Article
Chemistry, Physical
Youngtae Park, Changsoo Lee, Jungwoo Choi, Phil Woong Kang, Christina Scheu, Hyuck Mo Lee, Pyuck-Pa Choi, Chanwon Jung
Summary: In this study, it was demonstrated that the interface between Ag-rich and Cu-rich AgCu phases enhances the oxygen reduction activity of model alloys. AgCu alloys with eutectic composition showed a typical lamellar structure of Ag-rich and Cu-rich AgCu phases, and exhibited better oxygen reaction activity despite a lower fraction of Ag-rich AgCu phase. Atom probe tomography analysis revealed the presence of a CuO layer at the interface of the two phases. Density functional theory calculations further explained the enhanced activity by showing the preferential adsorption of OH near the interface, facilitating the most sluggish OH desorption step.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
J. C. Medina, Victor I. Garcia-Perez, Rodolfo Zanella
Summary: In this study, nanoparticles of Ag, Cu, Au and Ag-Cu supported on TiO2 were evaluated for their antimicrobial performance. The bimetallic composite AgCu/TiO2 showed the highest bactericidal efficiency among all materials tested, with significant MBC values against various bacterial species. Au-based composite was found to be the least effective in killing bacteria, compared to Ag/Cu, Ag, and Cu-based composites.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Fang Zhou, Yan Zhu, Longlai Yang, De-Quan Yang, Edward Sacher
Summary: The aqueous dispersions of AgCu nanoparticles with enhanced antibacterial efficacy were prepared by the catalyzed reduction of Cu ions by PVP/PVA-stabilized Ag nanoparticles at 85 degrees C. The enhanced antibacterial performance of these nanoparticles was correlated with the release of Ag ions, proposing a simple model of AgCu NP formation and an enhanced antibacterial efficacy mechanism involving Ag ion release.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Biochemistry & Molecular Biology
Yujie Tao, Fang Zhou, Kaixin Wang, Dequan Yang, Edward Sacher
Summary: This study presents a method to synthesize AgCu nanoalloys at room temperature and reveals the kinetics of their formation. The SPR absorption is found to be linear with time early in the reaction, but does not follow the pseudo-first-order and pseudo-second-order kinetics models subsequently. The AgCu nanoalloys formed exhibit a continuous increase in antibacterial efficacy, which correlates with the formation process and Ag+ release.
Article
Chemistry, Multidisciplinary
Fuad Ameen
Summary: Bi-metallic Ag-Cu nanoparticles synthesized using Aspergillus terreus-mediated method exhibited high antioxidant and antibacterial activities. The synthesis conditions were optimized using response surface methodology, leading to an improvement in nanoparticle yield.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Analytical
Elizaveta P. Morozova, Tatiana E. Smoliarova, Kirill A. Lukyanenko, Maria A. Kirillova, Mikhail N. Volochaev, Anna S. Kichkailo, Rajeev Ranjan, Valentina A. Kratasyuk
Summary: The assessment of microbial contamination is crucial for ensuring food safety. A modern method for evaluating contamination is estimating ATP using firefly luciferase. This study found that gold nanoparticles stabilized with benzalkonium chloride and Triton X-100 enhanced the bioluminescent system, resulting in higher sensitivity for developing an ATP biosensor.
Review
Chemistry, Multidisciplinary
Abraham Mensah, Juan-Juan Shao, Jian-Ling Ni, Guang-Jun Li, Fang-Ming Wang, Li-Zhuang Chen
Summary: There is a direct relationship between the structural variations and luminescence of copper(I) halide complexes, which has been studied with derivatives of nitrogen, phosphorus, and sulfur ligands.
FRONTIERS IN CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Yuan-Yun Zhao, Feng Qian, Chengliang Zhao, Chunxiao Xie, Jianguo Wang, Chuntao Chang, Yanjun Li, Lai-Chang Zhang
Summary: Nanoporous metals prepared by dealloying show interesting properties and the facile fabrication of metallic ultra-thin freestanding nanoporous films is challenging. A novel strategy was reported here for the preparation of flexible metallic OF-NPFs, with potential applications in surface-enhanced Raman scattering detection. This work provides a reliable and simple method for synthesizing cost-effective and flexible metallic OF-NPFs.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Manoj Settem, Ajeet K. Srivastav, Anand K. Kanjarla
Summary: The study investigates the structure of octahedral Ag-Cu nanoalloys using BHMC searches to optimize shape and chemical ordering. The addition of Cu affects the shape and defects of the nanocrystal, with misfit strain playing a key role in determining the structure.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Murugesan Prasanna, Natarajan Logeshwaran, Shanmugam Ramakrishnan, Dong Jin Yoo
Summary: This study reports an efficient selective formate conversion electrocatalyst utilizing novel CuS active centers decorated over stable 1T metallic N-WS2/WO3 nanohybrids. The primary product, HCOO-, is produced with a yield of 55.6% at -1.3 V vs RHE. The electrocatalyst demonstrates excellent catalytic activity, selectivity, and stability.
Article
Multidisciplinary Sciences
Sajedeh Tehrani Nejad, Rahmatollah Rahimi, Mahboubeh Rabbani, Sadegh Rostamnia
Summary: This research focuses on the one-step synthesis of novel porphyrin-based nanocomposites using a photochemical strategy under visible light illumination. The synthesized nanocomposites, including ZnTPP/Ag, ZnTPP/Ag/AgCl/Cu, and ZnTPP/Au/Ag/AgCl, exhibited high antibacterial properties, which were tested against Escherichia coli and Staphylococcus aureus using various methods. The nanocomposites also showed admissible photosensitizing properties, mild reaction conditions, and potential for medical applications, photodynamic therapy, and water treatment.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Physical
Menglin Li, Xinpeng Wang, Jian Zhang, Yonghao Gao, Wen Zhang
Summary: This study develops a novel copper-based adsorbent using metal-organic frameworks (MOFs) to capture toxic radioiodine. The adsorbent shows high iodine uptake capacities and improved iodine selectivity.
APPLIED SURFACE SCIENCE
(2023)
Review
Biology
Xinzhen Fan, L'Hocine Yahia, Edward Sacher
Summary: The antimicrobial properties of Ag and Cu nanoparticles, whether used separately or in combination, are well known and can be further enhanced when mixed or alloyed. Factors such as the size, shape, and surface treatment of nanoparticles can influence their antimicrobial activities.
Article
Chemistry, Physical
Olumide Bolarinwa Ayodele
Summary: This study investigates the impact of oxalate and borohydride ligands functionalization on the properties and activity of zeolite Y-supported copper nanoparticles in CO2 hydrogenation. The functionalization resulted in differences in physicochemical properties and activity, with oxalate showing higher methanol yield and borohydride showing higher dimethyl ether yield. Additionally, the functionalization effectively minimized CO formation.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Przemyslaw J. Malinowski, Vadim Zhuravlev, Tomasz Jaron, Gustavo Santiso-Quinones, Ingo Krossing
Summary: Weakly Coordinating Anions (WCAs) help in forming exotic 'naked' cationic species, with the feasibility of synthesis approaches dependent on solvent basicity. This study focuses on novel complexes of Ag(i) and Cu(i) stabilized by perfluorinated alkoxyaluminate, with Cu-SO2 adducts showing exceptional stability. Screening of potential ligands based on DFT calculations is proposed to expand the chemistry with WCAs.
DALTON TRANSACTIONS
(2021)