@article { author = {Fattahi, Farnaz Sadat and Zamani, Tahereh}, title = {Synthesis of Polylactic Acid Nanoparticles for the Novel Biomedical Applications: A Scientific Perspective}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {1-13}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.001}, abstract = {Nanotechnology is an extended investigation field, based on the materials including a size ranging 1-1000 nm.. Numerous polymers are used for the production of nanoparticles. Polylactic acid (PLA), its streo-isomers, such as PLLA and PLDA, and  its famous co-polymer polylactic-co-glycolic (PLGA) are among the biocompatible synthetic polymers widely used to produce nanoparticles. These chmeicals are of particular impotance, beacuse they are biocompatible and biodegradable, despite their synthetic nature. A biodegradable polymer is a polymer which is submitted to the degrading procedures in-vivo. The polymeric nanoparticles commonly propose an extended surface area, high drug loading capability, feasibility of functionalization with ligands, controlled drug releasing capacity, minimal toxicity, biocompatibility, storage stability, and flexibility in the management methods. Furthermore, these nanostructure materials signify unique groundbreaking non-invasive methods for delivery structures in biomedical fields such as wound dressing materials, tissue scaffolds, gene-delivery materials, and drug delivery systems for cancer chemo-therapy.}, keywords = {Polylactic Acid,Nanoparticle,Synthesis,Emulsification evaporation,Biomedical}, url = {http://www.nanochemres.org/article_110491.html}, eprint = {http://www.nanochemres.org/article_110491_13d8841bc218dedbb82ce8d84317653c.pdf} } @article { author = {Foorginezhad, Sahar and Zerafat, Mohammad}, title = {Preparation of Highly Crystalline Octavinyl Silsesquioxane Building Blocks via Sol-Gel Technique}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {14-24}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.002}, abstract = {Polyhedral oligomeric silsesquioxanes (POSSs) are a class of hybrid materials with a unique structure and properties originated from a combination of organic functional groups and inorganic silica core. Not well-defined synthesis process generally suffers from multistep, complex and especially time-consuming procedure from days to weeks and months. Consequently, in the present study, the effect of various parameters on the synthesis of octavinyl POSS (OV-POSS) nanostructure such as temperature, monomer concentration, reaction time, and rate of monomer addition are investigated. Finally, OV-POSS crystallization is produced under optimal condition through single-step hydrolytic condensation of vinyltrimethoxysilane (VTMS) with 72% yield and a high crystallinity (above 90%) during a reduced time interval of 5 h at 60 °C at a 20 μl.min-1 monomer addition rate. Morphology and size of the as-prepared samples are characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analyses. Also, the chemical structure is predicted using nuclear magnetic resonance (NMR), FTIR, and EDX.}, keywords = {Polyhedral Oligomeric Silsesquioxanes (POSS),Silsesquioxane,Nanostructure,Crystalline,Vinyltrimethoxysilane}, url = {http://www.nanochemres.org/article_110496.html}, eprint = {http://www.nanochemres.org/article_110496_5c6f8f96ea4ae436c2337e898bbfb6d7.pdf} } @article { author = {Shahbazi-Alavi, Hossein and Safaei-Ghomi, Javad and Esfandiari, Mozhgan}, title = {CeO2/CuO@N-GQDs@NH2 nanocomposite as a reusable and efficient catalyst for the synthesis of piperidines}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {25-34}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.003}, abstract = {An efficient pseudo six-component synthesis of bis-spiropiperidinesis presented by one-pot condensation of formaldehyde, aromatic amine and dimedone or N,N-dimethyl-barbituric acid using CeO2/CuO@N-GQDs@NH2 nanocomposite at room temperature. The catalyst has been characterized by SEM, FT-IR, XRD, EDS, TGA, BET, VSM and XPS. Atom economy, reusable catalyst, low catalyst loading, applicability to a wide range of substrates and high yields of products are some of the notable features of this method.}, keywords = {Graphene quantum dots, Nanocomposite, Nanocatalyst,Piperidines}, url = {http://www.nanochemres.org/article_110632.html}, eprint = {http://www.nanochemres.org/article_110632_464a3d7e6997cbd7d49ec61280c8c5d5.pdf} } @article { author = {Gheisari Dehsheikh, Hassan and Karamian, Ebrahim}, title = {Survey and Investigation of Nanostructure Hardystonite/Biphasic Calcium Phosphate to Use in Biomedical Engineering}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {35-45}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.004}, abstract = {The development of structures serving as scaffolds to fill bone defects, and promote bone regeneration is of a particular importance in bone tissue engineering. In this study, highly porous (≈75%) nanostructured hardystonite/biphasic calcium phosphate scaffolds (BCPS) with interconnected porosity were developed using various hardystonite contents via the space holder technique. Transmission electron microscopy (TEM), X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques were employed to evaluate different samples. In addition, the role of scaffold composition on the mechanical performance, bioactivity and biodegradability was studied. The results showed that the scaffolds produced have an average pore size of 350 nm and a density between  2.2 ± 0.4 and 1.7 ± 0.2 gr/cm3, depending on the hardystonite  contents. Furthermore, increasing the hardystonite  content of scaffolds from 0 (control) to 30 wt. % enhanced the bioactivity test, biodegradability, and compressive strength from 1.1 ± 0.1 to 3.1 ± 0.2 MPa, respectively. Our project suggests that nanostructured hardystonite/BCPS with improved biological and mechanical properties could potentially be used for biomedical engineering such as bone tissue engineering application.}, keywords = {Nanostructure,Hardystonite,calcium phosphate,In vitro,TEM,SEM}, url = {http://www.nanochemres.org/article_110631.html}, eprint = {http://www.nanochemres.org/article_110631_6817ce148ee729f7808f3c267e46feca.pdf} } @article { author = {Riazian, Mehran}, title = {Photocatalytic Activity and Nano Structural Investigation on Co3O4 Nanoparticles}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {46-58}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.005}, abstract = {In this study, Co3O4 nanostructure is synthesized from the Co(NO3)2.6H2O reactant through  co-precipitation technique, and then is calcined at different calcination temperatures (CTs).The XRD peak broadening and its corresponding properties, such as lattice stress, dislocation density, X-ray density, specific area of cubic Co3O4 nanocrystallites, and deformation energy density are analyzed using uniform deformation model (UDM), uniform deformation stress model (UDSM), uniform deformation energy density model (UDEDM), and size-strain plot (SSP) method. Based on the XRD results, the strain of the nanocrystallites increases with the increase of CT. The lattice, structural properties, and morphology of the nanoparticles (NPs) during the CT are studied. NPs calcined at 700 oC show the most lattice strain, stress, and deformation energy, and the least X-ray density and specific area. The photocatalytic activity of Co3O4 (NPs) is specified by the decoloration of methylene blue (MB). Based on the results, the Co3O4 NPs calcined at 700 oC show the most photocatalytic activity. Furthermore, the activation energy of NPs, surface topography, pore size distribution, specific surface area, and crystallization of phases, during thermal treatment, are investigated by the BJH and BET methods. }, keywords = {Photocatalytic activity,N2 adsorption-desorption,Nanostructure,Co3O4}, url = {http://www.nanochemres.org/article_111519.html}, eprint = {http://www.nanochemres.org/article_111519_8945618b17a00001f8a3b1b9b8d19d13.pdf} } @article { author = {Hajiashrafi, Taraneh and Salehi, Shiva}, title = {Dysprosium-Organic Framework as Heterogeneous Lewis acid Catalysis for Sulfide Oxidation and as precursor for synthesis of Dy2O3}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {59-68}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.006}, abstract = {Metal-organic frameworks (MOFs) are a class of hybrid porous materials made up of inorganic clusters connected with organic linkers, offering many opportunities for applications in different areas from catalysis to magnetism. A Dysprosium-organic framework was prepared by a hydrothermal reaction. The prepared MOF was characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), Brunauer−Emmett−Teller (BET) surface area analysis and X-ray powder diffraction (XRD). Herein, Dy-MOF was used as a Lewis acid heterogeneous catalyst for sulfoxidation and as a precursor for the formation of micro-scale Dy2O3 particles. Based on the spectroscopic and microscopic analysis, Dy-MOF can catalyze the sulfide oxidation reaction to sulfoxide and the framework remains intact after the catalytic reaction. Also, the crystals of Dy-MOF turn into particles of Dy2O3 when heated at 650 °C in the air . This result suggests an approach for the formation of dysprosium oxide with  a well-defined (uniform) morphology.  }, keywords = {Metal-organic framework,sulfoxidation,lanthanide oxide particles}, url = {http://www.nanochemres.org/article_111537.html}, eprint = {http://www.nanochemres.org/article_111537_7936538361b80e879ddd328320134ce6.pdf} } @article { author = {Taghavi Fardood, Saeid and Moradnia, Ferzaneh and Ghalaichi, Amir Hossein and Danesh Pajouh, Shokoofeh and Heidari, Maryam}, title = {Facile green synthesis and characterization of zinc oxide nanoparticles using tragacanth gel: investigation of their photocatalytic performance for dye degradation under visible light irradiation}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {69-76}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.007}, abstract = {In this work, zinc oxide nanoparticles have been synthesized via the green and easy sol-gel method. Then, they have been characterized by Fourier transforms infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), UV-Visible Diffuse Reflectance spectroscopy (DRS), transmission electron microscope (TEM), field emission scanning electron microscopy (FESEM), and Brunauer Emmett Teller (BET) analysis. The XRD result showed that ZnO nanoparticles have a hexagonal phase structure with an average crystallite size of 18 nm. The TEM results revealed the nanoparticles size of about 25-35 nm with spherical morphology. The Tauc theory was used to calculate the optical band gap which was found to be 3.03 eV. BET analysis displayed that the specific surface area of the ZnO NPs was 15.87 m2/g. The impact of various parameters such as catalyst dosage, dye concentration, visible light irradiation and time were evaluated in dye degradation. The ZnO NPs shown high photocatalytic performance for degradation of malachite green dye at room temperature in aqueous solution so that 92% of malachite green (MG) was degraded in 90 min.}, keywords = {Zinc oxide,Green synthesis,Tragacanth gel,Malachite Green Dye,Photocatalytic activity}, url = {http://www.nanochemres.org/article_114525.html}, eprint = {http://www.nanochemres.org/article_114525_010ee81ac8658444963281dae7e4a7ee.pdf} } @article { author = {َhmadizadegan, Hashem and Esmaielzadeh, Sheida}, title = {Novel high performance mixed matrix nanocomposites membranes: its structural, morphology, thermal stabilities, mechanical properties, gas permeation and gas selectivity studies}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {77-93}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.008}, abstract = {Modified LDHs particles, including LDH-amino benzoate (M-LDHs) nanoparticles with the intercalated amino benzoate in the interlayer galleries are well exfoliated and show excellent compatibility in the polyimide (PI) matrix. Using FT-IR spectroscopy, X-ray diffraction (XRD), FE-SEM, and electron microscopy (TEM), we confirmed that M-LDHs/PI nanocomposites were successfully synthesized. PI hybrid films with different contents of M-LDHs nanoparticles (0, 3, 5 and 7 wt%) were compared in terms of their morphologies, thermal properties, and gas permeation and selectivity properties. We used TEM to evaluate the degree of intercalation and the amount of aggregation of the M-LDHs nanoparticles. The M-LDHs nanoparticles, for the most part, were well dispersed in the polymer matrix. Moreover, the addition of only a small amount of LDHs particles was enough to improve the thermal stabilities and mechanical properties of PI hybrid films. The thermo-optical properties were measured by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and ultraviolet-visible (UV–Vis) spectrometry. As anticipated, though the gas permeability of pure gases, such as He, N2, CH4 and CO2 exhibited a decrease, it was not monotonous. A marked decrease in permeability of gases such as CO2 and CH4, in comparison to relatively lower decrease in permeability of He, was observed, especially at higher LDH loading. An increase in selectivity: α(He/CO2) and α(He/CH4), especially at higher LDH loading indicated the capability of nanocomposites to tune the selectivity favorably.}, keywords = {Polyimide,Nanocomposites,Modified LDHs,Coprecipitation}, url = {http://www.nanochemres.org/article_113668.html}, eprint = {http://www.nanochemres.org/article_113668_72af3ff2def4e42bec93244a34e5f480.pdf} } @article { author = {Abdul Rasol Albayati, Shahad and Kashanian, Soheila and Nazari, Maryam and Dabirian, Saba}, title = {A Novel Laccase Immobilization Approach Using Simultaneously Electrodeposition of 3, 4-Ethylenedioxythiophene, Gold Nanoparticles and Functionalized Multi-Walled Carbon Nanotube to Detect Catechol}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {94-103}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.009}, abstract = {Laccases are phenoloxidases, that can oxide phenolics. Catechol (1,2-dihydroxybenze) is one of the phenolics that is broadly utilized in various industries. Nanomaterials and conductive polymers can be utilized as a support medium for the laccase immobilization and phenolic biosensors. This paper describes a new enzymatic biosensor being developed to determine phenols such as catechol and showed the laccase catalytic reaction in the presence of phenolic substrates. It is based on the glassy carbon electrode fabricated with electrodepositing of poly (3,4-ethylenedioxythiophene) (PEDOT), carboxyl group functionalized multi-walled carbon nanotube (MWCNTCOOH), and gold nanoparticles in combination, thereafter immobilizing of the laccase on the electropolymerized material on the electrode surface using the covalent binding of laccase to MWCNTCOOH. The simply fabricated laccase biosensor response was characterized via voltammetry techniques and Fourier transform infrared (FTIR) spectroscopy. Using differential pulse voltammetry (DPV), the biosensor results indicated that the detection limit, sensitivity, and linear range are 0.35 M, 3.52 A mM-1, 1 – 4 M respectively, as well as the correlation coefficient of 0.95 under optimal conditions. By investigation of scan rate effect on cyclic voltammograms of laccase biosensor, transfer coefficient (α) and standard heterogeneous rate constant (ks) were estimated to be 0.68 and 0.083 s-1. The proposed biosensor incorporates the pleasant electrocatalytic properties of nanomaterials with the PEDOT properties to decrease the oxidation potential and improve the electron transfer rate and demonstrate a low detection limit and high sensitivity.}, keywords = {Biosensor,PEDOT,MWCNT,Laccase,Catechol}, url = {http://www.nanochemres.org/article_114526.html}, eprint = {http://www.nanochemres.org/article_114526_ba4e2579b931b8c947c9d62e81f76b56.pdf} } @article { author = {Tahmasebi zade Damirchi, إehnam and Rostami Charati, Faramarz and Akbari, Reza and Daneshvar, Abolfazl}, title = {Green synthesis of silver nanoparticles using the aqueous extract of Viscum album Fruit}, journal = {Nanochemistry Research}, volume = {5}, number = {1}, pages = {104-110}, year = {2020}, publisher = {Iranian Chemical Society}, issn = {2538-4279}, eissn = {2423-818X}, doi = {10.22036/ncr.2020.01.010}, abstract = {The nanoparticles were called nanoparticles on a scale of 1–100 nm. In addition to the composition and structure of the material, it is also one of the factors affecting the properties of materials. Nowadays, green chemistry and its benefits are stimulating researchers' interest in the environmental biosynthesis of metallic nanoparticles. In this study, a rapid, simple and green method for the synthesis of silver nanoparticles was prepared using aqueous extract of viscose album. The synthesized silver nanoparticles were characterized using UV-Vis spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) methods. The results of SEM, XRD and UV-Vis techniques confirm the synthesis and formation of uniform and spherical shape of silver nanoparticles with average particle size of about 40-70 nm. The aqueous extract of Viscom album demonstrates the strong potential for reducing silver ions and producing silver nanoparticles using a highly cost-effective, clean, non-toxic, eco-friendly method that can be produced on a large scale. Silver synthesis with aqueous extract of tree parasite was first studied in this study.}, keywords = {Key words: Green Synthesis,Silver nanoparticles,Fruit Viscum album extract,Spectroscopy}, url = {http://www.nanochemres.org/article_114527.html}, eprint = {http://www.nanochemres.org/article_114527_f9dc56d713221d6c2abfbee309c87ad4.pdf} }