scholarly journals Synthesis of Nano-Pomegranate Peel via Sol-Gel Method and Screen Characterization

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Awatif I. Muhammed ◽  
Quraish A. Kazem ◽  
Rana A. Kamal ◽  
Ahmed J. Issa ◽  
Inas F. Abed ◽  
...  
Keyword(s):  
Scanning Probe Microscopy ◽  
Sol Gel ◽  
Nano Particles ◽  
Scanning Probe ◽  
Cumulative Distribution ◽  
Pomegranate Peel ◽  
E Coli ◽  
Gram Positive Bacteria ◽  
Average Grain Size ◽  
Measurement Area

Nano peel solution was prepared using Sol-gel technology at a temperature of (80) Celsius. A number of tests were performed to describe the properties and structure of Nano material, including scanning probe microscopy (SPM), which showed the symmetric cumulative distribution of the solution Nanoparticles and the average grain size equal to 64.5 nm and the identical distribution of the Nanoparticles with a diameter of 37.75 nanometers, with a measurement area ranging between (1531.23-1558.19) nanometers. Nano-solution analyzed with a scanning electron microscope (SEM), Inspect type (S50), with a magnification power up to X2000, where dense flakes of Nano particles with a diameter of (50 ± 10) nanometers were observed. The antibacterial activity of Nano-solution by using gram- positive bacteria St. aurous and gram-negative E. coli show the inhibition diameter of (St. aurous) was 27 mm and 25 mm in (E. coli).

Analysis on the Performance of Nano-Composite Resin Dental Restorative Materials

2021 ◽  
Vol 13 (5) ◽  
pp. 927-937
Author(s):  
Fang Liu ◽  
Cheng Qian ◽  
Li Xu ◽  
Rongxiu Zhang ◽  
Liang Liu ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Flexural Modulus ◽  
Nano Particles ◽  
Resin Matrix ◽  
Nano Composite ◽  
E Coli ◽  
Antibacterial Ability ◽  
Gram Positive Bacteria ◽  
Aggregation Effect ◽  
Adhesion Ability

After long-term use of resin materials for dental repair, plaque is easy to accumulate on the surface to form biofilms, which can cause caries. Although antibacterial agents are applied to oral resins, the antibacterial ability, mechanical performance, and biocompatibility of the material have to be considered. In this study, the cationic polymer NPVP with different lengths of alkyl chain is adopted to modify the carbon–nanodiamond (CND), and hydroxyethyl methacrylate (HEMA) is introduced to reduce the cytotoxicity of the modified particles and improve the compatibility with the resin matrix. Among the multiple composite samples obtained, MND-H10 shows the best de-aggregation effect, with a particle size of 70 nm. In addition, it plays a good antibacterial effect against Gram-negative bacteria (GNB) Escherichia coli (E. coli) and Gram-positive bacteria (GPB) Staphylococcus aureus (S. aureus). On this basis, the polymerizable antibacterial nano-composite particles (modified nano-diamonds, MNDs) are prepared and polymerized with the resin matrix Bisphenol A bis-methyl/glycidyl acrylate (Bis-GMA)/Triglycol dimethacrylate (TEGDMA) to construct an antibacterial dental repair material. After testing, the Vickers hardness, flexural strength, and flexural modulus of the 0.6 wt% modified resin material all increase by more than 45%. Due to the addition of nano-particles, the material shows a certain antibacterial ability, an increased hydrophilicity, and antibacterial adhesion ability. 10 patients with clinically defective or missing dentition during June 2017 to October 2017 are selected from the affiliated hospitals of the college, who are treated with the threaded implants. After a year of clinical observation, the threaded implants have achieved better osseointegration results.

Nanofractography of Alumina by Scanning Probe Microscopy

2005 ◽  
Vol 290 ◽  
pp. 70-77
Author(s):  
Junichi Tatami ◽  
Tomoko Ohbuchi ◽  
Katsutoshi Komeya ◽  
Takeshi Meguro
Keyword(s):  
Fracture Surface ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Transgranular Fracture ◽  
Polycrystalline Alumina ◽  
Probe Microscopy ◽  
Fracture Surfaces ◽  
Average Grain Size ◽  
Crystalline Alumina ◽  
Typical Model

Observation of fracture surfaces in ceramics is useful for improving their mechanical properties. In this study, fracture surfaces of polycrystalline alumina were observed using scanning-probe microscopy (SPM) on a nanoscale, also called “nano-fractography.” The average grain size of polycrystalline alumina specimen used in this study was 4.5µm, and the fracture toughness was 3.0MPa･m-1/2. The fracture mode was found to be a mixture of intergranular and transgranular fractures. The fracture surface of intergranular fractures consisted of smooth and rough areas composed of very small steps, whose detection was impossible using scanning electron microscopy. Cleavage and non-cleavage fractures were observed in transgranular fracture grains. The fracture surface of single-crystalline alumina, which is the typical model of the transgranular fracture, was also observed by SPM. The cleavage plane of alumina macroscopically exhibited a very smooth, glass-like surface. However, sub-nano meter steps can be observed on the cleavage fracture surface and appear to be formed by plastic deformation during crack propagation because the size of the step nears that of the Burgers vector.

Nanorods Produced on the Surface of Thin Films of TiOx by Surface-Imprinting

2003 ◽  
Vol 787 ◽  
Author(s):  
M. Joseph Roberts ◽  
Scott K. Johnson
Keyword(s):  
Thin Films ◽  
Recent Work ◽  
Scanning Probe Microscopy ◽  
Sol Gel ◽  
Scanning Probe ◽  
Surface Imprinting ◽  
Probe Microscopy ◽  
Sol Gel Films ◽  
Nanoscale Features

ABSTRACTWorldwide, there is great interest in new processes for production of nanoscale features in materials surfaces. Our recent work explores imprinting of nanosized objects into thin films. In this paper, we present results from surface imprinting of TiOx sol-gel films with anodized alumina. Scanning Probe Microscopy provides evidence for the quality of the imprinting process.

Laser Emission in PMMA Nano-Composite Films

2007 ◽  
Vol 121-123 ◽  
pp. 1233-1236
Author(s):  
Xiao Hong Sun ◽  
Xiao Ming Tao ◽  
Pu Xue ◽  
Jian Guo Deng ◽  
Kwan Kai Cheong
Keyword(s):  
Scanning Probe Microscopy ◽  
Laser Emission ◽  
Composite Films ◽  
Film Structure ◽  
Nano Particles ◽  
Scanning Probe ◽  
Pmma Film ◽  
Random Laser ◽  
Nano Composite ◽  
Low Threshold

In this article, low-threshold random laser with one mirror and feedback is investigated in PMMA film containing Rhodamine 590 and TiO2 nano-particles. Incoherent and coherent laser emission is observed. Optics microscopy and Scanning Probe Microscopy are used to investigate the film structure and the principle of incoherent and coherent laser is analyzed.

Imaging molecules adsorbed onto electrodes under potential control by scanning probe microscopy

1991 ◽  
Vol 49 ◽  
pp. 376-377 ◽  
Author(s):  
N.J. Tao ◽  
J.A. DeRose ◽  
P.I. Oden ◽  
S.M. Lindsay
Keyword(s):  
Surface Charge ◽  
Environmental Effects ◽  
Scanning Probe Microscopy ◽  
Statistical Significance ◽  
Electrochemical Methods ◽  
Surface Structures ◽  
Scanning Probe ◽  
Potential Control ◽  
Afm Imaging ◽  
Special Circumstances

Clemmer and Beebe have pointed out that surface structures on graphite substrates can be misinterpreted as biopolymer images in STM experiments. We have been using electrochemical methods to react DNA fragments onto gold electrodes for STM and AFM imaging. The adsorbates produced in this way are only homogeneous in special circumstances. Searching an inhomogeneous substrate for ‘desired’ images limits the value of the data. Here, we report on a reversible method for imaging adsorbates. The molecules can be lifted onto and off the substrate during imaging. This leaves no doubt about the validity or statistical significance of the images. Furthermore, environmental effects (such as changes in electrolyte or surface charge) can be investigated easily.

The Role of Scanning Probe Microscopy in Drug Delivery Research

1996 ◽  
Vol 13 (3-4) ◽  
pp. 225-256 ◽  
Author(s):  
Kevin M. Shakesheff ◽  
Martyn C. Davies ◽  
Clive J. Roberts ◽  
Saul J. B. Tendler ◽  
Philip M. Williams
Keyword(s):  
Drug Delivery ◽  
Scanning Probe Microscopy ◽  
Scanning Probe ◽  
Probe Microscopy
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