scholarly journals LED ULTRAVIOLET EXPOSURE UNIT WITH ADJUSTABLE EXPOSURE TIME

Doklady BGUIR ◽  
2019 ◽  
pp. 46-50
Author(s):  
A. E. Cheliapin ◽  
P. S. Begunov ◽  
Y. V. Trofimov ◽  
G. K. Zhavnerko
Keyword(s):  
Experimental Study ◽  
Thick Film ◽  
Ultraviolet Light ◽  
Exposure Time ◽  
Light Emitting ◽  
Ultraviolet Exposure ◽  
Topological Pattern ◽  
Controlled Exposure ◽  
Ultraviolet Light Emitting Diodes

The possibilities of improving the quality of the topological pattern in the exposure of thick-film photoresists due to uniform irradiation with ultraviolet light-emitting diodes are investigated. The results of an experimental study of the developed LED ultraviolet photolithographic irradiator with a controlled exposure time are presented.

scholarly journals Effectiveness of visible and ultraviolet light emitting diodes for inactivation of Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli: A comparative study

2019 ◽  
Vol 15 (4) ◽  
pp. 572-576 ◽  
Author(s):  
Sameen Ahmed Malik ◽  
Tan Tian Swee ◽  
Nik Ahmad Nizam Nik Malek ◽  
Azli Yahya ◽  
Takahiro Emoto ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Ultraviolet Light ◽  
Exposure Time ◽  
Light Emitting Diodes ◽  
Inhibition Zone ◽  
Light Emitting ◽  
Log Reduction ◽  
Ultraviolet Light Emitting Diodes

The rapid use of ultraviolet light emitting diodes (UV-LEDs) in various disinfection applications is growing tremendously due to their advantages unachievable using UV lamps. In this study, a comparison of standard LED at 460 nm wavelength and UVA LED at 385 nm was conducted to determine their effectiveness in disinfection of frequently isolated pathogens in hospitals (Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli). Determination of disinfection efficiency was carried out by measuring inhibition zone. Effects of varied exposure time on the inactivation of pathogenic microorganisms was studied. The results demonstrated that LED does not have germicidal activities. The highest inactivation for UVA LED was achieved for Pseudomonas aeruginosa. Linear relationship was found between exposure time and log reduction. This study showed that UVA LEDs can effectively inactivate significantly higher number of microorganisms hence can be used in disinfection of various applications.

The sapphire substrate pretreatment effects on high-temperature annealed AlN templates in deep ultraviolet light emitting diodes

CrystEngComm ◽  
2019 ◽  
Vol 21 (31) ◽  
pp. 4632-4636 ◽  
Author(s):  
M. X. Wang ◽  
F. J. Xu ◽  
J. M. Wang ◽  
N. Xie ◽  
Y. H. Sun ◽  
...  
Keyword(s):  
High Temperature ◽  
Ultraviolet Light ◽  
Sapphire Substrate ◽  
Light Emitting Diodes ◽  
Crystalline Quality ◽  
Light Emitting ◽  
Pretreatment Effects ◽  
Deep Ultraviolet ◽  
Ultraviolet Light Emitting Diodes

Evolution of crystalline quality of AlN via high-temperature (HT) annealing induced by different sapphire pretreatments is investigated.

Visible Luminescence of the InGaN/GaN Ultraviolet Light-emitting Diodes 365 nm

2017 ◽  
Vol 9 (5) ◽  
pp. 05031-1-05031-5 ◽  
Author(s):  
V. P. Veleschuk ◽  
◽  
A. I. Vlasenko ◽  
Z. K. Vlasenko ◽  
D. N. Khmil ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Visible Luminescence ◽  
Ultraviolet Light Emitting Diodes

scholarly journals Graphene-Based Transparent Conducting Substrates for GaN/AlGaN Nanocolumn Flip-Chip Ultraviolet Light-Emitting Diodes

2021 ◽  
Author(s):  
Andreas Liudi Mulyo ◽  
Anjan Mukherjee ◽  
Ida Marie Høiaas ◽  
Lyubomir Ahtapodov ◽  
Tron Arne Nilsen ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Flip Chip ◽  
Light Emitting Diodes ◽  
Light Emitting ◽  
Transparent Conducting ◽  
Ultraviolet Light Emitting Diodes
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