Forthcoming and Online First Articles

International Journal of Nanoparticles

International Journal of Nanoparticles (IJNP)

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International Journal of Nanoparticles (5 papers in press)

Regular Issues

  • An analytic study of development of bioconvection in a suspension of randomly swimming gyrotactic microorganisms and nanoparticles   Order a copy of this article
    by Atul Kumar Kushwaha, Yogeshver Dutt Sharma, Shivani Saini 
    Abstract: By formulating a mathematical model for randomly swimming gyrotactic microorganisms, the development of bioconvection in a suspension containing nanoparticles is studied. The modelled system of nonlinear partial differential equations are solved by using linear stability analysis, normal mode analysis and Galerkin weighted residual method to obtain secular equation containing parameters characterizing the onset of bioconvection. The effect of thermophoresis and Brownian motion in the suspension of random swimming gyrotactic microorganisms has been analysed. The numerical results showing dependence of critical thermal Rayleigh number on bioconvection Rayleigh number, nanoparticle Rayleigh number, and nanoparticle Lewis number are also presented graphically. The analysis reveals that thermophoresis, nanoparticle mass diffusivity and volumetric fraction enhance the development of bioconvection. We also found that the impact of the thermal Rayleigh number on the bioconvection Rayleigh number is more significant than the nanoparticle Rayleigh number.
    Keywords: Nanofluid; Random swimming; Brownian motion; Thermophoresis; Linear stability.

  • The green synthesis of gold nanoparticles using fruits and by-products   Order a copy of this article
    by Aijaz Ahmed Bhutto, Abbas Aziz 
    Abstract: Nanotechnology is a promising field that has gained interest because of its broad spectrum of applications. Nanotechnology is the precisely tampering of substances on the nanoscale (1-100 nm). Among the nanoparticles of the noble metals, gold has gained interest due to its unique properties. There are various methods to synthesize the gold nanoparticles for instance Physical, Chemical but the green method is easy, effective, cheapest, eco-friendly and non-toxic. This method has a major potential to boost large production without using toxic chemicals. Gold nanoparticles are easily synthesized by using plant extract and characterized by several techniques like; Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Dynamic Light Scattering (DLS), Atomic force microscopy (AFM) for the morphology. Size and shape play a crucial role in nanoparticle applications. Some factors affect the synthesis and also effects on size and shape of nanoparticles. The current article aims to review the AuNPs synthesis with different fruits extract and their by-products. Reactions condition involved during synthesis, the concentration of precursor salt and volume of extract used, shape and morphology of resulting nanoparticles and techniques used for characterization are also discussed.
    Keywords: Fruit Extract; Gold nanoparticles; Green synthesis; Eco-friendly approach.

  • Transport properties of rare earth doped perovskite material for energy storage devices   Order a copy of this article
    by Soaib Khan, Sweta Sharma, Rajeev Ranjan 
    Abstract: With the growing demand of consumption of energy in everyday life scientific community need to explore alternative and efficient source for energy conversion and storage. Perovskites, a prominent energy material with chemical formula ABX3 plays significant role as sustainable energy material in storage devices and can potentially replace conventional sources of energy as its oxides are stable. Perovskite materials can be used for making the electrode and electrolytes of solar cells, supercapacitors, biofuels and solid oxide fuel cells due to its stability, ferroelectric, superconducting, catalytic, dielectric and photovoltaic nature.rnA detailed study of dielectric properties and a.c conductivity of rare earth doped perovskite Pb1-xRx (Zr0.52Ti0.48)1-x/4O3 where R = Eu, Gd, Nd and Sm and x = 0.00, and 0.05 are done in this research article. XRD report shows that it tetragonal structure and crystalline size in of order of nano meter range which is confirmed by SEM report. Tolerance factor I approximately and Dielectric constant is in the range of 2000 t0 10000 an tangent loss was found to be very less for the doped material. From AC conductivity activation was calculated which found to be less than 1 eV. rn
    Keywords: Perovskite; photovoltaic nature; dielectric.

    by Betty Lincoln, R. Annie Sujathaa 
    Abstract: The surge in the demand for fuel has kindled researchers to extensively explore energy storage devices that exhibit high performance. Over the years, nanomaterials particularly two- dimensional materials have been showing excellent physicochemical properties which is attributed to their high surface area, efficient electrical conductivity, tunable electronic structure, excellent mechanical hardness, and preferred electrochemical characteristics, that make them a better choice for energy storage applications. The transition metal chalcogenides are integrated with other suitable materials and these composites are tuned such that they can be suitable for energy storage devices applications. They reveal improved electrical and structural stability. In this review, we have dealt on the recent progresses on the development of transition metal chalcogenide composites for energy storage applications and also the various methods to improve their thermoelectric properties by increasing their figure of merit thereby leading to the futuristic wearable smart materials that can be used in multidisciplinary field.
    Keywords: Thermoelectric materials; two - dimensional metal chalcogenides; figure of merit.

  • Development, Characterization and Cytotoxicity studies of erlotinib entrapped gellan gum nanoparticles
    by Soumiya Sukumar, Santhiagu Arockiasamy, Manjusha Moothona 
    Abstract: Gellan gum is an anionic, water-soluble polysaccharide produced by the bacterium Sphingomonas paucimobilis ATCC 31461 via the fermentation process. The gellan gum-erlotinib (GgE) nanoparticles were synthesized by the emulsion cross-linking method. The synthesized GgE nanoparticles were characterized by Scanning electron microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD), Differential scanning calorimetry (DSC), Thermogravimetric (TGA), particle size and zeta potential analysis. The influence of gellan, drug and calcium chloride concentration on drug loading and entrapment efficiency was evaluated. In-vitro release behavior of erlotinib was examined by dialysis bag technique. Further, to assess the potential anticancer efficacy of GgE nanoparticles, in-vitro cytotoxicity studies on HepG2 cell lines by SRB assay were carried out. SEM results showed spherical smooth-surfaced nanoparticles. FTIR confirmed the interaction between polymer matrix and erlotinib. The drug loading and entrapment efficiency of GgE nanoparticles increased with gellan and drug concentration. The GgE nanoparticles showed pH-responsive drug release leading to faster release of erlotinib at acidic buffer than neutral and alkaline. The GgE nanoparticles exhibited a cytotoxic effect on HepG2 cells and their cytotoxicity was more significant than free erlotinib and gellan gum.
    Keywords: gellan gum; erlotinib; Sphingomonas paucimobilis; GgE nanoparticles; in-vitro drug release; cytotoxicity.