Inactivation Effect of All-Solid-State 228 nm Far-UVC Pulsed Laser

Zhibin Zhao; Cheng Cheng; Yinghong Jin; Wenbo Zeng; Qinlong Jin; Quan Li; Jiaojiao Li; Yi Qu; Baoxue Bo

doi:10.3788/CJL202249.1515001

Chinese Journal of Lasers, Volume. 49, Issue 15, 1515001(2022)

Inactivation Effect of All-Solid-State 228 nm Far-UVC Pulsed Laser

Zhibin Zhao^1,2, Cheng Cheng², Yinghong Jin², Wenbo Zeng², Qinlong Jin², Quan Li², Jiaojiao Li², Yi Qu^2、**, and Baoxue Bo^1、*

Author Affiliations

¹State Key Laboratory of High Power Semiconductor Laser, Changchun University of Science and Technology, Changchun 130022, Jilin, China

²Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province, Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou 571158, Hainan, China

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Figures & Tables(2)

Fig. 1. 228 nm laser sterilization experiment. (a) Escherichia coli suspension in irradiation; (b) distribution of Escherichia coli under irradiation time of 0, 10, 20 s; (c) distribution of Bacillus cereus under irradiation time of 0, 30, 60 s

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Table 1. 228 nm laser inactivation effect of Escherichia coli and Bacillus cereus

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Table 1. 228 nm laser inactivation effect of Escherichia coli and Bacillus cereus

Test strains	Irradiation time /s	228 nm laser dose /(mJ·cm^－2)	Average bacteria count /(CFU·mL^－1)	Inactivated rate /%
Escherichia coli	0	0	382	－
	5	0.5	60	84.3
	10	1.0	36	90.7
	15	1.5	12	96.9
	20	2.0	0	100.0
Bacillus cereus	0	0	284	－
	15	1.5	114	50.9
	30	3.0	33	88.4
	45	4.5	4	98.6
	60	6.0	0	100.0

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Zhibin Zhao, Cheng Cheng, Yinghong Jin, Wenbo Zeng, Qinlong Jin, Quan Li, Jiaojiao Li, Yi Qu, Baoxue Bo. Inactivation Effect of All-Solid-State 228 nm Far-UVC Pulsed Laser[J]. Chinese Journal of Lasers, 2022, 49(15): 1515001

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Paper Information

Category: Letters

Received: Apr. 11, 2022

Accepted: Jun. 10, 2022

Published Online: Jul. 29, 2022

The Author Email: Qu Yi (quyihainan@126.com), Bo Baoxue (bbx@cust.edu.cn)

DOI:10.3788/CJL202249.1515001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology