Synthesis and Characterization of Supported Bioactive Lipid Membranes

1997 ◽  
Vol 489 ◽  
Author(s):  
Theodore M. Winger ◽  
Elliot L. Chaikof
Keyword(s):  
Lipid Membranes ◽  
Room Temperature ◽  
Synthesis And Characterization ◽  
Peptide Conjugates ◽  
Force Microscopy ◽  
Atomic Force ◽  
Membrane Mimetic ◽  
Phosphate Buffered Saline ◽  
Mixed Systems

AbstractSingle and multicomponent membrane-mimetic surfaces of DPPC and synthetic lipid-peptide conjugates were formed on an alkylated glass surface by a process of vesicle fusion. Correlative atomic force microscopy and radiochemical titration techniques confirmed the generation of a single substrate supported monolayer and predictable deposition of defined concentrations of lipopeptide. Mixed systems were stable for periods exceeding 1 month if stored at room temperature in phosphate buffered saline.

Electrical Characterization of Al Implanted 4H-SiC Layers by Four Point Probe and Scanning Capacitance Microscopy

2009 ◽  
Vol 615-617 ◽  
pp. 457-460 ◽  
Author(s):  
Filippo Giannazzo ◽  
Martin Rambach ◽  
Dario Salinas ◽  
Fabrizio Roccaforte ◽  
Vito Raineri
Keyword(s):  
Room Temperature ◽  
Annealing Temperature ◽  
Electrical Characterization ◽  
Electrical Activation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Activation Data ◽  
Accurate Comparison ◽  
Spike Anneal

We studied the evolution of the electrical activation with annealing temperature and time in 4H-SiC implanted with Al ions at room temperature (RT). An accurate comparison between the electrical activation data obtained by FPP and SCM was carried out. The dependence of the electrically active profiles on annealing time was studied during isothermal (Tann=1600 °C) annealings for times ranging from 0 (spike anneal) to 30 min. By performing isochronal (t=30 min) processes at temperatures from 1550 to 1650 °C, the effect of the annealing temperature on the net doping concentration profiles was studied. Moreover, the activation energy (6.30.3 eV) associated to the process was extracted from the Arrhenius plot of the net active dose. Finally, the effect of the different thermal budgets on the roughening of the Al implanted 4H-SiC surface was also investigated in details by atomic force microscopy.

scholarly journals Biosynthesis and Characterization of Silver Nanoparticles From Pantoea agglomerans and Some of Their Antibacterial Activities

2020 ◽  
Vol 31 (3) ◽  
pp. 1
Author(s):  
Layla Abdul-Hamid Said
Keyword(s):  
Escherichia Coli ◽  
Silver Nanoparticles ◽  
Room Temperature ◽  
Antibacterial Activities ◽  
Multidrug Resistant ◽  
Pantoea Agglomerans ◽  
Force Microscopy ◽  
Atomic Force ◽  
And Staphylococcus Aureus

Recently, the biosynthesis of nanoparticles from bacteria have attracted attention, this study has been made for biosynthesize and characterizes silver nanoparticles (AgNPs) from local clinical isolate Pantoea agglomerans. The ability of those particles to inhibit the virulence factors biofilm and hemolysin produced by some local clinical multidrug-resistant human pathogenes including Acinetobactor haemolyticus, Escherichia coli, Serratia marcescens and Staphylococcus aureus were investigated by treating all of the test isolates with sub-MIC(16 mg/ml) AgNPs. The AgNPs produced were characterized using Atomic Force Microscopy (AFM). Pantoea agglomerans were found to have the ability to synthesize AgNPs at room temperature within 24hrs and were spherical in shape as depicted by AFM. The AgNPs produced exhibited a potential antibiofilm and hemolysin inhibition activities against tested pathogens.

scholarly journals Analysis, Synthesis and Characterization of Thin Films of a-Si:H (n-type and p-type) Deposited by PECVD for Solar Cell Applications

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6349
Author(s):  
Abel Garcia-Barrientos ◽  
Jose Luis Bernal-Ponce ◽  
Jairo Plaza-Castillo ◽  
Alberto Cuevas-Salgado ◽  
Ariosto Medina-Flores ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Optical Band Gap ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
The Third ◽  
Atomic Force ◽  
Uv Visible ◽  
P Type

In this paper, the analysis, synthesis and characterization of thin films of a-Si:H deposited by PECVD were carried out. Three types of films were deposited: In the first series (00 process), an intrinsic a-Si:H film was doped. In the second series (A1–A5 process), n-type samples were doped, and to carry this out, a gas mixture of silane (SiH4), dihydrogen (H2) and phosphine (PH3) was used. In the third series (B1–B5 process), p-type samples were doped using a mixture of silane (SiH4), dihydrogen (H2) and diborane (B2H6). The films’ surface morphology was characterized by atomic force microscopy (AFM), while the analysis of the films was performed by scanning electron microscopy (SEM), and UV–visible ellipsometry was used to obtain the optical band gap and film thickness. According to the results of the present study, it can be concluded that the best conditions can be obtained when the flow of dopant gases (phosphine or diborane) increases, as seen in the conductivity graphs, where the films with the highest flow of dopant gas reached the highest conductivities compared to the minimum required for materials made of a-Si:H silicon for high-quality solar cells. It can be concluded from the results that the magnitude of the conductivity, which increased by several orders, represents an important result, since we could improve the efficiency of solar cells based on a-Si:H.

scholarly journals Synthesis and Characterization of the Fluorescent Self-Assembled Structures Formed by Benzothiazolone Conjugates and Applications in Cellular Imaging

2021 ◽  
Author(s):  
Nidhi Gour ◽  
Vivekshinh Kshtriya ◽  
Bharti Koshti ◽  
Ankit Gangrade ◽  
Ashadul Haque ◽  
...  
Keyword(s):  
Mammalian Cells ◽  
Cell Imaging ◽  
The Self ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
Imaging Tool ◽  
Atomic Force ◽  
Mechanisms Of Formation ◽  
Self Assembled

<p>We report <a>the synthesis and characterization of self-assembled</a> structures formed by4-Choro-2(3H)-benzothiazolone (<b>VK</b>) to panchromatic fibers and its application as cell imaging tool. The aggregation properties ofthe synthesized compounds have been studied extensively under different solvent and concentrationand theirmorphologies examined at supramolecular level was observed by microscopic techniques like optical microscopy, fluorescence microscopy, and atomic force microscopy(AFM). Interestingly, the self-assembled structures formed by <b>VK</b>reveal panchromatic emission properties andshow blue, green and red fluorescence under different excitation filters. The intensity of the fluorescence observed was blue>green>red and the dye interestingly do not show any fluorescence quenching, on the other hand reveal photoactive properties under green channel. The mechanisms of formation of the self-assemblies were studied through different techniques like concentration dependent NMR and,UV visible spectroscopy and fluorescencemicroscopic studies.Finally, the utility of <b>VK</b> for cell imaging applications is demonstrated and it can be noted that <b>VK</b> can be efficientlyup taken by mammalian cells and the stained cells reveal panchromatic emission under blue, green and red channel.<b></b></p>

AFM, HR-XRD AND PL CHARACTERIZATION OF STACKED STRUCTURES In0.5Ga0.5As/GaAs QUANTUM DOTS

NANO ◽  
2010 ◽  
Vol 05 (02) ◽  
pp. 127-132 ◽  
Author(s):  
DIDIK ARYANTO ◽  
ZULKAFLI OTHAMAN ◽  
AMIRA S. AMERUDDIN ◽  
ABD. KHAMIM ISMAIL
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Size Composition ◽  
X Ray Diffraction ◽  
Satellite Peak ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Vertically Aligned

In0.5Ga0.5As quantum dots (QDs) stacked structure were studied using atomic force microscopy (AFM), high-resolution X-ray diffraction (HR-XRD) and photoluminescence (PL) characterization. Evolution in the dots size and dots density in the stacked structures is strongly influenced by the dot formation in the under-layer and the structure of the spacer layers. AFM results revealed that the dots formation on the top can be changed by increasing the number of stacked QDs. However, the dots formation is not vertically aligned since HR-XRD measurement gave different satellite peak on n-stacked QD structures. Room-temperature PL measurements show variation in the PL spectra, where blue-shifted PL peak positions are observed when the number of stack is increased. Variation in the HR-XRD and PL measurement is also attributed to the size, composition and density of the dots in the stacked structures.

scholarly journals The synthesis and characterization of benzotriazole-based cationic surfactants and the evaluation of their corrosion inhibition efficiency on copper in seawater

RSC Advances ◽  
2019 ◽  
Vol 9 (46) ◽  
pp. 27069-27082 ◽  
Author(s):  
M. A. Migahed ◽  
Ahmed Nasser ◽  
H. Elfeky ◽  
M. M. EL-Rabiei
Keyword(s):  
Cationic Surfactants ◽  
Corrosion Inhibitors ◽  
Inhibition Efficiency ◽  
Electrochemical Techniques ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
Copper Electrodes ◽  
Atomic Force ◽  
Corrosion Inhibition Efficiency

Three cationic surfactants based on benzotriazole were prepared and their efficiencies as corrosion inhibitors for copper electrodes in seawater were evaluated using different electrochemical techniques (polarization methods, EIS techniques and atomic force microscopy).

scholarly journals Synthesis and Characterization of the Fluorescent Self-Assembled Structures Formed by Benzothiazolone Conjugates and Applications in Cellular Imaging

2021 ◽  
Author(s):  
Nidhi Gour ◽  
Vivekshinh Kshtriya ◽  
Bharti Koshti ◽  
Ankit Gangrade ◽  
Ashadul Haque ◽  
...  
Keyword(s):  
Mammalian Cells ◽  
Cell Imaging ◽  
The Self ◽  
Synthesis And Characterization ◽  
Force Microscopy ◽  
Imaging Tool ◽  
Atomic Force ◽  
Mechanisms Of Formation ◽  
Self Assembled

<p>We report <a>the synthesis and characterization of self-assembled</a> structures formed by4-Choro-2(3H)-benzothiazolone (<b>VK</b>) to panchromatic fibers and its application as cell imaging tool. The aggregation properties ofthe synthesized compounds have been studied extensively under different solvent and concentrationand theirmorphologies examined at supramolecular level was observed by microscopic techniques like optical microscopy, fluorescence microscopy, and atomic force microscopy(AFM). Interestingly, the self-assembled structures formed by <b>VK</b>reveal panchromatic emission properties andshow blue, green and red fluorescence under different excitation filters. The intensity of the fluorescence observed was blue>green>red and the dye interestingly do not show any fluorescence quenching, on the other hand reveal photoactive properties under green channel. The mechanisms of formation of the self-assemblies were studied through different techniques like concentration dependent NMR and,UV visible spectroscopy and fluorescencemicroscopic studies.Finally, the utility of <b>VK</b> for cell imaging applications is demonstrated and it can be noted that <b>VK</b> can be efficientlyup taken by mammalian cells and the stained cells reveal panchromatic emission under blue, green and red channel.<b></b></p>

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