Effects of Acid Treatment and Cathode Reduction on The Luminescence and Stability of Porous Silicon

Porous silicon (PSi) was fabricated by using electrochemical anodic etching method. Then acid treatment and cathode reduction treatment were employed to improve the luminescence properties and stability of PSi material. Photoluminescence (PL) measurements and scanning electron microscope (SEM) were used to observe the luminescence properties and microstructure of samples, respectively. The results of PL measurements showed that the PL intensity and the stability of luminescence of samples after cathodic reduction and acid treatment were significantly improved. The SEM images showed that the porosity of PSi may be increased through the cathodic reduction treated.

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Improvement of the voltage-controlled negative resistance of a porous silicon emitter using cathode reduction and electro-pretreatment

Journal of Physics D Applied Physics ◽

10.1088/0022-3727/49/34/345101 ◽

2016 ◽

Vol 49 (34) ◽

pp. 345101 ◽

Cited By ~ 2

Author(s):

Li He ◽

Xiaoning Zhang ◽

Wenjiang Wang ◽

Xiaoning Zhao

Keyword(s):

Porous Silicon ◽

Negative Resistance ◽

Cathode Reduction

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Re‐establishment of photoluminescence in Cu quenched porous silicon by acid treatment

Journal of Applied Physics ◽

10.1063/1.359559 ◽

1995 ◽

Vol 77 (8) ◽

pp. 4130-4132 ◽

Cited By ~ 21

Author(s):

Joseph E. Hilliard ◽

Hasan M. Nayfeh ◽

Munir H. Nayfeh

Keyword(s):

Porous Silicon ◽

Acid Treatment

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Improvement of electron emission characteristics of porous silicon emitter by using cathode reduction and electrochemical oxidation

Applied Surface Science ◽

10.1016/j.apsusc.2016.12.134 ◽

2017 ◽

Vol 399 ◽

pp. 592-598 ◽

Cited By ~ 2

Author(s):

He Li ◽

Wang Wenjiang ◽

Zhang Xiaoning

Keyword(s):

Porous Silicon ◽

Electrochemical Oxidation ◽

Electron Emission ◽

Emission Characteristics ◽

Cathode Reduction

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Fasciaton of Pectate Elementary Fibrils

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100070746 ◽

1973 ◽

Vol 31 ◽

pp. 60-61

Author(s):

George F. Leeper

Keyword(s):

Acid Treatment ◽

Carbon Film ◽

Final Concentration ◽

Cellulose Microfibrils ◽

Pectic Acid ◽

Elementary Fibrils

Polysaccharide elementary fibrils are usually fasciated into microfibrils of from one hundred to a few hundred Angstroms wide. Cellulose microfibrils when subjected to acid treatment dissociate into component elementary fibrils. For pectic acid it was observed that variations in pH could cause a change in the fasciation of the elementary fibrils.Solutions of purified pectic acid and sodium phosphotungtate were adjusted to various pH levels with NaOH or HCl and diluted to give a final concentration of 0.5 and 1% for the polysaccharide and negative stains respectively. Micrographs were made of the samples after drying on a carbon film covered grid. The average number of elementary fibrils was determined by counting the number of elementary fibrils in each fascicle intersected by lines drawn across the micrograph.

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