Article
Engineering, Environmental
Salah Alden Alklaf, Songhe Zhang, Jianzhong Zhu, Benjamin Manirakiza, Felix Gyawu Addo, Shaozhuang Guo, Fawze Alnadari
Summary: This study investigates the response of Vallisneria natans plants to titanium dioxide nanoparticles and their impact on nitrogen species removal in wetlands. It suggests that the nanoparticles have toxic effects on the plants and epiphytic microbial communities, leading to a decline in nitrogen concentrations.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Multidisciplinary Sciences
Martin Fraenzl, Frank Cichos
Summary: This study proposes a method of manipulating nano-objects based on nanoscale hydrodynamic boundary flows induced by optical heat generation. The research shows that hydrodynamic boundary flows enable the trapping and manipulation of nano-objects near surfaces. This finding has direct implications for nanoscopic manipulation systems like plasmonic nanotweezers.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Leroy Grob, Lennart J. K. Weiss, Emir Music, Ilja Schwertfeger, George Al Boustani, Julian Feuerbach, Marta Nikic, Lukas Hiendlmeier, Philipp Rinklin, Bernhard Wolfrum
Summary: With the increasing use of silver nanoparticles in consumer products, there is a demand for cost-effective and on-site monitoring of their impact on the environment. This study introduces a method using screen-printed and laser-ablated microelectrode arrays for electrochemical detection of 20 nm-sized silver nanoparticles through collision chemistry. The electrodes' morphology is analyzed and their electrochemical properties are characterized, leading to the calibration of the microelectrode arrays and the demonstration of on-site applications with a portable nanoparticle detection device.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Xi-Han Zhao, Yi-Ge Zhou
Summary: Nano-impact electrochemistry (NIE) has gained attention as a new electroanalytical approach for single nanoparticles in solution. The proposed spike detection algorithm for processing experimental data shows promising potential for automated analysis with high efficiency and accuracy, as demonstrated by the agreement with results from transmission electron microscopy (TEM).
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Physical
Hongyu Gan, Guangming Liu, Chaohua Huang, Rongmao Tang, Yongqiang Liu, Chao Shi
Summary: This study investigated the effects of pH and current density on cyanide-free succinimide baths. The highest polarizability and reversibility were observed at pH9, which was attributed to the hydrolysis of succinimide and formation of NH3. XPS measurements and chronoamperometry studies confirmed the hydrolysis of succinimide and the closer-to-instantaneous nucleation of silver in the bath. The fine grain size of the silver film obtained at a current density of 0.4 A/dm(2) was attributed to instantaneous nucleation and nucleation point interactions.
SURFACES AND INTERFACES
(2021)
Article
Spectroscopy
Ahmed S. Fayed, Rania M. Youssif, Nahla N. Salama, Eman S. Elzanfaly, Hassan A. M. Hendawy
Summary: A bio-analytical method using silver nanoparticles to enhance the fluorescence intensity for estimating non-classical beta-lactam antibiotics meropenem and ertapenem showed good linear relationship, detection limit, and successful application in drug substances and pharmaceutical vials. The method's sensitivity and practicality facilitated direct analysis of meropenem in real plasma samples, with potential benefits for various applications exploiting enhanced fluorescence occurrence.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Multidisciplinary
Julio Car, Niksa Krstulovic
Summary: In this work, it is demonstrated that the size of silver nanoparticles in a colloidal solution can be determined by considering the wavelength of the surface plasmon resonance and the dielectric functions of the material and medium. A novel analytical model is developed to determine the size of silver nanoparticles by applying shift functions to UV-Vis spectra, resulting in characteristic diameters of a log-normal size distribution function.
Article
Biochemistry & Molecular Biology
Monika Adamowska, Bartosz Paluba, Wojciech Hyk
Summary: A chronoamperometric method for the synthesis of silver nanoparticles in aqueous solution without adding stabilizing agents is proposed. A theoretical model is developed which predicts the structural parameters of the synthesized nanoparticles. The efficiency of the method is confirmed by comparing the predicted particle sizes with the results obtained from TEM and DLS measurements. The study highlights the importance of considering the polydispersity of the nanoparticle samples in the analysis.
Article
Physics, Applied
S. Shamaila, Ayesha Jalil, Muhammad Ishfaq, R. Sharif
Summary: This study evaluated the in vitro sunscreen activity of an emulsion containing ZnO and Ag nanoparticles synthesized from leaves' extracts. The emulsion showed photo-protective action and could be used to improve cosmetics formulation.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Irina G. Koryakina, Polina K. Afonicheva, Konstantin Arabuli, Anatoly A. Evstrapov, Alexander S. Timin, Mikhail Zyuzin
Summary: This review highlights recent advances in microfluidic approaches for the synthesis of optically responsive nanomaterials, emphasizing the general background of microfluidics, common considerations in the design of microfluidic chips, and theoretical models of nanoparticle formation mechanisms. Comparisons with conventional synthesis methods are provided, along with the applications of optically responsive nanoparticles in nano- and biophotonics.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Soumyakanti Maiti, Amitabha Bhattacharya
Summary: Different clutter removal algorithms were studied and implemented for human life detection, with focus on the suitability of subspace projection methods in inhomogeneous investigation domains. Singular value decomposition was found to be more effective in removing clutter in diverse inhomogeneous investigation domains compared to other techniques.
IEEE SENSORS JOURNAL
(2021)
Review
Biochemistry & Molecular Biology
Yucheng Yuan, Liangping Ding, Yang Chen, Guoqiang Chen, Tianbao Zhao, Yunlong Yu
Summary: Healing of defective skin tissue, especially chronic wounds, is a complex process that can cause extensive suffering and high cost for patients. Traditional wound dressings are not sufficient for the whole wound healing process, so there is a need to develop new wound dressings with multiple functions. Nano-silver and naturally derived polysaccharides have shown great potential in wound healing due to their antibacterial properties, good biocompatibility, and affordability.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Chemistry, Physical
Sudip Bhowmick, Joy Mukherjee, Biswarup Satpati, Prasanta Karmakar
Summary: Isolated silver nano-dot formation on pre-patterned silicon nitride nano templates using ion bombardment was reported. The presence of the Ag dots significantly enhanced the Raman signal, with a change in light reflectance observed on the surface. The study described the growth mechanism of pyramidal structures by ion bombardment and the process of isolated Ag dot formation.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Ya-Meng Wu, Pei-Chen Zhao, Bin Jia, Zhe Li, Shuai Yuan, Cheng-Hui Li
Summary: Silver nanoparticles have broad spectrum antimicrobial activities, but their tendency to aggregate reduces their antibacterial effectiveness. A metal-organic framework modified with Ag(i) shows highly effective antibacterial activity against E.coli and S. aureus.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Francesco Mattarozzi, Nienke Visser, Jan Willem de Rijk, Peter Ngene, Petra de Jongh
Summary: This study presents a strategy for synthesizing highly dispersed, ligand-free silver Ag nanoparticles supported on carbon, emphasizing the importance of heat treatment atmosphere and carbon surface chemistry in controlling the Ag particle size. The Ag weight-based activity of the catalysts scales inversely with particle size, while the Ag surface-specific activity is independent of particle size in the 10-30 nm range.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
