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|
| Type |
Poster Presentation |
| Area |
Material Chemistry |
| Room No. |
Exhibition Hall 2+3 |
| Time |
10월 19일 (목요일) 11:00~12:30 |
| Code |
MAT.P-395 |
| Subject |
Ultra-Sensitive Bragg-Reflective Photoluminescent Porous Silicon for Explosive Vapors
|
| Authors |
YoungIn Noh, Honglae Sohn1,*
Chemistry, Chosun University, Korea
1Department of Chemistry, Chosun University, Korea
|
| Abstract |
Novel photoluminescent Bragg-reflective porous silicon (PBR PS) exhibiting dual optical properties, both optical reflectivity and photoluminescence, were developed and used as explosive sensor. PBR PS samples were prepared by an electrochemical etch of n-type silicon under the illumination with a 300 W tungsten filament bulb for the duration of etch. The etching solution consisted of a 1:1 volume mixture of aqueous 48% hydrofluoric acid and absolute ethanol. Typical etch parameters for the generation of PBR PS involved using a periodic sine wave current with 10 repeats. PBR PS exhibits strong red color reflection at 650 nm and strong red photoluminescence at 650 nm. The optical properties of free-standing PBR PS were investigated. The front side surface of PBR PS shows both reflectivity and photoluminescence, however the back side surface of free-standing PBR PS shows only reflectivity without PL. Surface and cross-sectional morphology and optical characteristic were determined by using scanning electron microscopy and optical. |
| E-mail |
youngin311@naver.com |
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120th General Meeting of the KCS