Versatile functional poly(3-hexylthiophene) for hybrid particles synthesis by the grafting onto technique: Core@shell ZnO nanorods

2013 ◽  
Vol 52 (1) ◽  
pp. 30-38 ◽  
Author(s):  
Hussein Awada ◽  
Hussein Medlej ◽  
Sylvie Blanc ◽  
Marie-Hélène Delville ◽  
Roger C. Hiorns ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Core Shell ◽  
Hybrid Particles ◽  
Grafting Onto

scholarly journals Improved Photoresponse Characteristics of a ZnO-Based UV Photodetector by the Formation of an Amorphous SnO2 Shell Layer

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6124
Author(s):  
Junhyuk Yoo ◽  
Uijin Jung ◽  
Bomseumin Jung ◽  
Wenhu Shen ◽  
Jinsub Park
Keyword(s):  
Shell Structure ◽  
Rise Time ◽  
Zno Nanorods ◽  
Wide Bandgap ◽  
Core Shell ◽  
Shell Layer ◽  
Slow Response ◽  
Uv Photodetector ◽  
Zno Nanostructure ◽  
Core Shell Structure

Although ZnO nanostructure-based photodetectors feature a well-established system, they still present difficulties when being used in practical situations due to their slow response time. In this study, we report on how forming an amorphous SnO2 (a-SnO2) shell layer on ZnO nanorods (NRs) enhances the photoresponse speed of a ZnO-based UV photodetector (UV PD). Our suggested UV PD, consisting of a ZnO/a-SnO2 NRs core–shell structure, shows a rise time that is 26 times faster than a UV PD with bare ZnO NRs under 365 nm UV irradiation. In addition, the light responsivity of the ZnO/SnO2 NRs PD simultaneously increases by 3.1 times, which can be attributed to the passivation effects of the coated a-SnO2 shell layer. With a wide bandgap (~4.5 eV), the a-SnO2 shell layer can successfully suppress the oxygen-mediated process on the ZnO NRs surface, improving the photoresponse properties. Therefore, with a fast photoresponse speed and a low fabrication temperature, our as-synthesized, a-SnO2-coated ZnO core–shell structure qualifies as a candidate for ZnO-based PDs.

Synthesis of ZnO@CuS Core–Shell Nanocomposites by Thermal Decomposition Method and Their Photocatalytic Application

2020 ◽  
Vol 20 (8) ◽  
pp. 5223-5238
Author(s):  
Vanita Sharma ◽  
P. Jeevanandam
Keyword(s):  
Thermal Decomposition ◽  
Photocatalytic Activity ◽  
Diphenyl Ether ◽  
Zno Nanorods ◽  
Core Shell ◽  
Shell Formation ◽  
Molecular Precursor ◽  
Photocatalytic Application ◽  
Ft Ir ◽  
Considerable Work

Considerable work is being carried out recently to develop nanomaterials which can act as photocatalyst under sunlight. In the present study, ZnO@CuS core–shell nanocomposites were synthesized and their photocatalytic activity has been investigated. The nanocomposites were prepared by thermal decomposition of a single molecular precursor, cyclo-tri-μ-thioacetamide-tris(chlorocopper(I)) complex ([Cu3TAA3Cl3]), in the presence of ZnO nanorods in diphenyl ether at 200 °C. The effect of reaction time and precursor concentration on copper sulfide shell formation have been investigated. The ZnO@CuS core–shell nanocomposites were characterized using different techniques such as XRD, FE-SEM, TEM, FT-IR, UV-Vis, DRS and XPS. As compared to bare ZnO nanorods, the ZnO@CuS nanocomposites show better photocatalytic activity towards degradation of congo red in an aqueous solution under sunlight.

scholarly journals Fabrication of ZnO@Ag3PO4 Core-Shell Nanocomposite Arrays as Photoanodes and Their Photoelectric Properties

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1254 ◽  
Author(s):  
Yi ◽  
Li ◽  
Wu ◽  
Chen ◽  
Yang ◽  
...  
Keyword(s):  
Performance Test ◽  
Structural Characteristics ◽  
Energy Dispersive Spectrometer ◽  
Zno Nanorods ◽  
Element Distribution ◽  
Core Shell ◽  
Photoelectric Properties ◽  
Component Test ◽  
Photoelectric Performance ◽  
Light Reflectance

In this study, we combine the methods of magnetron sputtering, hydrothermal growth, and stepwise deposition to prepare novel ZnO@Ag3PO4 core-shell nanocomposite arrays structure. Through scanning electron microscope (SEM) topography test, energy dispersive spectrometer (EDS) element test and X-ray diffractometry (XRD) component test, we characterize the morphology, element distribution and structural characteristics of ZnO@Ag3PO4 core-shell nanocomposite arrays structure. At the same time, we test the samples for light reflectance, hydrophilicity and photoelectric performance. We find that after deposition of Ag3PO4 on ZnO nanorods, light reflectance decreases. As the time of depositions increases, light reflectance gradually decreases. After the deposition of Ag3PO4, the surface of the sample shows super hydrophilicity, which is beneficial for the photoelectric performance test. Through the optical transient response test, we find that the photo-generated current reaches a maximum when a small amount of Ag3PO4 is deposited. As the time of depositions of Ag3PO4 increases, the photogenerated current gradually decreases. Finally, we conducted an alternating current (AC) impedance test and also verified the correctness of the photocurrent test. Therefore, the structure is expected to be prepared into a photoanode for use in fields such as solar cells.

One-step fabrication of polymeric hybrid particles with core–shell, patchy, patchy Janus and Janus architectures via a microfluidic-assisted phase separation process

RSC Advances ◽  
2015 ◽  
Vol 5 (97) ◽  
pp. 79969-79975 ◽  
Author(s):  
Xiaodong Cao ◽  
Wenxiu Li ◽  
Ting Ma ◽  
Hua Dong
Keyword(s):  
Phase Separation ◽  
Separation Process ◽  
Janus Particles ◽  
Core Shell ◽  
Hybrid Particles ◽  
Phase Separation Process ◽  
One Step

We report in this paper a one-step route for the preparation of core–shell, patchy, patchy Janus and Janus particles via a microfluidic-assisted phase separation process.

scholarly journals ZnO nanorods assembled with different porphyrins – size-tunable hybrid particles

RSC Advances ◽  
2017 ◽  
Vol 7 (6) ◽  
pp. 3321-3330 ◽  
Author(s):  
Jasmin Düring ◽  
Franziska Gröhn
Keyword(s):  
Solar Energy ◽  
Energy Conversion ◽  
Zno Nanorods ◽  
Solar Energy Conversion ◽  
Zno Nanorod ◽  
Hybrid Particles ◽  
Fundamental Study ◽  
Hybrid Assemblies

We present a fundamental study on ZnO nanorod–porphyrin assembly formation in solution, providing the key to novel tunable hybrid assemblies with potential in solar energy conversion.

Hydrophobic Performance of Core/Shell Nanoarrays Modified by Stearic Acid

2020 ◽  
Vol 15 (2) ◽  
pp. 264-268
Author(s):  
Hongxing Han ◽  
Lin Pan ◽  
Manying Zhang ◽  
Lei Zhao ◽  
Zhifeng Liu
Keyword(s):  
Contact Angle ◽  
Stearic Acid ◽  
Water Contact Angle ◽  
Zno Nanorods ◽  
Hydrophobic Surface ◽  
Optical Transmittance ◽  
Surface Hydrophobicity ◽  
Core Shell ◽  
Water Contact ◽  
Angle Measurements

In this paper, we successfully prepare hydrophobic surface of ZnO/ZnS nanorods arrays modified by stearic acid. The morphology, microstructure, optical transmittance and self-cleaning property are examined by SEM, XRD, UV-vis and water contact angle measurements, respectively. The ZnO/ZnS core/shell nanoarrays shows a higher value of water contact angle in compare with that of pure ZnO nanorods arrays. After treatment by stearic acid, the resulting ZnO/ZnS nanostructure exhibits the best hydrophobicity with water droplets about 146.5 . The results show that the surface hydrophobicity of ZnO/ZnS nanoarrays can be improved by using stearic acid with low-surface-energy.

Morphology and Photoluminescence of Zn/ZnO Core-Shell Structures by Water-Boiling Method

2013 ◽  
Vol 538 ◽  
pp. 242-245 ◽  
Author(s):  
Bao Gai Zhai ◽  
Qing Lan Ma ◽  
Rui Xiong ◽  
Yuan Ming Huang
Keyword(s):  
Zno Nanorods ◽  
Sem Analysis ◽  
Shell Structures ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Xrd Pattern ◽  
X Ray ◽  
Spherical Morphology ◽  
Uv Emission ◽  
Two Peaks

Zn/ZnO core-shell structured composites were firstly synthesized by water-boiling method using induction cooker and electric cooker. The synthesized Zn/ZnO core-shell structures were characterized with X-ray diffraction (XRD), scanning electronic microscopy (SEM) and photoluminescence (PL) spectrophotometer, respectively. The XRD pattern confirms that the shells of the Zn/ZnO core-shell composites are composed of wurtzite ZnO crystals. Based on SEM analysis, the Zn/ZnO core-shell structures formed by intermittent boiling under induction cooker show a tendency for spherical morphology with stacked and bending ZnO shells while the ones formed by continuous boiling under electric cooker exhibit a spherical morphology with the irregular ZnO nanorods on the surface of Zn spheres, and the continuous boiling under electric cooker can promote the peeling and regeneration of ZnO shells on the surface of Zn cores. The PL spectra of the Zn/ZnO core-shell structures have been recorded at room temperature and observed two peaks around 379 nm and 538 nm. However, the defect emission is much stronger than the UV emission in the Zn/ZnO core-shell structures synthesized under electric cooker.

Study of Polyacrylate Sizing Agents Modified by Ethanol/PSt and Nano-TiO2/PSt Core-Shell Hybrid Particles

2011 ◽  
Vol 332-334 ◽  
pp. 902-907 ◽  
Author(s):  
Xiao Jin ◽  
Jian Wei Cui
Keyword(s):  
Breaking Strength ◽  
High Surface ◽  
Sol Gel ◽  
Miniemulsion Polymerization ◽  
Adhesive Force ◽  
Nano Particles ◽  
Core Shell ◽  
Hybrid Particles ◽  
Sizing Agents ◽  
Two Hybrid

This paper stated the preparation of nano-TiO2 via Sol-Gel method and modification of nano-TiO2 by coupling agent—MPS. Then Ethanol/PSt and nano-TiO2/PSt core-shell hybrid particles were prepared via miniemulsion polymerization by using the cationic surfactant Cetyl Trimethylammonium Bromide as emulsifier and Cyclohexane as co-stabilizer. These two hybrid nano-particles were added to the sizing agent—SX-5 respectively, to determine the sizing agents’ adhesive force to Terylene (T) and Terylene/Cotton (T/C) yarns respectively via roving method. The breaking strength and hairiness number of T/C yarns were determined by single yarns’ sizing method. The adhesive force of T and T/C yarns, breaking strength and hairiness number of T/C ones, showed that small size effect, high fluidity, and high surface energy caused by large specific surface area of hybrid nano-latices would make a great contribution to sizing properties.

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