Forthcoming articles

 


International Journal of Nanoparticles

 

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International Journal of Nanoparticles (10 papers in press)

 

Regular Issues

 

  • The effect of Zn/S-nanoparticles on the thermal stability of Schiff-base polyamide   Order a copy of this article
    by hossein mighani 
    Abstract: The aim of the study was to investigate, the inclusion of the Zn/S-nanoparticles in the sciff-base polamide produced nanocompositmaterial with a higher thermal stability properties. The Zn/S-nanoparticles were synthesized by the reaction of zinc acetate with Thioacetamide in EDTA (Ethylenediaminetetraacetic acid). The thermal properties of polyamide, which is filled with nanoparticles, is tested and the changes of the different temperatures as Tg (the Glass temperature), Tc (the Crystallization temperature) and Tm (the Melting temperature) was recorded. It was concluded that the addition of the nanoparticles increased the thermal Stability of polymer in the higher temperature (50
    Keywords: Zn/S-nanoparticles; schiff-base polyamide; nanocomposite; high thermal stability
     
  • Application of Nanoparticles for Pesticides, Herbicides, Fertilizers and Animals Feed Management   Order a copy of this article
    by Elham Mehrazar, Mahdi Rahaie, Somayeh Rahaie 
    Abstract: Nanotechnology due to special features and control of matter at scale nearly 1-100 nanometers could change agricultural systems. Nanotechnology have been demonstrated to have great potential in providing of novel and improved solutions for many challenges which agriculture sector encounters to them and thus possibly, to enhance yields or nutritional values. The application of nanotechnology for the controlled delivery of pesticides, herbicides and fertilizers provides new approaches to improve safety of products with increasing the efficiency of production and decreased pollution. The development of nanodevices such as smart delivery systems to target specific sites, also nanocarriers for chemical controlled release are current important aspects in novel agriculture. In this review, we discuss about applications of new nanocarriers for smart delivery systems and the role of them in sustainable agricultural production.
    Keywords: Pesticide, Fertilizer, Herbicide, Animal feed, Nanostructure, Nanoparticle, Nanocarrier, Smart Delivery System
     
  • Silver Nanoparticles: Green Route of Synthesis and Antimicrobial Profile   Order a copy of this article
    by Anvesha Sinha, Jayanand Manjhi 
    Abstract: The antimicrobial effects of silver salts have been noticed and applied since antiquity. The effectiveness of silver particles gets enhanced when used in nano size dimensions. Silver nanoparticles are synthesized by physical, chemical and biological methods. Biological sources, such as bacteria, actinomycetes, fungi, and plants are usually favoured due to cost effectiveness, easy to scale up, easy availability of raw materials and environmental friendly nature. Moreover, plants contain various phytochemicals and compounds which may act both as reducing and stabilizing agents in the synthesis of nanoparticles. The silver nanoparticles thus produced are more stable. Various plant extract derived silver nanoparticles have been scrutinized for their potent antimicrobial and anti-inflammatory properties which help them find applications in the medical domain. Moreover, they are being extensively used in agriculture, biotechnology, bio imaging, nano fabrics, electronics, bio-engineering, drug delivery etc.
    Keywords: Silver Nanoparticles, Green Synthesis, Antimicrobial Action, Phytochemicals, Medical Application
     
  • Electric field enhancement of gold tip optical antenna   Order a copy of this article
    by Mehdi Zohrabi, Sergey Kharinsef, Mkh Salakhob 
    Abstract: This paper provides a design of gold tip optical antenna based on a specific Geometry: the change of enhancement of the electric field of plane wave laser excitation : 400 to 700 nm surrounding the optical antenna are simulated. Based on direct illumination of antenna apex in TENOM back ground signal is produced and cause efficiency of optical microscopy.in practice one can change of antenna design and decreas this background signal. Progressions of geometry incorporating the change of period of circular grating in period 200 nm on the shaft of antenna. In addition, the distribution of enhancement of the electric field in a plane perpendicular to the shaft has been acquired.
    Keywords: field enhancement, surface Plasmon, taperedgold tip, localizedPlasmon, confinement of light, hotspot, FDTD simulation
     
  • Recent Developments in Enzymatic Biofuel Cell: Towards Implantable Integrated Micro-devices   Order a copy of this article
    by Diwakar Kashyap, Venkateswaran PS, Prabhat Dwivedi, Young Ho Kim, Gyu Man Kim, Ashutosh Sharma, Sanket Goel 
    Abstract: Enzymatic biofuel cell (EBFC) is envisioned as a viable replacement of batteries to work as a power feeding source for self-powered devices and small-scale sensors. In order to be a viable power feeding device, an EBFC should have a higher power output and needs to be miniaturized for its integration into the existing micro-devices, thus making microfluidic EBFC an attractive option. Recent developments in the area of EBFCs have been discussed with the main emphasis on carbon nanotube based direct electron transfer. This review also covers the research work on the utilization of fuels like Glucose and Fructose for the EBFCs due to their advantages like non-volatility, non-toxicity and ready availability in the human blood. In addition, the in-vivo testing and integration of EBFCs into the microfluidic channel is briefly studied. This review concludes with some possible perspectives on the future research and applications of the EBFCs in microfluidic devices.
    Keywords: Direct electron transfer, Mediated electron transfer, Mediators, Carbon nanotube, Microfluidic devices, Biofuel cell
     
  • Use of Carbon Nanotubes in Concrete for Structural Health Monitoring- A Review   Order a copy of this article
    by Mohamed Elkashef 
    Abstract: Carbon nanotubes (CNTs) are on the frontline of materials research and innovations worldwide. There is a growing interest in CNTs due to their superior mechanical, electrical and thermal properties. The electrical conductivity of individual CNTs is in the order of 104 107 S/m. The incorporation of CNTs in concrete leads to an increase in the electrical conductivity of the CNT/concrete composite. Recently, the use of CNTs in concrete in structural health monitoring has attracted a lot of attention. CNTs/cement composite have shown piezoresistivity property where the electrical resistance of the composite varies with load. This property offers a practical way to sense load variations by monitoring the electrical resistivity of the structure. This paper will give an overview of the current research efforts in this regard. The review will cover the use of both functionalized and pristine CNTs. An overview of the Chemical vapor deposition (CVD) method which is most commonly used to synthesize CNTs will also be presented.
    Keywords: Carbon nanotubes; Nanotechnology; CNT/concrete composites; Pressure-sensitivity; Piezoresistivity; Nanocomposites
     
  • Preparation and characterization of antibacterial silver-containing Nano fibers for wound healing in diabetic mice   Order a copy of this article
    by Maisa Mostafa, Thanaa Shalaby, Nivan Fekry, Amal Elsodfy, Amel El Sheredy 
    Abstract: Impaired wound healing is a common complication of diabetes mellitus. Nanofiber can be served as powerful tools in advanced wound care management. The aim of this work is to evaluate the role of antibacterial nanofibers by incorporating silver nanoparticles into celluose acetate nanofibers as wound dressing on excisional wound healing in diabetic mice. Celluose acetate nanofibers were prepared by electrospinning technique. The prepared nanofibers were characterized using Scanning Electron Microscope (SEM), and Fourier-transform Infrared (FTIR) spectrophotometer. The antimicrobial activity was tested against Gram-positive and Gram-negative bacteria. A full thickness of the excision wound of circular area 95 mm2 and 2 mm depth was created. Wound dressed by silver containing nanofibers, the wound closure rate were assessed, skin wounds were processed for histopathological examination and comparing the mechanical properties of healed skin. It was found that, wounds dressed with silver containing nanofibers showed marked increase in collagen production which improve the skin mechanical properties.
    Keywords: nanofiber; electrospinning; wound dressing; antibacterial properties; healing; diabetes mellitus
     
  • Magnetic iron oxide nanoparticles: preparation and hyperthermia applications   Order a copy of this article
    by thanaa Shalaby, Yousef Yousef, Mostafa Mohamed, Hisham Badwy 
    Abstract: The magnetic hyperthermia is based on localized heating of tumor keeping the healthy cells out of harm. In the process, magnetic hyperthermia involves dispersing magnetic nanoparticles (MNPs) throughout the target tissue and then exposed to ultrasound and/or microwave energy to cause the particles to be heated up to the required temperature of about 45oC. Superparamagnetic nanoparticles were prepared through the co-precipitation method and characterized using TEM, SEM, X-ray diffractometer and Fourier-transform Infrared (FTIR). Magnetic behavior of nanoparticles was studied using Vibrating-Sample Magnetometer (VSM). Through the treatment period, tumor volume was determined every other day. After treatment period, the dielectric properties of the treated tissues were determined. Tumor apoptosis was studied using transmission electron microscope. The results indicate that the magnetic fluid is a suitable mediator for cancer treatment using hyperthermia application with appropriate controlling the heating temperature ranges from 45 to 50oC using microwave and/or ultrasound energy.
    Keywords: Superparamagnetic nanoparticles; Magnetic properties; Co-precipitation; Magnetic fluid hyperthermia; Microwave; Ultrasound; Dielectric properties; Apoptosis.
     
  • Copper hexacyanoferrate-graphene nanocomposite: Synthesis, characterization and application for the electrocatalytic oxidation and determination of thiosulfate   Order a copy of this article
    by Hossein Heli, R Dehdari Vais, N Sattarahmady 
    Abstract: Copper hexacyanoferrate-graphene nanocomposite was synthesized by a facile precipitation route. The morphology and structure of the nanocomposite were evaluated by scanning electron microscopy, X-ray diffraction and infrared spectroscopy. A nanocomposite-modified carbon paste electrode was fabricated and its redox behavior was characterized by means of different electrochemical techniques. The diffusion of the counter cation into the nanocomposite and the charge transfer kinetics across the electrode/electrolyte interface were studied by chronocoulometry and cyclic voltammetry. In the Nyquist diagrams, different time constants related to different physical and electrochemical processes appeared. In these diagrams, percolation of electron in the copper hexacyanoferrate nanoparticles appeared at very high frequencies, and exhibited the feature of a diffusion process with a transmissive boundary condition at the interface of nanocomposite/graphite particles. At medium frequencies, the redox reaction of copper hexacyanoferrate was performed. At very low frequencies, the diffusion of counter cation into the copper hexacyanoferrate nanoparticles dominated. The diffusion coefficients of electron and the counter cation and also the charge transfer rate constant within the nanocomposite were obtained using impedance spectroscopy. The modified electrode showed an efficient electrocatalytic activity toward the electrooxidation of thiosulfate.
    Keywords: Copper hexacyanoferrate; Graphene; Nanocomposite; Thiosulfate; Electrocatalysis
     
  • Au/Ag Composite Nanorings Based on Galvanic Reaction of the Ag Nanoparticles Induced by Laser Ablation in Water   Order a copy of this article
    by Liu guangqiang 
    Abstract: A simple route is presented to fabricate Au/Ag composite nanorings based on the galvanic reaction of the silver colloidal solution by addition of chloroaurate solution. The silver colloidal solution with near monodispersion in size is firstly prepared by laser ablation of Ag target in pure water and subsequent additional irradiation. It has been found that addition of chloroaurate solution to the Ag colloidal solution can produce the Au/Ag composite nanoparticles, which are the ring-like Ag single crystals embedded with ultrafine Au nanoparticles. Further experiments have revealed that appropriate molar ratio of Au to Ag in the solution and round original Ag nanoparticles are crucial to formation of such composite nanorings. This study provides a simple way to fabricate noble metal nanorings with different sizes. Such composite nanorings have exhibited the surface plasmon resonance properties in near-infrared (NIR) bands, and could thus be used as the NIR-excited surface enhanced Raman scattering (SERS) substrates for detection of trace amount molecules and some other nanophotonic devcies.
    Keywords: Au/Ag composite nanorings; galvanic reaction; Ag nanoparticles; laser ablation in water