On the surface roughness and hydrophobicity of dual-size double-layer silica nanoparticles

2013 ◽  
Vol 48 (18) ◽  
pp. 6115-6120 ◽  
Author(s):  
Thushara J. Athauda ◽  
Wesley Williams ◽  
Kenneth P. Roberts ◽  
Ruya R. Ozer
Keyword(s):  
Surface Roughness ◽  
Silica Nanoparticles ◽  
Double Layer

Synthesis of silica nanoparticles with controllable surface roughness for therapeutic protein delivery

2015 ◽  
Vol 3 (43) ◽  
pp. 8477-8485 ◽  
Author(s):  
Yuting Niu ◽  
Meihua Yu ◽  
Jun Zhang ◽  
Yannan Yang ◽  
Chun Xu ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Silica Nanoparticles ◽  
Protein Delivery ◽  
Therapeutic Protein ◽  
Antibody Delivery

Silica nanoparticles with controllable surface roughness have been successfully prepared for therapeutic anti-pAkt antibody delivery.

Double Layer Processes of LBMO/YBCO and Crystalline Degradations

2005 ◽  
Vol 887 ◽  
Author(s):  
Hong Zhu ◽  
Masanori Okada ◽  
Hidetaka Nakashima ◽  
Ajay K. Sarkar ◽  
Hirofumi Yamasaki ◽  
...  
Keyword(s):  
Thin Films ◽  
Surface Roughness ◽  
Double Layer ◽  
Ion Beam ◽  
Double Layers ◽  
Layer Surface ◽  
Ion Beam Sputtering ◽  
Minimum Surface ◽  
Layer Deposition ◽  
Beam Sputtering

ABSTRACTDouble Layer Processes of LBMO/YBCO and Crystalline Degradations Oxide microwave devices will be widely expected in mobile communication system in the near future in the world. Superconducting YBa2Cu3Ox (YBCO) thin films are most advisable for microwave filter devices due to their very low surface resistance. Next generation devices are tunable microwave filters formed by double layers consisting of YBCO and ferromagnetic manganites such as La(Ba)MnO3 (LBMO).In order to complete excellent double layers, we must first obtain proper techniques to fabricate perfect a/c-phases of YBCO and excellent crystalline LBMO single layers on substrate at low substrate temperatures (Ts), and then fabricate their double layers. We have tried an ion beam sputtering (IBS), then now we can control the perfect a-c orientation growths of YBCO. The minimum surface roughness is 1 nm for the c-phase and 0.3 nm for the a-phase.Excellent crystalline thin films of LBMO can be grown by IBS with controlling Ts, oxygen pressure (Po) and oxygen molecular or plasma supply on MgO and LAO substrates. It can be grown down to 480 deg C. The minimum rocking half-width is 0.01 deg, and the minimum surface roughness is 0.8 nm. As-grown LBMO film shows different metal-insulator transition and Curier temperatures. The results are interpreted by a phase separation and magnetostriction.The double layers of YBCO on LBMO and LBMO on YBCO were fabricated by IBS. In YBCO/LBMO, the excellent a/c-YBCO can be grown on the underlying LBMO at 600-650 °C. The crystallinity of overlying YBCO is nearly the same with that of the single layers on MgO and LAO. The mosaicity of YBCO is much better than that of the single layers on MgO and LAO. It is noticed that the underlying LBMO crystallinity can be improved, and the mosaicity is not degraded after the double layer deposition. A n inferiority is that the double layer surface is much degraded. Then we should fabricate the smooth underlying LBMO. In LBMO/YBCO, the excellent crystalline LBMO can be grown on the underlying a/c-YBCO at 650-700 deg C. The better crystalline LBMO grows on the better crystalline YBCO. The LBMO/a-YBCO clearly shows XRD peak separations while the LBMO/c-YBCO shows peak overlappings. The crystallinity of overlying LBMO is slightly poorer that that of the single layers on LAO. The mosaicity of LBMO is much poorer than that of the single layers of LBMO on LAO, but is almost the same with that of the underlying YBCO. It should be noticed that the crystallinity of underlying YBCO is degraded considerably after the double layer deposition. Then we should deposite the overlying LBMO at low temperatures. However a superiority is that the double layer surface is not degraded or rather improved. Now we are estimating time-dependence of the crystalline degradations on the single and double layers. YBCO crystallinity is easily degraded with time but LBMO is very stable. Then LBMO/YBCO is advisable in terms of a long term degradation.

Improved properties of corn fiber-reinforced polylactide composites by incorporating silica nanoparticles at interfaces

2019 ◽  
Vol 28 (3) ◽  
pp. 170-179 ◽  
Author(s):  
Honglin Luo ◽  
Zhiwei Yang ◽  
Fanglian Yao ◽  
Wei Li ◽  
Yizao Wan
Keyword(s):  
Mechanical Properties ◽  
Surface Roughness ◽  
Crack Propagation ◽  
Silica Nanoparticles ◽  
Industrial Applications ◽  
Corn Fiber ◽  
Great Promise ◽  
Fiber Reinforced ◽  
Novel Strategy

In this work, we report a novel strategy for improving the interfacial nature in corn fiber/polylactide (CRF/PLA) composites by directly applying a sizing containing silica nanoparticles on the surface of CRFs. This results in enhanced mechanical properties of the CRF/PLA composites. These improvements can be mainly attributed to the presence of silica nanoparticles on CRF-PLA interfaces, which act to resist the crack propagation. The increased surface roughness of CRFs from incorporated silica nanoparticles may also contribute to the enhanced mechanical properties. This simple methodology can be easily scaled up and thus shows great promise in industrial applications.

Surface Roughness: A Crucial Factor To Robust Electric Double Layer Capacitors

2020 ◽  
Vol 12 (5) ◽  
pp. 5786-5792 ◽  
Author(s):  
Jishi Wei ◽  
Yongbin Li ◽  
Dongmei Dai ◽  
Fengtao Zhang ◽  
Hongli Zou ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Double Layer ◽  
Electric Double Layer ◽  
Double Layer Capacitors ◽  
Electric Double Layer Capacitors

Distortion of Chronopotentiograms from Double Layer and Surface Roughness Effects

1961 ◽  
Vol 33 (10) ◽  
pp. 1438-1439 ◽  
Author(s):  
F. C. Anson ◽  
W. H. Reinmuth
Keyword(s):  
Surface Roughness ◽  
Double Layer ◽  
Roughness Effects

Photocatalytic Degradation of Gaseous Acetone by a Self-Prepared Nano-Sized Composite TiO2/In2O3/SnO2 Film Photocatalyst

2011 ◽  
Vol 287-290 ◽  
pp. 1581-1584 ◽  
Author(s):  
Chung Shin Yuan ◽  
Hsieh Hung Tsai ◽  
Jeng Fong Wu ◽  
Bo Cheng Guo ◽  
Chung Hsuang Hung
Keyword(s):  
Surface Roughness ◽  
Photocatalytic Degradation ◽  
Blue Light ◽  
Double Layer ◽  
Reaction Rates ◽  
Experimental Results ◽  
Vacuum Pressure ◽  
Operating Parameters ◽  
Photocatalytic Reactor ◽  
Layer Film

The objective of this study is to decompose gaseous acetone ((CH3)2CO) by a self-prepared nano-sized composite TiO2/In2O3/SnO2 film photocatalyst that was prepared by a multi-target vacuum sputter operating at a vacuum pressure of 3 mtorr. The operating parameters investigated for the sputtering process included oxygen to argon ratio (O2/Ar), sputtering temperature, substrate materials, substrate layers, and sputtering duration. The nano-sized composite TiO2/In2O3/SnO2 film photocatalyst was mainly composed of anatase with a few rutile. The surface roughness of the TiO2/In2O3/SnO2 film photocatalyst in terms of RMS ranged from 2.292 to 7.533 nm, while the thickness of the single- and double-layer film photocatalysts were 473.5 and 506.0 nm, respectively. Gaseous acetone was initially injected into and further degraded in a self-designed batch photocatalytic reactor containing the nano-sized composite TiO2/In2O3/SnO2 film photocatalyst. Experimental results indicated that the highest acetone degradation efficiency of 99.9% was obtained at 50°C and 1 atm with the incident of near-UV illuminated by a fluorescent black light lamp. Under the incidence of blue light (430-500 nm), the reaction rates of acetone decomposition were 2.353x10-5 and 3.478x10-5 μmole/cm2-sec for using single- and double-layer TiO2/In2O3/SnO2 film photocatalysts, respectively.

Adsorption of methylene blue on silica nanoparticles: Modelling analysis of the adsorption mechanism via a double layer model

2020 ◽  
Vol 319 ◽  
pp. 114348 ◽  
Author(s):  
Zichao Li ◽  
Lotfi Sellaoui ◽  
Saber Gueddida ◽  
Guilherme Luiz Dotto ◽  
Abdelmottaleb Ben Lamine ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Silica Nanoparticles ◽  
Double Layer ◽  
Adsorption Mechanism ◽  
Layer Model ◽  
Modelling Analysis ◽  
Double Layer Model
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