CO2 bubble assisted layer-by-layer self-assembly of graphene oxide multilayer film

2017 ◽  
Vol 533 ◽  
pp. 76-80 ◽  
Author(s):  
Jiwoong Heo ◽  
Hyejoong Jeong ◽  
Jinkee Hong
Keyword(s):  
Graphene Oxide ◽  
Self Assembly ◽  
Multilayer Film ◽  
Layer By Layer

scholarly journals Direct Patterning and Spontaneous Self-Assembly of Graphene Oxide via Electrohydrodynamic Jet Printing for Energy Storage and Sensing

Micromachines ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 13 ◽  
Author(s):  
Bin Zhang ◽  
Jaehyun Lee ◽  
Mincheol Kim ◽  
Naeeung Lee ◽  
Hyungdong Lee ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
Self Assembly ◽  
High Performance ◽  
Three Dimensional ◽  
Chemical Properties ◽  
Layer By Layer ◽  
Energy Storage Devices ◽  
Laminar Structure ◽  
Jet Printing

The macroscopic assembly of two-dimensional materials into a laminar structure has received considerable attention because it improves both the mechanical and chemical properties of the original materials. However, conventional manufacturing methods have certain limitations in that they require a high temperature process, use toxic solvents, and are considerably time consuming. Here, we present a new system for the self-assembly of layer-by-layer (LBL) graphene oxide (GO) via an electrohydrodynamic (EHD) jet printing technique. During printing, the orientation of GO flakes can be controlled by the velocity distribution of liquid jet and electric field-induced alignment spontaneously. Closely-packed GO patterns with an ordered laminar structure can be rapidly realized using an interfacial assembly process on the substrates. The surface roughness and electrical conductivity of the LBL structure were significantly improved compared with conventional dispensing methods. We further applied this technique to fabricate a reduced graphene oxide (r-GO)-based supercapacitor and a three-dimensional (3D) metallic grid hybrid ammonia sensor. We present the EHD-assisted assembly of laminar r-GO structures as a new platform for preparing high-performance energy storage devices and sensors.

Spray-assisted layer-by-layer self-assembly of tertiary-amine-stabilized gold nanoparticles and graphene oxide for efficient CO2 capture

2020 ◽  
Vol 601 ◽  
pp. 117905 ◽  
Author(s):  
Jiwoong Heo ◽  
Moonhyun Choi ◽  
Daheui Choi ◽  
Hyejoong Jeong ◽  
Hyun Young Kim ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Co2 Capture ◽  
Tertiary Amine ◽  
Self Assembly ◽  
Layer By Layer

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.

A wearable and highly sensitive strain sensor based on a polyethylenimine–rGO layered nanocomposite thin film

2017 ◽  
Vol 5 (31) ◽  
pp. 7746-7752 ◽  
Author(s):  
Xueliang Ye ◽  
Zhen Yuan ◽  
Huiling Tai ◽  
Weizhi Li ◽  
Xiaosong Du ◽  
...  
Keyword(s):  
Thin Film ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Self Assembly ◽  
Strain Sensor ◽  
Layer By Layer ◽  
Nanocomposite Thin Film ◽  
Assembly Method ◽  
Reduced Graphene ◽  
Highly Sensitive

A novel strain sensor based on reduced graphene oxide with ultra-sensitive and ultra-durable performance was fabricated by the chemical layer-by-layer self-assembly method.

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.

Carbon Nanotubes-Assisted Fabrication of TiO2 Nanocomposite Film for Optimum Electrochromic Application

2014 ◽  
Vol 989-994 ◽  
pp. 789-792
Author(s):  
Shu Ping Liu ◽  
Wei Wang ◽  
Lin Lin Cui ◽  
Hua Nan Guan
Keyword(s):  
Carbon Nanotubes ◽  
Self Assembly ◽  
Multilayer Film ◽  
Great Promise ◽  
Layer By Layer ◽  
Electrochromic Devices ◽  
Optical Contrast ◽  
Coloration Efficiency ◽  
Assembly Method

Electrochromic composite film consisting of TiO2, chitosan (CS) and carbon nanotubes (CNTs) were fabricated on quartz and FTO substrates by the layer-by-layer self-assembly method (LbL). The multilayer film was characterized by UV-vis spectrum, scanning electron microscopy (SEM), cyclic voltammetry (CV) and chronoamperometric (CA) and in situ spectral electrochemicalmeasurements. The composite material shows high electrochromic performance, with the optical contrast of 11.5% and coloration efficiency of 21.7 cm2/C at 800 nm. The results indicate great promise for the TiO2-based film as a potential material in electrochromic devices.

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