IMPROVED SURFACE ENHANCED RAMAN SCATTERING FOR NANOSTRUCTURED SILVER ON POROUS SILICON FOR ULTRASENSITIVE DETERMINATION OF 2,4,6-TRINITROTOLUENE

被引：29

作者：

Lai, Yuming ^{[1
,3
]}

Wang, Jing ^{[1
]}

He, Tao ^{[1
]}

Sun, Shuqing ^{[2
]}

机构：

[1] Natl Ctr Nanosci & Technol, Lab Nanodevice, Beijing, Peoples R China

[2] Tsinghua Univ, Grad Sch Shenzhen, Shenzhen Key Lab Minimally Invas Med Technol, Lab Opt Imaging & Sensing, Shenzhen 518055, Peoples R China

[3] Chinese Acad Sci, Grad Univ, Beijing, Peoples R China

来源：

ANALYTICAL LETTERS | 2014年 / 47卷 / 05期

关键词：

Porous Si; SERS; Surface enhanced Raman scattering; TNT; METAL-DEPOSITION; SERS; TNT; NANOPARTICLES;

D O I：

10.1080/00032719.2013.850089

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Label-free and low-cost surface-enhanced Raman scattering-active substrates of silver nanostructures on porous silicon have been synthesized. The morphology and spectroscopic properties were investigated as a function of concentration and immersion time. The enhancement factor of optimized silver-porous silicon substrate was estimated to be 2.18x10(8) by the use of p-thiocresol as a Raman probe. The optimized substrate was used to determine 50pg of 2,4,6-trinitrotoluene. These results demonstrate that the prepared silver-porous silicon substrates are promising for the ultra-sensitive determination of organic molecules.

引用

页码：833 / 842

页数：10

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