Nano-sized γ-Al2O3 was synthesized successfully by a simple method using Al2(SO4)3·18H2O as aluminium source and in the presence of polyethylene glycol (PEG 2000). FTIR spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) were used to characterize the structure and morphology of synthesized powder. The results showed that PEG playe...

Lorentz TEM enables to map quantitatively magnetic induction fields in the sample. A specifically designed objective lens, a coherent electron source, and a biprism filament can achieve magnetic imaging at the nanometer scale through off-axis electron holography experiments. However, this equipment is specialized and therefore not suited to many microscopy labs. In this article, we describe an ...

This paper reports electron beam induced shrinking of nanopores drilled in free-standing graphene. Nanopores with diameters in the range of 40-60 nm were easily shrunk down to 2 nm and even completely closed by exposure to low beam current densities in a transmission electron microscope (TEM). This method can be used to fine-tune nanopore shape and size, as well as to heal secondary defects and...

For the first time, the existence of zonulae occludentes in the lens epithelia of human and frog has been demonstrated, using a "double mounting" method in freeze-fracture transmission electron microscope (TEM). The physiologic barrier function of zonulae occludentes in frog lens epithelium is determined by a "wash out" procedure in the protein tracer studies. It was found that within various t...

The aim of this study was to formulate nanoparticles (NPs) containing glibenclamide (GB) prepared with Eudragit L100 to achieve a better release profile suitable for per oral administration with enhanced efficacy. The NPs were prepared by solvent displacement method. The influence of various formulation factors (drug : polymer ratio and concentration of surfactants) on particle size, size distr...

Multislice simulations in the transmission electron microscope (TEM) were used to examine changes in annular-dark-field scanning TEM (ADF-STEM) images, conventional bright-field TEM (BF-CTEM) images, and selected-area electron diffraction (SAED) patterns as atomically thin hexagonal boron nitride (h-BN) samples are tilted up to 500 mrad off of the [0001] zone axis. For monolayer h-BN the contra...

BACKGROUND Recently, the pulse-in-pulse mode of intense pulsed light (IPL) has been used increasingly for the treatment of melasma. OBJECTIVE To observe the morphologic changes in the melanophore in adult zebrafish after irradiation with conventional and pulse-in-pulse IPL and Q-switched Nd:YAG (QSNY) laser. METHODS Adult zebrafish were irradiated with conventional and pulse-in-pulse mode o...

Nano-sized γ-Al2O3 was synthesized successfully by a simple method using Al2(SO4)3·18H2O as aluminium source and in the presence of polyethylene glycol (PEG 2000). FTIR spectroscopy, X-ray diffraction (XRD), scanning electron microscope (SEM) and transmission electron microscope (TEM) were used to characterize the structure and morphology of synthesized powder. The results showed that PEG playe...

After decades of efforts, the research on resistance switching (RS) behavior in transition metal oxides has shifted to the stage of verifying the proposed models by direct experimental evidences. In this paper, RS behavior and oxygen content variation of La0.85Sr0.15TiO3/SrTiO3:Nb (LSTO/STON) were investigated by in situ transmission electron microscopy observation and in situ electron energy l...