Combined Ruthenium Lead Surface Treatment of Gallium Arsenide Photoanodes

1980 ◽  
Vol 84 (6) ◽  
pp. 592-595 ◽  
Author(s):  
A. Heller ◽  
H. J. Lewerenz ◽  
B. Miller
Keyword(s):  
Gallium Arsenide ◽  
Surface Treatment

Influence of gallium arsenide surface treatment in selenium vapors on subsurface defects

2009 ◽  
Vol 52 (4) ◽  
pp. 411-416
Author(s):  
N. N. Bezryadin ◽  
G. I. Kotov ◽  
Yu. N. Vlasov ◽  
A. A. Starodubtsev ◽  
P. K. Bhatnagar ◽  
...  
Keyword(s):  
Gallium Arsenide ◽  
Surface Treatment ◽  
Subsurface Defects

Photoconductivity of semi-insulating gallium arsenide in the presence of a magnetic field

1969 ◽  
Vol 47 (24) ◽  
pp. 2789-2796 ◽  
Author(s):  
H. Milner-Brown ◽  
E. Fortin
Keyword(s):  
Magnetic Field ◽  
Gallium Arsenide ◽  
Simple Model ◽  
Surface Treatment ◽  
Sample Surface ◽  
Sample Thickness ◽  
Experimental Results ◽  
Theoretical Predictions ◽  
Temperature Surface

The effect of a magnetic field on the photoconductivity of GaAs has been investigated at 300 °K and 90 °K. The field deflects the photocarriers towards the surface or the volume of the sample, resulting in a decrease or an increase of the photocurrent. The effect is attributed to lifetime inhomogeneities across the sample thickness and has been studied as a function of temperature, surface treatment of the sample, and wavelength of excitation. The results can be expressed as the ratio R = ip+/ip−, where ip+ and ip− are the photocurrents when the carriers are deflected away or towards the sample surface respectively. For a sample mechanically polished, R = 10 at 300 °K and R = 40 at 90 °K while for a chemically polished sample R = 3.5 at 300 °K and R = 10 at 90 °K for B = 2.2 Wb/m2, V = 400 V, and λ excitation = 7500 Å. Independent measurements of the carrier mobilities and of their surface and bulk lifetimes have been performed to allow a direct comparison between experimental results and theoretical predictions based on a simple model.

Surface treatment with silver particles isles on Titanium cp: study of antimicrobial activity

2020 ◽  
Vol 9 (4) ◽  
pp. e27942662
Author(s):  
Patrícia Capellato ◽  
Cláudia Eliana Bruno Marino ◽  
Gilbert Silva ◽  
Lucas Victor Benjamim Vasconcelos ◽  
Rodrigo Perito Cardoso ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Surface Treatment ◽  
Titanium Surface ◽  
Silver Clusters ◽  
Silver Particles ◽  
Silver Deposition ◽  
Dispersed Particles ◽  
Significant Difference ◽  
Diffusion Assay ◽  
Antibacterial Potential

During the last decades, researchers have been growing the interest in surface treatment with an antimicrobial agent. Silver nanoparticles (AgNPs) are widely used in biomedical fields due to their potent antimicrobial activity. So, in this study was investigated silver particles (isles) coated on titanium surface for dental and orthopedic application. Silver particles coating process on titanium surface were performed via sputtering that is a plasma-assisted deposition technique with and titanium without treatment was applied as comparing standard. Plasma treatment parameters were optimized so that the result was not a thin film of Ag but dispersed particles of Ag on the Ti-cp surface. The alloy surfaces were investigated using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to investigate antibacterial potential Staphylococcus aureus and Escherichia coli have been used at Agar diffusion assay. The results were analyzed by analysis of variance (ANOVA) in order to verify significant difference antimicrobial activity between samples that have shown no difference between the surfaces studied treatments. For silver deposition scattered particles (isles) over titanium surface for a 10-minute treatment, EDS revealed by silver clusters that the particles were not properly scattered onto surface, hence, the low effectiveness in antibacterial activity.

Effect of Plasma Surface Treatment on Surface Energy and Adhesion Properties for Cr Coating on Substrates

2013 ◽  
Vol 51 (10) ◽  
pp. 735-741
Author(s):  
Dong-Yong Kim ◽  
Eun-Wook Jeong ◽  
Kwun Nam Hui ◽  
Youngson Choe ◽  
Jung-Ho Han ◽  
...  
Keyword(s):  
Surface Energy ◽  
Surface Treatment ◽  
Adhesion Properties ◽  
Plasma Surface ◽  
Plasma Surface Treatment ◽  
Cr Coating

Experimental Study on Plasma Surface Treatment of Capacitors Film

2008 ◽  
Vol 128 (5) ◽  
pp. 339-342
Author(s):  
Dai Ling ◽  
Yin Ting ◽  
Lin Fuchang ◽  
Yan Fei
Keyword(s):  
Experimental Study ◽  
Surface Treatment ◽  
Plasma Surface ◽  
Plasma Surface Treatment

Basic Study on Surface Treatment of Functional Resin Film by Pulsed Atmospheric Microplasma

2010 ◽  
Vol 130 (10) ◽  
pp. 858-864 ◽  
Author(s):  
Kazuo Shimizu ◽  
Akira Umeda ◽  
Shuichi Muramatsu ◽  
Marius Blajan
Keyword(s):  
Surface Treatment ◽  
Basic Study ◽  
Resin Film

Basic Study on Surface Treatment of GaN by Pulsed Atmospheric Microplasma

2012 ◽  
Vol 132 (3) ◽  
pp. 270-271
Author(s):  
Kazuo Shimizu ◽  
Yuta Noma ◽  
Marius Blajan ◽  
Shigeya Naritsuka
Keyword(s):  
Surface Treatment ◽  
Basic Study
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