Preparation and analysis of electrochromic properties of poly(3,4 ethylene dioxythiophene)

2020 ◽  
Vol 10 (8) ◽  
pp. 1300-1307
Author(s):  
Zigong Chang ◽  
Haiyun Jiang ◽  
Ruomei Wu ◽  
Weili Zhang ◽  
Hui Zeng ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Response Time ◽  
Deposition Time ◽  
Electrochemical Polymerization ◽  
Process Condition ◽  
Optimal Process ◽  
Deposition Voltage ◽  
Uv Visible ◽  
Scanning Electron

The film of PEDOT was prepared in this study via electrochemical polymerization using EDOT as monomer in LiClO4/PC solution. The effects on the properties of the film were surveyed including the deposition voltage and deposition time. The morphology of the film was observed by scanning electron microscopy. The electrochromic kinetics was analyzed by combination of electrochemical workstation and UV-Visible spectrophotometer such as the transmittance, transmittance contrast, coloring efficiency and the response time. The results indicated the film presents a coral shape despites of the deposition voltage and the deposition time. In case of the application as electrochromic film, the optimal process condition is 1.3 V and 24 s. The corresponding transmittance is 82.77% in fade state. The transmittance contrast is 17.87%, and the coloring efficiency is about 117.92 cm2/C, the response time is 0.52 s.

Synthesis and Characterization of Gold Nanoparticles Synthesized in Gel and Paper by Electrolysis

2019 ◽  
Vol 824 ◽  
pp. 163-167
Author(s):  
Pema Dechen ◽  
Ekasith Somsook
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Gold Nanoparticles ◽  
Room Temperature ◽  
Synthesis And Characterization ◽  
Visible Spectroscopy ◽  
Gold Leaf ◽  
Uv Visible ◽  
Scanning Electron

In this report, synthesis and characterization of gold nanoparticles (AuNPs) from gold leaf by electrolysis in two different media (gel and paper) in presence of sodium chloride (NaCl), glucose (C6H12O6) and polyvinyl pyrrolidone (PVP) at room temperature were investigated. Graphite was used as two electrodes, NaCl was used as an electrolyte, C6H12O6 was used as reducing agent and PVP was used as stabilizer to control the aggregation of the nanoparticles. UV-Visible spectroscopy (UV-Vis) and scanning electron microscopy (SEM) were used to confirm the characteristics and morphologies of the synthesized AuNPs.

Comparison of Hydrogen Sulfide Sensing Properties between Multiple-Walled Carbon Nanotubes (MWNTs) and MWNTs-HAuCl4 Materials

2014 ◽  
Vol 936 ◽  
pp. 310-314
Author(s):  
Si Xuan He ◽  
Guang Zhong Xie ◽  
Ya Dong Jiang ◽  
Guang Di Zhang ◽  
Yong Zhou
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Hydrogen Sulfide ◽  
Response Time ◽  
Room Temperature ◽  
The Other ◽  
High Toxicity ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

The rapid and precise detection of hydrogen sulfide (H2S) has great significance due to its high toxicity. In this work, the response properties of multiple-walled carbon nanotubes (MWNTs) and MWNTs-HAuCl4 to H2S at room temperature were compared. Scanning electron microscopy (SEM) technique was used to characterize MWNTs and MWNTs-HAuCl4 films. It was found that sensors with MWNTs-HAuCl4 exhibited much higher response value. On the other hand, sensors with MWNTs were observed to have faster response time and better recovery properties.

Characterization of Synthesized SnO2 Nanoparticles and its Application for the Photo Catalytic Degradation of Eosin Y in Aqueous Solution

2021 ◽  
Vol 43 (1) ◽  
pp. 14-14
Author(s):  
Fazal Akbar Jan Fazal Akbar Jan ◽  
Muhammad Aamir Muhammad Aamir ◽  
Naimat Ullah and Husaain Gulab Naimat Ullah and Husaain Gulab
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Sno2 Nanoparticles ◽  
Catalytic Degradation ◽  
Eosin Y ◽  
X Rays ◽  
Visible Spectroscopy ◽  
Uv Visible ◽  
Scanning Electron

The synthesized oxide (SnO2) nanoparticles by sol-gel method were characterized using UV-Visible spectroscopy (UV-Vis), Fourier Transform Infrared spectroscopy (FTIR), X-rays diffraction(XRD) and Scanning electron microscopy(SEM). Using X-rays diffraction analysis different parameter were calculated such as crystallite size, d-spacing, dislocation density, number of unit cell, cell volume, morphological index, micro strain and instrumental broadening. The average particle size was 28.396 nm. Scanning electron microscopy revealed that SnO2 nanopartcles are uniformly distributed. Optical properties such as band gap (energy gap = 3.6 eV) was calculated from UV-Visible spectroscopy. The characterized particles were used as photocatalyst for the degradation of Eosin dye in aqueous solution under UV light. The effect of different parameters i.e irradiation time, initial dye concentration, pH of the medium and catalyst weight on percent degradation was also studied. Mmaximum dye degradation was found at 220 minutes time interval that was 92 % using 10 ppm solution. At pH 5 the degradation of dye was found to be 94%. The catalyst dose of 0.06 g was found to be the optimum weight for the best photo catalytic degradation of Eosin Y.

Formation and Electrical Interfacing of Nanocrystal-Molecule Nanostructures

2009 ◽  
Vol 1154 ◽  
Author(s):  
Claire Barrett ◽  
Gaëtan Lévêque ◽  
Hugh Doyle ◽  
Donocadh P Lydon ◽  
Gareth Redmond ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electrical Characterization ◽  
Directed Assembly ◽  
Optical Response ◽  
Histogram Analysis ◽  
Top Down ◽  
Uv Visible ◽  
Absorbance Data ◽  
Scanning Electron

AbstractThe formation of nanocrystal-molecule-nanocrystal nanostructures via controlled mixing of Au nanocrystals and bifunctional Re linkers is reported. UV-visible absorbance data, coupled with histogram analysis of nanostructures measured using Scanning Electron Microscopy has shown a characteristic optical response at wavelengths close to 600 nm following formation of dimer and trimer nanostructures. Directed assembly processes based on dielectrophoretic trapping have also been developed for electrical interfacing of these nanostructures between top-down nanoelectrode pairs for electrical characterization.

scholarly journals Manufacturing, Microstructure and Corrosion Resistance of Electrophoretically Deposited SiO2 and Ni/SiO2 Coatings On X2CrNiMo17–12–2 Steel

2016 ◽  
Vol 61 (2) ◽  
pp. 1221-1227
Author(s):  
T. Ratajski ◽  
I. Kalemba-Rec ◽  
B. Dubiel
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Corrosion Resistance ◽  
Cross Sections ◽  
Deposition Time ◽  
Plan View ◽  
Uniform Microstructure ◽  
Scanning Electron

Abstract The SiO2 and Ni/SiO2 coatings were electrophoretically deposited on X2CrNiMo17-12-2 steel using ethanol-based suspensions of the SiO2 and Ni powders. The influence of the zeta potential and concentration of the suspensions, the applied voltage and deposition time on the quality of the coatings was studied. Microstructure of the plan-view and cross sections of the coatings was investigated using scanning electron microscopy. The plan-view images revealed the uniform microstructure of the coatings with sporadically observed cracks, pores as well SiO2 and Ni agglomerates. On the cross-sections, the Cr2O3 layer, resulted from oxidation of the substrate during sintering of the coatings was observed. The polarization tests have shown that SiO2 and Ni/SiO2 coatings improve the corrosion resistance of the X2CrNiMo17-12-2 steel in 3.5% NaCl aqueous solution.

scholarly journals Electroless Deposition of Composite Nickel-Phosphorous Coatings with Diamond Dispersoid

2016 ◽  
Vol 61 (2) ◽  
pp. 493-498 ◽  
Author(s):  
M. Petrova ◽  
M. Georgieva ◽  
V. Chakarova ◽  
E. Dobreva
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Chemical Composition ◽  
Electroless Deposition ◽  
Deposition Time ◽  
Composite Coatings ◽  
Flexible Substrates ◽  
Optimal Conditions ◽  
Sem Images ◽  
Scanning Electron

AbstractThe composite Ni-P coating with diamond particles (D) deposited on the flexible substrates of pressed polyethylene terephthalate material (PET) was obtained, to be used in the development of efficient, flexible grinding and polishing tools. The optimal conditions of the hydrodynamic regime, deposition time and temperature were found. The influence of the concentration and size of the D particles (3/7 ÷ 225/300 μm) on the coating thickness and number of co-deposited particles were studied. By Scanning Electron Microscopy (SEM) images were defined the morphology of dispersion coatings and number of co-deposited particles in them, and Energy Dispersive Spectroscopy (EDS/INCA) was used to determine the elemental chemical composition of the composite coatings.

scholarly journals The Influence of the Deposition Parameters on the Properties of Ni-Cu Deposition

2019 ◽  
Vol 70 (1) ◽  
pp. 45-49
Author(s):  
Oana Claudia Ciobotea Barbu ◽  
Ioana Alina Ciobotaru ◽  
Florin Mihai Benga ◽  
Danut Ionel Vaireanu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Current Density ◽  
Deposition Time ◽  
Steel Substrate ◽  
Deposition Process ◽  
Deposition Parameters ◽  
Temperature Scanning ◽  
Scanning Electron

This paper discusses the properties of some Ni-Cu deposits obtained on a steel substrate, which may be employed as supercapacitor plates. In order to achieve plates with different properties, one has varied the parameters of the deposition process such as deposition time, current density and temperature. Scanning electron microscopy and dispersive energy spectrometry were employed for the determination of the structure and composition of the Ni-Cu deposits. The plates with the Ni-Cu deposits were used to create supercapacitors and their capacitance values were also determined.

Characterization of Synthesized SnO2 Nanoparticles and its Application for the Photo Catalytic Degradation of Eosin Y in Aqueous Solution

2021 ◽  
Vol 43 (1) ◽  
pp. 14-14
Author(s):  
Fazal Akbar Jan Fazal Akbar Jan ◽  
Muhammad Aamir Muhammad Aamir ◽  
Naimat Ullah and Husaain Gulab Naimat Ullah and Husaain Gulab
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Sno2 Nanoparticles ◽  
Catalytic Degradation ◽  
Eosin Y ◽  
X Rays ◽  
Visible Spectroscopy ◽  
Uv Visible ◽  
Scanning Electron

The synthesized oxide (SnO2) nanoparticles by sol-gel method were characterized using UV-Visible spectroscopy (UV-Vis), Fourier Transform Infrared spectroscopy (FTIR), X-rays diffraction(XRD) and Scanning electron microscopy(SEM). Using X-rays diffraction analysis different parameter were calculated such as crystallite size, d-spacing, dislocation density, number of unit cell, cell volume, morphological index, micro strain and instrumental broadening. The average particle size was 28.396 nm. Scanning electron microscopy revealed that SnO2 nanopartcles are uniformly distributed. Optical properties such as band gap (energy gap = 3.6 eV) was calculated from UV-Visible spectroscopy. The characterized particles were used as photocatalyst for the degradation of Eosin dye in aqueous solution under UV light. The effect of different parameters i.e irradiation time, initial dye concentration, pH of the medium and catalyst weight on percent degradation was also studied. Mmaximum dye degradation was found at 220 minutes time interval that was 92 % using 10 ppm solution. At pH 5 the degradation of dye was found to be 94%. The catalyst dose of 0.06 g was found to be the optimum weight for the best photo catalytic degradation of Eosin Y.

Development and Optimization of Biometal Nanoparticles by Using Mathematical Methodology: A Microbial Approach

2015 ◽  
Vol 30 ◽  
pp. 106-115 ◽  
Author(s):  
Soheila Honary ◽  
Hamed Barabadi ◽  
Pouneh Ebrahimi ◽  
Farzaneh Naghibi ◽  
Ahad Alizadeh
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Particle Size ◽  
Atomic Force Microscopy ◽  
Oxide Nanoparticles ◽  
Visible Spectroscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Uv Visible ◽  
Scanning Electron

This study aimed to biosynthesize and optimize the process of iron oxide nanoparticles producing by Penicilliumwaksmanii isolated from soil by employing mathematical methodology. The synthesized nanoparticles were formed with fairly well-defined dimensions with good monodispersity determined by SEM (Scanning Electron Microscopy), AFM (Atomic Force Microscopy), DLS (Dynamic Light Scattering), UV-Visible spectroscopy, zeta potential, polydispersity index (PDI) and correlogram of nanoparticles. The effects of different factors such as pH, temperature and concentration of FeCl3 on the particle size were investigated by Box-Behnken experimental design. The R2 value was calculated to be 0.9992 indicating the accuracy and ability of the polynomial model.

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