[논문]Combination of Light Emitting Diode at 375 nm and Photo-reactive TiO2 Layer Prepared by Electrostatic Spraying for Sterilization

Hwang, Kyu-Seog; Jeon, Young-Sun; Choi, Tae-Il; Hwangbo, Seung

doi:10.5370/jeet.2013.8.5.1169

[국내논문] Combination of Light Emitting Diode at 375 nm and Photo-reactive TiO2 Layer Prepared by Electrostatic Spraying for Sterilization 원문보기

Journal of electrical engineering & technology, v.8 no.5, 2013년, pp.1169 - 1174

Hwang, Kyu-Seog (Dept. of Biomed. Eng. & Graduate School of Mechanical Eng., Nambu Univ.) , Jeon, Young-Sun (Dept. of Biomed. Eng. & Graduate School of Mechanical Eng., Nambu Univ.) , Choi, Tae-Il (Dept. of Health Admin., Kwangju Women's Univ.) , Hwangbo, Seung (Dept. of Electronic & Photonic Eng., Honam Univ.)

Abstract ▼ AI-Helper

The objective of this work was to increase the efficiency of ultraviolet-light emitting diodes at 375 nm for sterilization. Since $TiO_2$ had antibacterial properties, which were attributed to the appearance of hydroxyl radicals and superoxide radical anions on the surface species under ultra violet radiation at about 387 nm, photo-reactive layers such as Ag-doped $TiO_2$ were coated on aluminum substrates by electrostatic spraying. Crystallinity and surface morphology of the coating layer were examined by X-ray diffraction ${\theta}-2{\theta}$ scan and field emission-scanning electron microscope, respectively. In an antibacterial test, we observed above 99% reduction of Escherichia coli populations on 3 or 5 mol% Ag-doped $TiO_2$ layers after irradiation for 2 hrs at 375 nm, while very low inactivation on bare aluminum substrates occurred after irradiation as the same condition.

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The objective of this work was to evaluate the efficiency of UVA-LEDs for sterilization. Specifically, this work evaluated the use of UV-LEDs at 375 nm, for inactivation of Escherichia coli (E.
This work suggests that the Ag-doped TiO₂ films on Al substrates for an automobile evaporator can successfully evaluate the antimicrobial activity of UVA-LEDs at 375 nm. Well-grown nano-sized crystallites and homogeneous surface were confirmed by FE-SEM.

제안 방법

To evaluate crystallinity of the 3 mol% Ag-doped TiO₂ films coated on Al substrates, X-ray diffraction (XRD) was performed. Fig.

대상 데이터

A UV light source panel was designed with an aluminum base copper clad laminate because of its excellent dissipation, electromagnetic shielding characteristics, dielectric properties and mechanical working properties. Module was designed with an array of four LEDs using a circuit wire-wrapped. 3.
The ESD set-up consists of three parts; an electrostatic spray unit, a liquidprecursor feed unit, and a temperature control unit. The electrostatic spray unit comprises a high DC voltage power supply (SHV120-30K-RD, Convertech Co., Ltd., Korea), a stainless steel needle (0.1 mm inner diameter), and a grounded and a heated substrate holder. The liquid precursor feed unit consists of a flexible silicon tube and a syringe pump (KD 200, KD Scientific Inc.

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원문보기 상세보기
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[국내논문] Combination of Light Emitting Diode at 375 nm and Photo-reactive TiO2 Layer Prepared by Electrostatic Spraying for Sterilization 원문보기

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[국내논문] Combination of Light Emitting Diode at 375 nm and Photo-reactive TiO2 Layer Prepared by Electrostatic Spraying for Sterilization 원문보기

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