scholarly journals Thin Films Based on Cobalt Phthalocyanine:C60 Fullerene:ZnO Hybrid Nanocomposite Obtained by Laser Evaporation

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 468
Author(s):  
Marcela Socol ◽  
Nicoleta Preda ◽  
Andreea Costas ◽  
Bogdana Borca ◽  
Gianina Popescu-Pelin ◽  
...  
Keyword(s):  
Thin Films ◽  
Zno Nanoparticles ◽  
Photovoltaic Effect ◽  
Inorganic Nanoparticles ◽  
Nanocomposite Films ◽  
C60 Fullerene ◽  
Laser Evaporation ◽  
Hybrid Nanocomposite ◽  
Absorption Bands ◽  
Nanocomposite Thin Films

Matrix-assisted pulsed laser evaporation (MAPLE) was used to deposit hybrid nanocomposite thin films based on cobalt phthalocyanine (CoPc), C60 fullerene and ZnO nanoparticles. The inorganic nanoparticles, with a size of about 20 nm, having the structural and optical properties characteristic of ZnO, were chemically synthesized by a simple precipitation method. Furthermore, ZnO nanoparticles were dispersed in a dimethyl sulfoxide solution in which CoPc and C60 had been dissolved, ready for the freezing MAPLE target. The effect of the concentration of ZnO nanoparticles on the structural, morphological, optical and electrical properties of the CoPc:C60:ZnO hybrid nanocomposite layers deposited by MAPLE was evaluated. The infrared spectra of the hybrid nanocomposite films confirm that the CoPc and C60 preserve their chemical structure during the laser deposition process. The CoPc optical signature is recognized in the ultraviolet–visible (UV–Vis) spectra of the obtained layers, these being dominated by the absorption bands associated to this organic compound while the ZnO optical fingerprint is identified in the photoluminescence spectra of the prepared layers, these disclosing the emission bands linked to this inorganic semiconductor. The hybrid nanocomposite layers exhibit globular morphology, which is typical for the thin films deposited by MAPLE. Current-voltage (J-V) characteristics of the structures developed on CoPc:C60:ZnO layers reveal that the addition of an appropriate amount of ZnO nanoparticles in the CoPc:C60 mixture leads to a more efficient charge transfer between the organic and inorganic components. Due to their photovoltaic effect, structures featuring such hybrid nanocomposite thin films deposited by MAPLE can have potential applications in the field of photovoltaic devices.

Gravure printed sol–gel derived AlOOH hybrid nanocomposite thin films for printed electronics

2015 ◽  
Vol 3 (8) ◽  
pp. 1776-1786 ◽  
Author(s):  
Terho Kololuoma ◽  
Jaakko Leppäniemi ◽  
Himadri Majumdar ◽  
Rita Branquinho ◽  
Elena Herbei-Valcu ◽  
...  
Keyword(s):  
Thin Films ◽  
Dielectric Constant ◽  
High Dielectric Constant ◽  
Printed Electronics ◽  
Sol Gel ◽  
Nanocomposite Films ◽  
Hybrid Nanocomposite ◽  
Gravure Printing ◽  
Nanocomposite Thin Films ◽  
High Dielectric

We report a sol–gel approach to fabricate aluminum oxyhydroxide (AlOOH)-based inks for the gravure printing of high-dielectric-constant nanocomposite films.

Enhanced electrical conductivity of Au–LaNiO3 nanocomposite thin films by chemical solution deposition

RSC Advances ◽  
2015 ◽  
Vol 5 (94) ◽  
pp. 76783-76787 ◽  
Author(s):  
H. L. Wang ◽  
X. K. Ning ◽  
Z. J. Wang
Keyword(s):  
Thin Films ◽  
Electrical Conductivity ◽  
Electrical Properties ◽  
Chemical Solution Deposition ◽  
Nanocomposite Films ◽  
Chemical Solution ◽  
Solution Deposition ◽  
Nanocomposite Thin Films ◽  
One Step

Au–LaNiO3 (Au–LNO) nanocomposite films with 3.84 at% Au were firstly fabricated by one-step chemical solution deposition (CSD), and their electrical properties were investigated.

Nanoparticle Reinforced Metal Composites Prepared by Electrocodeposition

2013 ◽  
Author(s):  
Michael J. Koludrovich ◽  
Yong X. Gan
Keyword(s):  
Thin Films ◽  
Nanocomposite Films ◽  
Alumina Nanoparticles ◽  
Al2o3 Nanoparticles ◽  
Nanoparticle Agglomeration ◽  
Control Film ◽  
Significant Difference ◽  
Nanocomposite Thin Films ◽  
Agglomeration Of Nanoparticles ◽  
Pure Cu

Improving the physical and mechanical properties such as hardness and strength of metal thin films can be achieved by incorporating nanoparticles into the pure metals, for example via electrocodeposition. However, the agglomeration of nanoparticles during electrocodeposition of nanocomposite thin films is an unresolved issue. This paper presents the preliminary results of electrocodeposition thin nanocomposite films under different processing conditions. The microstructure and distribution of Al2O3 nanoparticles in electrocodeposited Cu matrix nanocomposite thin films on a pure Al plate were examined. In addition, the effect of electrolyte concentration on the agglomeration of nanoparticles was studied. Different stirring times were used for electrodepositing the alumina/Cu nanocomposite and the pure Cu control film. Under the constant stirring condition, different deposition times including 1, 4, 8, 12, and 24 hours were taken to study the differences between the agglomeration states of the alumina nanoparticles with the time change. We also examined the effect of turning the electromagnetic stirrer ON and OFF at different time intervals from as short as every 20 minutes to as long as ON and OFF every 2 hours on the nanoparticle agglomeration in the film. Optical and electron microscopic studies were made to reveal the microstructure of the nanocomposite. It is found that there is no significant difference in microstructures for the specimens that made under either intermittent stirring or constant stirring for the same length of time.

scholarly journals MAPLE Deposition of Binary and Ternary Organic Bulk Heterojunctions Based on Zinc Phthalocyanine

Coatings ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 956
Author(s):  
Marcela Socol ◽  
Nicoleta Preda ◽  
Gabriela Petre ◽  
Andreea Costas ◽  
Oana Rasoga ◽  
...  
Keyword(s):  
Thin Films ◽  
Acid Methyl Ester ◽  
Open Circuit ◽  
Zinc Phthalocyanine ◽  
Morphological Properties ◽  
C60 Fullerene ◽  
Ternary Blend ◽  
Laser Evaporation ◽  
Bulk Heterojunctions ◽  
Vis Spectroscopy

Organic bulk heterojunctions (BHJ) based on zinc phthalocyanine (ZnPc), fullerene compounds (C60 fullerene and [6,6]-phenyl C71 butyric acid methyl ester (PC70BM)), and 5,6,11,12-tetraphenylnaphthacene (rubrene) were fabricated through the matrix-assisted pulsed-laser evaporation (MAPLE) technique. Thus, ZnPc:C60 and ZnPc:PC70BM binary BHJ and ZnPc:rubrene:PC70BM ternary BHJ were deposited as thin films on various substrates. The preservation of the chemical structure of the organic compounds during the MAPLE deposition was confirmed by infrared spectroscopy. The structural, optical, and morphological properties of the deposited layers were investigated by X-ray diffraction (XRD), UV-Vis spectroscopy, photoluminescence (PL), field emission scanning electron microscopy (FESEM), and atomic force microscopy (AFM), respectively. Further, the electrical properties of the developed structures based on ZnPc:C60, ZnPc:PC70BM, and ZnPc:rubrene:PC70BM were evaluated. The J-V characteristics of the organic structures, recorded under illumination, show that an increase in the open-circuit voltage (VOC) is achieved in the case of the ternary blend in comparison with that obtained for the binary blends. The results evidenced that MAPLE-deposited thin films containing binary and ternary organic bulk heterojunctions can find applications in the field of photovoltaic devices.

scholarly journals Thermal Annealing Effect on Structural, Morphological, and Sensor Performance of PANI-Ag-Fe Based ElectrochemicalE. coliSensor for Environmental Monitoring

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Norshafadzila Mohammad Naim ◽  
H. Abdullah ◽  
Akrajas Ali Umar ◽  
Aidil Abdul Hamid ◽  
Sahbudin Shaari
Keyword(s):  
Thin Films ◽  
Thermal Annealing ◽  
Electrochemical Impedance ◽  
Oxidative Polymerization ◽  
Reduction Process ◽  
Absorption Bands ◽  
E Coli ◽  
Sensor Performance ◽  
Vis Spectroscopy ◽  
Nanocomposite Thin Films

PANI-Ag-Fe nanocomposite thin films based electrochemicalE. colisensor was developed with thermal annealing. PANI-Ag-Fe nanocomposite thin films were prepared by oxidative polymerization of aniline and the reduction process of Ag-Fe bimetallic compound with the presence of nitric acid and PVA. The films were deposited on glass substrate using spin-coating technique before they were annealed at 300°C. The films were characterized using XRD, UV-Vis spectroscopy, and FESEM to study the structural and morphological properties. The electrochemical sensor performance was conducted usingI-Vmeasurement electrochemical impedance spectroscopy (EIS). The sensitivity upon the presence ofE. coliwas measured in clean water andE. colisolution. From XRD analysis, the crystallite sizes were found to become larger for the samples after annealing. UV-Vis absorption bands for samples before and after annealing show maximum absorbance peaks at around 422 nm–424 nm and 426 nm–464 nm, respectively. FESEM images show the diameter size for nanospherical Ag-Fe alloy particles increases after annealing. The sensor performance of PANI-Ag-Fe nanocomposite thin films uponE. colicells in liquid medium indicates the sensitivity increases after annealing.

scholarly journals One-step preparation of nitrogen doped titanium oxide/Au/reduced graphene oxide composite thin films for photocatalytic applications

RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 49771-49779 ◽  
Author(s):  
A. Datcu ◽  
L. Duta ◽  
A. Pérez del Pino ◽  
C. Logofatu ◽  
C. Luculescu ◽  
...  
Keyword(s):  
Thin Films ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Pulsed Laser ◽  
Laser Evaporation ◽  
Nitrogen Doped ◽  
Reduced Graphene ◽  
Nanocomposite Thin Films ◽  
One Step ◽  
Photocatalytic Applications

Titanium dioxide (TiO2) and TiO2/Au/reduced graphene oxide nanocomposite thin films were grown by ultraviolet matrix assisted pulsed laser evaporation in controlled O2 or N2 atmospheres.

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