Multilayer Coating Method for Investigating Channel-Wall Erosion in a Hall Thruster

2013 ◽  
Vol 29 (1) ◽  
pp. 278-282 ◽  
Author(s):  
Shinatora Cho ◽  
Shigeru Yokota ◽  
Kimiya Komurasaki ◽  
Yoshihiro Arakawa
Keyword(s):  
Channel Wall ◽  
Multilayer Coating ◽  
Hall Thruster ◽  
Coating Method

A 200-W permanent magnet Hall thruster discharge with graphite channel wall

2018 ◽  
Vol 382 (42-43) ◽  
pp. 3079-3082 ◽  
Author(s):  
Yongjie Ding ◽  
Hong Li ◽  
Hezhi Sun ◽  
Liqiu Wei ◽  
Boyang Jia ◽  
...  
Keyword(s):  
Permanent Magnet ◽  
Channel Wall ◽  
Hall Thruster

Influence of the Magnetic Field Topology on Hall Thruster Discharge Channel Wall Erosion

2012 ◽  
Vol 22 (3) ◽  
pp. 4904105-4904105 ◽  
Author(s):  
Chang Liu ◽  
Zuo Gu ◽  
Kan Xie ◽  
Yunkui Sun ◽  
Haibin Tang
Keyword(s):  
Magnetic Field ◽  
Channel Wall ◽  
Discharge Channel ◽  
Hall Thruster ◽  
Magnetic Field Topology ◽  
The Magnetic Field

Simulation of discharge channel wall erosion in Hall thruster

2011 ◽  
Vol 23 (10) ◽  
pp. 2757-2762
Author(s):  
李敏 Li Min ◽  
汤海滨 Tang Haibin ◽  
王立君 Wang Lijun ◽  
郭宁 Guo Ning ◽  
李娟 Li Juan ◽  
...  
Keyword(s):  
Channel Wall ◽  
Discharge Channel ◽  
Hall Thruster

Multilayer coating method for x-ray reflectivity enhancement of polysilicon micro-mirrors at 1.54-Å wavelength

2005 ◽  
Author(s):  
Marie K. Tripp ◽  
Francois Fabreguette ◽  
Cari F. Herrmann ◽  
Steven M. George ◽  
Victor M. Bright
Keyword(s):  
Multilayer Coating ◽  
X Ray ◽  
Coating Method

scholarly journals NANOCOATING OF POLYESTER FABRIC WITH GRAPHENE OXIDE

2019 ◽  
Vol 2019 ◽  
pp. 78-81
Author(s):  
Beyza DOĞAN ◽  
Şule Sultan UĞUR ◽  
Banu TÜRKASLAN
Keyword(s):  
Graphene Oxide ◽  
Multilayer Coating ◽  
Reduction Process ◽  
Polyester Fabric ◽  
Layer By Layer ◽  
Measuring Device ◽  
Hummers Method ◽  
Coating Method ◽  
Fabric Surface ◽  
Layer Coating

GO is easily dispersed in solvents, dielectric property, transparency, electronic features can be adjusted due to the superior mechanical properties and areas of use are expanding day by day. In this study, graphene oxide was obtained from graphite by using modified Hummers method and then applied to polyester fabric surface according to multilayer coating method. Contrary to the traditional Hummers method in the literature, this study was carried out without the use of NaNO₃ in order to be environmentally friendly. Based on the Layer-by-Layer coating method, GO based nano films have been applied to the polyester fabric surface. After obtaining the GO based nanocomposite polyester fabrics, it was treated with Na₂S₂O₄ and NaBH₄ in order to obtain RGO structure and GO reduction was achieved. A thin coating layer was observed in SEM analysis of the reduced graphene oxide (RGO) and GO coated fabrics. In the EDS analysis, increase in the amount of C and the decrease in the amount of O were determined after the reduction process. The most striking feature of graphene oxide was applied to all fabrics with a 4-probe measuring device and the best result was observed in the polyester fabric which was coated with Na₂S₂O₄ in 10 layer 5 minutes with Layer-by-Layer coating method with 1.47 × 1̄0 ³ S/cm².

scholarly journals Ultra-stable near-infrared Tm3+-doped upconversion nanoparticles for in vivo wide-field two-photon angiography with a low excitation intensity

2019 ◽  
Vol 12 (03) ◽  
pp. 1950013 ◽  
Author(s):  
Wen Liu ◽  
Runze Chen ◽  
Sailing He
Keyword(s):  
Power Density ◽  
Near Infrared ◽  
Multilayer Coating ◽  
Excitation Power ◽  
Whole Body ◽  
Upconversion Nanoparticles ◽  
Excitation Power Density ◽  
Two Photon ◽  
Coating Method

Two-photon luminescence with near-infrared (NIR) excitation of upconversion nanoparticles (NPs) is of great importance in biological imaging due to deep penetration in high-scattering tissues, low auto-luminescence and good sectioning ability. Unfortunately, common two-photon luminescence is in visible band with an extremely high exciation power density, which limits its application. Here, we synthesized NaYF4:Yb[Formula: see text]Tm@NaYF4 upconversion NPs with strong two-photon NIR emission and a low excitation power density. Furthermore, NaYF4:Yb[Formula: see text]Tm@NaYF4@SiO2@OTMS@F127 NPs with high chemical stability were obtained by a modified multilayer coating method which was applied to upconversion NPs for the first time. In addition, it is shown that the as-prepared hydrophillic upconversion NPs have great biocompatibility and kept stable for 6 hours during in vivo whole-body imaging. The vessels with two-photon luminescence were clear even under an excitation power density as low as 25[Formula: see text]mW[Formula: see text]cm2. Vivid visualizations of capillaries and vessels in a mouse brain were also obtained with low background and high contrast. Because of cheaper instruments and safer power density, the NIR two-photon luminescence of NaYF4:Yb[Formula: see text]Tm@NaYF4 upconversion NPs could promote wider application of two-photon technology. The modified multilayer coating method could be widely used for upconversion NPs to increase the stable time of the in vivo circulation. Our work possesses a great potential for deep imaging and imaging-guided treatment in the future.

Sign in / Sign up

Export Citation Format

Share Document