Article
Chemistry, Physical
Jonathan De Roo
Summary: This article provides a perspective from a nanochemist on the field of colloidal nanocrystals, with a specific focus on nanocrystal synthesis. It discusses the chemistry involved with precursors, ligands, and solvents, as well as different crystallization mechanisms. The article also addresses the need for standard reporting practices in the field and encourages researchers to consider chemical equations and reaction by-products.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
P. Tim Prins, Federico Montanarella, Kim Dumbgen, Yolanda Justo, Johanna C. van der Bok, Stijn O. M. Hinterding, Jaco J. Geuchies, Jorick Maes, Kim De Nolf, Sander Deelen, Hans Meijer, Thomas Zinn, Andrei Petukhov, Freddy T. Rabouw, Celso De Mello Donega, Daniel Vanmaekelbergh, Zeger Hens
Summary: Experimental evidence supports the principle of producing semiconductor nanocolloids with uniform size distributions through hot injection synthesis. The interaction between the nucleation period and reaction-limited size focusing results in narrow size dispersions.
Review
Chemistry, Multidisciplinary
Zachary M. Sherman, Allison M. Green, Michael P. Howard, Eric Anslyn, Thomas M. Truskett, Delia J. Milliron
Summary: The assembly of tunable nanocrystal gels using reversible chemical bonding and polymer-induced depletion attractions shows promise for creating functional materials with controllable properties, although challenges exist in translating principles to the nanoscale. The control of structure and properties at both microscopic and macroscopic levels is key in guiding the reversible assembly of nanocrystal gels. Insights from statistical thermodynamic theory and computer simulation have helped in predicting conditions for gelation and optimizing experimental parameters for targeted functionalities.
ACCOUNTS OF CHEMICAL RESEARCH
(2021)
Review
Chemistry, Multidisciplinary
Namyoung Ahn, Cleiment Livache, Valerio Pinchetti, Victor I. Klimov
Summary: Lasers and optical amplifiers based on solution-processable materials, including colloidal quantum dots, have been highly sought-after for their compatibility, scalability, and ease of integration. Recent advances in colloidal nanocrystal lasing devices have shown promising progress towards the development of viable devices.
Article
Chemistry, Multidisciplinary
Nakara Bhawawet, Luis Polo-Parada, Piyuni Ishtaweera, Nathaniel E. Larm, Gary A. Baker
Summary: Three new cationic surfactants have been designed and used to synthesize gold nanoparticles. The synthesis method is simple and fast, and allows control over the size and shape of the nanoparticles. One of the surfactants shows promising results in terms of cell viability and may serve as a new biological surfactant.
Article
Chemistry, Physical
Keaton Prather, Jonathan T. Stoffel, Emily Y. Tsui
Summary: This perspective discusses how reduction, oxidation, and electrostatics on the surface of colloidal semiconductor nano-crystals (NCs) contribute to their electronic properties, including photoluminescence quenching or brightening and shifts in band edge potentials. It highlights recent efforts in combining spectroscopic, electrochemical, and computational methods to characterize redox-active surface sites and trap states and explores future opportunities in this field.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhongyong Wang, Alexander D. Christodoulides, Lingyun Dai, Yang Zhou, Rui Dai, Yifei Xu, Qiong Nian, Junlan Wang, Jonathan A. Malen, Robert Y. Wang
Summary: Colloidal nanocrystal assemblies show promise for various applications, but using them in actual devices can be challenging. This study finds that colloidal PbS nanocrystal superlattices with long-range order have higher thermal conductivities and Young's moduli compared to comparatively disordered nanocrystal films. The improved properties are attributed to enhanced ligand-ligand interactions in the superlattices.
Article
Materials Science, Multidisciplinary
Buzuayehu Abebe
Summary: The characteristics and structure of the synthesized porous colloidal nanocrystal framework material were confirmed using advanced instruments and analytical methods. The material showed complete degradation at high temperature, with nanoscale crystallite size and mesoporous structure. The composition and structure were predicted and confirmed through different compositional analysis methods.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Chemistry, Multidisciplinary
Philippe B. Green, Ona Segura Lecina, Petru P. Albertini, Anna Loiudice, Raffaella Buonsanti
Summary: This study presents a method to overcome the limitations of ligand exchange by growing an amorphous alumina shell using colloidal atomic layer deposition (c-ALD). The researchers demonstrate that c-ALD can create colloidally stable composite materials by trapping organic chromophores around the nanocrystal core. This approach allows for unique triplet energy transfer and the assembly of a triplet exciton funnel structure, which cannot be achieved through traditional ligand exchange procedures.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Yannick T. Guntern, Jan Vavra, Vikram V. Karve, Seyedeh Behnaz Varandili, Ona Segura Lecina, Chethana Gadiyar, Raffaella Buonsanti
Summary: Researchers have proposed a synthetic route to encapsulate nanocrystals (NCs) of various sizes, shapes, and compositions in a covalent organic framework (COF) for the creation of tunable core-shell hybrids. By understanding the heterogenous nucleation of COFs on NC seeds, they have expanded their synthetic approach to develop a step-by-step encapsulation strategy, resulting in multilayered core-shell-core-shell hybrids and yolk-shell nanostructures. This synthetic route is general and applicable to a broad variety of NCs with different properties, offering a new way to impart functionalities to COFs.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Liting Pan, Zhuo Peng, Hairong Yu, Ting Liang, Changjing Cheng
Summary: A robust and easily scalable solvothermal synthesis method using PSSMA as the capping ligand was developed to produce CNCs with excellent photonic properties. The surface charges of the CNCs and their photonic properties can be greatly affected by the molar ratio of the two acid segments in the ligand, as well as the dosage of PSSMA and the molar ratio of acetate ions to iron ions in the reactants.
NEW JOURNAL OF CHEMISTRY
(2021)
Article
Materials Science, Composites
Shuzhen Zhou, Xinxin Jin, Jingyi Hao, Mengjie Zhou, Xiaoguang Qiao, Xinchang Pang
Summary: The study presents a novel method for preparing LS-based superparamagnetic CNCs through electrostatic interaction and multistep surface modification. The protection of LS and blockage of CTAB led to well-dispersed individual gamma-Fe2O3 nanocrystals and a superparamagnetic property in CNCs. Moreover, LS-based CNCs exhibited excellent dye adsorption efficiency towards cationic dyes.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Perrin Godbold, Grayson Johnson, Akachukwu D. Obi, Rebecca Brown, Sooyeon Hwang, Robert J. Gilliard, Sen Zhang
Summary: The removal of surfactants from colloidal synthesized nanocrystals via ligand exchange with N-heterocyclic carbenes (NHCs) followed by protonation of the NHC ligands in acid efficiently cleans the nanocrystals' surface while preserving their uniform morphology and structure for catalysis. This surface activation strategy showed significantly improved catalytic activities for monodisperse Pt, Pd, and Au nanocrystals, surpassing other cleaning methods, as demonstrated in glycerol oxidation and CO2 reduction electrochemical reactions. This work highlights a new surface activation strategy that enables the efficient use of well-defined nanocrystal libraries for catalysis and other applications prepared by colloidal chemistry.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Huicheng Hu, Min Chen, Nan Yao, Linzhong Wu, Qixuan Zhong, Bin Song, Muhan Cao, Qiao Zhang
Summary: Highly stable CsPbBr3 colloidal nanocrystal clusters (CNCs) with uniform morphology and size were prepared using a PVP-assisted reprecipitation method. These CNCs exhibit enhanced resistance against a variety of polar solvents and show good reactivity and high durability in photocatalytic degradation of methylene blue in alcoholic systems. This method can also be generalized to the synthesis of lead-free perovskites CNCs.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Changjo Kim, Irem Kozakci, Junho Kim, Sang Yeon Lee, Jung-Yong Lee
Summary: In this study, a design strategy to improve the performance of silver bismuth disulfide (AgBiS2) nanocrystal/organic hybrid solar cells is proposed by optimizing the energy level structure and charge extraction. By selecting an appropriate hole-transporting layer material and surface treatment method, the power conversion efficiency of the solar cell is increased from 3.3% to 7.1%.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Xing Hong Cai, Qiang Yang, Min Wang
Summary: The study investigates the interactions between C-60 molecules and pristine or Ag/Au-doped Janus MoSSe and WSSe based on first-principles calculations. Results reveal that Ag/Au-doped Janus MoSSe/C-60 heterostructures have more negative adsorption energies compared to Ag/Au-doped MoS2 (or MoSe2)/C-60, with a stronger interaction on the S side. Ag-doped Janus MoSSe/C-60 heterojunction shows a negative Poisson ratio, and strain is found to be more beneficial for the adsorption process in the MoSSe-Ag-C-60-S-side system. Charge transfer behaviors differ between different adsorption sides of Ag-doped Janus MoSSe/C-60, while band structures indicate semiconductor properties for pristine Janus MoSSe (or WSSe)/C-60 and metallic behaviors for Ag/Au-doped Janus MoSSe (or WSSe)/C-60 heterostructures. These findings offer insights for potential mechanical, electronic, and engineering applications of nanodevices in the future.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Applied
Xia Yu, Xinghong Cai, Shuang Li, Liyong Luo, Jie Wang, Min Wang, Liang Zeng
Summary: By utilizing various experimental techniques such as fluorescence spectroscopy and UV-vis absorption spectroscopy, the interaction mechanism between theaflavin-3,3'-digallate (TFDG) and bovine serum albumin (BSA) was studied, demonstrating that hydrophobic interactions and hydrogen bonds play a dominant role in their interaction. This research provides the possibility for further development of nanoparticles with superior biochemical properties and potential exploration of BSA as a transport carrier for TFDG.
Article
Pharmacology & Pharmacy
Wenjing Yang, Dengchao Xie, Yuqi Liang, Nanxi Chen, Bo Xiao, Lian Duan, Min Wang
Summary: Kaempferol loaded fibroin nanoparticles show promise as a therapeutic platform for anti-inflammatory treatments due to their ability to overcome the limitations of kaempferol and their favorable drug release properties and biocompatibility.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yongqiang Ji, Minqiang Wang, Zhi Yang, Hao Wang, Muhammad Amin Padhiar, Jindou Shi, Hengwei Qu, Arshad Saleem Bhatti
Summary: In this study, it was found that the luminescent properties of CsPbBrI2 PQDs can be significantly improved through doping of univalent RV ions, especially when the molar ratio of Rb+/Cs+ is 0.1/0.9. Furthermore, the addition of a TiO2 nanoshell can greatly enhance the stability of these PQDs, allowing them to maintain their excellent red emitting characteristics even when immersed in water or exposed to illumination.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Yongqiang Ji, Minqiang Wang, Zhi Yang, Hao Wang, Muhammad Amin Padhiar, Hengwei Qiu, Jialin Dang, Yinru Miao, Yun Zhou, Arshad Saleem Bhatti
Summary: This study proposes a novel strategy to enhance the photoluminescence quantum yields of lead halide perovskite quantum dots. By substituting strontium and passivating chlorine defects, CsPbCl3 PQDs exhibit stronger emission intensity and improved stability.
Article
Biochemical Research Methods
Cui Ye, Songmin Xu, Zhen Wu, Minqiang Wang
Summary: This study successfully synthesized Cu-3(PO4)(2)/BiVO4 composite and utilized it as a PEC sensor for detecting propyl gallate in foods. The sensor exhibited a wide linear range, low detection limit, and high selectivity for other antioxidants.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Xing Hong Cai, Qiang Yang, Qun Hui, Min Wang
Summary: A two-dimensional structure of 1,3,5-benzenetriboronic acid (BCOH) obtained through dehydration reaction is investigated. BCOH is dynamically and thermally stable, and acts as an indirect semiconductor with good adsorption properties. Nitrogen oxides (NO or NO2) show better adsorption affinity on BCOH, improving its conductivity and indicating potential for nitrogen oxide detection.
Article
Chemistry, Multidisciplinary
Liyun Zhao, Yin Liang, Xinghong Cai, Jiaxing Du, Xiaoting Wang, Xinfeng Liu, Min Wang, Zhongming Wei, Jun Zhang, Qing Zhang
Summary: This study investigates the light emission properties of γ-indium selenide crystals under high pressure and finds that it has a wide spectral tuning range and high tunability. This can be attributed to the compression of the intralayer bonds and the band gap crossover phenomenon of different bands under high pressure.
Article
Chemistry, Physical
Min Wang, Xinghong Cai, Qiang Yang, Yao Tong, Sam Zhang
Summary: A new monolayer AlP5 material is proposed for detecting carcinogenic heavy metals in water, based on its stability and electronic properties. The adsorption capacity of AlP5 for heavy metals is influenced by the presence of water molecules. AlP5 shows strong interactions with As, Cd, and Hg, and is suitable for detecting and adsorbing these heavy metals.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Kaifu Zhong, Xinghong Cai, Min Wang
Summary: Different surface models of LiFePO4 and FePO4 structures were built to explain the desorption properties of Fe atoms based on density functional theory (DFT) computations. The band structures analysis revealed that the pristine LiFePO4 and FePO4 structures have semiconducting and metallic properties, respectively. The desorption energies and electronic properties calculations indicated that the (100) surfaces of LiFePO4 and FePO4 are the most favorable for desorption of Fe atoms.
Article
Chemistry, Physical
Yao Tong, Xinghong Cai, Wutang Zhang, Min Wang
Summary: Three predicted two-dimensional (2D) boron carbon nitrogen (BCN) structures, B8C2N8, B6C6N6-1, and B6C6N6-2, were investigated. It was found that all three structures are stable and have different electronic properties. B8C2N8 is a direct semiconductor, B6C6N6-1 is an indirect semiconductor, and B6C6N6-2 is metallic. B8C2N8 shows outstanding performance in the adsorption of TNT, making it a potential candidate for TNT detection.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Wenjing Yang, Ya Ma, Haiting Xu, Zhenhua Zhu, Jiaxue Wu, Cheng Xu, Wei Sun, Erhu Zhao, Min Wang, Rui L. Reis, Subhas C. Kundu, Xiaoxiao Shi, Bo Xiao
Summary: A fluorinated nanoparticle has been developed to improve the therapeutic outcomes of ulcerative colitis (UC). The results showed that the nanoparticles efficiently delivered drugs to the colon, promoted mucosal penetration, and had anti-oxidative and anti-inflammatory effects. In animal models, the nanoparticles significantly improved the therapeutic efficacy, reduced inflammation, and restored intestinal microbiota balance.
Article
Chemistry, Physical
Xinghong Cai, Qiang Yang, Yao Tong, Sam Zhang, Min Wang
Summary: A novel method for the detection and inactivation of aflatoxin B1 (AFB1) based on first-principles method is presented. The adsorption and inactivation of AFB1 on g-C3N5 nanotubes with the OH group was achieved. The introduction of the OH group destroys the C=C bond of AFB1 and forms a new substance AFB1-9-hydroxy (AFB1-OH), resulting in the inactivation of AFB1 toxicity.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Physical
Pengju Guo, Jun Dong, Cunyun Xu, Yanqing Yao, Jiayu You, Hongyu Bian, Wenqi Zeng, Guangdong Zhou, Xiaofeng He, Meng Wang, Xianju Zhou, Min Wang, Qunliang Song
Summary: Researchers used an eco-friendly solvent etching technique to fabricate an ultrathin PEDOT:PSS hole transport layer (HTL) and simultaneously introduce a green passivator (PEG) on the HTL surface. This method successfully thinned the PEDOT:PSS HTL, enhancing light transmission and improving the match with the Sn-Pb perovskite layer. As a result, the power conversion efficiency of Sn-Pb PSCs increased from 20.52% to 21.58% and the stability was significantly enhanced.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Qiang Yang, Luen Xu, Jingjing Wang, Xinghong Cai, Shi-Yu Lu, Qiuye Zhang, Yifan Duan, Min Wang, Hui Liu
Summary: Integration of Fenton-induced chemodynamic therapy (CDT) and near-infrared (NIR) laser-mediated photothermal therapy (PTT)/photodynamic therapy (PDT) into a nanocomposite enables effective tumor cell killing. The nanocomposite composed of an iron (Fe) ions-decorated polypyrrole (PPy) core, IR820 payload, and bovine serum albumin (BSA) coating demonstrates superior PTT/PDT/CDT synergistic effect, achieving significant tumor cell killing under laser irradiation. The up-regulation of calreticulin expression activates immunogenic cell death, promising complete tumor elimination.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
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)
