scholarly journals Fabrication of Silver Nanowire/Polydimethylsiloxane Dry Electrodes by a Vacuum Filtration Method for Electrophysiological Signal Monitoring

ACS Omega ◽  
2020 ◽  
Vol 5 (18) ◽  
pp. 10260-10265 ◽  
Author(s):  
Ravinder Reddy Kisannagar ◽  
Pallavi Jha ◽  
Ambuja Navalkar ◽  
Samir K. Maji ◽  
Dipti Gupta
Keyword(s):  
Silver Nanowire ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Dry Electrodes ◽  
Signal Monitoring ◽  
Electrophysiological Signal

Environmentally responsive composite films fabricated using silk nanofibrils and silver nanowires

2018 ◽  
Vol 6 (47) ◽  
pp. 12940-12947 ◽  
Author(s):  
Jialin Liu ◽  
Tengyu He ◽  
Guangqiang Fang ◽  
Ranran Wang ◽  
Elbadawy A. Kamoun ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Humidity Sensor ◽  
Silver Nanowires ◽  
Composite Films ◽  
Silver Nanowire ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Environmentally Responsive

Two kinds of silk nanofibril/silver nanowire composite films were fabricated by using a facile vacuum-filtration method, and can act as a humidity sensor or a pressure sensor.

Influence of Impregnation-Vacuum Filtration Conditions on Ni Dispersion and Activity of Ni-Cordierite for Hydrogenation

2013 ◽  
Vol 781-784 ◽  
pp. 312-319
Author(s):  
Shao Wen Liu ◽  
Zhuo Long Guan ◽  
Lei Qing ◽  
Jiu Ling Chen ◽  
Hai Nan Wang ◽  
...  
Keyword(s):  
Solution Concentration ◽  
Catalytic Performance ◽  
Filtration Time ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Structured Catalysts ◽  
Preparation Conditions ◽  
Vacuum Degree ◽  
Close Relationship ◽  
Impregnation Time

The influence of the preparation conditions of the impregnation-vacuum filtration method was investigated systematically on the Ni dispersion and the activity of Ni-cordierite structured catalysts in hydrogenation of m-dinitrobenzene to m-phenylenediamine. H2-TPD measurement showed that the Ni dispersion has close relationship with the impregnation solution concentration of nickel nitrate, the impregnation time, the vacuum degree, the vacuum filtration time and the calcination temperature. The hydrogenation activity test and nitrogen physisorption investigation showed that the catalytic performance of Ni-cordierite is dependent upon the Ni dispersion and the chemisorption mode of m-dinitrobenzene on Ni particles.

scholarly journals Low Vacuum Filtration Method as an Alternative Extracellular Vesicle Concentration Method: Comparison with Ultracentrifugation and Differential Centrifugation

2020 ◽  
Author(s):  
Anna Drożdż ◽  
Agnieszka Kamińska ◽  
Magdalena Surman ◽  
Agnieszka Gonet-Surówka ◽  
Robert Jach ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Culture Media ◽  
Membrane Surface ◽  
Method Comparison ◽  
Environmental Scanning Electron Microscopy ◽  
Drug Carriers ◽  
Differential Centrifugation ◽  
Isolation Method ◽  
Filtration Method ◽  
Vacuum Filtration

Recent years brought great focus in the field of development of extracellular vesicles (EVs) based drug-delivery systems. Considering possible applications of EVs as a drug carriers the isolation process is a crucial step. To solve problems related with EV isolation, we created and validated a new EVs isolation method – Low Vacuum Filtration (LVF) and compared it with two commonly applied procedures - differential centrifugation (DC) and ultracentrifugation (UC). EVs isolated from endothelial cells culture media have been characterized by a) transmission electron microscopy (TEM) b) nanoparticle tracking analysis (NTA), c) western blot and d) Fourier-Transform Infrared Spectroscopy (FTIR). Additionally, the membrane surface have been imaged with Environmental Scanning Electron Microscopy (ESEM). We showed that LVF is reproducible and efficient method for EVs isolation form conditioned media. Additionally, we observed correlation between ATR-FTIR spectra quality and the EVs and proteins concentration. ESEM imaging confirmed that actual pore diameter are close to the values calculated theoretically. LVF method is an easy, fast and inexpensive EVs isolation method which allows for isolation of both ectosomes and exosomes from high volume sources with good repeatability. We think that it could be an efficient alternative for commonly applied methods.

Transfer Method of Carbon Nanotube Film for Embedded Transparent Electrode

2009 ◽  
Author(s):  
Kangwon Lee ◽  
Jung A. Lee ◽  
Kwang-Cheol Lee ◽  
Seung S. Lee
Keyword(s):  
Carbon Nanotube ◽  
Transparent Electrode ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Transfer Method ◽  
Photolithography Process ◽  
Polymer Mems ◽  
Peeling Off ◽  
Poor Adhesion ◽  
Si Wafer

We describe new transfer method of carbon nanotube (CNT) film onto the poly-dimethysiloxane (PDMS) based on the poor adhesion between Si wafer and Au layer. To combine the CNT film with the polymer-MEMS field, it is required to transfer CNT film onto the polymer substrates. CNT film was fabricated by vacuum filtration method and was transferred onto the Au-deposited Si wafer. Using photolithography process, CNT film was patterned and PDMS is pouring and curing on the wafer. After peeling off the PDMS, patterned CNT film was transferred which was embedded into the PDMS. The possibility of embedded CNT film in the micro system was demonstrated in the application of electro-thermal actuator.

Flexible Bi–Te-based alloy nanosheet/PEDOT:PSS thermoelectric power generators

2019 ◽  
Vol 3 (7) ◽  
pp. 1328-1334 ◽  
Author(s):  
Yong Du ◽  
Xin Liu ◽  
Jiayue Xu ◽  
Shirley Z. Shen
Keyword(s):  
Thermoelectric Power ◽  
Nanocomposite Films ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Power Generators ◽  
Alloy Particles

Herein, Bi–Te-based alloy nanosheet/poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) thermoelectric nanocomposite films were prepared by a vacuum filtration method after exfoliating Bi–Te-based alloy particles into nanosheets.

scholarly journals The Preparation and Study of Ethylene Glycol-Modified Graphene Oxide Membranes for Water Purification

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 188 ◽  
Author(s):  
Yang Zhang ◽  
Lin-Jun Huang ◽  
Jian-Guo Tang ◽  
Yao Wang ◽  
Meng-Meng Cheng ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Graphene Oxide ◽  
Water Purification ◽  
Interlayer Spacing ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
X Ray ◽  
Molecular Separation ◽  
Scanning Electron

In this work, graphene oxide (GO)/ethylene glycol (EG) membranes were designed by a vacuum filtration method for molecular separation and water purification. The composite membranes were characterized by scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The interlayer spacing of GO membranes (0.825 nm) and GO/EG membranes (0.634 nm) are measured by X-ray diffraction (XRD). Using the vacuum filtration method, the membrane thickness can be controlled by selecting the volume of the solution from which the membrane is prepared, to achieve high water permeance and high rejection of Rhodamine B (RhB). The membrane performance was evaluated on a dead-end filtration device. The water permeance and rejection of RhB of the membranes are 103.35 L m−2 h−1 bar−1 and 94.56% (GO), 58.17 L m−2 h−1 bar−1 and 97.13% (GO/EG), respectively. The permeability of GO/EG membrane is about 40 × 10−6 L m-1 h−1 bar−1. Compared with the GO membrane, the GO/EG membrane has better separation performance because of its proper interlayer spacing. In this study, the highest rejection of RhB (99.92%) is achieved. The GO/EG membranes have potential applications in the fields of molecular separation and water purification.

Properties of Freestanding Buckypapers with Monodispersion of Multi-Walled Carbon Nanotube Aqueous Solution

2013 ◽  
Vol 765-767 ◽  
pp. 3162-3165 ◽  
Author(s):  
Shao Wei Lu ◽  
Chun Xu Zhang ◽  
Xian Jun Zeng ◽  
Ji Jie Wang ◽  
Peng Nie ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotube ◽  
Volume Density ◽  
High Porosity ◽  
Filtration Method ◽  
Vacuum Filtration ◽  
Carbon Nanotube Dispersion ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotube ◽  
Nanotube Dispersion

The monodispersion situation of Multi-walled carbon nanotube dispersion is vital for fabricating high quality MWCNT buckypapers with vacuum filtration method. In this paper, the MWCNT buckypapers were fabricated by surfactants Triton-X100, sonication, centrifugation, vacuum filtration, rinsing and annealing processes. Transmission electron microscopy (TEM) and Zeta potential results show the maximum achievable separation has been reached. The properties of MWCNTs buckypaper can be characterized by Scanning electron microscopy (SEM), a four-point probe, N2 adsorption isotherm, TGA-DSC methods. The results showed that the buckypaper exhibits a low surface and volume density, a high porosity and electric conductivity. The pore diameter is up to 22.02nm, no substantial mass loss below 600°C in air.

Fabrication of Flexible Transparent Conductive Films with Silver Nanowire by Vacuum Filtration and PET Mold Transfer

2016 ◽  
Vol 32 (2) ◽  
pp. 158-161 ◽  
Author(s):  
Wei Xu ◽  
Qingsong Xu ◽  
Qijin Huang ◽  
Ruiqin Tan ◽  
Wenfeng Shen ◽  
...  
Keyword(s):  
Silver Nanowire ◽  
Vacuum Filtration ◽  
Transparent Conductive Films ◽  
Conductive Films
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