Hydrothermal Synthesis of CrO2 Nanoparticle Arrays on Ti nano-pit Array Templates

NANO ◽  
2018 ◽  
Vol 13 (01) ◽  
pp. 1850010 ◽  
Author(s):  
Xiaoling Wang ◽  
Lu Wang ◽  
Tao Lin ◽  
Hailiang Huang ◽  
Gehui Wen
Keyword(s):  
Aqueous Solution ◽  
Hydrothermal Synthesis ◽  
Surface Density ◽  
Easy Axis ◽  
Magnetic Behavior ◽  
Chromium Dioxide ◽  
Nanoparticle Arrays ◽  
Large Area ◽  
Nanotube Array ◽  
Honeycomb Pattern

Chromium dioxide (CrO[Formula: see text] nanoparticle arrays were fabricated on Ti nano-pit array templates by hydrothermal synthesis using CrO3 aqueous solution as precursor. The Ti nano-pit array template was obtained by stripping TiO2 nanotube array formed on the Ti foil. CrO2 nanoparticles are arranged in honeycomb pattern in a large area and their surface density reaches [Formula: see text][Formula: see text]cm[Formula: see text]. The CrO2 nanoparticle arrays show typical magnetic behavior, and the easy axis is parallel to the plane of Ti nano-pit array template. The influence of the concentration of CrO3 aqueous solution on the CrO2 nanoparticle arrays is studied and the mechanism of the formation of the CrO2 nanoparticle arrays is briefly discussed.

scholarly journals ᶫ-Leucine Loading and Release in MIL-100 Nanoparticles

2020 ◽  
Vol 21 (24) ◽  
pp. 9758
Author(s):  
Ivan E. Gorban ◽  
Mikhail A. Soldatov ◽  
Vera V. Butova ◽  
Pavel V. Medvedev ◽  
Olga A. Burachevskaya ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrothermal Synthesis ◽  
Cell Model ◽  
Metal Organic Framework ◽  
Acetic Acid Solution ◽  
Sorption Isotherms ◽  
Microwave Assisted Synthesis ◽  
High Porosity ◽  
Cytotoxicity Studies ◽  
Vis Spectroscopy

Synthesis of the MIL-100 metal-organic framework particles was carried out by hydrothermal (HT) and microwave (MW)-assisted methods. Transmission electron microscopy showed formation of microparticles in the course of hydrothermal synthesis and nanoparticles for microwave-assisted synthesis. Powder X-ray diffraction confirmed formation of larger crystallites for hydrothermal synthesis. Particle aggregation in aqueous solution was observed by dynamic light scattering. However, the stability of both samples could be improved in acetic acid solution. Nitrogen sorption isotherms showed high porosity of the particles. ᶫ-leucine molecule was used as a model molecule for loading in the porous micro- and nanoparticles. Loading was estimated by FTIR spectroscopy and thermogravimetric analysis. UV-VIS spectroscopy quantified ᶫ-leucine release from the particles in aqueous solution. Cytotoxicity studies using the HeLa cell model showed that the original particles were somewhat toxic, but ᶫ-leucine loading ameliorated the toxic effects, likely due to signaling properties of the amino acid.

Hydrothermal synthesis, structure and magnetic properties of a three-dimensional cobalt(ii) – aminophenyltetrazolate coordination polymer

2014 ◽  
Vol 43 (19) ◽  
pp. 7263-7268 ◽  
Author(s):  
Tiffany M. Smith ◽  
Michael Tichenor ◽  
Yuan-Zhu Zhang ◽  
Kim R. Dunbar ◽  
Jon Zubieta
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Hydrothermal Synthesis ◽  
Coordination Polymer ◽  
Three Dimensional ◽  
Magnetic Behavior ◽  
Ac Magnetic Susceptibility

The three-dimensional [Co3(OH)2(H2O)2(aptet)4] exhibits magnetic properties consistent with a ferrimagnetic chain with the non-compensating resultant moment of one Co(ii) per trinuclear Co(ii) subunit and ac magnetic susceptibility indicative of glassy-like magnetic behavior.

scholarly journals Arrayed ZnO Nanorods Fabrication on ZnO Film by Self-catalyst Growth Method in Aqueous Solution

2013 ◽  
Vol 1584 ◽  
Author(s):  
E. K.C. Pradeep ◽  
X. Li ◽  
T. Kawaharamura ◽  
D. Wang ◽  
A. Hatta ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Reaction Time ◽  
Hydrothermal Synthesis ◽  
Aspect Ratio ◽  
High Aspect Ratio ◽  
Zno Nanorods ◽  
Zno Film ◽  
Growth Method

ABSTRACTZnO nanorods were grown up from as-deposited ZnO film on which the zinc self-catalysts generated by a novel reducing method. Well aligned ZnO nanorods with a uniform high aspect ratio were grown up on multi-annealed samples. The length of nanorods depended significantly on the reaction time in the hydrothermal synthesis.

Hydrothermal Synthesis and Spectroscopic and Magnetic Behavior of the Mn7(HOXO3)4(XO4)2(X=As, P) Compounds. Crystal Structure of Mn7(HOAsO3)4(AsO4)2

2002 ◽  
Vol 165 (1) ◽  
pp. 171-177 ◽  
Author(s):  
José M. Rojo ◽  
Aitor Larrañaga ◽  
José L. Mesa ◽  
Miren K. Urtiaga ◽  
José L. Pizarro ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Synthesis ◽  
Magnetic Behavior
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