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Tuning the crystal structure and optical properties of selective area grown InGaAs nanowires

Nano Research 2022年第4期15卷 3695-3703页

作者： zahra Azimi Aswani Gopakumar Amira SAmeruddin Li Li Thien Truong Hieu TNguyen Hark Hoe Tan Chennupati Jagadish Jennifer Wong-Leung Department of Electronic Materials Engineering Research School of PhysicsThe Australian National UniversityCanberra ACT 2601Australia Faculty of Applied Science and Technology Universiti Tun Hussein Onn MalaysiaBatu Pahat 86400Malaysia Australian National Fabrication Facility ACT Node Research School of PhysicsThe Australian National UniversityCanberra ACT 2601Australia School of Engineering The Australian National UniversityCanberra ACT 2601Australia Australian Research Council Centre of Excellence for Transformative Meta-Optical Systems Research School of PhysicsThe Australian National UniversityCanberra ACT 2601Australia

Catalyst-free InGaAs nanowires grown by selective area epitaxy are promising building blocks for future optoelectronic devices in the infrared spectral *** progress,the role of pattern geometry and growth parameters on the composition,microstructure,and optical properties of InGaAs nanowires is still ***,we present an optimised growth parameter window to achieve highly uniform In1-xGaxAs nanowire arrays on GaAs(111)B substrate over an extensive range of Ga concentrations,from 0.1 to 0.91,by selective-area metal-organic vapor-phase *** observe that the Ga content always increases with decreasing In/(Ga+In)precursor ratio and group V flow rate and increasing growth *** increase in Ga content is supported by a blue shift in the photoluminescence peak *** geometry of the nanowire arrays also plays an important role in the resulting ***,increasing the nanowire pitch size from 0.6 to 2μm in a patterned array shifts the photoluminescence peak emission by up to 120 *** of these growth and geometry parameters,the Ga content determines the crystal structure,resulting in a predominantly wurtzite structure for xGa≤0.3 and a predominantly zinc blende phase for xGa≥*** insights on the factors controlling the composition of InGaAs nanowires grown by a scalable catalyst-free approach provide directions for engineering nanowires as functional components of future optoelectronic devices.

关键词： InGaAs nanowires ternary semiconductors selective-area metal-organic vapor-phase epitaxy nanostructure pattern geometry

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A New Anti-counterfeiting Feature Relying on Invisible Non-toxic Fluorescent Carbon Dots

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Journal of Analysis and Testing 2020年第4期4卷 307-315页

作者： zahra Fatahi Neda Esfandiari zahra Ranjbar Protein Research Center Shahid Beheshti University*** TehranIran Faculty of Life Sciences and Biotechnology Shahid Beheshti University*** TehranIran Faculty of Surface Coatings and Novel Technologies Institute for Color Science and Technology(ICST)*** TehranIran

Fluorescent patterning has attracted a great deal of attention owing to its potential applications in different areas in particular anti-counterfeiting *** carbon dots(CDs)as a type of fluorescent dyes can be used in invisible patterning due to their remarkable optical *** study attempts to introduce green fluorescent CDs as a promising factor in textile ***,a new green source opted to prepare CDs using the hydrothermal ***,toxicity assays were performed to prove the safety of these carbon-based nanoparticles for *** were also conjugated with cotton fiber ***,these green prepared CDs are promising for security labeling in the textile industry.

关键词： Green carbon dots Cytotoxicity Anti-counterfeiting Cotton fiber

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Nut consumption and urogenital and genital,gastrointestinal and women-related cancers:Assessment and review

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Chronic Diseases and Translational Medicine 2023年第4期9卷 277-287页

作者： Maryam Mohamadi Periklis Dousdampanis zahra Ahmadi Soheila Pourmasumi Monavare Naderi Nahid Zainodini Alireza Nazari Occupational Safety and Health Research Center NICICOWorld safety organization and Rafsanjan University of Medical SciencesRafsanjanIran Department of Nephrology Saint Andrews State General HospitalPatrasGreece pistachio Safety Research Center Rafsanjan University of Medical SciencesRafsanjanIran Social Determinants of Health Research Center Rafsanjan University of Medical SciencesRafsanjanIran Clinical Research Development Unit Ali-Ibn Abi-Talib HospitalRafsanjan University of Medical SciencesRafsanjanIran Vice Chancellor for Research and Technology Rafsanjan University of Medical SciencesRafsanjanIran Immunology of Infectious Diseases Research Center Research Institute of Basic Medical SciencesRafsanjan University of Medical SciencesRafsanjanIran Department of Surgery School of MedicineRafsanjan University of Medical SciencesRafsanjanIran

The prevalence of cancer,especially in industrial countries,is a major problem for health and treatment *** can affect the quality of life of all family members and has many negative effects on the *** many advances in cancer treatment,this disease is still a major worldwide *** is strong evidence that dietary habits are effective in protecting against cancer and even helping in the disease treatment *** with various biologically-active compounds,such as vitamins,phytosterols,isoflavones,flavonoids,and polyphenols have been reported to possess anticarcinogenic ***,this review provides an insight into the association between nut consumption and the prevention of some *** considered the cancers related to the urogenital and genital tract,gastrointestinal tract,as well as women-related *** cell culture examinations and experimental animal studies alongside observational epidemiological studies demonstrated that regular consumption of a nut-enriched diet is able to reduce the risk of these cancers.

关键词： bladder breast cervical nut prostate

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Anticonvulsant effects of medicinal plants with emphasis on mechanisms of action

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Asian Pacific Journal of Tropical Biomedicine 2017年第2期7卷 166-172页

作者： zahra Rabiei Medical Plants Research Center Shahrekord University of Medical ScienceShahrekordIran

Epilepsy is a disorder in brain in which clusters of nerve cells, or neurons, occasionally signal abnormally and cause strange emotions, sensations, and behavior, or sometimes muscle spasms, convulsions, and loss of consciousness. Neurotransmitters in central nervous system greatly affect and play a very important part in neuronal *** treatments are still a component of health care system in many communities despite the fact that well-established alternatives are available. In this review article, we addressed epilepsy and its treatments with emphasis on medical plants and introduction of antiepileptic plants and their action mechanisms. Relevant articles published since 2010 were retrieved using the search terms including epileptic seizure, anticonvulsant, medicinal plants, and oxidative stress. Most plants/herbal preparations that are ethnomedically used to treat epilepsy or those which have been tested for anticonvulsant activity were reported. Overall, the results of the published articles show that the symptoms of epilepsy seizure can be inhibited or treated by active ingredients derived from medicinal plants.

关键词： Epileptic seizure Anticonvulsant Medicinal plants Oxidative stress

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Cellulose-based composite scaffolds for bone tissue engineering and localized drug delivery

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Bioactive Materials 2023年第2期20卷 137-163页

作者： Mahsa Janmohammadi zahra Nazemi Amin Orash Mahmoud Salehi Amir Seyfoori Johnson V.John Mohammad Sadegh Nourbakhsh Mohsen Akbari Faculty of New Sciences and Technologies Semnan UniversitySemnanP.O.Box:19111-35131Iran Laboratory for Innovations in Micro Engineering(LiME) Department of Mechanical EngineeringUniversity of Victori1Victori1BCV8P 5C2Canada Terasaki Institute for Biomedical Innovations Los AngelesCA90050USA Biotechnology Center Silesian University of TechnologyAkademicka 2A44-100GliwicePoland Faculty of Materials and Metallurgical Engineering Semnan UniversitySemnanP.O.Box:19111-35131Iran

Natural bone constitutes a complex and organized structure of organic and inorganic components with limited ability to regenerate and restore injured tissues,especially in large bone *** improve the reconstruction of the damaged bones,tissue engineering has been introduced as a promising alternative approach to the conventional therapeutic methods including surgical interventions using allograft and autograft *** composite scaffolds consisting of multifunctional biomaterials in combination with the cells and bioactive therapeutic agents have great promise for bone repair and *** and its derivatives are renewable and biodegradable natural polymers that have shown promising potential in bone tissue engineering ***-based scaffolds possess numerous advantages attributed to their excellent properties of non-toxicity,biocompatibility,biodegradability,availability through renewable resources,and the low cost of preparation and ***,cellulose and its derivatives have been extensively used for delivering growth factors and antibiotics directly to the site of the impaired bone tissue to promote tissue *** review focuses on the various classifications of cellulose-based composite scaffolds utilized in localized bone drug delivery systems and bone regeneration,including cellulose-organic composites,cellulose-inorganic composites,cellulose-organic/inorganic *** will also highlight the physicochemical,mechanical,and biological properties of the different cellulose-based scaffolds for bone tissue engineering applications.

关键词： Cellulose Cellulose derivatives Bone tissue engineering Drug delivery system

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Developing a Support Vector Machine Based QSPR Model to Predict Gas-to-Benzene Solvation Enthalpy of Organic Compounds

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物理化学学报 2017年第5期33卷 918-926页

作者： GOLMOHAMMADI Hassan DASHTBOZORGI zahra KHOOSHECHIN Sajad Young Researchers and Elite Club Yadegar-e-Imam Khomeini (RAH) Shahr-e-Rey Branch Islamic Azad University Young Researchers and Elite Club Central Tehran Branch Islamic Azad University

The purpose of this paper is to present a novel way to building quantitative structure-property relationship(QSPR) models for predicting the gas-to-benzene solvation enthalpy(ΔHSolv) of 158 organic compounds based on molecular descriptors calculated from the structure alone. Different kinds of descriptors were calculated for each compounds using dragon package. The variable selection technique of enhanced replacement method(ERM) was employed to select optimal subset of descriptors. Our investigation reveals that the dependence of physico-chemical properties on solvation enthalpy is a nonlinear observable fact and that ERM method is unable to model the solvation enthalpy accurately. The standard error value of prediction set for support vector machine(SVM) is 1.681 kJ ? mol^(-1) while it is 4.624 kJ ? mol^(-1) for ERM. The results established that the calculated ΔHSolvvalues by SVM were in good agreement with the experimental ones, and the performances of the SVM models were superior to those obtained by ERM one. This indicates that SVM can be used as an alternative modeling tool for QSPR studies.

关键词：数量的结构-财产关系气体-到-苯媒合焓描述符提高了复位成本折旧法支承矢量机器

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Fabrication and Growth Mechanism of Single-crystalline Rutile TiO_2 Nanowires by Liquid-phase Deposition Process in a Porous Alumina Template

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Journal of Materials Science & Technology 2015年第8期31卷 828-833页

作者： Abbas Sadeghzadeh Attar zahra Hassani Department of Metallurgy and Materials Engineering University of Kashan Department of Materials Institute of Science and High Technology and Environmental SciencesGraduate University of Advanced Technology

TiO2 nanowire arrays were successfully fabricated by liquid-phase deposition method using porous alumina templates. The obtained TiO2 nanowires were characterized using Raman spectroscopy, X-ray diffraction （XRD）, scanning electron microscopy （SEM）, field emission scanning electron microscopy （FE- SEM）, transmission electron microscopy （TEM）, and selected area electron diffraction （SAED） analysis. Results of electron microscopic observations indicated that the nanowires were smooth and uniform with a diameter of about 50-80 nm and several micrometers in length. SAED, Raman, and XRD mea- surements showed that TiO2 nanowires were single-crystalline with a pure rutile structure after heating at 800 ~C for 10 h. In this situation, the nanowire constituents grew preferentially along the 〈001〉 direction. Furthermore, the formation process and mechanistic study of the Ti02 nanowire arrays were proposed and discussed in detail. The nanowires are clearly produced by the deposition of TiO2 particles on the inner wall of the template nanochannels.

关键词： TiO2 nanowire arrays Single crystal Rutile phase Liquid-phase deposition process

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Mechanochemical sulfidization of a mixed oxide-sulphide copper ore by co-grinding with sulfur and its effect on the flotation efficiency

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Chinese Journal of Chemical Engineering 2020年第3期28卷 743-748页

作者： Mojtaba Masdarian Asghar Azizi zahra Bahri Faculty of Mining Petroleum and GeophysicsShahrood University of TechnologyShahroodIran Department of Control and Modeling of Mineral Processing Systems Institute of Mineral ProcessingACECR at Tarbiat ModaresTehranIran

Mechanochemical sulfidization of a mixed sulfide/oxide copper ore by co-grinding with sulfur and additives including Mg(NO3)2 and Fe(NO3)3 salts and iron,aluminum and magnesium powders was investigated for the first ***,the influence of sulfidization during the wet-milling process was examined on the separation efficiency and recovery of copper in *** results demonstrated that co-grinding with sulfur solely had the best flotation performance at the value of 0.5 wt.%and it was attributed to the possible existence of S\\O bonding on copper oxides *** addition,adding magnesium nitrate salt,magnesium powder,iron nitrate salt and aluminum powder as additive associated with 0.5 wt%sulfur into ball milling caused the flotation improvement at the amounts of 0.2 wt%,0.2 wt%,0.5 wt%and 0.5 wt%,***,the effect of grinding time and sulfidization pH with 0.5 wt%sulfur solely was determined and pH s of 7.5 to 8.5 gave the best *** highest recovery(75.76%)and separation efficiency(63.44%)were achieved at pH of 7.5 and 8.5,respectively.

关键词： Sulphide/oxide copper ore Floatability Mechanochemical sulfidization Reductive additives Recovery

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The investigation and optimization of drag reduction in turbulent flow of Newtonian fluid passing through horizontal pipelines using functionalized magnetic nanophotocatalysts and lecithin

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Chinese Journal of Chemical Engineering 2020年第1期28卷 63-75页

作者： Nadia Esfandiari Reza Zareinezhad zahra Habibi Department of Chemical Engineering Marvdasht BranchIslamic Azad UniversityMarvdashtIran

The nanophotocatalysts were synthesized in four stages and evaluated by FTIR, FESEM and VSM analysis. The influence of nanofluids containing functionalized magnetic Ti O2 nanophotocatalyst and dipalmitoylphosphatidylcholine lecithin in drag reduction of turbulent flow in four horizontal pipelines was studied. The effective parameters on drag reduction(nanoparticle concentration, surfactant concentration, p H and Re number) were investigated and optimized in each pipeline using response surface method. The drag reduction in 1/2 " galvanized, 3/4" galvanized, 1/2 "five-layer and 1/2" cuprous pipelines was found 99.1%, 92.5%, 87.6% and 85.2%, respectively. The model adequacy was measured using ANOVA. Based on the high determination coefficient, more than 95% of variance of experimental data in all pipelines was described by quadratic model.

关键词： Drag reduction Lecithin Functionalized magnetic nanophotocatalyst Turbulent flow Response surface

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Prediction of Blood-to-Brain Barrier Partitioning of Drugs and Organic Compounds Using a QSPR Approach

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物理化学学报 2017年第6期33卷 1160-1170页

作者： GOLMOHAMMADI Hassan DASHTBOZORGI zahra KHOOSHECHIN Sajad Young Researchers and Elite Club Yadegar-e-Imam Khomeini(RAH)Shahr-e-Rey Branch Islamic Azad University Tehran Iran Young Researchers and Elite Club Central Tehran Branch Islamic Azad University Tehran Iran

The purpose of this study was to develop a quantitative structure–property relationship(QSPR) model based on the enhanced replacement method(ERM) and support vector machine(SVM) to predict the blood-to-brain barrier partitioning behavior(log BB) of various drugs and organic compounds. Different molecular descriptors were calculated using a dragon package to represent the molecular structures of the compounds studied. The enhanced replacement method(ERM) was used to select the variables and construct the SVM model. The correlation coefficient, R^2, between experimental results and predicted log BB was 0.878 and 0.986, respectively. The results obtained demonstrated that, for all compounds, the log BB values estimated by SVM agreed with the experimental data, demonstrating that SVM is an effective method for model development, and can be used as a powerful chemometric tool in QSPR studies.

关键词： Quantitative structure-activity relationship Blood-to-brain barrier partitioning Drug Enhanced replacement method Support vector machine

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