Multi-encoded rugate porous silicon as nerve agents sensors.

被引：32

作者：

Jang, Seunghyun

Kim, Jihoon

Koh, Youngdae

Ko, Young Chun

Woo, Hee-Gweon

Sohn, Honglae

机构：

[1] Chosun Univ, Dept Chem, Kwangju 501759, South Korea

[2] Daebul Univ, Dept Nano Chem Environm Engn, Chungnam 526702, South Korea

[3] Chonnam Natl Univ, Dept Chem, Kwangju 500757, South Korea

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2007年 / 7卷 / 11期

关键词：

multi-encoding; nanostructured rugate porous silicon; nerve agents;

D O I：

10.1166/jnn.2007.096

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The nanostructured rugate porous silicons (PSi) containing multiple photonic band gaps have been generated by an electrochemical etching through applying a composite waveform summed three computer-generated pseudo-sinusoidal current waveforms. They exhibit three sharp photonic band gaps in the optical reflectivity spectrum, corresponding to the each of the sine components varied from 0.42, 0.36, and 0.30 Hz, with a spacing of 0.06 Hz between each sine component. The sensing experiments using multi-encoded rugate PSi for the detection of nerve agents such as triethyl phosphate (TEP), diethyl chlorophosphate (DCP), dimethyl methylphosphonate (DMMP), and diethyl ethylphosphonate (DEEP) have been achieved. Capillary condensation in the pores causes the reflectivity of rugate PSi to shift to longer wavelengths due to an increase in refractive indices of the porous medium.

引用

页码：4049 / 4052

页数：4