Article
Thermodynamics
Rashed Taleb Rasheed, Hadeel S. Mansoor, Thamer Adnan Abdullah, Tatjana Juzsakova, Noor Al-Jammal, Ali Dawood Salman, Rasha R. Al-Shaikhly, Phuoc Cuog Le, Endre Domokos, Thaer A. Abdulla
Summary: This study discusses an advanced colorimetric method to determine the catalase mimetic activity of V2O5 nanoparticles, showing an increase in activity with higher annealing temperature. Characterization techniques such as X-ray diffraction and scanning electron microscopy were used to study the structure and chemical nature of the nanoparticles. UV-visible spectroscopy and Fourier transform spectrometry were also employed for further characterization.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Engineering, Environmental
Xu Han, Chongchong Wu, Jilin Wang, Yue Zhang, Kailai Zhang, Ian D. Gates, Hui Li, Zi-Hang Huang, Tianyi Ma
Summary: This study addresses the commercial application issues of aqueous supercapacitors and proposes a strategy to improve their energy storage performance by synthesizing VOx materials with oxygen vacancy. The modular pouch device based on this materia demonstrated high-energy density and durability, making it a promising standby power supply for 3C products.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Materials Science, Ceramics
Eva Raudonyte-Svirbutaviciene, Laura Lukaviciute, Zdenek Moravec, Jiri Pinkas, Tomoyo Goto, Tohru Sekino, Aleksej Zarkov, Aivaras Kareiva
Summary: This study develops a hydrothermal synthesis method to produce calcium hydroxyapatite (HA) of controlled morphology without the use of organic additives. The influence of different ions on the hydrolysis and crystal growth of HA particles was investigated, revealing that the nature and concentration of the foreign ion as well as the synthesis conditions affected the phase purity and morphology of the final products. The findings suggest that Mn2+ had the highest inhibiting effect on the hydrolysis process of α-TCP while Sr2+ had the lowest effect. Plate-like particles showed more efficient adsorption of cationic dyes due to their higher surface area, while rod-like particles had a higher ratio of exposed planes, resulting in increased adsorption of cationic dyes.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Fatemeh Hasannezhad, Leila Naji, Majid Arvand
Summary: Vanadium pentoxide nanostructures were grown on ITO-coated glass slides using different electrochemical methods and applied as the hole transport layer in bulk heterojunction polymer solar cells. Through simple adjustment of growth conditions, samples with excellent electrical, optical, and electrochemical characteristics were obtained, leading to improved performance of the solar cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Jiajia Song, Lingjiang Kou, Yong Wang, Yong Pang, Taotao Ai, Koji Kajiyoshi, Mengting Liu, Weiwei Bao, Wenhu Li, Panya Wattanapaphawong
Summary: In this study, Fe-doped (NH4)2V12O27·xH2O was synthesized using solvothermal method which greatly enhanced material's electrochemical performance. The resulting product showed remarkably high capacity of 165 mA h g-1 at 50 mA g-1 and ultrahigh stability with 74.2% retention over 1000 cycles at 1 A g-1. This improvement is attributed to increased intrinsic conductivity from Fe doping which promotes absorption and release kinetics of Zn2+ and prevents gradual dissolution of V-O layer.
REACTION CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Adela Hankova, Tereza Kosutova, Jan Hanus, Anna Kuzminova, Pavel Pleskunov, Michaela Cervena, Petr Zeman, Natalia Khomiakova, Frantisek Hajek, Ondrej Kylian
Summary: The temperature-driven genesis of morphology and structure of vanadium nanoparticle films fabricated by magnetron-based gas aggregation sources was investigated. Three temperature regions were identified, each with distinct changes in the oxidation, mass, crystallinity, morphology, and optical properties of the vanadium nanoparticles. The heating process resulted in the formation of rod-like structures and a decrease in specific surface area of the coatings, as well as a shift in the optical band gap.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Patrick Taylor, Matthew Kusper, Tina Hesabizadeh, Luke D. Geoffrion, Fumiya Watanabe, Etienne Herth, Gregory Guisbiers
Summary: This study successfully synthesized naked vanadium pentoxide nanostructures using liquid-phase pulsed laser ablation, achieving a production rate of approximately 10 ppm per minute. The characterization of the alpha-V2O5 and beta-V2O5 nanostructures revealed that the beta-phase displays surface energy close to platinum, with exciton Bohr radii of 3.5 +/- 0.7 nm and 2.0 +/- 0.6 nm for alpha-V2O5 and beta-V2O5 phases, respectively.
NANOSCALE ADVANCES
(2021)
Article
Environmental Sciences
Nishant Beriwal, Anil Verma
Summary: This study developed a method to use vanadium pentoxide as an inexpensive replacement to vanadium sulfate in synthesizing vanadium redox flow battery (VRFB) electrolytes. By adjusting the sulfuric acid concentration based on standard synthesis mechanisms, the electrolyte with similar performance to vanadium sulfate was successfully synthesized, and it costs only one-fifth of vanadium sulfate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Catia L. Ucker, Fabio C. Riemke, Nivaldo F. de Andrade Neto, Anderson de A. G. Santiago, Tatiane J. Siebeneichler, Neftali L. V. Carreno, Mario L. Moreira, Cristiane W. Raubach, Sergio Cava
Summary: This study demonstrated the use of crystalline Nb2O5 powders with different phases as photocatalysts for Rhodamine B degradation, showing that changes in crystalline structure and surface area due to heat treatment temperature can impact the photocatalytic activity. Different phases of Nb2O5 resulted in varying degrees of RhB degradation, with pseudohexagonal Nb2O5 achieving a higher degradation rate compared to orthorhombic Nb2O5. Analysis methods including high-performance liquid chromatography, mass spectrometry, and total organic content analysis were used to identify RhB degradation products and propose potential degradation pathways.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Guang Su, Shufeng Chen, Huilong Dong, Yafei Cheng, Quan Liu, Huaixin Wei, Edison Huixiang Ang, Hongbo Geng, Cheng Chao Li
Summary: By doping K+ into V2O5, this study promotes the diffusion of Zn2+ and enhances the structural stability of the battery; K0.5V2O5 demonstrates excellent electrochemical performance at high rates, long-term cycling, and low temperatures, showing great potential for high-performance cathodes in aqueous ZIBs.
Article
Engineering, Environmental
Weifang Zhang, Hongbo Lu, Feng Liu, Chunli Wang, Zhihao Zhang, Jing Zhang
Summary: A novel hydrothermal treatment method with Fe(NO3)(3) was developed to detoxify arsenic sulfide slag (ASS) by transforming arsenic into scorodite and extracting sulfur in one step. The process significantly reduced the leachability of arsenic-containing solid waste and increased the stability of the arsenic contained solid product.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Giovanni Marini, Matteo Calandra
Summary: This paper identifies the criteria for observing ultrafast magnetization and discusses the challenges in experimental detection. Based on simulations, the study demonstrates the induction of a transient ferrimagnetic state in nonmagnetic semiconductor V2O5 using ultrafast pulses. The methodology is important for computationally screening ultrafast magnetism in nonmagnetic semiconductors.
Article
Chemistry, Physical
Xinlin Huang, Xinlong Li, Yuanzhi Chen, Jie Mei, Wanjie Xu, Laisen Wang, Dong-Liang Peng
Summary: The presence of oxygen vacancies has positive effects on the electrochemical properties of V2O5 nanocrystals, leading to higher initial discharge capacity, excellent rate capability, and cycling stability. A simple way to improve the rate capability and cycling stability of V2O5 nanocrystals for high-performance LIB applications is through the combination of nanoscale dimensions and oxygen vacancies.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Jiayan Lang, Xiaojing Ma, Sophie S. Liu, Danielle L. Streever, Max D. Serota, Trevor Franklin, Ellis R. Loew, Rong Yang
Summary: Otitis media is a common reason for pediatric antibiotic prescriptions. The current treatment faces challenges such as antibiotic resistance and difficulty in drug administration. A novel local treatment method was developed, which converted a metabolic product of the pathogen into a potent antiseptic. This method showed promising results in animal experiments.
Article
Engineering, Electrical & Electronic
Jincheng Mei, Yi Li, Junyi Yan, Jiaqing Zhuang, Xingping Wang, Xin Zhang, Yuda Wu, Mengdi Zou, Chuang Peng, Wenyan Dai, Zhen Yuan, Ke Lin
Summary: The optoelectronic and structural properties of the n-V2O5/p-GaAs heterojunction were investigated, and it was found that the device performance is closely related to the annealing temperature and annealing time during the film preparation. The volt-ampere characteristic curves of the junction were thoroughly investigated under different temperature and illumination conditions. The responsivity of the n-V2O5/p-GaAs heterojunction was 0.00517 A/W at 1550 nm, with detectivity values of 1.15 x 10(7) Jones and 4.75 x 10(8) Jones at 0 and 3 V bias, respectively. These results are significant for the exploration and improvement of near-infrared optoelectronic devices based on V2O5.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Analytical
Priscila Fernanda Pereira Barbosa, Valmor Roberto Mastelaro, Eduardo Guimaraes Vieira, Devaney Ribeiro do Carmo
Summary: A synthesis method for the functionalization of beta-cyclodextrin (beta-Cd) with polyamide dendrimer PAMAM G.0 and the formation of a mixed-valence complex (beta-Cd-PAMAM-Ag/Fe) with silver and potassium hexacyanoferrate (III) was proposed. The material was characterized using SEM, FTIR, XRD, EDS, and EPR. The electrochemical behavior of the hybrid complex was investigated, and optimal analytical responses were obtained by evaluating various parameters. The beta-Cd-PAMAM-Ag/Fe material showed successful application in the electrocatalytic oxidation of dopamine using CV and SWV.
Article
Chemistry, Physical
Juliana. A. A. Torres, Andre E. Nogueira, Gelson T. S. T. da Silva, Caue Ribeiro
Summary: The influence of heat treatment and decoration of SnO2 with gold nanoparticles on CO2 photoreduction process was analyzed. Both treatments had a deleterious effect on the reactions, with a significant drop in methane production under UV radiation. However, under visible radiation, the decorated SnO2 showed plasmonic resonance and produced methane with small amounts of carbon monoxide. These results demonstrate that the surface characteristics of SnO2 are responsible for its catalytic activity, despite its unfavorable band structure for CO2 reduction.
Article
Chemistry, Physical
Laura O. Libero, Lara K. Ribeiro, Luis I. Granone, Maria S. Churio, Josiane C. Souza, Valmor R. Mastelaro, Juan Andres, Elson Longo, Lucia H. Mascaro, Marcelo Assis
Summary: This study reports on the immobilization of Fe-2(MoO4)(3) in chitosan films and its effect on the oxidation reaction of sulfide derivatives. The catalyst showed good yields and excellent selectivity, even tolerating oxidatively sensitive functional groups. The key success of the selective oxidation was attributed to the presence of hydroxyl radical, center dot OH, and the Fe3+/Fe2+ Fenton-like process. Additionally, the synergistic effect between Fe-2(MoO4)(3) and chitosan was demonstrated in the selective oxidation of sulfides to sulfones. This work provides a design strategy for efficient catalysts that can be applied to other semiconductors and oxidation processes.
Article
Environmental Sciences
Bruno Ramos, Wesley F. Vaz, Luan F. Diniz, Flavio O. Sanches Neto, Julio C. O. Ribeiro, Valter H. Carvalho-Silva, Antonio Carlos S. C. Teixeira, Caue Ribeiro, Hamilton B. Napolitano, Paulo S. Carvalho Jr
Summary: The excessive use of pesticides and the demand for environmentally friendly compounds have driven detailed studies on the environmental fate of these compounds. In this study, the mechanism of acid hydrolysis of the herbicide ametryn (AMT) was investigated, and the toxicities of its metabolites were predicted through experimental and theoretical approaches. The hydrolysis of AMT under acidic conditions resulted in the formation of hydroxyatrazine (HA) as the main product. The tautomerization reactions favored the conversion of AMT to HA. The kinetics of the reaction revealed that the dissociation of CH3SH was the rate-controlling step in the degradation process, leading to a half-life of 7 to 24 months under typical acid soil conditions.
Article
Environmental Sciences
Natalia Gabriele Camparotto, Tauany de Figueiredo Neves, Valmor Roberto Mastelaro, Patricia Prediger
Summary: In this study, highly hydrophobic chitosan beads were prepared as adsorbents for removing organic contaminants from water. The chitosan beads exhibited high porosity, large pore space, and excellent hydrophobicity. The beads showed efficient adsorption capacities for sildenafil citrate, basic blue 26 dye, and cetylpyridinium chloride, and were also effective in fixed-bed experiments.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Inorganic & Nuclear
H. Moreno, G. L. Domingues, M. Assis, P. P. Ortega, V. R. . Mastelaro, M. A. . Ramirez, A. . Z. Simoes
Summary: This study investigates the morphology and photocatalytic properties of CeO2 nanocrystals synthesized using microwave-assisted solvothermal method with acetone and ethanol as solvents. The results show that CeO2 synthesized in acetone has more emission peaks in the blue region, possibly due to higher Ce3+ concentration, while CeO2 synthesized in ethanol exhibits a strong orange-red emission, suggesting the presence of oxygen vacancies. CeO2 synthesized in acetone demonstrates superior photocatalytic response compared to that synthesized in ethanol, possibly due to increased disorder in the CeO2 structure, leading to enhanced light absorption.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Jose D. C. Geovo, Juliana A. Torres, Amanda S. Giroto, Fernanda C. N. Rocha, Marilia M. Garcia, Gelson T. S. T. Silva, Joelma R. C. Souza, Jessica A. de Oliveira, Caue Ribeiro, Andre E. Nogueira
Summary: The conversion of CO2 into valuable chemical feedstock through photocatalysis is considered an effective strategy to mitigate global warming and energy supply problems. In this study, mesoporous composite materials based on MCM-41 and CuO were synthesized and their photocatalytic activity in the reduction of CO2 was evaluated. The results showed that MCM-41 and the composite MCM-41/CuO have significant potential for use in the CO2 photoreduction process, with high selectivity and production of methanol.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Plant Sciences
Vinicius F. Majaron, Marisa G. da Silva, Marcela Pfeifer, Ricardo Bortoletto-Santos, Camila C. V. Velloso, Rodrigo Klaic, Wagner L. Polito, Sidney J. L. Ribeiro, Alberto C. C. Bernardi, Cristiane S. Farinas, Caue Ribeiro
Summary: Urea is the main nitrogen source in agriculture, but it leads to significant losses and greenhouse gas emissions. This study developed a double-coating system for urea granules, combining controlled release and microorganisms, to reduce nitrogen losses and improve plant productivity. The results showed a reduction in N2O and NH3 emissions, as well as increased nitrogen use efficiency, plant growth, and nitrogen uptake. The findings support the use of coating technologies to synchronize nutrient release with plant needs and reduce environmental impacts.
JOURNAL OF SOIL SCIENCE AND PLANT NUTRITION
(2023)
Article
Chemistry, Physical
Marcela Pfeifer, Ricardo Bortoletto-Santos, Flavio A. C. Andrade, Sidney J. L. Ribeiro, Fauze A. Aouada, Caue Ribeiro
Summary: Improper disposal of metal-containing wastes harms the environment and human health. This study investigates the sorption and desorption of Cr6+, Cu2+, and Mn2+ by modifying polyacrylamide/methylcellulose hydrogels with bentonite or hydrotalcite. The nanocomposite produced by calcining hydrotalcite at 550 degrees C exhibits the best retention properties.
APPLIED CLAY SCIENCE
(2023)
Article
Chemistry, Physical
Francielle Candian Firmino Marcos, Maria Jose Fonseca Costa, Gabriel L. Catuzo, Daniel Angeli de Moraes, Marcos de Oliveira Jr, Valmor Roberto Mastelaro, Jose Mansur Assaf, Reinaldo Giudici, Elisabete Morreira Assaf
Summary: xCu/MOF catalysts were synthesized by impregnation of copper precursor on UiO-66 support and characterized using various techniques. The 20Cu/MOF catalyst, with the highest copper loading, exhibited the best methanol formation rate and CO2 conversion due to the strong metal-support interaction and the highest amount of missing linker defects in the MOF structure.
JOURNAL OF CATALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Gelson T. S. T. da Silva, Osmando F. Lopes, Ariadne C. Catto, Antonio Otavio T. Patrocinio, Alexandre Mesquita, Caue Ribeiro, Waldir Avansi Jr, Luis F. da Silva
Summary: In this study, the influence of hydrothermal treatment temperature on the structures of SnO2 nanoparticles as photocatalysts and photoanodes was investigated. The results showed that the structural order of SnO2 NPs increased with the hydrothermal temperature. The hydrothermal treatment also increased the amount of hydroxyl groups on the SnO2 NPs surface. The photocatalytic activity of the NPs was affected by the hydrothermal treatment temperature, with crystallinity and surface hydroxyl groups playing a significant role.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Raul L. Ferreira, Walter Muniz Jr, Louise E. A. Souza, Hector M. C. Navarro, Lucas R. de Mello, Valmor R. Mastelaro, Tasso O. Sales, Cintya D. A. E. S. Barbosa, Adriana S. Ribeiro, Emerson R. da Silva, Melissa F. Landell, Italo N. de Oliveira
Summary: This study investigates the physicochemical and antimicrobial properties of carbon dots derived from the methyl red azo dye. The results show that these carbon dots exhibit low cytotoxicity and tunable photoluminescence, and can generate reactive oxygen species (ROS) with a high singlet oxygen quantum efficiency. They also demonstrate strong antimicrobial activity against healthcare-relevant pathogens.
ACS APPLIED BIO MATERIALS
(2023)
Article
Engineering, Environmental
Roger Borges, Lilian Fernanda Martins do Amaral, Thalita Jessika Bondancia, Rilton Alves de Freitas, Fernando Wypych, Caue Ribeiro
Summary: Cellulose acetate can be recovered and reused through mechanochemical activation and treatment with citric acid and H2O2. Ca(OH)2 can hydrolyze acetate groups, while CaCO3 can reduce particle size while keeping the acetate functional groups. The resulting cellulose nanoparticles can be used in Pickering emulsions with slight differences in droplet sizes.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Ricardo Marques e Silva, Fernanda de Lourdes Souza, Eduardo Dias, Gelson Tiago dos Santos Tavares da Silva, Florymar Escalona Duran, Arjun Rego, Drew Higgins, Caue Ribeiro
Summary: Partial oxidation of methane into hydrocarbons using photoelectrochemical routes is attractive for sustainable development. The use of semiconductor heterostructures can improve charge separation and enhance the efficiency of methane activation and oxidation. In this study, TiO2:SnO2 heterojunction catalysts exhibited superior performance in methane oxidation due to the formation of heterostructure type II, which facilitates the separation of electron-hole pairs and promotes the generation of reactive oxygens.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Guilherme K. Maron, Mateus G. Masteghin, Veridiana Gehrke, Lucas S. Rodrigues, Jose H. Alano, Jessica H. H. Rossato, Valmor Roberto Mastelaro, Jairton Dupont, Marcia Tsuyama Escote, S. Ravi P. Silva, Neftali Lenin Villarreal Carreno
Summary: This study demonstrates an enhanced fabrication technique using CO2 infrared lasers to pattern micro-supercapacitor electrodes. The direct-written laser-induced graphene (LIG) micro-supercapacitors with NiCo2S4 nanoparticles exhibited outstanding properties, including high specific capacitance and energy density, as well as excellent capacitance retention and flexibility. These findings suggest the potential use of LIG/NiCo2S4 MSC in the next generation of flexible and miniaturized portable devices.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Crystallography
Jianzheng Hu, Long Yan, Ning Zhou, Yao Chen, Xiaoni Yang, Lianqiao Yang, Shiping Guo
Summary: The effect and mechanism of carrier gas velocity, V/III ratio, and carrier gas velocity match on the growth rate of AlN were investigated in this study. The results showed that the growth rate of AlN initially increased with hydrogen flow rate, reached saturation, and then decreased monotonically. The turning point value depended on the equipment and process. By increasing the MO VM, the growth rate of AlN could be improved, but the uniformity deteriorated due to turbulence and loss of uniform boundary layer. High quality AlN films were successfully grown on nano-patterned sapphire substrates with improved crystalline quality and atomic smooth surfaces.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Tingting Ma, Yang Li, Kangning Sun, Qinglin Cheng, Sen Li
Summary: This study investigates the melting process and nucleation behavior of sodium crystals using molecular dynamics simulation. The results show good agreement between simulated and experimental values for the melting temperature, density, and radial distribution function of sodium. The diffusion coefficient of liquid sodium increases linearly with temperature, and the homogeneous nucleation rate of melting in superheated sodium crystal exponentially increases with temperature. The findings provide theoretical support for applications involving heat and mass transfer in sodium-related systems.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Hisato Nishii, Shintarou Iida, Akira Yamasaki, Takumi Ikenoue, Masao Miyake, Toshiya Doi, Tetsuji Hirato
Summary: Epitaxial V2O3 films were fabricated on sapphire substrates using mist chemical vapor deposition (mist CVD) method, eliminating the need for high vacuum conditions. The films can be grown on sapphire substrates even under atmospheric pressure, with the optimal growth temperature at 823 K. The films grown at 823 K exhibit a metal-insulator transition at approximately 155 K. The film on C-plane sapphire exhibits a lower transition temperature compared to those on R- and A-plane sapphire substrates.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Jani Jesenovec, Kevin Zawilski, Peter Alison, Stephan J. Meschter, Sambit K. Saha, Andrew J. Sepelak, Peter G. Schunemann
Summary: In this study, NiSb needles were successfully formed in InSb by manipulating the growth rate and adding NiSb. These needle structures in InSb can be used to tune the magnetoresistance of devices. Additionally, undoped InSb crystals demonstrated good infrared transmission at low growth rates.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
D. Joseph Daniel, P. Karuppasamy, H. J. Kim
Summary: The 2-amino 4-methyl pyridinium oxalate (2A4MPO) compound was synthesized and its crystal structure, functional groups, thermal stability, electrical properties, and third-order nonlinear optical properties were studied. The results demonstrate that the synthesized crystal has good structural integrity, thermal stability, and potential for third-order nonlinear optical applications.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
C. W. Lan
Summary: The past two decades have witnessed a significant transformation in solar silicon crystal growth, especially in the competition between multi-crystalline silicon (Multi-Si) and mono-crystalline silicon (Mono-Si). The demand for this crucial material has exponentially surged, with silicon solar panels capturing over 95% of the global PV market share. The advancements in crystal growth technology during this period have set historical benchmarks, with the market share shifting from high-performance multi-crystalline silicon (HPM-Si) to CZ silicon.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Peiyao Hao, Lili Zheng, Hui Zhang
Summary: A novel design of argon gas tube for removing impurities during silicon ingot growth was developed, and numerical simulations showed that it can effectively extract SiO.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Geetika Sahu, Chanchal Chakraborty, Subhadeep Roy, Souri Banerjee
Summary: This article discusses the novel fractal nature of hydrothermally synthesized MoS2 QDs. By adjusting the reaction time, the study found that the average size of QDs increases and then decreases with longer reaction times. STEM images indicate that shorter reaction times lead to sheet formation, while extended reaction times cause sheets to fragment into QDs.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Pengjian Lu, Wei Huang, Junjun Wang, Haitao Yang, Shiyue Guo, Bin Li, Ting Wang, Chitengfei Zhang, Rong Tu, Song Zhang
Summary: A systematic study on the tetramethylsilane-hydorgen (TMS-H-2) system for the deposition of pure single-crystal SiC by high-temperature chemical vapor deposition (HTCVD) method is conducted. The study investigates the effect of temperature, pressure, and H-2:TMS ratio on the deposition conditions and provides a theoretical basis and guidance for improving the quality and cost of industrial production of single-crystal SiC.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Xinyu Jiang, Liangliang Liu, Yanqing Liu, Yan Wang, Zhaoping Hou
Summary: Investigation on the preparation of anisometric templated textured high entropy or multi-element doped ferroelectric ceramics was conducted using A-site disordered niobate microcrystals. The effects of process parameters on the morphology and chemical composition were studied, and the photocatalytic properties of the microcrystals were evaluated.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Mobashsara Tabassum, Md. Ashraful Alam, Sabrina Mostofa, Raton Kumar Bishwas, Debasish Sarkar, Shirin Akter Jahan
Summary: In this study, high crystallinity copper nanoparticles were synthesized by altering the reaction medium at low temperatures. The results show that changing the reaction medium can reduce the surface energy of precursors and promote the formation of highly crystalline copper nanoparticles.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Ivan Bodnar, Vitaly V. Khoroshko, Veronika A. Yashchuk, Valery F. Gremenok, Mohsin Kazi, Mayeen U. Khandaker, Tatiana I. Zubar, Daria I. Tishkevich, Alex Trukhanov, Sergei Trukhanov
Summary: This work presents the production of single crystals of Cu2ZnGeSe4, a semiconducting quaternary compound, using a gas chemical method with iodine as a transporter. The phase state, crystal structure, and lattice constants of the synthesized samples were refined and determined. The band gap of Cu2ZnGeSe4 was calculated using transmission spectrum and it was found that the band gap increases by 12% with decreasing temperature in the range of 20-300 K.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Timur Malin, Igor Osinnykh, Vladimir Mansurov, Dmitriy Protasov, Sergey Ponomarev, Denis Milakhin, Konstantin Zhuravlev
Summary: The effect of growth temperature on the buffer leakage currents of GaN-on-Si layers was investigated. It was found that higher growth temperature results in lower leakage currents. The defects in GaN layers grown at different temperatures were studied using photoluminescence technique, and a correlation between leakage currents, structural perfection, and donor concentration in GaN-on-Si layers was established. It was also observed that reduced growth temperature leads to the formation of inversion domains.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Thi-Hoai-Thu Nguyen, Jyh-Chen Chen
Summary: The effect of heater power control on heat, flow, and oxygen transport for CCz crystal growth was studied. Shorter upper side heater design could improve crystal quality and growth, but with higher power consumption.
JOURNAL OF CRYSTAL GROWTH
(2024)
Article
Crystallography
Peter Rudolph
Summary: This article presents an overview of selected contributions to the development of crystal growth technology by the Laudise Prize awardee 2023. It discusses various aspects such as shaped crystal growth, the correlation between melt structure and crystal quality, control of intrinsic defects and inclusions, prevention of dislocation cell patterns, and melt growth experiments under a travelling magnetic field.
JOURNAL OF CRYSTAL GROWTH
(2024)
