Preparation of CPC-Fe3O4-MMT/PEG Magnetic Films via Layer-by-Layer Assembly under the Assistance of Magnetic Field

2016 ◽  
Vol 852 ◽  
pp. 1034-1038
Author(s):  
Li Nan Xu ◽  
Shu Chen Tu ◽  
Feng Zhu Lv ◽  
Qi An ◽  
Yi He Zhang
Keyword(s):  
Magnetic Field ◽  
Self Assembly ◽  
Present Method ◽  
Multilayer Film ◽  
Composite Films ◽  
Deposition Efficiency ◽  
Magnetic Films ◽  
Layer By Layer ◽  
Film Fabrication ◽  
Layer Assembly

Polyethylene glycol (PEG), which was not a traditional building block of layer by layer (LBL) self-assembly, was used to fabricate multilayer films by the combination of LBL and magnetic field induction. The UV-abs absorbance of the composite films increases linearly with the number of bilayers, indicating uniform fabrication of each layer. By this method, the multilayers can consist of up to 15 bilayers. The applied magnetic field not only enhances the compactness of the CPC-Fe3O4-MMT, but also improves the deposition efficiency of the films. The present method can be an effective method for multilayer film fabrication from non polyelectrolyte.

scholarly journals Layer-by-layer self-assembly for controlled magnetic multilayer thin film fabrication

e-Polymers ◽  
2015 ◽  
Vol 15 (1) ◽  
pp. 25-32
Author(s):  
Jin Luo ◽  
Yanhua Wang ◽  
Rong Ren ◽  
Weilin Sun ◽  
Zhiquan Shen
Keyword(s):  
Magnetic Field ◽  
Infrared Spectroscopy ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Self Assembly ◽  
Multilayer Film ◽  
Layer By Layer ◽  
Magnetic Multilayer ◽  
Vis Spectroscopy ◽  
The Magnetic Field

AbstractThe copolymer poly[4′-(4-methacryloyphenyl)-2,2′:6′,2″-terpyridine-co-N-(vinylbenzylimino)-diacetic acid] [P(mPhtpy-co-vbda)] was synthesized by the RAFT (reversible addition fragmentation chain transfer) polymerization method and confirmed by Fourier transform infrared spectroscopy and 1H nuclear magnetic resonance spectroscopy. The bimetallic complexes of the copolymer were prepared by chelating with Nd3+ and Co2+. The magnetic multilayer film was fabricated via layer-by-layer (LbL) self-assembly with the copolymer and metal ions (Nd3+ and Co2+). Attenuated total reflectance-infrared spectroscopy and UV-Vis spectroscopy were used to characterize the film, indicating that the driving force for fabricating the multilayer film was the coordination interaction. The magnetic behavior of the complexes and the film was measured as a function of the magnetic field strength (0–50 kOe) at 5 K and also of the temperature (5–300 K) at the magnetic field strength (30 kOe). The magnetic hysteresis loops of the complexes and the film showed the typical “S” shape at 5 K, exhibiting the properties of soft ferromagnetic materials.

Layer-by-Layer Self-Assembly: Toward Magnetic Films with Tunable Anisotropy

2015 ◽  
Vol 119 (23) ◽  
pp. 13215-13223 ◽  
Author(s):  
Wenying Shi ◽  
Ruizheng Liang ◽  
Simin Xu ◽  
Yanming Wang ◽  
Chaojie Luo ◽  
...  
Keyword(s):  
Self Assembly ◽  
Magnetic Films ◽  
Layer By Layer

Compact film fabrication of porous coordination polymer Co3[Co(CN)6]2 and its reversible vapochromic behavior

2016 ◽  
Vol 45 (25) ◽  
pp. 10249-10255 ◽  
Author(s):  
Hua-Yu Tang ◽  
Zhenyu Chu ◽  
Cui-Ping Li ◽  
Xiao-Ming Ren ◽  
Chen Xue ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Layer By Layer ◽  
Organic Vapors ◽  
Layer By Layer Assembly ◽  
Highly Sensitive ◽  
Porous Coordination Polymer ◽  
Vapochromic Behavior ◽  
Film Fabrication ◽  
Layer Assembly

The compact films of porous coordination polymer Co3[Co(CN)6]2, fabricated using a layer-by-layer assembly approach, are highly sensitive to organic vapors and the vapochromic process is reproducible and reversible.

Luminescent multilayer film based on mixed-addenda polyoxometalates and polyethyleneimine by layer-by-layer assembly

2004 ◽  
Vol 233 (1-4) ◽  
pp. 14-19 ◽  
Author(s):  
Huiyuan Ma ◽  
Jun Peng ◽  
Baibin Zhou ◽  
Zhangang Han ◽  
Yuhua Feng
Keyword(s):  
Multilayer Film ◽  
Layer By Layer ◽  
Layer By Layer Assembly ◽  
Layer Assembly

Catalytic Oxidation of NADH on Gold Electrode Modified by Layer-by- Layer Self-Assembly of Thermostable Diaphorase and Redox Polymer

2011 ◽  
Vol 675-677 ◽  
pp. 231-234 ◽  
Author(s):  
Wen Juan Zheng ◽  
Hai Tao Zheng ◽  
Tao Sun ◽  
Pu Liu ◽  
Shinichiro Suye
Keyword(s):  
Self Assembly ◽  
Multilayer Structure ◽  
Gold Electrode ◽  
Multilayer Film ◽  
Water Soluble ◽  
Current Response ◽  
Layer By Layer ◽  
Redox Polymer ◽  
Relative Response ◽  
Reduced Nicotinamide Adenine Dinucleotide

A redox polymer, poly(ethylenimine)ferrocene (PEI-Fc) was synthesized by attaching ferrocene groups to the backbone of water soluble poly(ethylenimine), and multilayer film in nanoscale was assembled on gold electrode by alternate layer-by-layer adsorption (LBL) of the positively charged PEI-Fc and the negatively charged thermostable diaphorase (DI) from B.Stearothermophilus. The LBL process was monitored and analyzed by quartz crystal microbalance (QCM) technique, which confirmed the formation of the multilayer structure. The electrochemical oxidation of coenzyme (reduced nicotinamide adenine dinucleotide, NADH) was observed on the electrode fabricated with PEI-Fc/DI multilayer film, and the influence of layer number on current response was investigated. The modified electrode retained ca. 65% relative response after storage in buffer for two months and 50% relative response after incubation at 80 °C for 3 min, which inferred that the multilayer structure was unique stable. A NAD-dependent glucose-6-phosphate dehydrogenase (G6PDH) was also immobilized via the same LBL technique, and electrode modified with PEI-Fc/DI/G6PDH film exhibited current response to glucose-6- phosphate in the presence of free NAD+.

Layer-by-layer self-assembled laminin/fucoidan films: towards better hemocompatibility and endothelialization

RSC Advances ◽  
2016 ◽  
Vol 6 (61) ◽  
pp. 56048-56055 ◽  
Author(s):  
Yan Wang ◽  
Changrong Ye ◽  
Hong Su ◽  
Juan Wang ◽  
Yanan Wang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Multilayer Film ◽  
Layer By Layer ◽  
Assembly Technique ◽  
Self Assembled

The laminin/fucoidan multilayer film is prepared on glass via layer-by-layer self-assembly technique and monitored the assembled process by QCM-D. This film can inhibit platelets adhesion and improve ECs and EPCs adhesion.

Sign in / Sign up

Export Citation Format

Share Document