Article
Environmental Sciences
Hongjuan Liu, Xi Wang, Yongjiang Li, Zefu Min, Hang You, Shuibo Xie, Yingjiu Liu, Huaming Yang
Summary: This study successfully synthesized nano-hydroxyapatite biomimetically and found that the morphology, crystallinity, and specific surface area of the synthesized CS/HAP nanorods influenced their U(VI) adsorption efficiency. The CS/HAP-40 with smaller particle size, lower crystallinity, and larger specific surface area exhibited higher removal efficiency for U(VI). Additionally, the removal mechanism of U(VI) in acidic and alkaline solutions differed.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Joanna Schneider, Jason X. Liu, Victoria E. Lee, Robert K. Prud'homme, Sujit S. Datta, Rodney D. Priestley
Summary: We demonstrate a method to fabricate stable hNPs with tunable morphologies by incubating polystyrene nanoparticles with citrate-stabilized gold nanocatalysts. The process parameters and molecular parameters can control the loading and dispersal of the nanocatalysts. We classify the morphologies into three regimes and show that their emergence has implications for controlling reaction rates.
Article
Chemistry, Multidisciplinary
Yanping Zhang, Hongtao Cui, Tao Liu, Mengle Yang, Xinyue Zhang, Aixiang Tian
Summary: Through tuning organic ligands with piperazine and morpholine groups and spacer length, five compounds based on [Mo8O26](4-) have been synthesized. These compounds exhibit different coordination modes and metal center connections, resulting in structures with different dimensions.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Zaheer Khan, Shaeel Ahmad AL-Thabaiti
Summary: Manganese dioxide/silver (MnO2/Ag) nanoparticles were prepared at room temperature using the KMnO4NaBH4 redox reaction. The optical and structural properties of MnO2/Ag were analyzed by UV-visible and Fourier transform infrared spectroscopies. The morphology was characterized using scanning and transmission electron microscopy, and X-ray diffraction. MnO2/Ag exhibited excellent adsorption activity for the removal of Congo red.
JOURNAL OF SAUDI CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Estefania Gonzalez Solveyra, David H. Thompson, Igal Szleifer
Summary: Protein adsorption onto nanomaterials is controlled by functionalizing their surface with polymers, and the efficiency depends on design parameters, surface curvature, and solution conditions. A comprehensive study analyzing the effect of these factors was conducted using molecular theory calculations.
Article
Chemistry, Multidisciplinary
Ton That Loc, Nguyen Duy Dat, Hai Nguyen Tran
Summary: In this study, a new type of alpha-Fe2O3 nanoparticles-loaded spherical biochar (H-SB) was developed for the removal of paracetamol (PRC) from water. The H-SB exhibited a relatively low surface area and total pore volume, with the presence of iron particles on its surface. The dominant form of iron nanoparticles in H-SB was confirmed to be alpha-Fe2O3, with a larger crystallite size and saturation magnetization. The adsorption study showed a slight decrease in the amount of PRC adsorbed by H-SB within the pH range of 2 to 11, reaching saturation after 120 minutes.
KOREAN JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Rex Manurung, Alessandro Troisi
Summary: In this study, we use a rapid method to calculate the electronic structure and orbital localization characteristics for 36 different polymer backbone structures. The results show that the reduced variation of coupling between adjacent monomers due to conformational fluctuations and the presence of just two monomers in the structural repeating units are equally important for achieving a large localization length. Surprisingly, a greater mismatch between the HOMO orbitals of fragments and a smaller coupling between them favor greater delocalization of the orbitals. The underlying physical reasons for these observations are discussed, and explicit and constructive design rules are proposed.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Biochemistry & Molecular Biology
Mariola M. Blaszczyk, Jerzy Sek, Lukasz Przybysz
Summary: This study proposed a model to predict the transport of nanoparticles through the skin based on the diffusion and adsorption concept. Experimental studies on the diffusion process of silver and copper nanoparticles through different membrane layers were conducted. The degree of adsorption was described using a modified Langmuir equation, and its dependence on surface parameters was investigated. The model was then related to the structure of the stratum corneum to predict the changes in mass of penetrating nanoparticles as a function of transport path length. The discussion also covered the influence of nanoparticle size, skin cell thickness, and viscosity of the intercellular cement on the presented model.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Nanoscience & Nanotechnology
Julia Lawless, Oisiin McCormack, Joshua Pepper, Niall McEvoy, A. Louise Bradley
Summary: Nanoparticle-on-mirror systems are a reliable method of compressing light into sub-nanometer volumes, and graphene can be used as a spacer in such systems to modulate the plasmonic modes. In this study, a simple system consisting of a gold nanosphere on top of a gold mirror separated by a graphene monolayer is investigated. The results show that the plasmonic response of the coupled nanosphere can be controlled by doping the graphene and adjusting the gap size, and at high doping levels, the plasmon energies can split due to the interaction between charge-transfer plasmon and gap plasmon. This study provides support for the unification of theories proposed by previous works.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Chemical
Prashanth Krishnamoorthy, David G. Dixon, Zihe Ren, Nelson Mora, Chih Wei Chao
Summary: This study investigates the adsorption and reaction rate constants of ethylene thiourea (ETu) using experimental and modeling approaches. The Redlich-Peterson isotherm successfully describes the adsorption behavior of ETu in a column of crushed ore. The model, populated with computed parameters, estimates ETu breakthrough curves under different conditions.
MINERALS ENGINEERING
(2022)
Review
Engineering, Environmental
Lichun Dai, Qian Lu, Haiqin Zhou, Fei Shen, Zhengang Liu, Wenkun Zhu, Huagang Huang
Summary: Biochar has gained attention in water pollution control due to its tunable physico-chemical properties, especially the oxygenated functional groups (OFGs) which act as key active sites for pollutant removal through adsorption and redox reactions. Various strategies for tuning OFGs on biochar have been explored, such as in-situ and ex-situ oxidation, as well as grafting carboxyl groups via reactions like cycloaddition/acylation, leading to enhanced performance in pollutant removal.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Nicola William, Faith Bamidoro, Paul A. Beales, Rik Drummond-Brydson, Nicole Hondow, Sarah Key, Alexander Kulak, Aidan Charles Walsh, Sophia Winter, Laurence Andrew Nelson
Summary: The properties of stable gold nanoparticle dispersions can be modified to affect their activity towards biomembrane models. Gold nanoparticle dispersions exhibit phospholipid monolayer activity, while silver nanoparticle dispersions do not. Coating gold nanoparticles with a thin layer of silver suppresses the particle/lipid interaction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Chunming Hu, Yaohua Huang, Richuan Rao
Summary: CeO2 adsorbents with different terminated surfaces were prepared by controlling urea content in pyrolysis methods. Adsorbents with lower urea content showed a less positively charged surface, inducing more difficult charge transfer and higher diffusion resistance. On the other hand, adsorbents with higher urea content presented a more positively charged surface, leading to easier charge transfer and lower diffusion resistance. The urea content greatly influences the physicochemical properties and adsorption capacities of the CeO2 adsorbents.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Nathan J. Ray, Jae-Hyuck Yoo, Salmaan Baxamusa, Hoang T. Nguyen, Selim Elhadj, Eyal Feigenbaum
Summary: A multistep deposit/dewet process utilizing thermally driven solid-state diffusional dewetting and Ostwald ripening has been proposed to control spatial parameters of nanoparticle ensembles in plasmonic arrays, providing unprecedented control over particular particle size and spacing in large-scale applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Mohd Ibrahim, Christiane Wenzel, Max Lallemang, Bizan N. Balzer, Nadine Schwierz
Summary: Ion-mediated attraction between DNA and mica is crucial in biotechnological applications and molecular imaging. The specific adsorption of ions at the mica surface compensates or overcompensates its negative charge. Different types of contacts between ions, DNA phosphate oxygens, and mica result in low- and high-force pathways and a broad distribution of detachment forces. Cs+ and water-mediated contacts lead to low detachment forces and high mobility of DNA, while direct ion-DNA or ion-surface contacts result in higher forces. K+, Mg2+, and Ca2+ are the most promising cations for imaging under physiological conditions.