Nanoscience & Nanotechnology-Asia - Volume 10, Issue 5, 2020

The emergence of memristor offers new avenues to look at several potential applications ranging from non-volatile memories to neuromorphic system. A typical sign of the physical memristor device is Pinched Hysteresis Loop. In the aspect of accomplishing this loop with high accuracy, several memristor models have been evolved in the past. Moreover, various mathematical window functions have been developed from Read More

Background: The potential use of nanocarriers is being explored rapidly for the targeted delivery of anticancer agents. Curcumin is a natural polyphenolic compound obtained from rhizomes of turmeric, belongs to family Zingiberaceae. It possesses chemopreventive and chemotherapeutic activity with low toxicity in almost all types of cancer. The low solubility and bioavailability of curcumin make it unable Read More

Introduction: Many nanoformulations have been designed and evaluated for ocular drug delivery system consistently. These nanoformulations are designed for prolonged retention and course time, stable, efficient and reversible drug loading. The ocular bioavailability is very less when the drug is given through topically. Various anatomical and physiological limitations, for example, tear turnover, nasal lachrymal waste, reflex squ Read More

Introduction: A new approach for expressing the lattice thermal conductivity of diatomic nanoscale materials is developed. Methods: The lattice thermal conductivity of two samples of GaAs nanobeam at 4-100K is calculated on the basis of monatomic dispersion relation. Phonons are scattered by nanobeam boundaries, point defects and other phonons via normal and Umklapp processes. Results: A comparative study Read More

Introduction: A numerical study is performed in which the friction factor and forced convection heat transfer is studied for Al2O3 nanoparticle dispersed in water as a base fluid. Methods: Four concentrations of nanofluids in the range of 0-2.5 vol% have been simulated. The Reynolds Number is varied in the range of 100-500 by varying inlet velocity. Cross flow of air is assumed over the pipe with air velocity of 2.2 m/s. Read More

Introduction: We report here our success in developing a flexible RRAM stack structure by employing a low-cost method. Bare conductive commercial electric paint is used as anode against Stainless Steel (SS) foil deposited with Mn3O4 thin films forming a BCEP/Mn3O4/SS thin film stack to understand the intrinsic non-volatile resistive switching behavior of Mn3O4. Experimental: Thin film Mn3O4 is deposited on a SS Read More

Introduction: Pb2+ is a very toxic heavy metal and its pollution to environment is very harmful and to remove its pollution is a very important issue. Methods: In this work, nano Mesocellular Foams (MCF) silica material was synthesized by hydrothermal method in this research. Power X-ray diffraction and scanning electron miccroscopy, etc. were used to characterize the sample. In this paper, the adsorption of heavy metal i Read More

Background: Al-doped ZnO thin films are considered as a promising alternative to ITO in optoelectronic applications. In this work, Al-doped ZnO thin films were prepared using sol-gel spin coating technique. Experimental: The optical properties of the films such as refractive index, extinction coefficient, dielectric function and the absorption coefficient were examined using spectroscopic ellipsometry method in the wavelength Read More

Background: The rate-limiting step in the oral absorption of BCS class II drugs is dissolution. Their low solubility is one of the major obstacles in the process of drug development. Dissolution rate can be increased by decreasing the particle size to the nano range, eventually leading to increased bioavailability. Objective: In the present study, glimepiride loaded nanoparticles were prepared to enhance the dissolution rate. The aim Read More

Objective: In this study, bleached jute yarn was treated with methyl methacrylate and then in situ synthesis of silver nanoparticles were performed. Experimental: Experimental data showed a decrease in tensile strength of treated yarns from 0.91 to 0.78 g/dtex. Afterwards, treated samples were dyed with 1:1 and 1:2 pre-metallised dyes. Results: Methyl methacrylate treated jute yarns exhibited higher color strength (12.55% Read More

Background: In this study, the poly(amidoamine) (PAMAM) G-2 dendrimer was applied to the jute yarn. Methods: Untreated and dendrimer treated jute yarns were then dyed with Direct Yellow 24. Thermodynamic parameters of dyed samples, free energy (ΔG°), the enthalpy (ΔH°), and the entropy (ΔS°) were also evaluated. Results: Dendrimer treated jute yarn showed higher dye sorption compare to untreated jute yarn. Th Read More

Background: Improvement of conventional heat transfer fluids for achieving higher energy efficiencies in thermal equipment is a key parameter to conserve energy in industries. The heat transfer fluids such as water, oil and ethylene glycol greatly suffer low heat transfer performance in industrial processes. There is a need to develop new types of heat transfer fluids that are more effective in terms of heat transfer perfor Read More

Background: With the reducing size of the devices, the leakage power has also increased exponentially in the nano-scale CMOS devices. Several techniques have been devised so far to minimize the leakage power, among which, MTCMOS (power-gating) is the preferred one as it effectively minimizes the leakage power without any complexity in the circuit. However, the power-gating technique suffers from problems like tran Read More

Objective: This work identifies materials that satisfy refractive index, optical band gap, composition profile, conductivity, hall mobility, carrier type and carrier concentration to utilize them in making thin film photovoltaic cells. Methods: We fabricated phosphorous doped amorphous silicon (n+ aSi:H), boron doped amorphous silicon germanium(p+ aSiGe:H) and intrinsic amorphous silicon (i-aSi:H). A detailed and systematic char Read More

Introduction: Clean, safe and potable water with high specifications has been acquired from the red seawater (Suez, Egypt) by utilizing graphene-based chromium oxide (Cr2O3/r-GO) nanocomposites. Experimental: Cr2O3 nanoparticles and Cr2O3/ r-GO nanocomposites have been synthesized from a toxic source (K2CrO7) using the photochemical reduction method where trimethyl ammonium chloride and trisodium citrate wor Read More

Introduction: Solid porous carbon (SPC) with micro-mesopore structures was successfully fabricated from used cigarette filters via carbonization. Experimental: The morphology and structure of the as-prepared porous carbon materials were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and scanning electron microscopy. Results: T Read More