Elucidating some issues regarding the synthesis of superparamagnetic-like single crystalline micrometric Fe3O4 during the hydrothermal process

2015 ◽  
Author(s):  
Mihaela Luminita Kiss ◽  
Marius Chirita ◽  
Alexandru Ionut Chirita Mihaila ◽  
Corina Ana Beljung ◽  
Daniel Niznansky ◽  
...  
Keyword(s):  
Hydrothermal Process ◽  
Single Crystalline

Single-Crystalline Twinned ZnO Nanoleaf Structure via a Facile Hydrothermal Process

2011 ◽  
Vol 11 (3) ◽  
pp. 2175-2184 ◽  
Author(s):  
Jijun Qiu ◽  
Xiaomin Li ◽  
Xiangdong Gao ◽  
Xiaoyan Gan ◽  
Weizhen He ◽  
...  
Keyword(s):  
Hydrothermal Process ◽  
Single Crystalline ◽  
Facile Hydrothermal Process

Synthesis of single crystalline micron-sized rectangular silver bar

2010 ◽  
Vol 25 (2) ◽  
pp. 383-390 ◽  
Author(s):  
Biswajit Mondal ◽  
Dipanwita Majumdar ◽  
Shyamal K. Saha
Keyword(s):  
Cross Section ◽  
Silver Nanowires ◽  
Hydrothermal Process ◽  
Silver Nanostructures ◽  
Total Surface Energy ◽  
Directional Growth ◽  
Single Crystalline ◽  
Reducing Atmosphere ◽  
Nucleation Sites ◽  
Energy Surfaces

The synthesis of single crystalline rectangular silver bar using polyacrylamide (PAM) and silver nitrate (AgNO3) by a hydrothermal process is reported. PAM has been used to create a reducing atmosphere as well as nucleation sites to produce silver seeds along the PAM chain. Several silver nanostructures viz. nanoparticles, growth of silver nanowires, and finally a single crystalline silver nanobar with a square cross section and of several microns in length, depending upon maturity and temperature of the hydrosol, are synthesized. At relatively lower temperatures (above 380 K) and higher pressure amide group of PAM is hydrolyzed with the liberation of ammonia (NH3), which produces a reducing atmosphere. As a result, the degraded PAM chain acts as nucleation sites to produce the assembly of silver nanocrystals along the chain. As the hydrosol becomes more and more mature, a directional growth of silver nanocrystals, called a mesocrystal, is formed. This mesocrystal is converted into single crystals due to fusion of higher energy surfaces (100) of nanocrystals to minimize the total surface energy. This growth process is completed with the formation of a single crystalline rectangular silver bar with a square cross section due to the growth of silver along the [110] direction.

Synthesis of ZnO Flower-Like Nanostructures on GaN Epitaxial Layer by Hydrothermal Process

2007 ◽  
Vol 124-126 ◽  
pp. 555-558 ◽  
Author(s):  
Jae Min Jang ◽  
Sung Hak Yi ◽  
Seung Kyu Choi ◽  
Jeong A Kim ◽  
Woo Gwang Jung
Keyword(s):  
Aqueous Solution ◽  
Hydrothermal Synthesis ◽  
Epitaxial Layer ◽  
Hydrothermal Process ◽  
Xrd Analysis ◽  
Zno Nanostructures ◽  
Single Crystalline ◽  
Zno Nanostructure

3D type flower-like ZnO nanostructure is fabricated on GaN epitaxial layer by hydrothermal synthesis. The formation of ZnO nanostructures is controlled dominantly by pH of the aqueous solution. The microstructure of flower-like ZnO nanostructure was examined by FE-SEM, XRD and FE-TEM. It is found that the shape of ZnO nanostructures are likely flower and chestnut bur shapes. FE-TEM and XRD analysis shows that ZnO nanostructures are single crystalline. Some discussion is made on the mechanism of ZnO growth in solutions with different pH.

Effect of a static magnetic field on the preparation of MnOOH and Mn3O4 by a hydrothermal process

RSC Advances ◽  
2016 ◽  
Vol 6 (25) ◽  
pp. 21037-21042 ◽  
Author(s):  
L. C. Dong ◽  
Y. B. Zhong ◽  
S. Zhe ◽  
T. Y. Zheng ◽  
H. Wang
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Static Magnetic Field ◽  
Hydrothermal Process ◽  
Single Crystalline ◽  
20 Nm ◽  
The Magnetic Field

In this paper, the shape of the samples was changed by the magnetic field. Single-crystalline nanowires (20 nm in diameter and 1 μm in length) of MnOOH were obtained under zero magnetic fields. However, cubic particles of Mn3O4 were formed when a magnetic field was applied.

Synthesis and characterization of single crystalline MnOOH and MnO2 nanorods by means of the hydrothermal process assisted with CTAB

2006 ◽  
Vol 60 (29-30) ◽  
pp. 3895-3898 ◽  
Author(s):  
Jianbo Wu ◽  
Hui Zhang ◽  
Xiangyang Ma ◽  
Jun Li ◽  
Feng Sun ◽  
...  
Keyword(s):  
Hydrothermal Process ◽  
Synthesis And Characterization ◽  
Single Crystalline

Large-scale synthesis of single-crystalline CuO nanoplatelets by a hydrothermal process

2006 ◽  
Vol 41 (4) ◽  
pp. 697-702 ◽  
Author(s):  
Qi Liu ◽  
Hongjiang Liu ◽  
Yongye Liang ◽  
Zheng Xu ◽  
Gui Yin
Keyword(s):  
Large Scale ◽  
Hydrothermal Process ◽  
Single Crystalline ◽  
Large Scale Synthesis

Facile Preparation of the Single Crystalline In2S3 Nanosheets with Highly Efficient Photocatalytic Activity

2013 ◽  
Vol 834-836 ◽  
pp. 8-11
Author(s):  
Hao Yong Yin ◽  
Jun Hong Tang ◽  
Chun Jie Yan ◽  
Qiu Lin Nie ◽  
Dan Wu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Organic Pollutants ◽  
Hydrothermal Process ◽  
Photocatalytic Decomposition ◽  
Single Crystalline ◽  
Highly Efficient ◽  
Sem And Tem ◽  
Facile Preparation ◽  
Facile Hydrothermal Process

The single crystalline In2S3 nanosheets with highly efficient photocatalytic activity have been controllably synthesized via a facile hydrothermal process without adding any surfactant. The morphologies of the nanosheets were characterized by SEM and TEM. The results show the diameter of the nanosheets ranges from 100nm to 400nm. The photocatalytic decomposition of methyl orange on the catalyst shows it has much higher photoactivity than that of nanoTiO2 which means it may be more capable to be used as photocatalyst in decomposition of organic pollutants.

Single crystalline ZnO nanorods grown by a simple hydrothermal process

2009 ◽  
Vol 60 (9) ◽  
pp. 1063-1067 ◽  
Author(s):  
L.Z. Pei ◽  
H.S. Zhao ◽  
W. Tan ◽  
H.Y. Yu ◽  
Y.W. Chen ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Hydrothermal Process ◽  
Single Crystalline ◽  
Simple Hydrothermal Process

Simplified synthesis of single-crystalline magnetic CoFe2O4 nanorods by a surfactant-assisted hydrothermal process

2004 ◽  
Vol 270 (1-2) ◽  
pp. 156-161 ◽  
Author(s):  
G.B. Ji ◽  
S.L. Tang ◽  
S.K. Ren ◽  
F.M. Zhang ◽  
B.X. Gu ◽  
...  
Keyword(s):  
Hydrothermal Process ◽  
Single Crystalline ◽  
Surfactant Assisted

Preparation and Characterizations of ZnO Nanotubes by Acidic Etching Nanowires

2008 ◽  
Vol 8 (9) ◽  
pp. 4432-4435 ◽  
Author(s):  
C. Y. Yao ◽  
G. J. Chen ◽  
T. Y. Tseng
Keyword(s):  
Hydrothermal Process ◽  
Hexagonal Structure ◽  
Zno Nanowires ◽  
Experimental Results ◽  
Etching Process ◽  
Dangling Bonds ◽  
Single Crystalline ◽  
Nanowires Growth ◽  
Zno Nanotubes

Single crystalline ZnO nanowires were synthesized by hydrothermal process and then formed nanotubes by acidic etching these nanowires in acetic solution at 85 °C. The nanotube diameter can be easily controlled by dividing the nanowires growth and etching process. The ZnO nanotubes remain single crystalline hexagonal structure after the etching process. The defects existed in the nanowires and the dangling bonds of the nanowires' surface play the important roles for the etching process. An etching model for forming ZnO nanotubes is proposed, which can be proved by our experimental results.

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