scholarly journals Synthesis and Growth Mechanism of Silver Nanowires through Different Mediated Agents (CuCl2and NaCl) Polyol Process

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Mohd Rafie Johan ◽  
Nurul Azri Khalisah Aznan ◽  
Soo Teng Yee ◽  
Ing Hong Ho ◽  
Soo Wern Ooi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Growth Mechanism ◽  
Silver Nanowires ◽  
Polyol Process ◽  
Silver Nanostructures ◽  
Strong Impact ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Plasmon Peak ◽  
Transmission Electron

Silver nanowires (AgNWs) have been synthesized by polyol process through different mediated agents (CuCl2and NaCl). The presence of cations and anions (Cu(II), Na+, and Cl−) has been shown to have a strong impact on the shape of silver nanostructures. The field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) show uniform nanowires. The UV-vis spectra show that plasmon peak indicated the formation of nanowires. The X-ray diffraction (XRD) pattern displayed that final product was highly crystallized and pure. The growth mechanism of AgNWs was proposed.

Hydrothermal Synthesis and Characterization of BiFeO3 Polyhedral Crystallites

2012 ◽  
Vol 174-177 ◽  
pp. 508-511
Author(s):  
Lin Lin Yang ◽  
Yong Gang Wang ◽  
Yu Jiang Wang ◽  
Xiao Feng Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Synthesis And Characterization ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

BiFeO3 polyhedrons had been successfully synthesized via a hydrothermal method. The as-prepared products were characterized by power X-ray diffraction (XRD) pattern, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The possible mechanisms for the formation of BiFeO3 polyhedrons were discussed. Though comparison experiments, it was found that the kind of precursor played a key role on the morphology control of BiFeO3 crystals.

Preparation and Application of Carboxyl-Functioned Magnetic Nanoparticles for Arylsulfatase Immobilization

2016 ◽  
Vol 13 (10) ◽  
pp. 7408-7415
Author(s):  
Yongxing Li ◽  
Qiong Xiao ◽  
Qin Yin ◽  
Hui Ni ◽  
Yanbing Zhu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Magnetic Nanoparticles ◽  
Vibrating Sample Magnetometry ◽  
X Ray Diffraction ◽  
Sulfate Ester ◽  
Xrd Pattern ◽  
X Ray ◽  
Transmission Electron ◽  
Mean Diameter ◽  
Diffraction Patterns

Arylsulfatase, one of a few enzymes that can enhance the gelling strength of agar by cleaving the sulfate ester bonds in agar, was covalently immobilized with carboxyl functioned magnetic nanoparticles (CMNPs). The resultant CMNPs and immobilized arylsulfatase were characterized by transmission electron microscopy (TEM), Dynamic Light scattering (DLS), X-ray diffraction (XRD), vibrating sample magnetometry (VSM) and thermogravimetric analysis (TGA). The TEM result indicated that the CMNPs and immobilized arylsulfatase had a similar mean particle size of 10 nm. The arylsulfatase-CMNPs had a mean diameter of 1200 nm in aqueous solution determined by the DLS, which was much bigger than the CMNPs (433.6 nm). The different sizes demonstrated that the arylsulfatase was coated on CMNPs successfully. XRD showed that diffraction patterns of the CMNPs and arylsulfatase-CMNPs were close to the standard XRD pattern of Fe3O4. Saturation magnetizations were 52.1 emu/g for carriers and 47.9 emu/g for immobilized arylsulfatase, which indicated that the particles had superparamagnetic characteristics. The TGA revealed that the amount of arylsulfatase bound to the surface of CMNPs was 5.65%. The arylsulfatase exhibited better thermal stability and reusability after immobilization, the immobilized arylsulfatase can retain more than 50% enzyme activity up to the 9th cycle.

Study on the Growth Mechanism of K2Ti4O9 Crystal

2018 ◽  
Vol 37 (5) ◽  
pp. 405-410
Author(s):  
Xuesong Zhou ◽  
Jing Fan ◽  
Xiaoli Wei ◽  
Yi Shen ◽  
Yanzhi Meng
Keyword(s):  
Electron Microscopy ◽  
Growth Mechanism ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Calcination Temperatures ◽  
Transmission Electron ◽  
Transformation Reaction ◽  
Calcination Method ◽  
Potassium Hexatitanate ◽  
Parallel Action

AbstractPotassium hexatitanate (K2Ti4O9) whiskers were prepared by the kneading–drying–calcination method. After the preparation of products under different calcination temperatures and holding times, their morphology and structure were characterized by thermogravimetric and differential thermal, X-ray diffraction (XRD), scanning electron microscopy and transmission electron microscopy. The XRD analysis showed that the reaction mixture was completely converted to K2Ti4O9 crystals at 800 °C when the T/K ratio was 3. Based on the analysis of LS (liquid–solid) growth mechanism, the corresponding transformation reaction mechanism during the roasting was elucidated. K2Ti4O9 whiskers grow mainly through the parallel action at a low temperature. With the increase in temperature, the series effect is obvious.

Growth Mechanism and Characterization of Porous CuS Microspheres

2012 ◽  
Vol 568 ◽  
pp. 348-351
Author(s):  
Shuang Xu ◽  
Nuan Song ◽  
Chang Li Qiu ◽  
Yao Ping Zhang ◽  
Jian Feng Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Growth Mechanism ◽  
Experimental Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

In this paper, a facile method was presented to fabricate CuS porous microspheres, which were formed by the intergrowth of CuS polycrystalline nanoslices. The obtained sample has been characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electronic diffraction (SAED), and scanning electron microscopy (SEM). On the basis of the experimental results, we proposed a self-assemble mechanism to elucidate the formation of CuS nanoslice structure.

scholarly journals Study on Growth Mechanism of Cu Nanowires and Its Application as Transparent Conducting Electrode

2019 ◽  
Vol 19 (1) ◽  
pp. 160
Author(s):  
Dedi Mardiansyah ◽  
Kuwat Triyana ◽  
Harsojo Harsojo
Keyword(s):  
Electron Microscopy ◽  
Growth Mechanism ◽  
Optical Microscope ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cu Nanowires ◽  
Transparent Conducting Electrode ◽  
Transparent Conducting ◽  
Conducting Electrode ◽  
Transmission Electron

Cu nanowires (CuNWs) were synthesized in an aqueous solution at low temperature using ethylenediamine (EDA) as a capping agent and hydrazine as a reducing agent. This study investigated the growth of mechanism CuNWs and fabricated the transparent conducting electrode. For the growth mechanism of CuNWs, the study was conducted with an optical microscope, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). The performance of the transparent conducting electrode was studied with UV-Vis spectrometer and IV meters. CuNWs growth from Cu nanoparticles (CuNPs) in the solution. Transparent conducting electrode gave a sheet resistance of 48.8 Ohm/sq and the transmittance of 52.63%. The understanding of the growing mechanism of Cu nanowires is important for the development of CuNWs for alternative application as a transparent conducting electrode.

Effect of Temperature on Silver Nanorods Synthesized by Polyol Method

2015 ◽  
Vol 1123 ◽  
pp. 256-259 ◽  
Author(s):  
Junaidi ◽  
Kuwat Triyana ◽  
Harini Sosiati ◽  
Edi Suharyadi ◽  
Harsoyo
Keyword(s):  
Bath Temperature ◽  
Polyol Method ◽  
Raw Material ◽  
Effect Of Temperature ◽  
Synthesis Process ◽  
Strong Impact ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Silver Nanorods ◽  
Plasmon Peak

Effect of temperature on the formation of silver nanorods (AgNRs) synthesized using polyol method has been investigated. In this experiment, materials were used silver nitrate (AgNO3) as main raw material, ethylene glycol (EG) as a solvent, small amount of sodium chloride (NaCl) as a mediated agent, while polyvinyl alcohol (PVA) as a capping agent to assist the growth of AgNRs. To apply a constant temperature at each synthesis process, an Erlenmeyer flask containing the sample was immersed in a controllable magnetic stirrer oil bath. It is found that the presence of heat as represented by the temperature of oil bath has been shown to have a strong impact on the AgNRs formation. The scanning electron microscope (SEM) confirmed uniform and high density of AgNRs when the oil bath temperature during polyol process was 140 °C. In the same condition, the UV-vis spectra also confirmed formation process of AgNRs with appearance of the transverse plasmon peak about 350 nm. Finally, the X-ray diffraction (XRD) pattern represented that the final product of AgNRs was highly crystallized.

scholarly journals Effect of Different Mediated Agents on Morphology and Crystallinity of Synthesized Silver Nanowires Prepared by Polyol Process

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Mohammad Taghi Satoungar ◽  
Hamed Azizi ◽  
Saeid Fattahi ◽  
Mohammad Khajeh Mehrizi ◽  
Hedieh Fallahi
Keyword(s):  
Electron Microscopy ◽  
Silver Nanowires ◽  
Vinyl Pyrrolidone ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Solution Field ◽  
Poly Vinyl Pyrrolidone ◽  
Xrd Patterns ◽  
Structural Characterizations

Synthesis and characterization of multiple crystalline silver nanowires (NWs) with uniform diameters were carried out by using 1,2-propandiol and ethylene glycol (EG) as comediated solvents and FeCl3as mediated agent in the presence of poly(vinyl pyrrolidone) (PVP). Experimental data and structural characterizations revealed that AgNWs have evolved from the multiple crystalline seeds initially generated by reduction of AgNO3with EG and 1,2-propandiol followed by reducing Fe(III) to Fe(II) which in turn reacts with and removes adsorbed atomic oxygen from the surfaces of silver seeds. In addition, uniform silver nanowires were obtained by using FeCl2and AlCl3as mediated agents in EG solution. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) showed uniform nanowires in both diameter and length. UV-Vis spectra showed adsorption peaks confirming the formation of nanowires. X-ray diffraction (XRD) patterns displayed the final product with high crystallinity and purity. In this study, a growth mechanism for forming AgNWs was proposed and a comparison between different mediated agents was carried out.

Insights from STEM and NBED studies into the local structure and growth mechanism of misfit layered compounds prepared using modulated reactants

2015 ◽  
Vol 230 (1) ◽  
Author(s):  
Ines Häusler ◽  
Ryan Atkins ◽  
Matthias Falmbigl ◽  
Sven P. Rudin ◽  
Wolfgang Neumann ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Growth Mechanism ◽  
Local Structure ◽  
Layered Compounds ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Misfit Layered Compounds

AbstractX-ray diffraction and transmission electron microscopy were used to probe the structure of the misfit compound [(SnSe)

scholarly journals Growth of ZnO Nanowires in Aqueous Solution by a Dissolution-Growth Mechanism

2008 ◽  
Vol 2008 ◽  
pp. 1-5 ◽  
Author(s):  
Shaojing Bu ◽  
Chunxiang Cui ◽  
Qingzhou Wang ◽  
Ling Bai
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Growth Mechanism ◽  
Zno Nanowires ◽  
Film Morphology ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Morphology And Structure ◽  
Scanning Electron

A novel methodology based on the dissolution-growth mechanism was developed to prepare ZnO nanowires films. The film morphology and structure were investigated by using field emission scanning electron microscopy, high-resolution transmission electron microscopy and X-ray diffraction analysis methods. The results show that the ZnO nanowires are single crystallinec-oriented wurtzite. The ZnO rod crystals were eroded to provide the growth primitive of ZnO nanowires, which formed on top of the rod crystals when the erosion reaction got the equilibrium. The length of the resultant nanowires is rather large because the successive erosion of the rod crystals maintains the low concentration ofZn2O(OH)2n−2in the aqueous solution.

USE OF LIQUID–LIQUID INTERFACE FOR SYNTHESIS OF MAGHEMITE NANOCRYSTALS

2012 ◽  
Vol 19 (02) ◽  
pp. 1250019
Author(s):  
S. BASAVARAJA ◽  
BALAJI D. SAWLE ◽  
MAHESH D. BEDRE ◽  
D. RAGUNANDAN ◽  
L. ARUNKUMAR ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Magnetic Hysteresis ◽  
Magnetic Hysteresis Loop ◽  
Zero Field ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Aqueous Layer

Nanocrystals of maghemite (γ- Fe2O3 ) have been prepared at the interface of organic-aqueous layer by the reaction of ferric acetylacetonate in toluene with sodium hydroxide in aqueous solution. The nanocrystals of γ- Fe2O3 formed at the interface of the organic-aqueous layer have been confirmed by X-ray diffraction (XRD) pattern. The sample has been characterized morphologically by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and atomic force microscopy (AFM) techniques. Magnetic hysteresis loop and zero-field cooling measurements exhibited superparamagnetism behavior for γ- Fe2O3 nanocrystals.

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