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Open Access Article
1 - Computer simulation of quantum dot formation during heteroepitaxial growth of thin films
Mehran Gholipour Shahraki Esmat Esmaili -
Open Access Article
2 - The impact of AsH3 overflow time and indium composition on the formation of self-assembled InxGa1 − xAs quantum dots studied by atomic force microscopy
Didik Aryanto Zulkafli Othaman Abd Khamim Ismail -
Open Access Article
3 - Synthesis of PbS Functionalized with gelatin as a Fluorescence-Enhanced Sensor for determination of Phenylpropanolamine (PPA) drug in blood and urine samples
Shirin Bouroumand Farzaneh Marahel Fereydoon Khazali -
Open Access Article
4 - The Study of Optical Properties Exciton Based of Molecular Quantum Dot
Ali Mahmoudloo -
Open Access Article
5 - Designed a Fluorescent Method by Using PbS with Gelatin via Quantum Dots for the Determination of Phenylpropanolamine Drug in Human Fluid Samples
Shirin Bouroumand Farzaneh Marahel Fereydoon Khazali -
Open Access Article
6 - Toxicity Comparative of CdSe:ZnS Quantum Dots on Testis, and Liver in Adult Mice
A. Valipoor G.R. Amiri J. Taheri M. Abasi A. Mirzakhani -
Open Access Article
7 - A Computational Study on Lomustine Adsorption on the Surface of Graphene Quantum Dots
Mohammad Reza Jalali Sarvestani Roya AhmadiIn this study, lomustine interaction with graphene quantum dots was evaluated by infrared (IR), natural bond orbital (NBO) and frontier molecular orbital (FMO) computations. The negative values of adsorption energy, enthalpy changes, Gibbs free energy variations showed MoreIn this study, lomustine interaction with graphene quantum dots was evaluated by infrared (IR), natural bond orbital (NBO) and frontier molecular orbital (FMO) computations. The negative values of adsorption energy, enthalpy changes, Gibbs free energy variations showed lomustine adsorption on the surface of graphene quantum dots is exothermic, spontaneous and experimentally feasible. Structural parameters including the energy of HOMO and LUMO orbitals, bandgap, electrophilicity, chemical potential, chemical hardness, density and zero-point energy were also calculated and discussed. The remarkable decrease in bandgap after the lomustine adsorption on the surface of graphene quantum dots demonstrated that the electrochemical conductivity and electrocatalytic properties increased after adsorbate interaction with the adsorbent and graphene quantum dots can be used for construction of new electrochemical sensor in order to lomustine detection and quantitation. In addition, this phenomenon showed lomustine complexes with graphene quantum dots have better reactivity and bioavailability than the pure drug molecule without nanostructure. Manuscript profile -
Open Access Article
8 - A Computational Study on Melphalan Adsorption on the Surface of Graphene Quantum Dots
Mohammad Reza Jalali Sarvestani Roya AhmadiIn this study, Melphalan interaction with graphene quantum dots was evaluated by infra red (IR), natural bond orbital (NBO) and frontier molecular orbital (FMO) computations. The negative values of adsorption energy, enthalpy changes, Gibbs free energy variations showed MoreIn this study, Melphalan interaction with graphene quantum dots was evaluated by infra red (IR), natural bond orbital (NBO) and frontier molecular orbital (FMO) computations. The negative values of adsorption energy, enthalpy changes, Gibbs free energy variations showed melphalan adsorption on the surface of graphene quantum dots is exothermic, spontaneous and experimentally feasible. Structural parameters including the energy of HOMO and LUMO orbitals, bandgap, electrophilicity, chemical potential, chemical hardness, density and zero-point energy were also calculated and discussed. The remarkable decrease in bandgap after the melphalan adsorption on the surface of graphene quantum dots demonstrated that the electrochemical conductivity and electrocatalytic properties increased after adsorbate interaction with the adsorbent and graphene quantum dots can be used for the construction of new electrochemical sensor in order to melphalan detection and quantitation. The remarkable decrease in bandgap after the melphalan adsorption on the surface of graphene quantum dots demonstrated that the electrochemical conductivity and electrocatalytic properties increased after adsorbate interaction with the adsorbent and graphene quantum dots can be used for the construction of new electrochemical sensor in order to melphalan detection and quantitation. Manuscript profile -
Open Access Article
9 - Polypyrrole-Graphene Quantum dots Nanocomposite Layer for Detection of Uric Acid Using Plasmonic Sensor
Amir Reza Sadrolhosseini Seyedeh Mehri Hamidi -
Open Access Article
10 - Synthesis, characterization and application of graphene oxide, graphene oxide quantum dots and graphene quantum dots in photoelectrochemical sensors
Nasrin Ahmadi Ali Nemati Mojtaba Bagherzadeh -
Open Access Article
11 - Relativistic Modification of the Exciton’s mass in Monolayer TMDCs Materials
Arezu Jahanshir -
Open Access Article
12 - Cuprous oxide nanocubes functionalized with graphene quantum dots and its application for methylene blue degradation
Quyen Tran Dang Pham My Ngo Toan Pham Thien Doan Thanh Luong -
Open Access Article
13 - Carbon Quantum Dots (CQDs): As a multipurpose catalyst
Milad Mohammadi Rasooll -
Open Access Article
14 - Invention of a new method for indirect measurement of dimercaprol using the on/off fluorescence emission of functionalized graphene dots
Mohammad Hassan AminiDimercaprol with a molecular structure containing two groups of thiols is a suitable drug in the treatment of heavy metal poisoning. The use of graphene quantum dots has been highly regarded by researchers in various fields, including the manufacture of chemical sensors MoreDimercaprol with a molecular structure containing two groups of thiols is a suitable drug in the treatment of heavy metal poisoning. The use of graphene quantum dots has been highly regarded by researchers in various fields, including the manufacture of chemical sensors, due to their low cost and availability of raw materials, non-toxicity and simple method of their synthesis. In this study, the fluorescence emission of graphene quantum dots whose surface was functionalized with monoethanolamine was used to develop a new method for indirect measurement of dimercaprol concentration. At first, the fluorescence emission of quantum dots quenched in the presence of mercury ions due to the complex formation of mercury ion with functional groups of quantum dots. Then by increasing dimercaprol and forming a strong complex with mercury, the quantum dots released and their fluorescence emission restored. In the invented method, by detecting the linear relationship between quantum dot emission recovery and dimercaprol concentration, in optimal conditions, dimercaprol was measured at concentrations between 0.1-5 μM and with a detection limit of 50 nM in aqueous solutions. Manuscript profile -
Open Access Article
15 - Immobilization of palladium nanoparticles on the magnetic quantum dots based on the carbon of chitosan and its catalytic efficiency in reduction of nitroarenes
fatemeh rafiee niloofar tajfarQuantum dot carbon nanoparticles based on magnetic chitosan (Fe3O4@CQD) were prepared through hydrothermal carbonization of chitosan biopolymer and then magnetization with iron oxide (Fe3O4) nanoparticles. Then, in the presence of palladium chloride in ethanol as a solv MoreQuantum dot carbon nanoparticles based on magnetic chitosan (Fe3O4@CQD) were prepared through hydrothermal carbonization of chitosan biopolymer and then magnetization with iron oxide (Fe3O4) nanoparticles. Then, in the presence of palladium chloride in ethanol as a solvent under reflux conditions without using a reducing agent, palladium nanoparticles were stabilized on the surface of carbon quantum dots, and finally, Fe3O4@CQD@Pd nanocatalyst was obtained. The prepared nanocatalyst was characterized by photoluminescence (PL), Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDS), Inductively coupled plasma (ICP), Vibrating-sample magnetometry (VSM), and X-ray diffraction (XRD) techniques. The efficiency of this magnetic nanocatalyst was evaluated in the reduction reaction of nitroarene derivatives as environmental pollutants, with electron-donating and electron-withdrawing. In the presence of prepared nanocatalyst, at room temperature, and in H2O:EtOH (1:1) as green solvent, aniline derivatives were obtained in excellent yields at short reaction times. Moreover, the nanocatalyst was separated by applying an external magnet and reused at least for four successive runs without a decrease in its catalytic activity. Manuscript profile -
Open Access Article
16 - Evaluation of photovoltaic properties of polymeric solar cell comprising quantum dots with perovskite ligands
رضوان سلطانی علی اصغر کتبابin the present study, attempts have been made for the first time to investigate the influence of lead sulfide (PbS) colloidal quantum dots along with their ligand exchange from long-chain insulating oleic acid )OA) to the short-chain semiconducting methylammonium lead i Morein the present study, attempts have been made for the first time to investigate the influence of lead sulfide (PbS) colloidal quantum dots along with their ligand exchange from long-chain insulating oleic acid )OA) to the short-chain semiconducting methylammonium lead iodide )MA4PbI6), called perovskite, upon the photon harvesting efficiency and photovoltaic characteristics of bulk heterojunction (BHJ) polymeric solar cell comprising ternary photo active layer based on poly )3-hexyl thiophene))rrP3HT) as electron donor and PC61BM as acceptor. According to the photo absorption spectrum obtained within UV-Vis and NIR regions, the ternary cells based on OA and MA4PbI6 capped PbS exhibit enhanced photon harvesting efficiency compared with their binary counterpart cell. The steady state photoluminescence results reveal efficient electron transfer from photoexcited P3HT to QDs and hole transfer from photoexcited QDs to P3HT, leading to the improved power conversion efficiency (PCE) of the ternary cells. However, compared with OA, the semiconducting perovskite )MA4PbI6) ligand shows to be much more effective in increasing power conversion efficiency, so that 6% improvement in PCE is seen by the introduction of 6% PbS QD capped with perovskite ligand unlike PbS QD with OA ligand which had adverse effect on the photovoltaic properties of p 3HT: PC61BM solar cell. This is explained to be due to the insulating characteristic of long chain OA as well as improved charge carrier transport in the case of PbS capped perovskite based ternary solar cells. Manuscript profile -
Open Access Article
17 - طراحی آشکارساز نوری مادون قرمز طول موج بلند بر اساس شفافیت القائی الکترومغناطیسی
مجید ضیائی شیشوان Ali Rostami در این مقاله آشکار ساز نوری مادون قرمز طول موج بلند مبتنی بر شفافیت القائی الکترومغناطیسی که مناسب برای عملکرد در دمای اتاق و محدوده تراهرتز می باشد، پیشنهاد میگردد. انگیزه اصلی از عملکرد در دمای اتاق توسط تبدیل طول موج بلند به طول موج کوتاه یا سیگنال مرئی به وسی More در این مقاله آشکار ساز نوری مادون قرمز طول موج بلند مبتنی بر شفافیت القائی الکترومغناطیسی که مناسب برای عملکرد در دمای اتاق و محدوده تراهرتز می باشد، پیشنهاد میگردد. انگیزه اصلی از عملکرد در دمای اتاق توسط تبدیل طول موج بلند به طول موج کوتاه یا سیگنال مرئی به وسیله پدیده شفافیت القائی الکترومغناطیسی بیان می شود. برای تحقق این ایده از ترازهای اتمی استفاده میگردد که قابلیت شبیه سازی با چاههای کوانتومی یا نقاط کوانتومی را دارد. در ساختار معرفی شده سیگنال مادون قرمز طول موج بلند، مستقیما سبب تحریک الکترون نمی شود بلکه بر روی مشخصه جذب نوری سیگنال مرئی اثر میگذارد. بنابرین میتوان اثر جریان تاریکی ناشی از حرارت را کاهش یا حذف کرد. این ایده قابلیت استفاده به عنوان آشکار ساز نوری مادون قرمز طول موج بلند را دارا می باشد. Manuscript profile -
Open Access Article
18 - Fluorescence Quenching of CdS Quantum Dots and Its Application to Determination of Copper and Nickel Contamination in Well and Dam Water
Jafar Abolhasani Javad Hassanzadeh Ebrahim Ghorbani-Kalhor Zohreh Saeedi -
Open Access Article
19 - Recent Advances in the Development of Quantum Materials for the Construction of Solar Cells: A Mini Review
O. Ashkani B. Abedi-Ravan Y. YarahmadiSolar cells are one of the most important equipment’s in the field of clean and novel energy that can be used without chemical pollution. Solar cells are very valuable equipment that by using them, in addition to reducing environmental pollution, can benefit from clean MoreSolar cells are one of the most important equipment’s in the field of clean and novel energy that can be used without chemical pollution. Solar cells are very valuable equipment that by using them, in addition to reducing environmental pollution, can benefit from clean energy. Solar cells are generally used in various industries, including aerospace, clean energy and even transportation. In the meantime, increasing the efficiency of solar cells is of great importance, and the development of quantum science has made a significant contribution to this issue. The use of quantum dots containing different materials such as graphene, carbon, gallium, lead and similar materials can increase the efficiency of solar cells from 3 to more than 50% on average. Also, the power conversion efficiency in solar cells developed with quantum dot technology reports from 1 to more than 15% improvements compared to conventional solar cells. In this research, to summarize the latest achievements in this field, an overview of the importance of quantum dots about the development of solar cells has been done. Manuscript profile