Seed-Mediated Synthesis of one-Dimensional Fe3O4 Particles under Magnetic Field

2011 ◽  
Vol 311-313 ◽  
pp. 576-580
Author(s):  
Pei Feng Yu ◽  
Xi Yun Yang ◽  
Hai Wei Yuan
Keyword(s):  
Magnetic Field ◽  
Reaction Time ◽  
Aspect Ratio ◽  
Seed Size ◽  
Volume Ratio ◽  
Iron Salt ◽  
One Dimensional ◽  
Growth Method ◽  
Magnetite Particles ◽  
Seed Mediated

One-dimensional magnetite particles were prepared by a seed-mediated growth method under magnetic field. The amount of seed, seed size, PolyvinylPyrrolidone concentration (PVP) and reaction time have a significant effect on the morphology of the samples. The addition of a small amount of 100nm seeds leads to obtain rod-like particles, while chain-like particles are formed when the seed size is increased to 700 nm. The aspect ratio of the rod is controlled by varying the volume ratio of seed to iron salt. Increasing the reaction time is favorable to the formation of chain-like particles.

Effect of aspect ratio on the chirality of gold nanorods prepared through conventional seed-mediated growth method

2021 ◽  
Vol 1152 ◽  
pp. 338277
Author(s):  
Xiaojuan Zhou ◽  
Qiang Liu ◽  
Xiaoyu Shi ◽  
Chunli Xu ◽  
Baoxin Li
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
Growth Method ◽  
Seed Mediated

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.

ONE-DIMENSIONAL MAGNETITE CHAINS OF NANOPARTICLES SYNTHESIS BY SELF-ASSEMBLY IN MAGNETIC FIELD

2005 ◽  
Vol 19 (15n17) ◽  
pp. 2757-2762 ◽  
Author(s):  
Y. ZHANG ◽  
R. SHI ◽  
H. Q. XIONG ◽  
Y. ZHAI ◽  
Y. K. SUN
Keyword(s):  
Magnetic Field ◽  
Self Assembly ◽  
Hysteresis Loops ◽  
Chain Structure ◽  
Silicon Substrates ◽  
Vibrating Sample Magnetometer ◽  
Magnetite Particle ◽  
Ferrous Hydroxide ◽  
One Dimensional ◽  
Magnetite Particles

Magnetite chains of spheres with different radii and lengths were prepared by aging ferrous hydroxide gel with 0.2M KNO3 under different external magnetic fields which induced the ultra-fine magnetite particles to combine into chain structure. The magnetite particle size and the chain length could be adjusted by varying the field intensity. The chains could be deposited on silicon substrates to form aligned structure in magnetic field. The hysteresis loops were measured in different directions by a vibrating sample magnetometer (VSM). The structure and magnetic properties were discussed.

scholarly journals Investigation of thermal conductivity property of plasmonic nanofluids based on gold nanorods prepared by seed-mediated growth method

2019 ◽  
Vol 2 (22) ◽  
pp. 119-133
Author(s):  
Mahsa Mohammadzadeh ◽  
Mohsen Ashjari ◽  
Davoud Zare
Keyword(s):  
Thermal Conductivity ◽  
Aspect Ratio ◽  
Gold Nanorods ◽  
Thermal Conductivity Coefficient ◽  
Volume Fraction ◽  
Effect Of Temperature ◽  
Basic Fluid ◽  
Vis Spectroscopy ◽  
Growth Method ◽  
Seed Mediated

In this paper, nanofluids were prepared based on gold nanorods in basic fluid, water, by single-stage chemical reduction and in different volume fractions and the used gold nanorods were synthesized by seed-mediated growth method in different dimensional ratios. The properties of the prepared nanoparticles, including crystalline size, aspect ratio, surface properties, nanoparticle purity, shape and morphology of nanostructures were investigated using x-ray diffraction, UV-vis spectroscopy, FT-IR, and transmitted electron microscopy. The effect of changing parameters of Nano rod dimensions, changes in Nano rod volume fraction in water and also the effect of temperature on the nanofluid thermal conductivity coefficient were investigated using transient hot wire method. The results showed that reducing the aspect ratio, increasing the volume fraction and increasing the temperature increase the thermal conductivity. In fact, results show that an increase in the nanorods aspect ratio with a constant volume fraction of 1:50 of gold in water nanorod and at room temperature leads to a decrease in the thermal conductivity of the nanofluid. Also, increasing the two parameters of volume fraction and temperature significantly increases the thermal conductivity coefficient.

The Effect of Nanoseed Concentration on the Aspect Ratio of Gold Nanorod

2011 ◽  
Vol 364 ◽  
pp. 254-259 ◽  
Author(s):  
Sri Nengsih ◽  
Ali Umar Akrajas ◽  
Muhamad Mat Salleh
Keyword(s):  
Aspect Ratio ◽  
Present Approach ◽  
Gold Nanorod ◽  
Growth Solution ◽  
Growth Method ◽  
Potential Alternative ◽  
Seed Mediated ◽  
Drop Structure ◽  
Typical Process

This paper reports the synthesis of gold nanorod with controlled aspect ratio prepared by varying the concentration of nanoseed addition into the growth solution via seed mediated growth method. In typical process, the gold nanorod with aspect ratio from ca. 1.7 to 3.1 can be successfully obtained. The nanorod seems to be perfect rod morphology instead of bone-like or tear drop structure. Owing to the simplicity in preparing the gold nanorod, the present approach could be used as potential alternative for producing gold nanorod with special properties for used in the currently existing application.

scholarly journals Template-Assisted Synthesis of Luminescent Carbon Nanofibers from Beverage-Related Precursors by Microwave Heating

Molecules ◽  
2019 ◽  
Vol 24 (8) ◽  
pp. 1455
Author(s):  
Deeney ◽  
McKiernan ◽  
Belhout ◽  
Rodriguez ◽  
Redmond ◽  
...  
Keyword(s):  
Reaction Time ◽  
Aspect Ratio ◽  
Microwave Heating ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
High Aspect Ratio ◽  
Carbon Nanomaterials ◽  
Short Reaction Time ◽  
One Dimensional ◽  
Template Assisted Synthesis

Luminescent carbon nanomaterials are important materials for sensing, imaging, and display technologies. This work describes the use of microwave heating for the template-assisted preparation of luminescent carbon nanofibers (CNFs) from the reaction of a range of beverage-related precursors with the nitrogen-rich polyethyleneimine. Highly luminescent robust carbon fibers that were 10 to 30 m in length and had a diameter of 200 nm were obtained under moderate conditions of temperature (250–260 °C) and a short reaction time (6 min). The high aspect ratio fibers showed wavelength-dependent emission that can be readily imaged using epifluorescence. The development of these multi-emissive one-dimensional (1D) carbon nanomaterials offers potential for a range of applications.

scholarly journals Ligand-Related Precursors of Luminescent Carbon Nanofibers Synthesized by Microwave Reaction

2019 ◽  
Author(s):  
Clara Deeney ◽  
Eoin P. McKiernan ◽  
Samir A. Belhout ◽  
Brian J. Rodriguez
Keyword(s):  
Reaction Time ◽  
Aspect Ratio ◽  
Microwave Heating ◽  
Carbon Nanofibers ◽  
Carbon Fibers ◽  
High Aspect Ratio ◽  
Carbon Nanomaterials ◽  
Short Reaction Time ◽  
One Dimensional ◽  
Microwave Reaction

Luminescent carbon nanomaterials are important materials for sensing, imaging, and display technologies. This work describes the use of microwave heating for the template-assisted preparation of luminescent carbon nanofibers (CNFs) from the reaction of a range of beverage-related precursors with the nitrogen-rich polyethyleneimine. Highly luminescent robust carbon fibers that were 10 to 30 μm in length and had a diameter of 200 nm were obtained under moderate conditions of temperature (250–260 °C) and a short reaction time (6 min). The high aspect ratio fibers showed wavelength-dependent emission that can be readily imaged using epifluorescence. The development of these multi-emissive one-dimensional (1D) carbon nanomaterials offers potential for a range of applications.

ACTIVATION OF THE TRANSESTERIFICATIONS PROCESS OF VEGETABLE OILS TRIGLYCERIDES WITH METHANOL UNDER THE INFLUENCE OF MAGNETIC FIELD

2015 ◽  
Vol 11 (6) ◽  
pp. 3630-3634
Author(s):  
T.A. Mamedova ◽  
Z.M. Aliyeva ◽  
A.E. Aliyeva ◽  
R.T. Samedov ◽  
V.M. Abbasov ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Fatty Acids ◽  
Reaction Time ◽  
Vegetable Oils ◽  
High Yield ◽  
Alkyl Esters ◽  
Sunflower Oils ◽  
The Magnetic Field

The process of producing mono-alkyl esters of fatty acids from cottonseed and sunflower oils under the influence of the magnetic field with intensity  15-45 mT  was  investigated . It was revealed that the use of the energy of  magnetic field allows to reduce the reaction time to 10 times, the excess of used alcohol to 2 times while maintaining high yield of the desired product.

Sign in / Sign up

Export Citation Format

Share Document