Magnetic Responses of Divinylbenzene-Fe3O4 Composite Film Deposited by Free Radical Polymerization Method

Akay, Sertan Kemal; Peksöz, Ahmet; Kara, Ali

doi:10.1007/s10948-017-4249-4

Cited by 7 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At a microscale, magnetic force microscopy (MFM) provides evidence for the distribution of magnetism by measuring the magnetostatics coupling between a magnetized probe-tip and the surface of the sample. In this case, the separation of the adhesive materials and the tape can result in bond cleavage that can generate surface radicals that can be visualized by MFM. , As a result, the surface of the a-IGZO film without MCT treatment and little surface magnetism was reversed after MCT treatment, as shown in Figure b. Similarly, the charge distribution of the surface was confirmed by Kelvin force microscopy (KFM) analysis.…”

Section: Resultsmentioning

confidence: 84%

Mechanochemical and Thermal Treatment for Surface Functionalization to Reduce the Activation Temperature of In-Ga-Zn-O Thin-film Transistors

Lee

Tak

Kang

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Amorphous indium-gallium-zinc oxide (a-IGZO) films, which are widely regarded as a promising material for the channel layer in thin-film transistors (TFTs), require a relatively high thermal annealing temperature to achieve switching characteristics through the formation of metal–oxygen (M–O) bonding (i.e., the activation process). The activation process is usually carried out at a temperature above 300 °C; however, achieving activation at lower temperatures is essential for realizing flexible display technologies. Here, a facile, low-cost, and novel technique using cellophane tape for the activation of a-IGZO films at a low annealing temperature is reported. In terms of mechanochemistry, mechanical pulling of the cellophane tape induces reactive radicals on the a-IGZO film surface, which can give rise to improvements in the properties of the a-IGZO films, leading to an increase in the number of M–O bonds and the carrier concentration via radical reactions, even at 200 °C. As a result, the a-IGZO TFTs, compared to conventionally annealed a-IGZO TFTs, exhibited improved electrical performances, such as mobility, on/off current ratio, and threshold voltage shift (under positive bias temperature and negative bias temperature stress for 10,000 s at 50 °C) from 8.25 to 12.81 cm2/(V·s), 2.85 × 107 to 1.21 × 108, 6.81 to 3.24 V, and −6.68 to −4.93 V, respectively.

show abstract

Section: Resultsmentioning

confidence: 84%

Mechanochemical and Thermal Treatment for Surface Functionalization to Reduce the Activation Temperature of In-Ga-Zn-O Thin-film Transistors

Lee

Tak

Kang

et al. 2020

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The coating and surfactant were only done for observing the functional groups by using Fourier transform infrared (FTIR) spectroscopy [13]. Magnetic characterization was carried out by Riken Denshi Co. Ltd. Vibrating sample magnetometer (VSM) under external magnetic fields up to ±15000 Oe at room temperature [14]. The size and morphology were investigated by means of transmission electron microscopy (TEM) using JEOL JEM-1400 [15].…”

Section: Experiments Detailsmentioning

confidence: 99%

A synthesis of polyethylene glycol (PEG)-coated magnetite Fe₃O₄ nanoparticles and their characteristics for enhancement of biosensor

Antarnusa

Suharyadi

2020

Mater. Res. Express

View full text Add to dashboard Cite

The magnetite Fe 3 O 4 nanoparticles were synthesized by using chemical co-precipitation method and these nanoparticles were successfully coated by polyethylene glycol (PEG) with variation concentrations of PEG. The magnetite Fe 3 O 4 nanoparticles used as a bimolecular label (nano-tags), exhibiting a soft magnetic behavior with magnetization (M s ) of 77.16 emu g −1 and coercivity (H c ) of 50 Oe respectively. The polyethylene glycol (PEG) was used as a biocompatible polymer. The x-ray diffraction (XRD) patterns of the Fe 3 O 4 showed that Fe 3 O 4 was well crystallized. It also confirmed the existence of invers spinel. The diffraction peak of 35.4°was used to calculate the crystallite size. The estimation of Fe 3 O 4 average crystallite size is 12 nm, while the PEG-coated Fe 3 O 4 nanoparticles is 8.6 nm. The transmission electron microscopy (TEM) images of Fe 3 O 4 showed that the morphology of magnetite Fe 3 O 4 nanoparticle is spherical in shape with uniform grain size and good dispersibility despite the agglomeration it found in some place. The addition of PEG can decrease the agglomeration and reduce the particle size. The existence of PEG layer on Fe 3 O 4 was confirmed by Fourier transform infrared (FTIR) spectroscopy. The result of Vibrating Sample Magnetometer (VSM) showed that saturation magnetization (M s ) of Fe 3 O 4 nanoparticles decreased from 77.16 to 37.15 emu g −1 with the increase of PEG weight from 0% to 50%. Such Fe 3 O 4 nanoparticles with favorable size and tunable magnetic properties are promising biosensor applications.

show abstract

“…One of the fundamental tasks of this direction is the strengthening of elastomers with dispersed fillers [1]. Metal-based fillers improve thermal and electrical conductivity, magnetic susceptibility, heat capacity, and other properties of polymer materials [2]. The properties of nano-objects can differ significantly from the properties of bulk materials of the same chemical composition [3].…”

Section: Introductionmentioning

confidence: 99%

Electron Spin Resonance Study of Magnetite Nanoparticles in iPP Matrix

2024

J Miner Sci Materials

View full text Add to dashboard Cite

Magnetite nanoparticles based polymer nanocomposites were prepared by blending in solution. The shape of the samples was formed by hot pressing technique. The morphology of the nanocomposites was investigated by transmission electron microscopy and energy dispersive spectroscopy techniques. iPP+Fe3 O4 nanocomposites’ electron spin resonance spectrum was also investigated. As concentration increased, so did the EPR signal’s intensity. Due to variations in the magnetic interaction’s strength, the linewidth and g-value also altered with concentration.

show abstract

Magnetic Responses of Divinylbenzene-Fe3O4 Composite Film Deposited by Free Radical Polymerization Method

Cited by 7 publications

References 28 publications

Mechanochemical and Thermal Treatment for Surface Functionalization to Reduce the Activation Temperature of In-Ga-Zn-O Thin-film Transistors

Mechanochemical and Thermal Treatment for Surface Functionalization to Reduce the Activation Temperature of In-Ga-Zn-O Thin-film Transistors

A synthesis of polyethylene glycol (PEG)-coated magnetite Fe₃O₄ nanoparticles and their characteristics for enhancement of biosensor

Electron Spin Resonance Study of Magnetite Nanoparticles in iPP Matrix

Contact Info

Product

Resources

About

Magnetic Responses of Divinylbenzene-Fe3O4 Composite Film Deposited by Free Radical Polymerization Method

Cited by 7 publications

References 28 publications

Mechanochemical and Thermal Treatment for Surface Functionalization to Reduce the Activation Temperature of In-Ga-Zn-O Thin-film Transistors

Mechanochemical and Thermal Treatment for Surface Functionalization to Reduce the Activation Temperature of In-Ga-Zn-O Thin-film Transistors

A synthesis of polyethylene glycol (PEG)-coated magnetite Fe3O4 nanoparticles and their characteristics for enhancement of biosensor

Electron Spin Resonance Study of Magnetite Nanoparticles in iPP Matrix

Contact Info

Product

Resources

About

A synthesis of polyethylene glycol (PEG)-coated magnetite Fe₃O₄ nanoparticles and their characteristics for enhancement of biosensor