Abstract
A novel approach using the self-cleaning effect of photoeatalyst TiO 2 film was proposed and studied experimentally to solve the critical contamination issues in solid immersion lens (SIL) based near-field recording (NFR). To evaluate the feasibility of the self-cleaning approach, the surface of a hemispherical (half-ball) SIL and a glass disk were coated with TiO 2 film which constituted the final layer of an antireflection (AR) coating for better optical transmittance. The hydrophilic property of the TiO2-coated SIL and disk was confirmed by the contact angle measurement with deionized water after thermal treatment to form an anatase structure and by the irradiation of UV light. To determine the effectiveness of the self-cleaning effect, a removal test was conducted with different contaminants such as a fingerprint and laser toner particles. The effects of the wavelength and intensity of UV light were tested over a range of irradiation times. The air flow during the rotation of the disk was also helpful for removing the contaminants. From the experimental results, it was confirmed that the self-cleaning effect of photoeatalyst TiO2 film is very effective for removing organic contaminants from the surfaces of an SIL and disk, which means that this approach can be applied to SIL-based NFR systems.
| Original language | English |
|---|---|
| Pages (from-to) | 5939-5943 |
| Number of pages | 5 |
| Journal | Japanese journal of applied physics |
| Volume | 47 |
| Issue number | 7 PART 2 |
| DOIs | |
| Publication status | Published - 2008 Jul 18 |
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All Science Journal Classification (ASJC) codes
- Engineering(all)
- Physics and Astronomy(all)
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Self-cleaning effect of solid immersion lens using photoeatalyst TiO 2 film for near-field recording. / Hong, Hyun Guk; Kimk, Young Joo.
In: Japanese journal of applied physics, Vol. 47, No. 7 PART 2, 18.07.2008, p. 5939-5943.Research output: Contribution to journal › Article
TY - JOUR
T1 - Self-cleaning effect of solid immersion lens using photoeatalyst TiO 2 film for near-field recording
AU - Hong, Hyun Guk
AU - Kimk, Young Joo
PY - 2008/7/18
Y1 - 2008/7/18
N2 - A novel approach using the self-cleaning effect of photoeatalyst TiO 2 film was proposed and studied experimentally to solve the critical contamination issues in solid immersion lens (SIL) based near-field recording (NFR). To evaluate the feasibility of the self-cleaning approach, the surface of a hemispherical (half-ball) SIL and a glass disk were coated with TiO 2 film which constituted the final layer of an antireflection (AR) coating for better optical transmittance. The hydrophilic property of the TiO2-coated SIL and disk was confirmed by the contact angle measurement with deionized water after thermal treatment to form an anatase structure and by the irradiation of UV light. To determine the effectiveness of the self-cleaning effect, a removal test was conducted with different contaminants such as a fingerprint and laser toner particles. The effects of the wavelength and intensity of UV light were tested over a range of irradiation times. The air flow during the rotation of the disk was also helpful for removing the contaminants. From the experimental results, it was confirmed that the self-cleaning effect of photoeatalyst TiO2 film is very effective for removing organic contaminants from the surfaces of an SIL and disk, which means that this approach can be applied to SIL-based NFR systems.
AB - A novel approach using the self-cleaning effect of photoeatalyst TiO 2 film was proposed and studied experimentally to solve the critical contamination issues in solid immersion lens (SIL) based near-field recording (NFR). To evaluate the feasibility of the self-cleaning approach, the surface of a hemispherical (half-ball) SIL and a glass disk were coated with TiO 2 film which constituted the final layer of an antireflection (AR) coating for better optical transmittance. The hydrophilic property of the TiO2-coated SIL and disk was confirmed by the contact angle measurement with deionized water after thermal treatment to form an anatase structure and by the irradiation of UV light. To determine the effectiveness of the self-cleaning effect, a removal test was conducted with different contaminants such as a fingerprint and laser toner particles. The effects of the wavelength and intensity of UV light were tested over a range of irradiation times. The air flow during the rotation of the disk was also helpful for removing the contaminants. From the experimental results, it was confirmed that the self-cleaning effect of photoeatalyst TiO2 film is very effective for removing organic contaminants from the surfaces of an SIL and disk, which means that this approach can be applied to SIL-based NFR systems.
UR - http://www.scopus.com/inward/record.url?scp=55249105463&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=55249105463&partnerID=8YFLogxK
U2 - 10.1143/JJAP.47.5939
DO - 10.1143/JJAP.47.5939
M3 - Article
AN - SCOPUS:55249105463
VL - 47
SP - 5939
EP - 5943
JO - Japanese Journal of Applied Physics
JF - Japanese Journal of Applied Physics
SN - 0021-4922
IS - 7 PART 2
ER -