Article
Engineering, Environmental
Paula Pico, Konstantia Nathanael, Alessio D. Lavino, Nina M. Kovalchuk, Mark J. H. Simmons, Omar K. Matar
Summary: In this study, the production of silver nanoparticles under different operating conditions was investigated using a combination of population balance modelling and computational fluid dynamics. The results showed that the process parameters have an impact on the size and distribution of the nanoparticles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
A. Wasilewska, U. Klekotka, M. Zambrzycka, G. Zambrowski, I. Swiecicka, B. Kalska-Szostko
Summary: Understanding the properties of silver nanoparticles is crucial for developing new antimicrobial agents. In this study, silver nanoparticles were synthesized using natural reducing agents from plant extracts, and their antimicrobial properties were evaluated against various microorganisms. The results showed that the nanoparticles obtained from different extracts exhibited specific characteristics and varied antimicrobial activities.
Article
Chemistry, Multidisciplinary
Yuri Sergeyevich Pestovsky, Teerapol Srichana
Summary: In this study, gold nanoparticles were successfully synthesized using cyclodextrins as reducing agents at room temperature. The synthesis kinetics and particle size distribution were found to be pH-dependent, and the resulting nanoparticles were free of aggregates. The best preparations exhibited high absorbance and were ready to use without further processing. This method meets the requirements of green chemistry.
Article
Chemistry, Physical
O. Kuntyi, A. R. Kytsya, A. B. Bondarenko, A. S. Mazur, I. P. Mertsalo, L. Bazylyak
Summary: The method of contact glow discharge with sacrificial silver anodes is proposed for synthesizing silver nanoparticles stabilized by PVP. The size and polydispersity of AgNPs are affected by the concentration of PVP, showing a decrease in size and a non-monotonic relationship with stabilizer concentration. The electrochemical investigations reveal that the process provides a pseudo-stationary mode for stable nucleation and growth of nearly monodisperse nanoparticles.
COLLOID AND POLYMER SCIENCE
(2021)
Article
Environmental Sciences
Yi Zhao, Meixia Fan, Wenlin Zhou, Yanwei Li, Yan Wang, Zongming Xiu, Baoyu Gao
Summary: The study found that sludge containing added AgNPs can release dissolved silver and colloidal silver. Cl- and Ca2+ in the leaching solution can enhance the release of colloidal silver, which is irregular in shape and ranges in size from 40 nm to 100 nm. This research provides important insights for assessing the fate of AgNPs in wastewater treatment and sludge applications.
Article
Engineering, Chemical
Konstantia Nathanael, Sibo Cheng, Nina M. Kovalchuk, Rossella Arcucci, Mark J. H. Simmons
Summary: The synthesis of silver nanoparticles (AgNPs) is optimized using a T-junction microfluidic system and a machine learning approach. The reduction of silver nitrate with tannic acid in the presence of trisodium citrate is used to synthesize AgNPs. The study uses a decision tree-guided design of experiment method to determine the size of AgNPs.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Chemical
Daniel Besold, Sebastian Risse, Yan Lu, Joachim Dzubiella, Matthias Ballauff
Summary: The kinetic study on the reduction of 4-nitrophenol with borohydride catalyzed by silver nanoparticles showed that the particles are immobilized deep inside a PNIPAM hydrogel shell. A kinetic model related to the analysis of the reaction catalyzed by gold was presented, with results fitting well and indicating the substantial influence of NH2 adsorption on the kinetics of silver. The study also revealed a non-Arrhenius dependency of the reaction rate at different temperatures, caused by the thermoresponsive PNIPAM hydrogel, and provided insights into the partitioning coefficients of reactants and products in PNIPAM-based catalysts.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Zhiguo Zhang, Guihua Yang, Ming He, Letian Qi, Xincai Li, Jiachuan Chen
Summary: The synthesis of silver nanoparticles assisted by nanocellulose was studied for glucose detection. It was found that under specific conditions, nanocellulose exhibited good linear relationship with silver nanoparticles, which can be further developed as a sensor with high sensitivity and stability for glucose detection and as an antibacterial material.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Azhar Ahmad, Prashun Ghosh Roy, Shuiqin Zhou, Ahmad Irfan, Farah Kanwal, Robina Begum, Zahoor H. Farooqi
Summary: Chitosan based monodisperse poly[chitosan-N-isopropylmethacrylamide-acrylic acid] [P(CNA)] microgels were synthesized and used as micro-reactors to prepare Ag-P(CNA) hybrid microgels via chemical reduction of Ag+ ions. The resulting hybrid microgels were characterized by TEM, FTIR spectroscopy, and UV-vis spectroscopy. The catalytic potential of the Ag-P(CNA) hybrid system for the reduction of nitroarenes was evaluated using sodium borohydride as a reductant in aqueous medium. The Ag-P(CNA) hybrid microgel system exhibited stable, economical, and efficient catalytic activity for the rapid reduction of nitroarenes both individually and simultaneously.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Martin Pisarcik, Milos Lukac, Josef Jampilek, Frantisek Bilka, Andrea Bilkova, Ludmila Paskova, Ferdinand Devinsky, Renata Horakova, Matej Brezina, Tomas Opravil
Summary: Research shows that silver nanoparticles stabilized with heterocyclic phospholium surfactants have better stability and more positive zeta potential values, but their antimicrobial action is not significantly enhanced. In terms of cytotoxicity, these surfactant-capped silver nanoparticles exhibit higher cytotoxicity.
Article
Engineering, Environmental
Nihong Li, Shijun Zhu, Chen Wen, Hansen Xu, Chunyan Li, Shiqi Zhu, Rufei Li, Liqiang Chen, Xia Luo
Summary: This study investigated the adsorption, elimination, and toxicity of silver nanoparticles and silver nitrate in biofilms composed of the model bacterium Escherichia coli and natural mixed-species. The results showed that natural mixed-species biofilms were more tolerant to silver nanoparticles and silver ions than E. coli biofilms, and silver ions were more toxic to both biofilms than silver nanoparticles. The concentrations of certain biomolecules and metabolic enzymes were also found to be significantly different in the two types of biofilms, highlighting the advantages of metal-exposed natural mixed-species biofilms in terms of both structure and metabolic function. These findings contribute to our understanding of the environmental risks of engineered nanoparticles and provide insights into biofilm-based remediation of nanoparticles-contaminated aquatic environments.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Marius Stoian, Andrei Kuncser, Florentina Neatu, Mihaela Florea, Marcela Popa, Sorina N. Voicu, Mariana C. Chifiriuc, Anamaria Hanganu, Maria Elena Anghel, Madalina Tudose
Summary: This article presents the first efficient and environmentally friendly chemical reduction method for synthesizing aminated hyaluronic acid-based silver nanoparticles on the modified surface of titanium dioxide nanoparticles for biological applications. The study investigates the effect of nanoparticle size and chemical composition on the obtained materials and evaluates the antimicrobial, antioxidant, and anti-inflammatory activity of the fabricated composites.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Multidisciplinary
Majharul Haque Khan, Chao Han, Xuefei Wang, Weijie Li, Guojin Zhang, Zhenguo Huang
Summary: This research presents a simple and effective method for preparing silver closo dodecaborate (Ag2B12H12) films using an electrochemical route. The size of the Ag2B12H12 particles in the films can be controlled by adjusting the electrochemical parameters. Ag nanoclusters with controllable sizes can be generated by electrochemical reduction reactions or thermal anneal. These Ag nanoparticles show promising performance for hydrogen evolution reaction (HER) in an acidic solution. This study provides new insights into the synthesis of [B12H12](2-) based thin films, the generation of metal nano-powders, and their application in HER or other applications.
Review
Chemistry, Multidisciplinary
Vittorio Scardaci
Summary: This paper reviews the synthesis of anisotropic silver nanoparticles, focusing on the factors influencing the process and the role of key molecules like citrate. The different synthesis pathways lead to distinct reaction processes, with proposed applications for the nanoparticles obtained by these methods.
Article
Engineering, Environmental
Wanpeng Chen, Jiahui Song, Shaojie Jiang, Qiang He, Jun Ma, Xiaoliu Huangfu
Summary: EPS in activated sludge from wastewater treatment plants can influence interactions between nanoparticles, potentially altering their migration behavior. The presence of monovalent or divalent cations in solution affects the aggregation behaviors of silver nanoparticles and silver sulfide nanoparticles when aggregated by active EPS sludge. Understanding the surface mechanisms between EPS and NPs is crucial for comprehending the different fates of metal-based and metal-sulfide NPs in WWTP systems.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2022)
Article
Chemistry, Analytical
Amirmostafa Amirjani, Davoud Fatmehsari Haghshenas
Article
Materials Science, Multidisciplinary
Amirmostafa Amirjani, Niloofar Namazi Koochak, Davoud Fatmehsari Haghshenas
MATERIALS RESEARCH EXPRESS
(2019)
Review
Chemistry, Physical
Mohammed Mouhib, Alessandra Antonucci, Melania Reggente, Amirmostafa Amirjani, Alice J. Gillen, Ardemis A. Boghossian
Article
Chemistry, Multidisciplinary
Amirmostafa Amirjani, Niloofar Namazi Koochak, Davoud Fatmehsari Haghshenas
JOURNAL OF CHEMICAL EDUCATION
(2019)
Article
Environmental Sciences
Mojgan Heydari, Amirmostafa Amirjani, Mozhgan Bagheri, Iman Sharifian, Qodrat Sabahi
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Chemistry, Physical
Amirmostafa Amirjani, Farzad Firouzi, Davoud Fatmehsari Haghshenas
Article
Chemistry, Physical
Niloofar Namazi Koochak, Erfan Rahbarimehr, Amirmostafa Amirjani, Davoud Fatmehsari Haghshenas
Summary: This study presents a facile and sensitive spectroscopic detection method for cobalt ion using the surface plasmon resonance of silver nanotriangles. The developed sensor has a fast response time, low detection limit, and is suitable for analyzing body fluids and aqueous effluents.
Review
Chemistry, Analytical
Amirmostafa Amirjani, Erfan Rahbarimehr
Summary: This review summarizes the progress in utilizing nanostructured SPR-based chemical sensors and biosensors, covering principles, functionalization methods, challenges, and future trends. The discussion focuses on the state of the art in surface chemistry of plasmonic nanostructures and the sensing capability of various ligands and receptors for nanoparticles.
Article
Chemistry, Physical
Amirmostafa Amirjani, Parsa Zamanpour Abyaneh, Pendar Azaripoor Masouleh, Sayed Khatiboleslam Sadrnezhaad
Summary: In this study, numerical investigations were conducted on the optical properties of silver nanostructures using the boundary element method (BEM) and finite element method (FEM). The results showed similarities between the BEM and FEM results, but this similarity decreased with an increase in structural anisotropy. Specific considerations in the discretization process were revealed, and a self-written software was developed for predicting the optical cross-section of plasmonic ensembles.
Article
Chemistry, Analytical
Amirmostafa Amirjani, Paria Kamani, Hamid Reza Madaah Hosseini, S. K. Sadrnezhaad
Summary: A recyclable optical nanosensor was developed by immobilizing L-tyrosine functionalized silver nanoparticles on polyethylene terephthalate (PET) for rapid determination of Pb2+ ions. The sensor showed high sensitivity and repeatability, making it suitable for practical applications.
ANALYTICA CHIMICA ACTA
(2022)
Review
Nanoscience & Nanotechnology
Amirmostafa Amirjani, Nooshin Biazar Amlashi, Zahra Sadreddini Ahmadiani
Summary: Plasmonic nanoparticles enhance the photocatalytic performance of semiconductor nanoparticles through light scattering, light concentration, hot electron injections, and plasmon-induced resonance energy transfer. They extend the absorption range and increase the quantum yield of electron-hole generation. However, the lack of systematic design for plasmonic-semiconductor nanoparticle conjugation is a common issue in the reviewed papers. This review emphasizes the importance of rational optical design and provides a useful guideline for researchers interested in enhancing photocatalytic activity and understanding plasmon-enhanced phenomena.
ACS APPLIED NANO MATERIALS
(2023)
Review
Materials Science, Biomaterials
Amirmostafa Amirjani, Parand Shokrani, Sepideh Abbasi Sharif, Hossein Moheb, Hossein Ahmadi, Zahra Sadreddini Ahmadiani, Maryam Sharifi Paroushi
Summary: Plasmonic nanostructures have shown great potential in overcoming the limitations of conventional photosensitizers in cancer photodynamic therapy (PDT), such as their low reactive oxygen species (ROS) quantum yield, stability, and targetability. The collective oscillation of free electrons, known as surface plasmon resonance (SPR), enables various optical phenomena in their near-field and provides the ability to control the wavelength of light-matter interaction. This review focuses on the conjugation of plasmonic nanostructures with different compounds and nanoparticles to enhance the efficiency of the PDT process, providing valuable insights into the underlying mechanisms.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Review
Materials Science, Multidisciplinary
Amirmostafa Amirjani, S. K. Sadrnezhaad
Summary: Plasmonic nanostructures are widely used and their performance can be optimized by adjusting geometric parameters. This review revisits numerical methods for simulating optical responses and discusses the latest applications in various fields.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)