Article
Chemistry, Multidisciplinary
Xue Bai, Finn Purcell-Milton, Yurii K. Gun'ko
Summary: Cu-Based quantum dots are being explored as a potential replacement for toxic Cd- or Pb-based QDs, with studies focusing on the impact of different reaction conditions on the resulting morphologies and optical properties. By carefully controlling the ZnS shell deposition, researchers have optimized the synthesis of CIZS/ZnS/ZnS QDs and produced highly fluorescent core/shell/shell heterostructured QDs with high PLQYs. Additionally, the successful creation of giant ZnS shell QDs opens up possibilities for further development in this area.
Article
Physics, Multidisciplinary
Pradip Kumar Kalita, Yowa Nanung, Hirendra Das
Summary: CdS, ZnS and CdS/ZnS core-shell quantum dots were synthesized and their structural, optical and electrical properties were investigated. Increasing shell thickness introduced higher defect density, defect induced crystal strain and charge separation, leading to quantum tunneling in conduction mechanism of quantum dots. The synthesized semiconductor core/shell quantum dots exhibited oscillatory behavior in their current-voltage characteristics, attributed to coulomb-blockade oscillations. The present study systematically studied room temperature quantum oscillation behavior in core/shell quantum dots and can contribute to the development of future quantum oscillatory nanoscale devices.
Article
Materials Science, Ceramics
Yu-Sheng Tsai, Jyun-Rong Chen, Chang-Hsueh Lee, Chih-Chen Kuo, Ya-Hsuan Lin, Chun-Chieh Wang, Yu-Cheng Chang, YewChung Sermon Wu, Hsiang Chen
Summary: In this study, different types of ZnO-based nanocomposites were fabricated and characterized. The etching of ZnO nanorods increased the surface area and defect concentration, while sulfurization of the ZnO/ZnS nanotubes reduced defects and improved surface roughness. The results indicate that ZnO and ZnO/ZnS nanotubes hold promise for sensing device applications.
CERAMICS INTERNATIONAL
(2022)
Article
Nanoscience & Nanotechnology
Yanbing Lv, Yucheng Yuan, Ning Hu, Na Jin, Dangdang Xu, Ruili Wu, Huaibin Shen, Ou Chen, Lin Song Li
Summary: This study presents a synthesis method for ultra-thick shell quantum dots and their application in C-reactive protein detection, achieving nearly a 3-fold enhancement in detection sensitivity and a 2-fold increase in shelf life. The performance improvements in protein detection are attributed to the use of core/shell quantum dots with high particle stability, high PL QYs, and a large surface area conducive to surface antibody coupling.
ACS APPLIED NANO MATERIALS
(2021)
Article
Engineering, Environmental
Vempuluru Navakoteswara Rao, Parnapalle Ravi, Marappan Sathish, Nagappagari Lakshmana Reddy, Kiyoung Lee, Mohan Sakar, Pathi Prathap, Murikinati Mamatha Kumari, Kakarla Raghava Reddy, Mallikarjuna N. Nadagouda, Tejraj M. Aminabhavi, Muthukonda Venkatakrishnan Shankar
Summary: This study elucidated the synthesis of mono-dispersed ZnS/NiO-core/shell nanostructures with controlled thermal treatments, showing enhanced H2 generation and stable photocurrent density in water splitting experiments. The optimized ZnS/NiO-core/shell exhibited 1.42 times higher H2 generation compared to pristine ZnS-core and 64.5 times higher than pristine NiO-shell. Additionally, the developed photocatalysts demonstrated excellent stability in recyclability tests.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Spectroscopy
Branka Hadzic, Branko Matovic, Marjan Randjelovic, Radmila Kostic, Maja Romcevic, Jelena Trajic, Novica Paunovic, Nebojsa Romcevic
Summary: This experimental study on ZnO@ZnS core-shell nanostructures with an active layer reveals key optical phonon modes and highlights the significance of the active layer for potential thermoelectric applications.
JOURNAL OF RAMAN SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Jiajia Ning, Yuan Xiong, Stephen Kershaw, Andrey L. Rogach
Summary: The most efficient way to improve the stability and optical properties of nanocrystals is to grow shell around their cores. Different growth modes of the ZnS shell on ZnSe nanorods were observed depending on the crystal structure of the ZnSe core, leading to differences in photoluminescence quantum yield.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shijia Zeng, Zhenbo Li, Wenjiang Tan, Jinhai Si, Yuren Li, Xun Hou
Summary: This study compares the ultrafast carrier dynamics in InP/ZnSe/ZnS core/shell/shell quantum dots (CSS-QDs) and InP/ZnS core/shell QDs (CS-QDs), revealing the impact of the ZnSe midshell on carrier dynamics. The results show that the ZnSe midshell enhances electron delocalization, prolongs the in-band relaxation time of electrons and holes, and reduces defect emissions. Additionally, the ZnSe midshell leads to an increased density of higher-energy hole states, which may decrease the probability of Auger recombination.
Article
Chemistry, Multidisciplinary
Hongda Lu, Shi-Yang Tang, Jiayuan Zhu, Xumin Huang, Helen Forgham, Xiangke Li, Ao Shen, Guolin Yun, Jinming Hu, Shiwu Zhang, Thomas P. Davis, Weihua Li, Ruirui Qiao
Summary: By nanoengineering liquid metal nanoparticles and using galvanic replacement, diverse core-shell nanostructures including LM@Au, Au@Ga oxide, and hollow Ga oxide nanoparticles are successfully fabricated. LM@Au exhibits exceptional photothermal performance with a conversion efficiency of 65.9%, which is five times that of gold nanoparticles. The high photothermal conversion efficiency and biocompatibility of LM@Au show promising applications in hyperthermia cancer therapy.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Paul Cavanaugh, Ilan Jen-La Plante, Christian Ippen, Ruiqing Ma, David F. Kelley, Anne Myers Kelley
Summary: Resonance Raman spectra and absolute cross sections of InP/ZnSe/ZnS core/shell/shell nanocrystals were obtained at different excitation wavelengths, revealing differences in phonon features attributed to various stoichiometries of the structures. The presence of excess indium in the ZnSe shell was found to influence the Raman intensities and frequency distributions, supporting previous assignments of hole trapping at indium defects in the shell.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Jiakuan Zhang, Chuyue Li, Jiongzhao Li, Xiaogang Peng
Summary: Size- and shape-controlled CdSe/ZnSe core/shell and CdSe/ZnSe/ZnS core/shell/shell nanocrystals with zinc-blende structure are synthesized. The ligand strain between the inorganic crystal surface and organic ligands plays a key role in ZnSe epitaxy. The lattice strain between the CdSe and ZnSe affects the photoluminescence of CdSe/ZnSe/ZnS core/shell/shell QDs.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Ja-Jung Koo, Kwang Hwan Jung, Kyungsu Park, Won Ja Min, Kyu-Sang Yu, Zee Hwan Kim, Jin-Kyu Lee
Summary: In this study, the interfacial structures of CdSe/ZnS QDs were investigated using TOF-MEIS. The results showed the existence of an alloyed layer at the interface between CdSe and ZnS in typical CdSe/ZnS QDs. The dissolution of CdSe seeds during the synthesis steps was identified as the cause of this interfacial alloying, and the ligand environment of the solvent was found to influence the shape of the interface.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Yuan Liu, Cong Zhao, Jingzhou Li, Shixi Zhao, Xiaomin Xu, H. Y. Fu, Cunjiang Yu, Feiyu Kang, Guodan Wei
Summary: The high-performance photodetectors based on environmentally benign CuInS2/ZnS core-shell quantum dots, in combination with organic blend films, achieve efficient energy transfer and charge separation, leading to low dark current and high detectivity. This work demonstrates a feasible strategy to develop highly sensitive photodetectors using heavy-metal-free core-shell quantum dots.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Shijia Zeng, Zhenbo Li, Wenjiang Tan, Jinhai Si, Yuren Li, Xun Hou
Summary: The hole transfer process from the core to the surface in InP/ZnS and InP/ZnSe/ZnS quantum dots was studied comparatively using ultrafast spectroscopy and time-resolved photoluminescence technology. The results show that InP/ZnSe/ZnS quantum dots have a faster hole transfer rate with a ZnSe midshell thickness of about 2.2 nm. This is because the ZnSe midshell increases the density of higher-energy hole states, allowing a larger proportion of photoexcited holes to be distributed in these states compared to InP/ZnS quantum dots. The easier hole transfer in these higher-energy states makes InP/ZnSe/ZnS quantum dots more suitable for photoelectric conversion systems than InP/ZnS quantum dots.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Nanoscience & Nanotechnology
O. Kuzyk, O. Dan'kiv, R. Peleshchak, I. Stolyarchuk
Summary: A model of spherical quantum dot of the core/multilayer shell type, taking into account the mismatch between lattice parameters and pressure due to surface curvature, was constructed. The influence of external pressure on the band structure of a CdSe-core/ZnS/CdS/ZnS-shell quantum dot was investigated using the deformation potential method. It was found that the optical band gap width of the quantum dot can be changed in a wide range by adjusting the thickness of the shell layers and the amount of pressure. Additionally, a critical value of comprehensive pressure was observed for small CdSe QD cores, above which the value of baric coefficient decreases abruptly. The thickness of the CdS layer in the shell also affected the critical pressure.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Engineering, Electrical & Electronic
I. G. Marquez, R. Romano-Trujillo, J. M. Gracia-Jimenez, R. Galeazzi, N. R. Silva-Gonzalez, G. Garcia, A. Coyopol, F. G. Nieto-Caballero, E. Rosendo, C. Morales
Summary: Tin sulfide (SnS) thin films were successfully deposited on acetate plastics substrates by chemical bath deposition at 70 degrees C for 2 h with varying pH values. The results showed that the pH variation influenced the crystalline structure, band gap, and S/Sn ratio of SnS films, demonstrating the potential for applications in flexible devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Crystallography
Reina Galeazzi Isasmendi, Isidro Juvenal Gonzalez Panzo, Crisoforo Morales-Ruiz, Roman Romano Trujillo, Enrique Rosendo, Ivan Garcia, Antonio Coyopol, Godofredo Garcia-Salgado, Rutilo Silva-Gonzalez, Ivan Oliva Arias, Carolina Tabasco Novelo
Summary: The study involved depositing Copper oxide (CuO) films on glass substrates using microwave assisted chemical bath deposition method with varying pH values. The experiments showed that the CuO films obtained had monoclinic crystalline phase, nanostructured surface morphology, stoichiometric Cu/O ratio of 50/50 at%, and a band-gap energy value of 1.2 eV.
Article
Crystallography
I. J. Gonzalez-Panzo, C. Tabasco-Novelo, E. Rosendo, A. Oliva, R. Romano-Trujillo, R. Galeazzi, C. Morales, G. Garcia, A. Coyopol
Summary: ZnSe nanoparticles were synthesized in aqueous colloidal solution at different pH levels and temperature. Physicochemical analysis was conducted to study the formation and growth process of ZnSe-NPs. Characterization of the ZnSe-NPs was performed using XRD, Raman spectroscopy, SEM, and EDS techniques, revealing mixed cubic and hexagonal structures with nanoscale crystal sizes.
JOURNAL OF CRYSTAL GROWTH
(2022)
Article
Physics, Applied
E. Figueroa-Gonzalez, R. Mendoza, A. Oliva, C. Gomez-Solis, L. S. Valle-Garcia, E. Oliva, V Rodriguez-Gonzalez, A. Encinas, J. Oliva
Summary: We report on the fabrication and electrochemical characterization of biodegradable and flexible supercapacitors. These supercapacitors use graphene nanoplates coated coconut fibers as conductive electrodes, an oral electrolyte solution and rice paper as electrolyte and separator. By adding MgTiO3 nanoparticles to the anode, the capacitance and specific energy of the supercapacitors were enhanced. The biodegradable cells exhibited long discharge times and stable output voltage, which have not been observed previously for such supercapacitors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Cell Biology
Manuel A. Fernandez-Parrilla, David Reyes-Corona, Yazmin M. Flores-Martinez, Rasajna Nadella, Michael J. Bannon, Lourdes Escobedo, Minerva Maldonado-Berny, Jaime Santoyo-Salazar, Luis O. Soto-Rojas, Claudia Luna-Herrera, Jose Ayala-Davila, Juan A. Gonzalez-Barrios, Gonzalo Flores, Maria E. Gutierrez-Castillo, Armando J. Espadas-Alvarez, Irma A. Martinez-Davila, Porfirio Nava, Daniel Martinez-Fong
Summary: In Parkinson's disease, expressing human cerebral dopamine neurotrophic factor (hCDNF) in dopamine neurons using a neurotensin-polyplex nanoparticle system can reverse pathological features, restore behavior, and improve disease symptoms.
NEURAL REGENERATION RESEARCH
(2022)
Article
Materials Science, Composites
Ivan Perez, Samuel Flores, Cesar Ortiz, Miguel Rivero, Jose Emilio Corona, Andres Ivan Oliva, Francis Aviles
Summary: The dispersion state of multilayer graphene sheets in polymers significantly affects the properties of nanocomposites. By adjusting roller gaps and processing cycles, smaller and more densely packed agglomerates can be achieved, impacting the electrical conductivity and mechanical properties of the nanocomposites. The density of agglomerates plays a key role in governing the piezoresistive sensitivity.
POLYMER COMPOSITES
(2022)
Article
Energy & Fuels
R. Mendoza, J. Oliva, K. P. Padmasree, A. Oliva, A. Mtz-Enriquez, A. Zakhidov
Summary: The study demonstrated that incorporating CaCo oxide into solid state supercapacitors made from surgical face mask waste and blister packs recycled from paracetamol packaging can significantly improve energy density and capacitance. The devices showed high capacitance retention even under pressure conditions, with minimal decrease in capacitance. Analysis also revealed the presence of additional redox species and oxygen vacancies, indicating the ability of the devices to store charge efficiently through redox reactions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
A. Molina, A. Oliva, A. Zakhidov, E. Valadez-Renteria, V Rodriguez-Gonzalez, A. Encinas, J. Oliva
Summary: This work presents the fabrication of flexible and biodegradable sensors for NO2 detection. The sensors show active sites on their surface for gas detection and exhibit advantages of low power consumption and recoverability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Optics
A. Coyopol, M. A. Vasquez-Agustin, G. Garcia-Salgado, R. Lopez-Romirez, R. Romano-Trujillo, M. R. Jimenez-Vivanco, E. Rosendo, C. Morales, R. Galeazzi, S. A. Perez-Garcia
Summary: This study investigates the effect of carbon atomic concentration on the transition from SRO to SiCxOy films. It is found that a carbon atomic concentration greater than 1.3 leads to strong photoluminescence emissions, and the presence of Si nanocrystals is possible at lower carbon concentrations.
JOURNAL OF LUMINESCENCE
(2022)
Article
Engineering, Chemical
Luis Alfonso Can-Herrera, Andres Ivan Oliva, Jose Manuel Cervantes-Uc
Summary: Polycaprolactone (PCL) and poly(lactic acid) (PLA) are two polymers with unique properties, and their blending can produce a new biodegradable material with balanced properties. However, both PCL and PLA are highly hydrophobic materials. The surface characteristics of electrospun PCL/PLA blends can be improved by air plasma treatment and adjusting the content of its components.
POLYMER ENGINEERING AND SCIENCE
(2022)
Article
Physics, Multidisciplinary
Lucero Alejandra Esquivel-Mendez, Maria De Lourdes Albor-Aguilera, Roberto Carlos Ruiz-Ortega, Miguel Angel Gonzalez-Trujillo, Cesar Hernandez-Vasquez, Jaime Santoyo-Salazar, Miguel Tufino-Velazquez, Gabriela Rueda-Morales, Osvaldo Vigil-Galan, Gerardo Silverio Contreras-Puente
Summary: Deposition of polycrystalline CdTe thin films in large areas faces challenges of non-uniformity and pin holes. This study reports CdTe and CdS thin films with optimal physical properties for potential application in solar cells, and fabricates CdTe mini-modules for outdoor characterization.
REVISTA MEXICANA DE FISICA
(2022)
Article
Energy & Fuels
E. Figueroa-Gonzalez, A. Oliva, V Rodriguez-Gonzalez, C. Gomez-Solis, C. R. Garcia, J. Oliva
Summary: Recycling materials containing plastics is important for environmental protection, as they can contribute to microplastic contamination in oceans and rivers. By using recycled tetrapak/graphene and Ag/BaMoO4 nanoparticles, the researchers fabricated supercapacitors with improved capacitance, energy density, and stability. This study demonstrates that utilizing recycled materials like tetrapak can reduce costs and plastic pollution in the environment.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Jinrong Yin, Jialun Li, Liying Wang, Bin Cai, Xijia Yang, Xuesong Li, Wei Lu
Summary: This study provides a simple and feasible method to fabricate a monomer photovoltaic electrochromic supercapacitor device by integrating dye-sensitized solar cells (DSSC) and electrochromic supercapacitors (ESC). The device exhibits high specific capacitance, excellent capacitance retention, and fast coloring/discoloring response. The multifunctional smart window can be used not only as a typical electrochromic window but also as an energy storage device simultaneously, showing great potential for various applications.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Multidisciplinary
J. I. Alvarez-Vazquez, J. Sastre-Hernandez, G. Ortega-Cervantez, R. Mendoza-Perez, J. Aguilar-Hernandez, J. Santoyo-Salazar, J. A. Del Oso
Summary: This study discusses the potential application of transparent thin films of Zinc Oxide doped with Aluminum (AZO) as a substrate for single-wall carbon nanotubes processing. The AZO thin films were deposited using radiofrequency magnetron sputtering technique at room temperature. Characterization of the AZO thin films and processed bilayers of Zinc Oxide: Aluminum/Single wall carbon nanotubes was done using various techniques. The feasibility of AZO thin films as a substrate for single wall carbon nanotubes in photovoltaics devices was analyzed based on their electrical, morphological, and optical properties.
ENGINEERING RESEARCH EXPRESS
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)