International Journal of Nanoparticles (9 papers in press)
Synthesis, characterization and spectral studies of surfactant (PVP, CTAB, and SDS) based ultrafine Ir-Cu bimetallic nanoparticles
by Anjali Goel, Pooja
Abstract: In this study, ultrafine bimetallic nanoparticles of Ir and Cu have been synthesized by chemical reduction method. The effect of stabilizer on the particle size of Ir-Cu bimetallic nanoparticles was investigated. The resultant particles nature, size, surface morphology and elemental composition were computed through the course of XRD, TEM and Field-emission electron microscopy (FE-SEM) respectively. CTAB, SDS and PVP were used to study the effect of cationic, anionic and nonionic surfactant on the particle size and their stability. We found ultimate results with PVP (polyvinyl pyrrolidone) in performance as size regulator as well as particle stabilizing agent rather than CTAB and SDS. XRD results show that, the bimetallic nanoparticles are small in size, less dispersed, amorphous in nature and polygonal in shape. The approximate size of PVP, CTAB & SDS supported particles is 1.32, 8.0, 11.6 nm respectively as calculated by TEM monographs. From EDX data it can be revealed that they are core - shell, with copper core and iridium shell. The XPS results of Ir-Cu/PVP-BMNPs show a deconvulated peak at 59.77 and 62.62 eV binding energy devoted to Ir(0) 4f7/2 and Ir(0) 4f5/2 respectively. The peak at 931.17 eV is the distinctive features of the Cu2p3/2 signal for Cu (0). In BMNPs carbon also recognized with a virtually stable ratio from the surface to the core, and with a C1s binding energy of 282.5eV.
Keywords: Keywords: Bimetallic nanoparticles (BMNPs); PVP; SDS; CTAB.
Types of nanomaterials in the food packaging: A review
by Kambiz Sadeghi, Mohammad Shahedi, Mohammadali Najafi, Amireh Sadeghi, Mohsen Shirani
Abstract: The advent of nanotechnology has provided remarkable methods for fabricating advanced materials. As such, packaging nanocomposite as one of the research hotspots in the nano-sized science, tends to extend shelf life of fresh food items. Active and intelligent packaging are two great achievements of nanotechnology in which organic and inorganic nanoparticles have showed great effects on the packaging matrix. In particular, nanosensor as an emerging technology can convert data from food items into intelligible signals to communicate with consumers. The objectives of this study are aligned with investigation of various nanostructures commonly used in the packaging industry, and providing an overview of their effects on the packaging performance. This review also elaborates human and environmental safety concerns regarding the application of nanoparticles, and identifies the legislation that has been recently launched.
Keywords: Nanomaterials; food packaging; Nanosensors; Safety concerns.
Investigation of DC Performance of Ge-Source Pocket Silicon-on-Insulator Tunnel Field Effect Transistor in Nano Regime
by Sanjeet Kumar Sinha, Sweta Chander
Abstract: As devices are scaled down in nano regime the steepest sub-threshold swing becomes the most desirable characteristics for the improvement of the performance of devices. To address this issue, Tunnel Field Effect Transistor is one of the promising candidates for replacing conventional MOS device. This paper investigates the impact of source pocket on switching behavior of n-type Ge-source SOI-TFET and shows improvements in the device performance in terms of SS, ION, IOFF and ION/IOFF. The proposed device is compared with the homo-junction SOI-TFET. The improved electrical characteristics of device are analyzed on the basis of simulation results and justify by the theoretical concept. The device offers the steepest SS of 11mV/decade, higher ION of 120
Keywords: Tunnel Field Effect Transistor; Heterojunction; Homojunction; Subthreshold swing;SOI-TFET.
ANTICANDIDAL AND ANTIOXIDANT ACTIVITY OF SILVER AND GOLD NANOPARTICLES BIOSYNTHESISED USING MATURED ARECA NUT HUSK EXTRACT
by Bhavana Pradeep, Priyanaka Hemba, Anusha Kunnathuli Jagadeesh, Chaitra Ganappa Ramakkanavar, Sneha Nayak, Chandrayan Vaman Rao
Abstract: The present work focuses on biosynthesis of silver as well as gold nanoparticles using matured Areca catechu (Areca nut) husk extract and study on their functional properties. Change in the colour of the extract from pale-yellow to orange and purple, surface plasmon resonance in the region of 400-450 nm and 500-550 nm, respectively indicated the formation of silver and gold nanoparticles. When subjected to anticandidal test, it was found that the nanoparticles could inhibit the growth of Candida albicans, where an inhibition zone of 9 mm and 6 mm was observed for silver and gold nanoparticles, respectively. It was found that silver and gold nanoparticles exhibit better antioxidant capacity than the husk extract. These antioxidant properties of nanoparticles can be used in the production of various pharmaceutical and cosmetic products. Using this approach, areca nut husk can be put into good use, which otherwise, is treated as waste.
Keywords: Anticandidal activity; antioxidant activity; biosynthesis; Candida albicans; gold nanoparticles; matured areca nut husk extract; particle size distribution; phytochemicals; silver nanoparticles; zeta potential.
Synthesis And Characterization Of Zinc Oxide Nanoparticles And Its Antimicrobial Activity Against Staphylococcus Aureus And Micrococcus
by Gagandeep Kaur, Sonica Sondhi, Palki Sahib Kaur, Anjoo Kamboj, Shalini Verma
Abstract: A detailed analysis of synthesis and characterization of Zinc oxide(ZnO) nanoparticles (NPs) with a motive of demonstrating the effect of of ZnO on its antibacterial effect is reported herein. A rapid synthesis method of highly dispersed zinc oxide nanoparticles by using zinc acetate dihydrate and ammonium carbonate as a precursor and Polyethylene glycol (PEG) as a capping agent is presented in this study. The results of characterization techniques like ultraviolet visible (UV-Vis) spectroscopy, zeta potential and particle size analyzer confirmed ZnO NPs of better quality and of uniform sized. Further, the ZnO NPs revealed promising inhibitory activity against the growth of Staphylococcus aureus and Micrococcus.
Keywords: Synthesis; Nanoparticles; Zinc oxide; Microbial activity,Spectroscopy; zeta potential; particle size analyzer; S. aureus; Micrococcus; Characterization; Zone of Inhibition.
Performance Assessment of Double Gate Graded Junction-Less-FET Device with Temperature Variations
by Sanjeet Kumar Sinha
Abstract: This paper reports a simulation-based study of double gate graded channel junctionless metal field effect transistor (MOSFET) incorporating the effects of doping engineering. The proposed device has been optimized to study the effect of temperature on the device characteristics such as surface potential, transfer characteristics, ION/IOFF ratio and, threshold voltage. To justify the enhanced performance of the Graded Double Gate Junctionless (DG-JL) FET, it is compared with non-graded DG-JL-FET. To design and optimize the device, the simulation as a tool take part in understanding of basic physics.The Graded DG-JL-FET have better performance over the conventional DG-JL-FET, in terms of ION/IOFF ratio. The temperature effects on various parameters for 1:3 graded structure is obtained and compared with conventional non-graded structure. The shift in potential towards one side and deeper in case of graded structures, IOFF current reduced significantly without affecting ION current. The threshold voltage roll-off with temperature is found slower in Graded structure than that in Conventional non-graded structure.In this work, Visual TCAD a simulation tool is used to simulate the electrical characteristics of the proposed device.
Keywords: MOSFET; TFET; Temperature; junctionless.
Heavy metal removal from polluted water by Nopal cactus biopolymer based magnetic nanocomposites
by Nghia Bui, Loan Duong, Thach Nguyen, Ngoc Tran
Abstract: In present study, Nopal cactus biopolymer based magnetic nanocomposites were generated by a two-step process in which cobalt superparamagnetic (CoFe2O4) nanoparticles were firstly synthesized following a co-precipitation method with the aid of surfactants. Then, the composite materials with the nanoparticles dispersed in the matrix of biopolymer, which was extracted from Nopal cactus, were achieved with the support of ultrasonication. The obtained black nanocomposites were fully characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), vibrating sample magnetometry (VSM) and Fourier transform infrared (FT-IR). The nanocomposites as novel nano-adsorbents were used for removal of heavy metal ions from aqueous solution. In addition, the nanocomposites were strongly attracted by permanent magnet due to superparamagnetism, making it easy to completely isolate them from water and exhibiting good reusability
Keywords: heavy metal; polluted water; nanocomposites; magnetic; Nopal cactus; biopolymer; CoFe2O4 nanoparticles; superparamagnetism; nano-adsorbents.
OPTIMIZATION OF PCL-HA LADEN BIODEGRADABLE NANOPARTICLES CONTAINING CYCLOSPORINE-A FOR THE TREATMENT OF DRY EYE SYNDROME: IN VITRO-IN VIVO EVALUATION
by Ishrat Chhowala, ASHABEN SHANKARBHAI PATEL, Rakesh Patel, Vashishth Bhavsar, Abhay Dharamsi
Abstract: The purpose of the present study is to develop hyaluronic acid-laden biodegradable nanoparticles containing cyclosporine-A and sustained the release for ophthalmic delivery. The nanoparticles were prepared by solvent diffusion technique followed lyophilisation. Optimization of product variables for nanoparticles were done by Central Composite Design (CCD) with particle size and entrapment efficiency as chosen responses The developed formulation consisting 1.18% Polycaprolactone and 0.16% hyaluronic acid showed 376.6 nm, -0.438
Keywords: Dry Eye Syndrome; Cyclosporine-A; Hyaluronic acid; Biodegradable nanoparticles; Lyophillization; in vivo pharmacokinetic study.
Quantum dot solar cell: an emerging nanomaterial-based device in the solar Industry
by Sweta Sharma, Soaib Khan, Yogesh Kumar, Rajeev Ranjan
Abstract: The worldwide energy is on the cusp of monstrous alter, driven by an unquenchable request and an increasing mindfulness of the constrained supply and corrupting environment of fossil fuels. More intensive research has been conducted around the world to get different economical energy arrangements. Quantum dot manufactured sun powered cell is the innovation for long run which can give required efficiency to run the solar industry facing with various challenges underneath silicon photovoltaic cell. Quantum dot cells are most flexible frame of renewable vitality since of its unique properties for producing power, warming as well as desalinating water. QDs have bandgaps which are flexible over a wide range of energy levels by changing the dot size. Semiconductor QDs, due to their quantum-based properties, give a modern pathway for controlling energy stream. In this manner, they have the tremendous potential to upgrade the efficiency of solar photovoltaic cells. In this mini review paper, we have collectively summarized the advancements of Quantum dot solar cell. We are foreseeing that this review will certainly help the researchers for more serious examination of investigations of the nanomaterial in various innovative ranges.rnrn
Keywords: Quantum dot solar cells; semiconductor nanoparticle; QD; Photovoltaic cell; bandgap.