scholarly journals Synthesis, Characterization and Self-Assembly Properties of a New Copper-Phthalocyanine Core Acrylate Block Copolymer

2020 ◽  
pp. 24-29
Author(s):  
Rituparna Saha ◽  
Braja K Mandal
Keyword(s):  
Block Copolymer ◽  
Self Assembly ◽  
Copper Phthalocyanine ◽  
Reaction Scheme ◽  
Electron Microscopies ◽  
Acrylate Copolymer ◽  
Atomic Force ◽  
Ft Ir ◽  
Preliminary Study ◽  
Scanning Electron

A new di-block acrylate copolymer with a Copper-Phthalocyanine (CuPc) core has been synthesized via a multi-step reaction scheme involving the atom-transfer radical polymerization. This material displayed amphiphilic character and consists of a CuPc core with eight copolymer arms. This new amphiphilic material and related intermediates have been characterized by UV-Vis, FT-IR, 1H-NMR and elemental analysis. A preliminary study involving self-assembly properties of this material by optical, atomic force and scanning electron microscopies is presented.

Synthesis of PMMA-b-PS Block Copolymer by Emulsion ATRP and its Self-Assembly Property

2013 ◽  
Vol 705 ◽  
pp. 115-119
Author(s):  
Bao Yong Tian ◽  
Er Jun Tang ◽  
Miao Yuan ◽  
Rui Xia Hao ◽  
Cun Man Li ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Block Copolymer ◽  
Self Assembly ◽  
Potential Application ◽  
Morphological Characteristic ◽  
Living Polymerization ◽  
The Self ◽  
Emulsion System ◽  
Copolymer Concentration ◽  
Ft Ir

The well-defined block copolymer PMMA-b-PS was prepared by two-step ATRP in emulsion system. GPC results indicate that Mn increased linearly with conversion and polydispersity remained relatively narrow. It presents the characteristics of living polymerization in emulsion system. FT-IR demonstrated that block copolymer PMMA-b-PS could be successfully synthesized by ATRP with macroinitiator PMMA-Cl in emulsion system. The morphological characteristic of the self-assembly depends on the block copolymer concentration and transforms between spheres and rodlike micelles. The property indicates a perfect potential application in drug delivery materials.

scholarly journals PRELIMINARY STUDY OF ELECTROPHORETIC DEPOSITION OF VERTICALLY ALIGNED MWCNT ON METALLIC ELECTRODE

2012 ◽  
Vol 05 ◽  
pp. 704-711
Author(s):  
SIAVASH KHABAZIAN ◽  
SOHRAB SANJABI
Keyword(s):  
Carbon Nanotubes ◽  
Metallic Electrode ◽  
Aqueous Solvent ◽  
Multi Walled Carbon Nanotubes ◽  
Dc Electric Field ◽  
Ft Ir ◽  
Vertically Aligned ◽  
Preliminary Study ◽  
Walled Carbon Nanotubes ◽  
Scanning Electron

Multi-walled carbon nanotubes films formed randomly aligned laterally by electrophoresis. Multi-walled carbon nanotubes with lengths of about 10 μ was shortened and functionalized by a mixture of sulfuric and nitric acid. The functional groups on carbon nanotubes were elaborated by FT-IR. Chemically shortened MWCNTs disperse in organic and aqueous solvent and deposited on electrode vertically-aligned by applying a constant DC electric field. The alignment of MWCNTs was observed by scanning electron microscopy. It also the effect of various substrates on alignment of multi-walled carbon nanotubes was investigated.

On the “Step Bunching” Phenomena Observed on Etched and Homoepitaxially Grown 4H Silicon Carbide

2011 ◽  
Vol 679-680 ◽  
pp. 358-361 ◽  
Author(s):  
Massimo Camarda ◽  
Andrea Severino ◽  
Patrick Fiorenza ◽  
Vito Raineri ◽  
S. Scalese ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
High Resolution ◽  
Cross Sectional ◽  
Hydrogen Etching ◽  
Step Bunching ◽  
Electron Microscopies ◽  
Atomic Force ◽  
Transmission Electron ◽  
Surface Morphologies ◽  
Scanning Electron

Using several types of surface analysis (Optical profilometers (OP), Atomic Force Microscopies (AFM), Scanning Electron Microscopies (SEM) and cross-sectional high-resolution Transmission Electron Microscopies (TEM)) we analyze the surface morphologies of misoriented 4H silicon carbide after pre-growth hydrogen etching and homo-epitaxial growths. We observed the characteristic self-ordering of nano-facets on any analyzed surface. This nano-faceting, which should not be confused with step bunching, can be considered as a close-to-equilibrium instability, for this reason can be hindered.

scholarly journals Ciprofloxacin Based on Carrier Double Layered Hydroxide Nano-particles of Fe+3/Fe+2, Fe+3/Ni+2, Al+3/Fe+2, and Al+3/Ni+2 Ions

2020 ◽  
Vol 10 (01) ◽  
pp. 119-126
Author(s):  
Noor M. Mohammed ◽  
Farah AH. Kadhim ◽  
Aseel A. Hammood ◽  
Ashour H. Dawood
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Atomic Force ◽  
Ft Ir ◽  
Double Layered Hydroxide ◽  
Scanning Electron ◽  
Ft Ir Spectroscopy

The double-layered hydroxide nano-particles compounds with ciprofloxacin drug were carried out by preparation of the double layered hydroxide (DLH) of M+3/M+2 ions for selective ions. The ciprofloxacin drug was inserted between them. The resulted compounds were characterized by X-Ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), and Fourier Transform Infrared (FT-IR) spectroscopy; the antibacterial studied done by using the gram (+) and gram (-) pigments.

scholarly journals Inkjet Printing of Controlled ZnO Nanoparticles Layering

2019 ◽  
Vol 8 (1) ◽  
pp. 34-40
Author(s):  
N. Spinella ◽  
C. Galati ◽  
L. Renna
Keyword(s):  
Zno Nanoparticles ◽  
Gas Sensing ◽  
High Surface ◽  
Volume Ratio ◽  
Specific Chemical ◽  
Force Microscopy ◽  
Electron Microscopies ◽  
Atomic Force ◽  
Preliminary Study

 Controlled layering of functional material can produced a versatile film with specific chemical and physical proprieties for desirable applications. This article presented inkjet multilayer structures of ZnO nanoparticles of specific layer morphology and thickness for the development of devices where a high surface-to-volume ratio is required (e.g. micro gas sensors). Stacked multilayers were stratified through a multi-run printing process suitable to produce large-square pattern on flat silicon support. The formation of a multilayer structure was demonstrate through an extended structural characterization of the resulting film. Printed layer morphology was investigated with optical and scanning electron microscopies; atomic force microscopy profiling characterizations were conducted over the entire printed area to evaluate the pattern reproducibility. Finally, a preliminary study as gas sensing film was performed, using the alcohol/ZnO interaction experiments.

Study on ferroelectric domains in BaTiO3 crystalline films and bulk crystals by atomic force and scanning electron microscopies

1998 ◽  
Vol 84 (2) ◽  
pp. 999-1002 ◽  
Author(s):  
S. Tsunekawa ◽  
T. Fukuda ◽  
T. Ozaki ◽  
Y. Yoneda ◽  
T. Okabe ◽  
...  
Keyword(s):  
Bulk Crystals ◽  
Electron Microscopies ◽  
Atomic Force ◽  
Ferroelectric Domains ◽  
Crystalline Films ◽  
Scanning Electron

scholarly journals Effect of Poly (Sodium 4-Styrene Sulfonate) on the Morphology of Hydroxyapatite Particles

2009 ◽  
Vol 2009 ◽  
pp. 1-3 ◽  
Author(s):  
Nesa Esmaeilian Tari ◽  
Mohammad Mahdi Kashani Motlagh
Keyword(s):  
Electron Microscopy ◽  
Nano Particles ◽  
X Ray Diffraction ◽  
Nano Structure ◽  
X Ray ◽  
Styrene Sulfonate ◽  
Atomic Force ◽  
Infrared Spectrometer ◽  
Ft Ir ◽  
Scanning Electron

Nanorods hydroxyapatite, (HAP) is successfully prepared by water in oil microemulsion using, and (water phase), poly(sodium 4-styrene sulfonate) (PSSS) as template and cyclohexane as oil phase. The nano-structure of the product was studied by means of X-ray diffraction (XRD), Fourier transmission infrared spectrometer (FT-IR), scanning electron microscopy (SEM), and atomic force microscope (AFM). With this system, we could synthesize nano-particles of hydroxyapatite with high crystallinity and least agglomeration.

Electrostatic self-assembly layer-by-layer film fabrication using a polycation and a phthalocyanine dye anion

2006 ◽  
Vol 10 (07) ◽  
pp. 986-990
Author(s):  
Young-A Son ◽  
Young-Min Park ◽  
Byung-Soon Kim
Keyword(s):  
Self Assembly ◽  
Copper Phthalocyanine ◽  
The Self ◽  
Layer By Layer ◽  
Layer Film ◽  
Force Microscopy ◽  
Atomic Force ◽  
Diallyldimethylammonium Chloride ◽  
Film Fabrication ◽  
Multi Layer Film

A multi-layer film has been fabricated, using poly(diallyldimethylammonium chloride) ( PDDAC ) and a copper phthalocyanine ( CuPc ) dye, held together by electrostatic forces and layer-by-layer self-assembly attractions. The result of the multi-layer fabrication was characterized by UV-vis absorbance measurements and Atomic Force Microscopy (AFM). UV-vis absorption spectra of the multi-layer films increased linearly at 676 nm, which indicated that the fabrication proceeded regularly. The AFM images show that the surface of the self-assembled multi-layer was thickly covered with PDDAC / CuPc and relatively uniform.

Study on Preparation and Performance of γ-Ray Protection Coating

2011 ◽  
Vol 418-420 ◽  
pp. 835-839 ◽  
Author(s):  
Yuan Lin Zhou ◽  
Xiao Na Zhu ◽  
Ying Jun Li ◽  
Shao Tao Zheng ◽  
Li Li
Keyword(s):  
Contact Angle ◽  
Fourier Transform ◽  
Electron Microscope ◽  
Average Diameter ◽  
Atomic Force ◽  
Ft Ir ◽  
Γ Ray ◽  
And Performance ◽  
Protection Coating ◽  
Scanning Electron

A kind of novel protective coating was prepared by using super-hydrophobic PbWO4 nanocrystals as functional stuffing. The samples were characterized systematically by means of scanning electron microscope (SEM), contact angle analyzer, atomic force microscope (AFM) and Fourier transform infrared spectroscopy(FT-IR). The effects of various amount of nano-PbWO4 particles on shielding ratio to 59.5 keV γ-ray were also discussed. The results revealed that the average diameter of PbWO4 nanocrystals were about 32nm. The contact angle between the modified PbWO4 and water was amounted to 153.08°, which showed that the modified PbWO4 owned super hydrophobic surfaces. The modified PbWO4 had good dispersion and stability in organic solvents. Chemistry reaction happened between components of coatings and nano-PbWO4 particles, thus it showed good compatibility with binders. The shielding ratio to γ-ray was up to 32%, and the hardness and levelling property was greatly improved.

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