanocrystalline Zinc Oxide Particles Using Fruit Peel Extract

2016 ◽  
Vol 26 (6) ◽  
pp. 311-319 ◽  
Author(s):  
R. Yuvakkumar ◽  
◽  
Jae Sook Song ◽  
Pyung Woo Shin ◽  
Sun Ig Hong
Keyword(s):  
Zinc Oxide ◽  
Fruit Peel ◽  
Oxide Particles ◽  
Zinc Oxide Particles ◽  
Nanocrystalline Zinc Oxide ◽  
Peel Extract

Fabrication of Polyaniline on Silane-Functionalized Zinc Oxide

2018 ◽  
Vol 775 ◽  
pp. 94-98 ◽  
Author(s):  
James Christian M. Dizon ◽  
Alvin Karlo Garcia Tapia ◽  
Ivy Razado-Colambo ◽  
Marvin U. Herrera
Keyword(s):  
Zinc Oxide ◽  
Coupling Agent ◽  
Oxidative Polymerization ◽  
Ethanol Solution ◽  
Ftir Spectra ◽  
Polymeric Chain ◽  
Oxide Particles ◽  
Zinc Oxide Particles ◽  
Aniline Polymerization

In this study, polyaniline on silane-functionalized zinc oxide was fabricated. The zinc oxide particles were functionalized by soaking in silane aniline-ethanol solution. Afterwhich, the polyaniline was polymerized on the grafted silane aniline molecules using oxidative polymerization. The FTIR spectra showed vibrational peaks associated with the silane aniline molecules and grafted polyaniline. The sampled soaked in silane aniline coupling agent showed FTIR peaks associated with grafted silane aniline. The sample soaked for one minute showed FTIR peaks associated with ortho-coupled aniline units that is formed during the start of aniline polymerization. The sample soaked for three minutes showed FTIR peaks that is broader compared to others due to ring vibration in long polymeric chain.

Effects of nano cerium (IV) oxide and zinc oxide particles on biogas production

2015 ◽  
Vol 102 ◽  
pp. 165-171 ◽  
Author(s):  
Duc Nguyen ◽  
C. Visvanathan ◽  
P. Jacob ◽  
V. Jegatheesan
Keyword(s):  
Zinc Oxide ◽  
Biogas Production ◽  
Oxide Particles ◽  
Zinc Oxide Particles

Submicrometer zinc oxide particles: Elaboration in polyol medium and morphological characteristics

1995 ◽  
Vol 10 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Didier Jézéquel ◽  
Jean Guenot ◽  
Noureddine Jouini ◽  
Fernand Fiévet
Keyword(s):  
Zinc Oxide ◽  
Zinc Acetate Dihydrate ◽  
Morphological Characteristics ◽  
Spherical Particles ◽  
Zinc Salt ◽  
High Yield ◽  
Polyol Medium ◽  
Oxide Particles ◽  
Zinc Oxide Particles ◽  
Hydrolysis Of

A novel and easy route for preparing submicrometer particles of zinc oxide, involving hydrolysis of zinc salt in a polyol medium, is proposed. Zinc acetate dihydrate and diethyleneglycol appear to be the best candidates for obtaining a high yield of particles with well-defined morphological characteristics. Monodisperse spherical particles in the submicrometer range (0.2−0.4 μm) have been obtained for a salt concentration less than 0.1 mol 1−1. The particle size depends mainly on the heating rate. The particles are microporous (surface area: 80 m2 g−1) and are formed by aggregation of small crystallites (10 nm). Calcination at moderate temperature drastically reduces this porosity without significant interparticle sintering. At higher concentration, no aggregation occurs and tiny single crystallite particles are obtained.

scholarly journals Cell-biological effects of zinc oxide spheres and rods from the nano- to the microscale at sub-toxic levels

2020 ◽  
Author(s):  
M. Olejnik ◽  
M. Kersting ◽  
N. Rosenkranz ◽  
K. Loza ◽  
M. Breisch ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Zinc Oxide ◽  
Zinc Acetate ◽  
Culture Medium ◽  
Biological Effects ◽  
Oxygen Species ◽  
Cell Culture Medium ◽  
Oxide Particles ◽  
Zinc Oxide Particles

AbstractZinc oxide particles were synthesized in various sizes and shapes, i.e., spheres of 40-nm, 200-nm, and 500-nm diameter and rods of 40∙100 nm2 and 100∙400 nm2 (all PVP-stabilized and well dispersed in water and cell culture medium). Crystallographically, the particles consisted of the hexagonal wurtzite phase with a primary crystallite size of 20 to 100 nm. The particles showed a slow dissolution in water and cell culture medium (both neutral; about 10% after 5 days) but dissolved within about 1 h in two different simulated lysosomal media (pH 4.5 to 4.8). Cells relevant for respiratory exposure (NR8383 rat alveolar macrophages) were exposed to these particles in vitro. Viability, apoptosis, and cell activation (generation of reactive oxygen species, ROS, release of cytokines) were investigated in an in vitro lung cell model with respect to the migration of inflammatory cells. All particle types were rapidly taken up by the cells, leading to an increased intracellular zinc ion concentration. The nanoparticles were more cytotoxic than the microparticles and comparable with dissolved zinc acetate. All particles induced cell apoptosis, unlike dissolved zinc acetate, indicating a particle-related mechanism. Microparticles induced a stronger formation of reactive oxygen species than smaller particles probably due to higher sedimentation (cell-to-particle contact) of microparticles in contrast to nanoparticles. The effect of particle types on the cytokine release was weak and mainly resulted in a decrease as shown by a protein microarray. In the particle-induced cell migration assay (PICMA), all particles had a lower effect than dissolved zinc acetate. In conclusion, the biological effects of zinc oxide particles in the sub-toxic range are caused by zinc ions after intracellular dissolution, by cell-to-particle contacts, and by the uptake of zinc oxide particles into cells.

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