Growth of different V2O5 nanostructures as a function of deposition duration

2018 ◽  
Author(s):  
Sujit K. Saini ◽  
Rabindar K. Sharma ◽  
Megha Singh ◽  
Prabhat Kumar ◽  
G. B. Reddy
Keyword(s):  
Deposition Duration

scholarly journals Early-Stage Growth Mechanism and Synthesis Conditions-Dependent Morphology of Nanocrystalline Bi Films Electrodeposited from Perchlorate Electrolyte

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1245 ◽  
Author(s):  
Daria Tishkevich ◽  
Sergey Grabchikov ◽  
Tatiana Zubar ◽  
Denis Vasin ◽  
Sergei Trukhanov ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Early Stage ◽  
Abnormal Behavior ◽  
Morphological Properties ◽  
Synthesis Conditions ◽  
Force Microscopy ◽  
Atomic Force ◽  
Galvanostatic Regime ◽  
Current Densities ◽  
Deposition Duration

Bi nanocrystalline films were formed from perchlorate electrolyte (PE) on Cu substrate via electrochemical deposition with different duration and current densities. The microstructural, morphological properties, and elemental composition were studied using scanning electron microscopy (SEM), atomic force microscopy (AFM), and energy-dispersive X-ray microanalysis (EDX). The optimal range of current densities for Bi electrodeposition in PE using polarization measurements was demonstrated. For the first time, it was shown and explained why, with a deposition duration of 1 s, co-deposition of Pb and Bi occurs. The correlation between synthesis conditions and chemical composition and microstructure for Bi films was discussed. The analysis of the microstructure evolution revealed the changing mechanism of the films’ growth from pillar-like (for Pb-rich phase) to layered granular form (for Bi) with deposition duration rising. This abnormal behavior is explained by the appearance of a strong Bi growth texture and coalescence effects. The investigations of porosity showed that Bi films have a closely-packed microstructure. The main stages and the growth mechanism of Bi films in the galvanostatic regime in PE with a deposition duration of 1–30 s are proposed.

scholarly journals Effects of electrodeposition time on a manganese dioxide supercapacitor

RSC Advances ◽  
2020 ◽  
Vol 10 (27) ◽  
pp. 15860-15869 ◽  
Author(s):  
Xiaoli Dai ◽  
Ming Zhang ◽  
Jitao Li ◽  
Dingyu Yang
Keyword(s):  
Manganese Dioxide ◽  
Specific Capacitance ◽  
Electrodeposition Time ◽  
Deposition Duration

As is well known that the specific capacitance of supercapacitors cannot be improved by increasing the mass of the deposited MnO2 films, which means an appropriate deposition duration is important.

Effective role of deposition duration on the growth of V2O5 nanostructured thin films

2016 ◽  
Author(s):  
Rabindar Kumar Sharma ◽  
Sujit Kumar Saini ◽  
Megha Singh ◽  
G. B. Reddy
Keyword(s):  
Thin Films ◽  
Nanostructured Thin Films ◽  
Effective Role ◽  
Deposition Duration

scholarly journals Cuticle deposition duration in the uterus is correlated with eggshell cuticle quality in White Leghorn laying hens

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xia Chen ◽  
Zhaoxiang He ◽  
Xingzheng Li ◽  
Jianlou Song ◽  
Mingyi Huang ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Genetic Regulation ◽  
Reproductive Hormones ◽  
Poultry Production ◽  
White Leghorn ◽  
Factors Affecting ◽  
Qpcr Analysis ◽  
Deposition Duration ◽  
Major Factors

AbstractThe cuticle formed in the uterus is the outermost layer as the first defense line of eggshell against microbial invasions in most avian species, and analyzing its genetic regulation and influencing factors are of great importance to egg biosecurity in poultry production worldwide. The current study compared the uterine transcriptome and proteome of laying hens producing eggs with good and poor cuticle quality (GC and PC, the top and tail of the cuticle quality distribution), and identified several genes involved with eggshell cuticle quality (ESCQ). Overall, transcriptomic analysis identified 53 differentially expressed genes (DEGs) between PC versus GC group hens, among which 25 were up-regulated and 28 were down-regulated. No differences were found in the uterine proteome. Several DEGs, including PTGDS, PLCG2, ADM and PRLR related to uterine functions and reproductive hormones, were validated by qPCR analysis. Egg quality measurements between GC and PC hens showed GC hens had longer laying interval between two consecutive ovipositions (25.64 ± 1.23 vs 24.94 ± 1.12 h) and thicker eggshell thickness (352.01 ± 23.04 vs 316.20 ± 30.58 μm) (P < 0.05). Apart from eggshell traits, other egg quality traits didn’t differ. The result demonstrated eggshell and cuticle deposition duration in the uterus is one of the major factors affecting ESCQ in laying hens. PTGDS, PLCG2, ADM and PRLR genes were discovered and might play crucial roles in cuticle deposition by regulating the uterine muscular activities and secretion function. The findings in the present study provide new insights into the genetic regulation of cuticle deposition in laying hens and establish a foundation for further investigations.

Effects of Process Parameters on Morphologies and Microstructures of Laser Melting Deposited V-5Cr-5Ti Alloys

2018 ◽  
Vol 913 ◽  
pp. 227-234
Author(s):  
Lin Rui Bai ◽  
Guo Min Le ◽  
Jin Feng Li ◽  
Xue Liu ◽  
Xiu Yan Li
Keyword(s):  
Deposition Process ◽  
Fiber Texture ◽  
Thin Wall ◽  
Laser Melting ◽  
Thin Walls ◽  
Nuclear Systems ◽  
Columnar Grains ◽  
Deposition Duration ◽  
Scanning Strategies ◽  
Equiaxed Grains

V-Cr-Ti alloys are promising structural materials for future nuclear systems. In this study, a laser melting deposition process has been applied to the fabrications of V-5Cr-5Ti alloys. Laser powers of 1200W, 1400W and 1600W, scanning speeds of 400 mm/min and 600 mm/min, and scanning strategies of single directional scanning and dual directional scanning have been applied to investigate the effects on the morphologies and microstructures of formed individual deposits and thin walls. The dual directional scanning is favored for fabricating thin walls with regular shape, comparing to the single directional scanning. Microstructures of the deposits and walls consist of columnar grains and equiaxed grains. Due to the effects on temperature gradients, both the laser powers and deposition duration show significant effects on the microstructural evolutions of the thin wall samples. As the laser power and deposition duration increase, columnar to equiaxed transitions have been observed. The regions containing columnar grains and equiaxed grains have a <100> fiber texture and a random texture, respectively.

scholarly journals Preparation and Characterization of Self-Assembled Manganese Dioxide Thin Films

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Suh Cem Pang ◽  
Suk Fun Chin ◽  
Chian Ye Ling
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Manganese Dioxide ◽  
Self Assembly ◽  
Electrode Materials ◽  
Thin Film Deposition ◽  
Deposition Process ◽  
Film Deposition ◽  
Deposition Duration ◽  
Self Assembled

Thin films of manganese dioxide (MnO2) were prepared by self-assembly of MnO2nanoparticles directly unto nickel-coated poly(ethylene terephthalate) flexible films using the newly developed horizontal submersion process. The thickness of deposited thin films was controllable by the deposition duration. This horizontal submersion deposition process for thin-film deposition is relatively easy, simple, and cost effective. Effects of deposition duration and calcination temperatures on the microstructure and electrochemical properties of self-assembled MnO2thin films were investigated. Optimized MnO2thin films exhibited high charge capacity, good cycling reversibility, and stability in a mild aqueous electrolyte and are thus promising electrode materials for the fabrication of thin-film electrochemical capacitors.

Cuticle Deposition Duration In The Uterus Is One Of The Major Factors Affecting Eggshell Cuticle Quality In White Leghorn Laying Hens

2021 ◽  
Author(s):  
Xia Chen ◽  
Zhaoxiang He ◽  
Xingzheng Li ◽  
Jianlou Song ◽  
Mingyi Huang ◽  
...  
Keyword(s):  
Laying Hens ◽  
Egg Quality ◽  
Activity Rhythm ◽  
Expression Patterns ◽  
Genetic Regulation ◽  
Reproductive Hormones ◽  
Poultry Production ◽  
Factors Affecting ◽  
Deposition Duration ◽  
Major Factors

Abstract Background: The cuticle formed in the uterus is the outermost layer as the first defense line of eggshell against microbial invasions in most avian species, and analyzing its genetic regulation and influencing factors are of great importance to egg biosecurity in poultry production worldwide. The current study compared the uterine transcriptome and proteome of laying hens producing eggs with good and poor cuticle quality (GC and PC, the top and tail of the cuticle quality distribution), and identified several genes involved with eggshell cuticle quality (ESCQ).Results: Overall, transcriptomic analysis identified 53 differentially expressed genes (DEGs) between PC vs GC group hens, among which 25 were up-regulated and 28 were down-regulated. No differences were found in the uterine proteome. Several DEGs, including PTGDS, PLCG2, ADM and PRLR related to uterine functions and reproductive hormones, were validated by qPCR analysis. Egg quality measurements between GC and PC hens showed GC hens had longer laying interval between two consecutive ovipositions (25.64 ± 1.23 vs 24.94 ± 1.12 h) and thicker eggshell thickness (352.01 ± 23.04 vs 316.20 ± 30.58 μm) (P < 0.05). Apart from eggshell traits, other egg quality traits didn’t differ. The results above suggested the expression patterns of PTGDS, PLCG2, ADM and PRLR genes in the uterus regulated the muscular activity rhythm and secretion function, which ensured the eggshell and cuticle deposition duration, and lead to the good ESCQ of the GC hens.Conclusions：The present study demonstrated eggshell and cuticle deposition duration in the uterus is one of the major factors affecting ESCQ in laying hens. PTGDS, PLCG2, ADM and PRLR genes were discovered and might play crucial roles in cuticle deposition by regulating the uterine muscular activities and secretion function. The findings in the present study provide new insights into the genetic regulation of cuticle deposition in laying hens and establish a foundation for further investigations.

scholarly journals Electrodeposition of ZnO/Cu2O Heterojunctions on Ni-Mo-P Electroless Coating

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 935
Author(s):  
Nelly Maria Rosas-Laverde ◽  
Alina Iuliana Pruna ◽  
Jesus Cembrero ◽  
David Busquets-Mataix
Keyword(s):  
Electrical Conductivity ◽  
Grain Size ◽  
Annealing Treatment ◽  
Applied Potential ◽  
Ceramic Tiles ◽  
Cathodic Potential ◽  
Electroless Coating ◽  
Prolonged Annealing ◽  
Deposition Duration ◽  
Electroless Ni

Electroless Ni-Mo-P coatings were deposited onto ceramic tiles in order to be employed as electrodes for the electrodeposition of ZnO and Cu2O heterojunction layers. Varying conditions, such as duration, annealing of the electroless coating and applied potential, and duration for ZnO electrodeposition were studied in order to optimize the properties of the ZnO/Cu2O heterojunctions toward improved photoelectrical performance. The coatings were evaluated in terms of morphology, crystalline structure, and by electrochemical and photoelectrical means. The obtained results indicated that a prolonged annealing treatment at low temperature is beneficial to improve the roughness and electrical conductivity of the Ni-Mo-P coating to further enhance the electrodeposition of ZnO. The morphology analysis revealed continuous and homogeneous Ni-Mo-P coatings. The formation of cube-like Cu2O crystals with larger grain size was induced by increasing the deposition duration of ZnO. The properties of ZnO layer are much improved when a higher cathodic potential is applied (−0.8 V) for 1 h, resulting in optimum photoelectric parameters as 1.44 mA·cm−2 for the JSC and 760.23 µV for the VOC value, respectively, for the corresponding heterojunction solar cell.

Sign in / Sign up

Export Citation Format

Share Document