Article
Spectroscopy
Abdolraouf Samadi-Maybodi, Reza Tirbandpay
Summary: This study synthesized cadmium selenium quantum dots (CdSe QDs) using different capping agents and investigated their effects on nucleation and particle growth processes. Characterization techniques such as SEM, EDX, XRD, and FTIR were used to analyze the samples. Results showed that the choice of capping agent significantly influenced the size and fluorescence spectra of the CdSe QDs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Materials Science, Multidisciplinary
Lin -Song Li, Zhi-Qiang Zhang, Yanbin Zhang, Yong-Fang Liu, Mei-Xia Zhao
Summary: In this study, the research team developed a CdSe/ZnS quantum dot nano-drug delivery system that efficiently inhibited the proliferation of various cancer cells. The system exerted anti-cancer effects through the regulation of reactive oxygen species and protein expression, and showed promising therapeutic efficacy and biosafety in a mouse model.
MATERIALS & DESIGN
(2022)
Article
Engineering, Electrical & Electronic
Samiran Mandal, Sk Irsad Ali, Subhamay Pramanik, Atis Chandra Mandal, Prosenjit Ghosh
Summary: Nanocrystalline samples of capped zinc sulphide were synthesized using the sol-gel technique, and the nanocrystallinity and optical properties of the samples were characterized. The size of the nanoparticles was found to decrease with increasing concentration of the capping agent, as confirmed by X-ray diffraction and transmission electron microscopy. The optical band gap values were estimated using ultraviolet-visible spectroscopy, and the samples showed quantum confinement behavior. The fluorescence spectra exhibited specific emission peaks, with intensities proportional to the concentration of the capping agent.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Jingling Li, Haixin Zheng, Ziming Zheng, Haibo Rong, Zhidong Zeng, Hui Zeng
Summary: In this work, the crystalline structure of CdSe was successfully tuned by adjusting the precursor concentration and the dosage of tributyl phosphine. Core-shell quantum dots with different shell thicknesses were prepared by using TBP-assisted thermal-cycling technique. The addition of TBP improved the isotropic growth of the shell, resulting in high quantum yield and single-channel decay characteristic of CdSe/ZnS quantum dots. This study not only provides a facile synthesis route for controlling the core-shell structures and fluorescence properties of CdSe nanocrystals but also establishes a connection between ligand chemistry and crystal growth theory.
Review
Polymer Science
Cesar A. Barbero, Diego F. Acevedo
Summary: This review discusses the mechanochemical synthesis of polyanilines (PANIs) through oxidative polymerization of anilines. The effects of different parameters on the properties of conducting polymers are analyzed, including molecular weight, degradation, doping/oxidation level, conductivity, and nanostructure. The production of acids during polymerization and the comparison of PANI nanostructures made by mechanochemical polymerization (MCP) and solution are also investigated. The extensive work on the production of nanocomposites by MCP of anilines together with different nanomaterials is described.
Article
Polymer Science
Helena Vilaca, Andre Carvalho, Tarsila Castro, Elisabete M. S. Castanheira, Loic Hilliou, Ian Hamley, Manuel Melle-Franco, Paula M. T. Ferreira, Jose A. Martins
Summary: Self-assembled peptide-based hydrogels have a wide range of applications in nanomedicine and biomaterials. This study reports the synthesis of a library of dehydrodipeptides protected with 1-naphthoyl and 2-naphthylacetyl groups, and demonstrates that the 1-naphthoyl group can lead to stronger and lower concentration hydrogels compared to the 2-naphthylacetyl group.
Article
Chemistry, Physical
Jiakuan Zhang, Chuyue Li, Jiongzhao Li, Xiaogang Peng
Summary: Size- and shape-controlled CdSe/ZnSe core/shell and CdSe/ZnSe/ZnS core/shell/shell nanocrystals with zinc-blende structure are synthesized. The ligand strain between the inorganic crystal surface and organic ligands plays a key role in ZnSe epitaxy. The lattice strain between the CdSe and ZnSe affects the photoluminescence of CdSe/ZnSe/ZnS core/shell/shell QDs.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Composites
Zhen Li, Dan Jin, Zhenghua Wang
Summary: In this study, In2Se3/CdSe nanocomposites were successfully synthesized and displayed enhanced photocatalytic hydrogen production compared to In2Se3 and CdSe due to their good visible-light absorption ability and the formation of a step-scheme heterojunction. The improved separation of photogenerated electrons and holes in the step-scheme heterojunction significantly enhanced the photocatalytic activity of the photocatalysts, providing a feasible method for constructing a step-scheme photocatalyst for hydrogen production.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Erika Dutkova, Zdenka Lukacova Bujnakova, Oleh Sphotyuk, Jana Jakubikova, Danka Cholujova, Viera Siskova, Nina Daneu, Matej Balaz, Jaroslav Kovac, Jaroslav Kovac, Jaroslav Briancin, Pavlo Demchenko
Summary: In this study, CuInSe2/ZnS multiparticulate nanocomposites were synthesized using a two-step mechanochemical synthesis method. The stability of the prepared nanosuspensions was effectively achieved through sodium dodecyl sulphate capping, as confirmed by zeta potential measurements.
Article
Engineering, Electrical & Electronic
Anju Bala, Rajeev Sehrawat, Anil Kumar Sharma, Pardeep Soni
Summary: Polythiophene-capped Mn-doped ZnS quantum dots were prepared through a chemical method and characterized using various techniques. The results showed stable particle sizes and weak agglomeration in the capped ZnS/Mn quantum dots.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Analytical
Quanxiu Zhou, Zhaofa Li, Qunfang Wang, Liang Peng, Shihe Luo, Feng Long Gu
Summary: In this study, poly(styrene-co-maleic anhydride)-capped CdSe/ZnS quantum dots aminolyzed with ethanolamine were proposed as fluorescent probes for the detection of Cu2+ and Hg2+, with different quenching mechanisms discussed. The coordination abilities of the surface polymer of CdSe/ZnS QDs and the two metal ions were calculated using density functional theory. The probes showed high sensitivity to both Cu2+ and Hg2+, with fast response times and the ability to detect the ions within minutes.
ANALYTICAL METHODS
(2021)
Article
Chemistry, Multidisciplinary
Cinu Winson, Sunil Varughese
Summary: In this study, the multicomponent systems of the antibacterial drug linezolid (LZD) with other drug compounds were screened using complementary experimental and computational methods. Mechanochemical synthesis was used to attempt twelve combinations, resulting in seven drug-drug eutectics and the remaining physical mixtures. The pure eutectic compositions were determined for these seven composites, and their heterogeneous crystalline arrangements contributed to increased thermodynamic functions. Mechanochemical synthesis of drug-drug eutectics offers promising applications in drug manufacturing without altering crystallinity or causing chemical disintegration.
Article
Optics
N. Hnainia, M. Elain Hajlaoui, A. Benchaabane, Z. Gouid, M. A. Sanhoury, A. Zeinert, Radhouan Chtourou
Summary: The study focuses on incorporating CdSe nanoparticles in a P3HT polymer matrix to enhance the performance of hybrid solar devices, by varying capping agents on top of CdSe NPs for each active layer sample. Optical properties of BHJ P3HT:CdSe cells with different capping agents were investigated, and various parameters were determined using theoretical models.
Article
Materials Science, Ceramics
Alireza Shabanzadeh-Kouyakhi
Summary: This study successfully synthesized gadolinium oxide nanoparticles through a multi-stage processing method and enhanced their biocompatibility through surface modification and encapsulation. Experimental results showed that different synthesis parameters affected the size, structure, and magnetic properties of Gd2O3 nanoparticles.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Gilma Granados-Oliveros, Brayan Stiven Gomez Pineros, Fredy Giovany Ortiz Calderon
Summary: Two structures of CdSe/ZnS quantum dots with different solubility properties were prepared and characterized. They were used as fluorescent probes to detect Hg2+ ions. The optical properties of the quantum dots were studied, and their solubility properties were compared. The results showed that both structures of quantum dots exhibited high selectivity and sensitivity for Hg2+ ions.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Article
Chemistry, Multidisciplinary
Erika Tothova, Andre Duevel, Ralf Witte, Richard A. Brand, Abhishek Sarkar, Robert Kruk, Mamoru Senna, Klebson Lucenildo Da Silva, Dirk Menzel, Vladimir Girman, Michal Hegedus, Matej Balaz, Petre Makreski, Shiro Kubuki, Maria Kanuchova, Jan Valicek, Horst Hahn, Vladimir Sepelak
Summary: This study demonstrates the mechanosynthesis of Sr2FeMoO6 nanostructured powders at ambient temperature without the need for solvents and controlled oxygen fugacity. Spectroscopic and electron microscopy observations reveal the nanostructured nature and high degree of anti-site disorder. Furthermore, the mechanosynthesized Sr2FeMoO6 nanoparticles exhibit superparamagnetism.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Martin Stahorsky, Zdenka Lukacova Bujnakova, Erika Dutkova, Martin Kello, Bohdan Mahlovanyi, Yaroslav Shpotyuk, Nina Daneu, Jelena Trajic, Matej Balaz
Summary: The biocompatible nanosuspension of CuS nanoparticles using BSA as a capping agent was prepared via a two-stage mechanochemical approach. The stability, adsorption behavior, and biological activity of the nanosuspension were investigated.
FRONTIERS IN CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Matej Balaz, Mariano Casas-Luna, Adrian Augustinyak, L'udmila Tkacikova, Kamil Szmuc, Maria Kovacova, Ladislav Celko, Yaroslav Shpotyuk
Summary: This study successfully prepared silver carbonate and elemental silver nanoparticles embedded in the matrix of biological materials using a solvent-free method. The optimized nanoparticles had a size of up to 15 nm and exhibited antibacterial activity. Different combinations of reducing agents showed varying inhibition effects against different bacteria.
APPLIED NANOSCIENCE
(2022)
Article
Plant Sciences
Dajana Rucova, Tamara Dordevic, Matej Balaz, Marieluise Weidinger, Ingeborg Lang, Andrej Gajdos, Michal Goga
Summary: Lichens are symbiotic organisms that can colonize extreme climate and heavily contaminated areas. They have developed mechanisms to overcome the toxicity of metals, including binding metal cations and forming calcium oxalate. Calcium plays an important role in lichens and the localization of calcium oxalate formation varies among different species and parts of the thallus.
Article
Chemistry, Multidisciplinary
Matej Balaz, L'udmila Tkacikova, Martin Stahorsky, Mariano Casas-Luna, Erika Dutkova, Ladislav Celko, Maria Kovacova, Marcela Achimovicova, Peter Balaz
Summary: This research presents twelve Cu-based nanocrystalline sulfides as prospective antibacterial materials. The materials were synthesized through solvent-free mechanochemical synthesis and showed good antibacterial activity. The presented synthetic approach offers a promising alternative for the preparation of nanomaterials for biological applications and highlights ternary and quaternary sulfides as potential candidates for the next-generation antibacterial agents.
Article
Chemistry, Physical
Natalya Khan, Matej Balaz, Mukhambetkali Burkitbayev, Batukhan Tatykayev, Zhandos Shalabayev, Renata Nemkayeva, Ardak Jumagaziyeva, Almagul Niyazbayeva, Islam Rakhimbek, Askhat Beldeubayev, Farit Urakaev
Summary: Microstructures with different content of sulfur and silver halides were successfully synthesized using the DMSO-mediated solvothermal synthesis method. The presence of S and AgX phases was confirmed by XRD and Raman analysis. The obtained microstructures exhibited low specific surface area and showed photocatalytic and antimicrobial activities.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
T. Sopcak, L. Medvecky, P. Jevinova, M. Giretova, A. Mahun, L. Kobera, R. Stulajterova, F. Kromka, V. Girman, M. Balaz
Summary: In recent years, there has been an increasing interest in developing more reactive calcium silicate cements (CSCs) that possess superior bioactivity, self-setting properties, and mechanical strength for various dental applications. This study successfully produced a biphasic larnite/bredigite calcium magnesium silicate cement (CaMgSi) with improved properties by incorporating boron (B) in different amounts. The result showed enhanced hydration, self-setting, mechanical strength, and antibacterial activity of the boron-modified CaMgSi cements, making them promising for potential use in dentistry.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
M. Streckova, O. Petrus, A. Guboova, R. Orinakova, V. Girman, C. Bera, M. Batkova, M. Balaz, J. Shepa, J. Dusza
Summary: This study evaluated the effectiveness of nanoscale NiCoP bimetallic phosphide particles incorporated into carbon fibers (CF) and found them to be the most active materials suitable for alkaline and proton exchange membrane electrolysis environments. NiCoP CF showed high electrocatalytic activity and has potential for practical application in water electrolysis energy conversion processes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Erika Tothova, Robert Tarasenko, Vladimir Tkac, Martin Orendac, Matej Balaz, Mamoru Senna, Shiro Kubuki, Masashi Takahashi, Peter Svec, Peter Svec, Vladimir Girman
Summary: A simple one-step mechanically induced route was used to synthesize Gd2MoO6 with a disordered structure. The elemental analysis confirmed a homogeneous distribution of Gd, Mo, and O. Gd-155 Mossbauer spectroscopy provided information about the local structure of GMO. The simplified synthesis method resulted in GMO with excellent magnetic properties.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Physical
Erika Dutkova, Matej Balaz, Nina Daneu, Batukhan Tatykayev, Yordanka Karakirova, Nikolay Velinov, Nina Kostova, Jaroslav Briancin, Peter Balaz
Summary: CuFeS2/TiO2 nanocomposite with enhanced visible-light-driven photocatalytic efficiency in Methyl Orange azo dye decolorization was prepared by a simple and low-cost mechanochemical route. The nanocomposite exhibited good structural and microstructural characteristics, as well as strong absorption in the visible range. This study showed the possibility of developing environmentally friendly nanocomposite materials for efficient visible-light photocatalysis.
Article
Chemistry, Physical
Matej Balaz, Adrian Augustyniak, Batukhan Tatykayev, Zhandos Shalabayev, Gairat Burashev, Erika Dutkova, Nina Daneu, Jaroslav Briancin, Ludmila Balazova, Ludmila Tkacikova, Martin Stahorsky, Marcela Achimovicova, Peter Balaz
Summary: This study successfully prepared CuxSy compounds using mechanochemistry and obtained high purity covellite, chalcocite, and digenite phases, as well as their mixtures. The preparation of digenite required a specific stoichiometric ratio and a longer milling process. The obtained products showed efficient photocatalytic activity under visible light and retained their antibacterial properties against bacterial cells.
FARADAY DISCUSSIONS
(2023)
Article
Biochemistry & Molecular Biology
Erika Dutkova, Maria Jesus Sayagues, Martin Fabian, Matej Balaz, Jaroslav Kovac, Jaroslav Kovac Junior, Martin Stahorsky, Marcela Achimovicova, Zdenka Lukacova Bujnakova
Summary: Copper, antimony, and sulfur were used to synthesize skinnerite (Cu3SbS3) through mechanochemical synthesis in laboratory and industrial mills. XRD analysis confirmed the formation of pure monoclinic skinnerite in the laboratory mill and a mixture of skinnerite, famatinite, and tetrahedrite in the industrial mill. The resulting nanocrystals were agglomerated into micrometer-sized grains. Optical and optoelectrical properties of the skinnerite prepared in the laboratory mill showed potential for photovoltaic applications.
Article
Crystallography
Erika Dutkova, Matej Balaz, Maria Jesus Sayagues, Jaroslav Kovac, Jaroslav Kovac
Summary: Ternary wittichenite Cu3BiS3 nanocrystals were synthesized in only 5 min by mechanochemical method. The nanocrystals showed orthorhombic structure with an average crystallite size of about 38 nm. The UV-Vis absorption spectrum revealed a bandgap energy of 1.52 eV, indicating their potential application in photovoltaic devices.
