کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5359408 | 1503677 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
In situ and room-temperature synthesis of ultra-long Ag nanoparticles-decorated Ag molybdate nanowires as high-sensitivity SERS substrates
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: In situ and room-temperature synthesis of ultra-long Ag nanoparticles-decorated Ag molybdate nanowires as high-sensitivity SERS substrates In situ and room-temperature synthesis of ultra-long Ag nanoparticles-decorated Ag molybdate nanowires as high-sensitivity SERS substrates](/preview/png/5359408.png)
چکیده انگلیسی
We report on room-temperature synthesis of Ag nanoparticles (NPs) decorated silver molybdate nanowires (SMNs) using a solution-based chemical reaction method. We show that AgxMoyOz (Ag2Mo2O7, Ag2MoO4 and Ag6Mo10O33) nanomaterials can be selectively synthesized by altering the pH value of the reaction media in the presence of silicotungstic acid at room temperature. This reaction process uses isopropyl alcohol as a free radical scavenger and occurs over a short reaction time compared to the traditional hydrothermal method. Moreover, we demonstrate that under UV-light illumination of different periods, Ag NPs of controllable distribution densities are formed in situ on the surface of SMNs in tungstosilicate acid environment. We show that the SERS sensitivity of such Ag NP-SMN complex depends on the distribution density of Ag NPs, with the best structure capable of detecting the p-aminothiophenol at a concentration as low as 1.0Â ÃÂ 10â11Â M. The same substrate is further used to enhance the Raman signal from 2-mercaptopyridine from which a quantitative relationship between the analyte concentration and its corresponding Raman intensity can be established.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 287, 15 December 2013, Pages 404-410
Journal: Applied Surface Science - Volume 287, 15 December 2013, Pages 404-410
نویسندگان
Zhi Yong Bao, Dang Yuan Lei, Jiyan Dai, Yucheng Wu,