scholarly journals Allylamine PECVD Modification of PDMS as Simple Method to Obtain Conductive Flexible Polypyrrole Thin Films

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2108
Author(s):  
Robert Texidó ◽  
Salvador Borrós
Keyword(s):  
Thin Films ◽  
Step Method ◽  
Great Stability ◽  
Simple Method ◽  
Pdms Surface ◽  
Polymeric Chains ◽  
Plasma Grafting ◽  
One Step ◽  
Different Shapes ◽  
Amine Groups

In this paper, we report a one-step method to obtain conductive polypyrrole thin films on flexible substrates. To do this, substrates were modified through allylamine plasma grafting to create a high amount of reactive amine groups on PDMS surface. These groups are used during polypyrrole particle synthesis as anchoring points to immobilize the polymeric chains on the substrate during polymerization. Surface morphology of polypyrrole thin films are modified, tailoring the polyelectrolyte used in the polypyrrole synthesis obtaining different shapes of nanoparticles that conform to the film. Depending on the polyelectrolyte molecular weight, the shape of polypyrrole particles go from globular (500 nm diameter) to a more constructed and elongated shape. The films obtained with this methodology reflected great stability under simple bending as well as good conductivity values (between 2.2 ± 0.7 S/m to 5.6 ± 0.2 S/cm).

A facile one-step method to reduce surface impurities in solution-processed CuInS2 nanocrystal solar cells

2015 ◽  
Vol 3 (27) ◽  
pp. 14116-14120 ◽  
Author(s):  
Melissa S. Stahl ◽  
Hamed Azimi ◽  
Christoph J. Brabec
Keyword(s):  
Thin Films ◽  
Solar Cells ◽  
Post Processing ◽  
Step Method ◽  
Simple Method ◽  
Solution Processed ◽  
One Step

This work presents a simple method for post-processing of washing away the impurities formed on the films of solution processed CuInS2 thin films.

High quality perovskite thin films induced by crystal seeds with lead monoxide interfacial engineering

2016 ◽  
Vol 4 (43) ◽  
pp. 16913-16919 ◽  
Author(s):  
Xingyao Liang ◽  
Wenzhe Li ◽  
Jiangwei Li ◽  
Guangda Niu ◽  
Liduo Wang
Keyword(s):  
Thin Films ◽  
Step Method ◽  
High Quality ◽  
Important Method ◽  
Interfacial Engineering ◽  
Lead Monoxide ◽  
One Step

Interfacial engineering is an important method to achieve compact and smooth high-quality perovskite films in a one-step method.

scholarly journals Determination of surface amine groups on amorphous carbon nitride thin films using a one step covalent grafting of a redox probe

2014 ◽  
Vol 136 ◽  
pp. 473-482 ◽  
Author(s):  
S. Jribi ◽  
S.I. Cordoba de Torresi ◽  
T. Augusto ◽  
H. Cachet ◽  
C. Debiemme-Chouvy ◽  
...  
Keyword(s):  
Thin Films ◽  
Amorphous Carbon ◽  
Carbon Nitride ◽  
Redox Probe ◽  
Covalent Grafting ◽  
One Step ◽  
Amine Groups ◽  
Amorphous Carbon Nitride

Preparation of Fe(Pt,Pd) Alloy Thin Films with Flat Surfaces on MgO(001) Single-Crystal Substrates

2015 ◽  
Vol 644 ◽  
pp. 227-231 ◽  
Author(s):  
Mitsuru Ohtake ◽  
Akira Itabashi ◽  
Masaaki Futamoto ◽  
Fumiyoshi Kirino ◽  
Nobuyuki Inaba
Keyword(s):  
Thin Films ◽  
Substrate Surface ◽  
Film Plane ◽  
Film Structure ◽  
Step Method ◽  
Flat Surfaces ◽  
Pd Alloy ◽  
One Step ◽  
Formation Method ◽  
Temperature Deposition

Fe50(Pt1–xPdx)50 (at. %, x = 0, 0.25, 0.5, 0.75, 1) alloy thin films are prepared on MgO(001) substrates by using two methods, high-temperature deposition at 600 °C (one-step method) and low-temperature deposition at 200 °C followed by annealing at 600 °C (two-step method). The influence of formation method on the film structure is investigated. L10 crystals epitaxially grow on the substrates when films are deposited at 600 °C. Disordered crystals transform into L10 structure when films are annealed at 600 °C. The films with x > 0.5 consist of L10(001) crystals with the c-axis normal to the substrate surface, whereas the films with x < 0.25 involve small volumes of L10(100) crystals with the c-axis lying in the film plane. Similar final crystallographic orientation is realized for the Fe (Pt,Pd) films prepared by employing the two different methods. The films prepared by one-step method possess island-like surfaces involving side facets, while those prepared by two-step method have very flat surfaces with the arithmetical mean roughness lower than 0.2 nm. The two-step method is effective for preparation of Fe (Pt,Pd) films with flat surfaces.

scholarly journals Hydrothermal Synthesis of Ag Thin Films and Their SERS Application

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 136
Author(s):  
Nikolay P. Simonenko ◽  
Andrey G. Musaev ◽  
Tatiana L. Simonenko ◽  
Philipp Yu. Gorobtsov ◽  
Ivan A. Volkov ◽  
...  
Keyword(s):  
Thin Films ◽  
Synthesis Temperature ◽  
Temperature Treatment ◽  
Spectral Lines ◽  
Step Method ◽  
Synthesis Conditions ◽  
Sers Substrates ◽  
Low Concentrations ◽  
One Step ◽  
Silver Thin Film

In this article, a facile, one-step method for the formation of silver thin-film nanostructures on the surface of Al2O3 substrates using the hydrothermal method is proposed. The dependence of the SERS effect intensity of the formed films during the detection of methylene blue (MB) low concentrations on the synthesis conditions, additional temperature treatment, and laser radiation wavelength (532 and 780 nm) in comparison with similar dye films on commercial SERS substrates is shown. The detection limit of the analyte used for the indicated lasers is estimated. The effect of the synthesis temperature on the particle size, crystal structure, and microstructure features of the obtained thin films based on silver nanoparticles is demonstrated. Using spreading resistance microscopy, the interface between the substrate and Ag particles is studied, and the dependence of the size of the corresponding gap between them and the nature of microstructural defects on the parameters of hydrothermal treatment of reaction systems in the presence of Al2O3 substrates is shown. As a result of the study, the factors associated with the properties of the obtained SERS substrates and the parameters of recording the spectra, which affect the amplification factor of the spectral lines intensity of the analyte, are revealed.

scholarly journals Single step electrodeposition process using ionic liquid to grow highly luminescent silicon/rare earth (Er, Tb) thin films with tunable composition

RSC Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 3789-3797 ◽  
Author(s):  
Shibin Thomas ◽  
Jeremy Mallet ◽  
Hervé Rinnert ◽  
Michael Molinari
Keyword(s):  
Thin Films ◽  
Ionic Liquid ◽  
Rare Earth ◽  
Room Temperature ◽  
Single Step ◽  
Room Temperature Ionic Liquid ◽  
Step Method ◽  
Electrodeposition Process ◽  
One Step

A one-step method for the electrodeposition of silicon–erbium (Si/Er) and silicon–terbium (Si/Tb) thin films using room temperature ionic liquid (RTIL) has been successfully developed.

scholarly journals One-Step Method for Preparation of Magnetic Nanoparticles Coated with Chitosan

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Karla M. Gregorio-Jauregui ◽  
Ma. Guadalupe Pineda ◽  
Jorge E. Rivera-Salinas ◽  
Gil Hurtado ◽  
Hened Saade ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Measurements ◽  
Average Diameter ◽  
Superparamagnetic Nanoparticles ◽  
Step Method ◽  
Simple Method ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
One Step ◽  
Heavy Metal Ions Removal

Preparation of magnetic nanoparticles coated with chitosan in one step by the coprecipitation method in the presence of different chitosan concentrations is reported here. Obtaining of magnetic superparamagnetic nanoparticles was confirmed by X-ray diffraction and magnetic measurements. Scanning transmission electron microscopy allowed to identify spheroidal nanoparticles with around 10-11 nm in average diameter. Characterization of the products by Fourier transform infrared spectroscopy demonstrated that composite chitosan-magnetic nanoparticles were obtained. Chitosan content in obtained nanocomposites was estimated by thermogravimetric analysis. The nanocomposites were tested in Pb2+removal from a PbCl2aqueous solution, showing a removal efficacy up to 53.6%. This work provides a simple method for chitosan-coated nanoparticles obtaining, which could be useful for heavy metal ions removal from water.

Effect of Dynamic Crosslinking on Mechanical Properties of PP/EPDM Blends

1993 ◽  
Vol 58 (11) ◽  
pp. 2642-2650 ◽  
Author(s):  
Zdeněk Kruliš ◽  
Ivan Fortelný ◽  
Josef Kovář
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Shear Modulus ◽  
High Impact ◽  
Necessary Condition ◽  
Step Method ◽  
Melt Mixing ◽  
One Step ◽  
High Impact Strength ◽  
Dynamic Curing

The effect of dynamic curing of PP/EPDM blends with sulfur and thiuram disulfide systems on their mechanical properties was studied. The results were interpreted using the knowledge of the formation of phase structure in the blends during their melt mixing. It was shown, that a sufficiently slow curing reaction is necessary if a high impact strength is to be obtained. Only in such case, a fine and homogeneous dispersion of elastomer can be formed, which is the necessary condition for high impact strength of the blend. Using an inhibitor of curing in the system and a one-step method of dynamic curing leads to an increase in impact strength of blends. From the comparison of shear modulus and impact strength values, it follows that, at the stiffness, the dynamically cured blends have higher impact strength than the uncured ones.

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