فهرست مطالب

International Journal Of Bio-Inorganic Hybrid Nanomaterials
Volume:8 Issue: 3, Autumn 2019

  • تاریخ انتشار: 1399/08/03
  • تعداد عناوین: 6
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  • R.Babanikhankahdani* Pages 101-104

    Nowadays, Nano-sized drug delivery systems have been studied extensively for theirpotential in cancer therapy. Various drug nanocarriers are being developed including liposomes, micelles, and Virus like nanoparticles (VLNPs). VLNPs offer many advantages for developing smart drug delivery systems due to their precise and repeated structures and relatively large cargo capacities. Truncated Hepatitis B core antigen (tHBcAg) self-assembles into VLNPs which have been used widely as a nanocarrier for the development of multi-component vaccines. However, the potential of these VLNPs as a nanocarrier for developing a smart drug delivery system has not been studied for years. tHBcAg VLNPs are easily expressed in bacteria and formed VLNP from multiple copies of the same protein, as a result they are highly uniform. Recent studies have shown the capability of these nanoparticles for conjugation or/and packaging of the anti-cancer drug, and targeting to the cancer cells, suggesting the potentials of the tHBcAg VLNPs as novel promising nanocarriers for targeted and controlled drug delivery systems.

    Keywords: Cancer therapy, Controlled drug delivery systems, Nanocarriers, Virus like nanoparticles
  • Sh.Aghabeygi* Pages 105-109

    Montmorillonite/ZrO2 nanocomposites were prepared by the sol-gel method underultrasonic irradiation. The montmorillonite was incorporated into Zirconium gel. After stirring for 24 hr, the mixture was irradiated for 30 min under ultrasonic irradiation. The filtrated composite gel was calcinated at 400°C for 3h in furnace. The morphology of prepared catalysts was characterized by field emission scanning electronic microscopy (FESEM). Energy Dispersive X-ray Spectroscopy (EDS) determined the elemental analysis. Fourier transform infrared (FT-IR) was specified the vibration modes. Moreover, the crystallite size and crystalline structure were characterized by X-ray diffraction (XRD). The photodegradation properties of MMT, ZrO2 and MMT/ZrO2 nanocomposites were compared for removal of Congo red. The results indicated that the photodegradation property of the MMT/ZrO2 nanocomposites was higher than of bare nano ZrO2.

    Keywords: montmorillonite, nanocomposite, Nano ZrO2, Photocatalyst
  • Z.Yousefian*, M.Mohammad Taheri Pages 111-114

    At the present theoretical study, DFT calculations were performed for elucidating thereaction, absorption energy and the quantum molecular descriptors including electronic chemical potential, chemical hardness, Homo, Lumo, band gap energy (Eg) and finding the most active nitrogen-doped graphene sheet (N-G) for absorption H2S, CH4, N2 and CO2 gases. Finally it found that nitrogen-doped graphene absorbs most of the H2S gas.

    Keywords: DFT, Different Properties, Nitrogen-doped graphene sheet, Some gases
  • N.Ebadi* Pages 115-117

    This paper presents the optical characteristics of a quantum well doped InP nanocavity.The resonance wavelength of the nanocavity and the optical field intensity is calculated before and after presence of the quantum wells. The resulting huge filed intensity of about 1.2×108 respect to the incident field is the effect of quantum wells placed in vicinity of center of nanocavity.

    Keywords: Nanocavity, Quantum well, Photonic Crystal
  • Seyed N.Hedayat*, M.T.Ahmadi, Seyed S.Hedayat Pages 119-124

    Carbon nanoscrolls (CNSs) with tubular structure similar to the open multiwall carbonnanotube have been of hot debate during recent years. Due to its unique property, Graphene Nanoscroll (GNS) have attracted many research groups’ attention and have been used by them. They specially studied on energy storage devices such as batteries and super capacitors. These devices can be schematically assumed as rolled up graphene sheets with a spiral form. They are predicted to have high mechanical strength, high carrier mobility, and high thermal conductivity. There are a lot of possibilities for the research in this field since the field study of GNS is very new and many researchers show their interest towards it. The research is endless and GNS gives bright future for nanoscale device technology. By utilizing a novel analytical approach, the current paper introduces modeling the conductance for graphene nanoscroll Furthermore, the conductance was modeled for both degenerate and non-degenerate regimes. Conductivity coefficient as a basic parameter in both degenerate and non-degenerate regimes was explored too.

    Keywords: Coefficient, Conductivity, Degenerate, non-degenerate regimes, Fermi-Dirac integral, Graphene Nanoscroll, Modes
  • S.Ghadamgahi* Pages 125-133

    Recent advances in nanoscience have led to the development of numerous methodologiesfor controlled synthesis of mono dispersed nanoparticles and/or nanoclusters via surface stabilization by organic capping ligands. The application of these nanoparticles in catalysis and other fields often requires the removal of organic ligands. It is known that the removal of organic capping agents or organic residues on gold nanoparticles is necessary for achieving high activity of the catalyst and should ensure the particle remains isolated on the surface without agglomeration. The nanoparticles are deposited on a support and the stabilizing ligands-capped metal particles are then removed to activate the catalyst because in the surface chemistry, clean metal surfaces are more active than “dirty” surfaces, which are passivated by organic fragments. There are many ways to activated supported noble metals particles or clusters like gold including washing procedure, heat treatment, combination of washing procedure and thermal treatment, plasma, ozonolysis and permanganate or even potassium manganite. The gold nanocatalysts activation helps to determine both the physical and chemical nature of the active species and can play an important role in controlling the activity and the selectivity of supported noble metals nanoparticles and nanoclusters.

    Keywords: Heat treatment, Ozonolysis, Permanganate-potassium manganite, Plasma, Washing procedure