Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces
Ultraviolet (UV) light-emitting diodes (LED) have gained attention for substituting conventional disinfection methods due to efficiency, environmental benefits, and safety since the early 2000s. Earlier research has investigated high-power UV-disinfection systems employing UV tubes for effectively d...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2024
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| Online Access: | http://journalarticle.ukm.my/25753/ http://journalarticle.ukm.my/25753/1/30.pdf |
| _version_ | 1848816440410374144 |
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| author | Jahanzeb Sheikh, Tan, Tian Swee Syafiqah Saidin, Azli Yahya, Sameen Ahmed Malik, Chua, Lee Suan Serrano, Jose Javier Tiong, Matthias Foh Thye Leong, Kah Meng Jawad Shafique, |
| author_facet | Jahanzeb Sheikh, Tan, Tian Swee Syafiqah Saidin, Azli Yahya, Sameen Ahmed Malik, Chua, Lee Suan Serrano, Jose Javier Tiong, Matthias Foh Thye Leong, Kah Meng Jawad Shafique, |
| author_sort | Jahanzeb Sheikh, |
| building | UKM Institutional Repository |
| collection | Online Access |
| description | Ultraviolet (UV) light-emitting diodes (LED) have gained attention for substituting conventional disinfection methods due to efficiency, environmental benefits, and safety since the early 2000s. Earlier research has investigated high-power UV-disinfection systems employing UV tubes for effectively disinfecting surfaces. However, such systems come with several limitations, including the delicacy of UV tubes, the mercury component, and the larger size of the equipment, requiring trained professionals for handling. Additionally, owing to their larger size, these systems are unable to adequately treat shaded spaces, resulting in insufficient disinfection. Therefore, this study aimed to investigate and compare the efficacy of surface mount device (SMD)-beaded UV-C LEDs against Staphylococcus aureus (S. aureus) bacterium to elucidate the self-reliant disinfection capacity, focusing on achieving peak disinfection efficiency up to 15 cm for treating high-touch regions. Under maximum exposure settings (15 cm, 60 s), a considerable reduction of 1.7-log10 inactivation was achieved with KW6565 upon exposure to 0.054 mJ-cm-², corresponding to an efficiency of 98%. This swift decline led to a reduction in bacterial concentration from the initial level to 1.00x108 CFU/mL. However, the RZX variant necessitated the dose of 0.018 mJ-cm-² to achieve a 1.6-log10 inactivation or 97.6% percent reduction under similar exposure settings. The efficacy of both the 4W variants were notably impacted by the UV dose (p<0.05) at different distances, compared to the control group, revealing a positive correlation with the bactericidal rate. To conclude, this research substantiated the potential of a 4W UV-LED to establish an enhanced disinfection strategy, particularly for treating shady spaces. |
| first_indexed | 2025-11-15T01:05:54Z |
| format | Article |
| id | oai:generic.eprints.org:25753 |
| institution | Universiti Kebangasaan Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T01:05:54Z |
| publishDate | 2024 |
| publisher | Penerbit Universiti Kebangsaan Malaysia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | oai:generic.eprints.org:257532025-08-12T07:42:00Z http://journalarticle.ukm.my/25753/ Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces Jahanzeb Sheikh, Tan, Tian Swee Syafiqah Saidin, Azli Yahya, Sameen Ahmed Malik, Chua, Lee Suan Serrano, Jose Javier Tiong, Matthias Foh Thye Leong, Kah Meng Jawad Shafique, Ultraviolet (UV) light-emitting diodes (LED) have gained attention for substituting conventional disinfection methods due to efficiency, environmental benefits, and safety since the early 2000s. Earlier research has investigated high-power UV-disinfection systems employing UV tubes for effectively disinfecting surfaces. However, such systems come with several limitations, including the delicacy of UV tubes, the mercury component, and the larger size of the equipment, requiring trained professionals for handling. Additionally, owing to their larger size, these systems are unable to adequately treat shaded spaces, resulting in insufficient disinfection. Therefore, this study aimed to investigate and compare the efficacy of surface mount device (SMD)-beaded UV-C LEDs against Staphylococcus aureus (S. aureus) bacterium to elucidate the self-reliant disinfection capacity, focusing on achieving peak disinfection efficiency up to 15 cm for treating high-touch regions. Under maximum exposure settings (15 cm, 60 s), a considerable reduction of 1.7-log10 inactivation was achieved with KW6565 upon exposure to 0.054 mJ-cm-², corresponding to an efficiency of 98%. This swift decline led to a reduction in bacterial concentration from the initial level to 1.00x108 CFU/mL. However, the RZX variant necessitated the dose of 0.018 mJ-cm-² to achieve a 1.6-log10 inactivation or 97.6% percent reduction under similar exposure settings. The efficacy of both the 4W variants were notably impacted by the UV dose (p<0.05) at different distances, compared to the control group, revealing a positive correlation with the bactericidal rate. To conclude, this research substantiated the potential of a 4W UV-LED to establish an enhanced disinfection strategy, particularly for treating shady spaces. Penerbit Universiti Kebangsaan Malaysia 2024-09 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/25753/1/30.pdf Jahanzeb Sheikh, and Tan, Tian Swee and Syafiqah Saidin, and Azli Yahya, and Sameen Ahmed Malik, and Chua, Lee Suan and Serrano, Jose Javier and Tiong, Matthias Foh Thye and Leong, Kah Meng and Jawad Shafique, (2024) Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces. Jurnal Kejuruteraan, 36 (5). pp. 1329-1336. ISSN 0128-0198 https://www.ukm.my/jkukm/volume-3605-2024/ |
| spellingShingle | Jahanzeb Sheikh, Tan, Tian Swee Syafiqah Saidin, Azli Yahya, Sameen Ahmed Malik, Chua, Lee Suan Serrano, Jose Javier Tiong, Matthias Foh Thye Leong, Kah Meng Jawad Shafique, Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces |
| title | Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces |
| title_full | Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces |
| title_fullStr | Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces |
| title_full_unstemmed | Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces |
| title_short | Comparative efficacy assessment of solitary SMD beaded ultraviolet-C light emitting diodes for enhanced disinfection of high-touch surfaces |
| title_sort | comparative efficacy assessment of solitary smd beaded ultraviolet-c light emitting diodes for enhanced disinfection of high-touch surfaces |
| url | http://journalarticle.ukm.my/25753/ http://journalarticle.ukm.my/25753/ http://journalarticle.ukm.my/25753/1/30.pdf |