Article
Materials Science, Multidisciplinary
Nazmi Sedefoglu, Serdar Er, Kagan Veryer, Yusuf Zalaoglu, Fuat Bozok
Summary: In this study, CuO nanoparticles were synthesized using the green synthesis method and the effect of calcination temperature on their formation was investigated. The properties of CuO NPs were characterized through structural, optical, and morphological analyses. The results showed that CuO NPs had a monoclinic structure and exhibited a certain level of antibacterial activity. The NPs also promoted the growth and development of various plant seeds at specific concentrations.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Minjie Liu, Rumin Liu, Tao Yu, Wenyi Shao, Weiyong Yuan, Jianguo Lu
Summary: This study designed p-n heterojunctions in CuO/ZnO nano-hybrids, demonstrating remarkable antibacterial efficiency against Escherichia coli and Staphylococcus aureus. The formation of p-n heterojunctions elevated the generation of reactive oxygen species, which is responsible for the enhanced antibacterial behaviors. This research provides new insights for the development of high-efficient, broad-spectrum antibacterial materials for practical applications.
Article
Chemistry, Multidisciplinary
Banishree Sahoo, Lipsa Leena Panigrahi, Sonali Jena, Suman Jha, Manoranjan Arakha
Summary: This study investigates the role of oxidative stress generated at the interface of biosynthesized selenium nanoparticles (SeNPs) in defining antimicrobial and anti-biofilm activity. SeNPs with an average size of 119 nm were rapidly synthesized during the growth of Staphylococcus aureus using green chemistry principles. The antimicrobial study showed strong antimicrobial activity against both Gram-positive and Gram-negative bacteria, as well as anti-biofilm activity. The mechanism behind the antimicrobial activity of biosynthesized SeNPs was found to be the generation of reactive oxygen species (ROS) at the SeNPs interface, causing bacterial cell death through leakage of cytoplasmic contents.
Article
Engineering, Biomedical
Yuyi Zheng, Xiaojie Chen, Qi Zhang, Lin Yang, Qi Chen, Zhong Chen, Yi Wang, Di Wu
Summary: This study evaluates the effects of polydopamine with different structures on scavenging reactive oxygen species (ROS). Cellular study and inflammation-associated disease models confirm that the scavenging efficiency of polydopamine is highly influenced by their nanostructure, particularly the specific surface area.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hongjun Yan, Peiyuan Li, Fangzhou Wen, Qiuting Xu, Qing Guo, Wei Su
Summary: Research has shown that carbon quantum dots (CQDs) exhibit excellent photophysical properties, making them promising as novel carbon nano-materials in photodynamic therapy. However, the high cost of precursors, time-consuming production processes, and complex forms of doping/functionalization have hindered their economic design and use. In this study, ST-JHCQDs were prepared using natural plant turmeric as the carbon source through a simple and environmentally friendly method. The antibacterial effects of ST-JHCQDs on E. coli and S. aureus under blue light irradiation were found to depend on carbonization degrees, concentration, and light duration. ST-JHCQDs were effective in generating reactive oxygen species (ROS) under blue light irradiation, which led to disruption of cell membrane integrity and leakage of intracellular macromolecules in both bacteria, as observed through biomolecule leakage and confocal laser scanning microscope analysis.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
S. Thambidurai, J. Arumugam, M. Kandasamy, D. Balaji, N. Pugazhenthiran, R. Jothilakshmi, B. Sathish Kumar, K. Murugesan, S. Karthick Kumar, T. Muneeswaran, K. Jayakumar, S. Suresh
Summary: A green and facile method was used to synthesize copper oxide nanostructures using plant extracts. The CuO nanostructures showed enhanced antibacterial activity, especially the hierarchical CuO nanoparticles/nanorods with smaller size.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ekaterina Kolesova, Anastasia Bulgakova, Vladimir Maslov, Andrei Veniaminov, Aliaksei Dubavik, Yurii Gun'ko, Olga Efremenkova, Vladimir Oleinikov, Anna Orlova
Summary: Titania nanoparticle/CdSe quantum dot hybrid structures efficiently generate superoxide anions under visible light and exhibit significant bactericidal effects against various bacterial strains, particularly inhibiting growth of a photosensitive causative agent model of tuberculosis.
Review
Biotechnology & Applied Microbiology
Jun Yang, Chang Liu, Hui Sun, Ying Liu, Zhaogang Liu, Dan Zhang, Gang Zhao, Qiang Wang, Donghong Yang
Summary: Titanium and Titanium alloys are widely used in oral and maxillofacial surgery as biomedical implants. However, in specific clinical populations, the failure rate of these implants is higher. Studies show that the presence of Reactive Oxygen Species (ROS) increases in the bone tissue surrounding the implants, leading to oxidative stress in the host. Developing antibacterial technologies, incorporating active elements, and creating ROS-responsive implant materials are important areas of research.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Huimin Zhang, Xinyue Cao, Rongliang Liu, Wei Chen, Jiahui Sun, Xiaoning Tang
Summary: Efficient photocatalytic antimicrobial agents have been developed as a low-cost and environmentally friendly treatment strategy for microbial contamination in water bodies. In this study, different morphologies of layered Bi5O7NO3 photocatalysts were synthesized through hydrothermal synthesis by adjusting the pH value of the solution. The samples were tested for their selective adsorption and photocatalytic degradation of anionic and cationic dyes under visible light irradiation, as well as their antibacterial effect on Gram-negative and Gram-positive bacteria. The results showed that controlling the morphological size, oxygen vacancy defect concentration, and relative content of multivalent bismuth was crucial for improving the photocatalytic activity of these Bi5O7NO3 photocatalysts.
CERAMICS INTERNATIONAL
(2023)
Article
Multidisciplinary Sciences
Azzah Ibrahim Alghamdi
Summary: Green tea extracts were found to have good inhibitory and bactericidal activity against gram positive and negative bacterial strains. The active components like ECGC and catechins in green tea play a crucial role in these antimicrobial activities.
JOURNAL OF KING SAUD UNIVERSITY SCIENCE
(2023)
Article
Chemistry, Physical
Chunxiang Wan, Yuzhen Pan, Zhen Chen, Jinglu Hu, Zhe Zhang, Yawen Sun, Wei Ma
Summary: The study successfully prepared a novel composite material ZnO-Al2O3/GO with excellent piezocatalytic and antibacterial abilities, capable of degrading RhB solution and inhibiting the growth of Bacillus. By doping Zn ions and Al atoms, the material exhibited increased stability, conductivity, and enhanced catalytic efficiency of ZnO.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Biotechnology & Applied Microbiology
Yangzi Yang, Chengwei Wang, Ning Wang, Jiaxin Li, Yingchun Zhu, Jiantao Zai, Jingke Fu, Yongqiang Hao
Summary: Researchers have developed a biocompatible Cu3SnS4 nanoflakes that can generate reactive oxygen species (ROS) under visible light, leading to broad-spectrum antibacterial effects. The nanoflakes also exhibit near infrared absorption and high photothermal conversion efficiency, enabling photothermal disruption of bacterial membranes. In addition, Cu3SnS4 nanoflakes can accelerate wound healing and be used for surface-enhanced Raman scattering imaging for bacteria detection.
JOURNAL OF NANOBIOTECHNOLOGY
(2022)
Article
Chemistry, Applied
Ximena Faundez, Maria E. Baez, Jessica Martinez, Maria C. Zuniga-Lopez, Jeannette Espinoza, Edwar Fuentes
Summary: In this study, the relationship between the contents of polyphenols (PFs), reactive oxygen species (ROS) generation, and antibacterial activity (ABA) of honey was investigated. The analysis of honeys from central Chile revealed the average contents of phenolic acids, flavonoids, and metals. It was found that certain PFs and metals stimulate ROS generation, while others have marginal antioxidant effects. PFs were shown to enhance the ABA of honey against bacteria and the production of H2O2.
Article
Engineering, Environmental
Ze Zhang, Jingyu Sun, Xue Chen, Guizhu Wu, Zhengguo Jin, Donggang Guo, Lu Liu
Summary: The Ni/rGO nanocomposite exhibited highly effective antibacterial efficacy through the synergistic effects of photothermal therapy and oxidative damage, making it a promising disinfection material for water pollution purification caused by pathogenic bacteria.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Food Science & Technology
Peiyuan Li, Fangzhou Wen, Hongjun Yan, Qiuting Xu, Wei Su
Summary: This study investigated the photodynamic antibacterial effect of combining emodin with visible light on Escherichia coli and Staphylococcus aureus. The results showed that emodin mediated photodynamic antibacterial activity was influenced by concentration, light time, and pH. Confocal microscopy and scanning electron microscopy confirmed that emodin could produce reactive oxygen species to kill bacteria under visible light irradiation. After treatment with emodin and visible intermittent radiation, the population of S. aureus on fresh-cut apples significantly decreased during 5 days of storage, without affecting the weight and appearance of the apples. These findings suggest that combining emodin with visible light as a photodynamic inactivation method has the potential to enhance food safety.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
M. Kandasamy, M. Selvaraj, M. Mujahid Alam, P. Maruthamuthu, S. Murugesan
Summary: This study focuses on improving the photoconversion efficiency of dye-sensitized solar cells (DSSCs) by modifying TiO2 nanotubes with amine functionalized graphene oxide (GO). The results show that the surface structure and disorder of GO change after amine functionalization, and the incorporation of silver nanoparticles enhances dye adsorption and light gathering of the modified photoanode. The DSSC fabricated with the modified TiO2 nanotubes exhibits a high photo-conversion efficiency of 8.18% due to efficient charge transport, high dye loading, and broad light absorption.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Materials Science, Ceramics
M. Kandasamy, S. Murugesan, M. Selvaraj, M. Mujahid Alam
Summary: This study investigates the amine-functionalized ZnO-NR/NH2/GO nanocomposites prepared by a solution route and their optical and electrical properties. The results show that the amine-functionalized ZnO-NR/NH2/GO-2 nanocomposite exhibits strong visible light absorption and achieves a high power conversion efficiency in dye-sensitized solar cells. The enhancement is primarily attributed to the incorporation of aminosilicate and GO on the surface of ZnO-NRs, which facilitates rapid electron transfer.
CERAMICS INTERNATIONAL
(2022)
Article
Optics
M. Anand, S. Suresh, S. Anandan, G. Ahalya, S. Padmapriya, K. Rangesh
Summary: The photovoltaic performance of marine red seaweed Gracilaria corticata was examined in a dye-sensitized solar cell (DSSC) using acetone and methanol as extracting solvents. The results showed that DSSCs sensitized by acetone extract exhibited higher photovoltaic performance compared to those sensitized by methanol extract.
JOURNAL OF OPTICS-INDIA
(2023)
Article
Environmental Sciences
N. Pugazhenthiran, P. Sathishkumar, Omeer Albormani, S. Murugesan, M. Kandasamy, M. Selvaraj, S. Suresh, S. Karthick Kumar, D. Contreras, H. Valdes, R. Mangalaraja
Summary: The addition of silver-coated zinc oxide nanostructures in the photocatalytic degradation of ceftiofur sodium enhances the catalytic activity and ability to remove pharmaceutical wastewater.
Article
Materials Science, Multidisciplinary
R. Sasikala, M. Kandasamy, S. Suresh, V. Ragavendran, V. Sasirekha, N. Pugazhenthiran, S. Murugesan, S. Alex Pandian, M. N. M. Ansari, J. Mayandi
Summary: A simple chemical reduction process was used to prepare a nanocomposite of strontium titanate perovskite nanoparticles (SrTiO3 NPs) embedded in reduced graphene oxide (RGO-SrTiO3 NC). The RGO-SrTiO3 NC exhibited an optical band gap of 3.24 eV and a significantly lower crystallite size (31.69 nm) compared to SrTiO3 NPs (56.93 nm). The presence of RGO in the RGO-SrTiO3 NC was confirmed by Raman investigation, and modification of SrTiO3 by RGO was revealed by XPS analysis. The DSSC fabricated using the RGO-SrTiO3 NC photoanode showed an enhanced efficiency of 5.42% compared to SrTiO3 NPs (2.59%) due to the highly conducting RGO.
Article
Materials Science, Multidisciplinary
S. Karthick Kumar, S. Murugesan, S. Suresh
Summary: Copper oxide films of different morphologies were successfully prepared on copper substrates using the anodization method. The concentration of the NaOH solution used during the anodization process was found to be crucial in determining the nanostructured films formed. The films exhibited a mixture of CuO and Cu2O phases, with their proportions adjustable through changes in NaOH concentration and applied potential. The prepared films showed high solar absorptance, low thermal emittance, and superior solar selectivity, making the anodization method a promising technique for the fabrication of affordable solar selective absorbers.
Article
Chemistry, Multidisciplinary
M. Chinnarani, K. M. Prabu, S. Suresh
Summary: Silver (Ag) loaded TiO2 nanospheres (Ag-TiO2 NS) were synthesized and characterized. The Ag-TiO2 NS exhibited strong light absorption and better dye adsorption. The DSSC with 2 wt% loaded Ag-TiO2 NS photoanode showed significantly improved performance due to visible light harvesting and fast photogenerated electrons transfer facilitated by the plasmonic Ag.
RESULTS IN CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
G. Kalaiyan, K. M. Prabu, N. Suresh, S. Suresh
Summary: This study synthesized CuO nanospindle using petal extract of Hibiscus cannabinus to enhance its antibacterial activity against both Gram-positive and Gram-negative bacteria. The cytotoxic activity against human acute myeloid leukemia HL60 cell line was found to be 70% at a concentration of 500 μg/ml. The morphological features of CuO were analyzed using scanning electron microscopy (SEM), while its structural properties were analyzed using X-ray diffraction (XRD) pattern and Fourier transform infrared (FTIR) spectrum, which provided evidence for the formation of monoclinic crystal structured CuO. Energy dispersive X-ray spectroscopy (EDAX) analysis revealed the pristine properties of CuO nanospindles.
RESULTS IN CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
N. Murugesan, S. Suresh, S. Murugesan, B. K. Balachandar, M. Kandasamy, N. Pugazhenthiran, J. Selvi, P. Indira, S. Karthick Kumar
Summary: Reduced graphene oxide modified cobalt oxide nanocomposite thin films were prepared for solar selective absorber. The thin films had a face centered cubic structure with spherical shaped grains and rough surface. The absence of impurities was confirmed by energy-dispersive X-ray spectra. Raman spectra predicted a spinel structure with combined vibrations of tetrahedral site and octahedral oxygen motions in the nanocomposite thin films. The prepared thin films with 1.0 wt% of graphene oxide showed the highest solar absorptance (?? = 89.95), low thermal emittance (?? = 4.6), and highest solar selectivity (?? = 19.55). These values indicated that the nanocomposite thin film samples can be ideal candidates for solar thermal energy gadgets.
Article
Physics, Condensed Matter
N. Murugesan, S. Suresh, M. Kandasamy, S. Murugesan, N. Pugazhenthiran, V. Prasanna Venkatesh, B. K. Balachandar, S. Karthick Kumar, M. N. M. Ansari
Summary: In this study, reduced graphene oxide integrated copper oxide nanocomposite thin film solar selective absorber coatings were successfully prepared on aluminum substrate using dip-coating method. The coatings were characterized and analyzed in detail. The results showed that the coatings had highly crystalline monoclinic structured CuO particles distributed on graphene sheets, exhibiting high absorptance and low emittance, indicating promising solar absorption performance.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Multidisciplinary
S. Suresh, M. Kandasamy, S. Karthick Kumar, N. Pugazhenthiran
Summary: Dye-sensitized solar cells (DSSCs) with TiO2 nanoparticles calcinated at different temperatures were studied. The band gaps of TiO2 nanoparticles calcinated at higher temperatures were shifted to lower energy levels. DSSCs with TiO2 (Degussa P25) nanoparticles photoanode showed higher efficiency compared to those with TiO2 nanoparticles calcinated at lower temperatures, which could be attributed to the higher surface area of TiO2 nanoparticles and the predominant anatase phase. The stability of DSSCs was confirmed through chronoamperometry experiments.
RESULTS IN CHEMISTRY
(2023)
Article
Chemistry, Physical
S. Thambidurai, J. Arumugam, M. Kandasamy, D. Balaji, N. Pugazhenthiran, R. Jothilakshmi, B. Sathish Kumar, K. Murugesan, S. Karthick Kumar, T. Muneeswaran, K. Jayakumar, S. Suresh
Summary: A green and facile method was used to synthesize copper oxide nanostructures using plant extracts. The CuO nanostructures showed enhanced antibacterial activity, especially the hierarchical CuO nanoparticles/nanorods with smaller size.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
S. Kanimozhi, S. Suresh, S. Thambidurai, N. Suresh, K. M. Prabu
Summary: In this study, zinc oxide-tin oxide nanocomposites were synthesized using a co-precipitation method by varying the molar proportion of precursor salts. Structural, optical, morphological, and elemental features of the nanocomposites were investigated using XRD, UV-Vis spectrophotometer, SEM, and EDAX. The results showed that the nanocomposites exhibited diffraction patterns corresponding to hexagonal wurtzite ZnO and tetragonal rutile SnO2, and had visible light absorption due to the presence of SnO2. Dye-sensitized solar cells integrated with the nanocomposites showed significant variations in photovoltaic parameters, which were influenced by their band gap and morphology.
RESULTS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
S. Venkatesan, S. Suresh, P. Ramu, J. Arumugam, S. Thambidurai, N. Pugazhenthiran
Summary: Ecofriendly synthesis of ZnO nanoparticles with high photocatalytic performance was achieved by using S. trilobatum leaf extract as a bioreducing agent. This method offers environmental sustainability and has potential applications in environmental remediation.
RESULTS IN CHEMISTRY
(2022)
Article
Physics, Multidisciplinary
M. Kandasamy, S. Murugesan, Mohammed M. Alam, M. Selvaraj
Summary: The effect of calcination temperature on the phase stability and morphological change of solvothermally synthesized mesoporous anatase microspheres has been investigated. The dye-sensitized solar cell with anatase TiO2 microspheres as photoanode shows good photovoltaic performance, but calcination above 900 °C reduces the efficiency. IPCE studies reveal that the microspheres calcined at 700 °C have high IPCE due to the high dye loading attributed to their high surface area and porous structure.
INDIAN JOURNAL OF PURE & APPLIED PHYSICS
(2022)