دورية أكاديمية
Highly Sensitive Magnetic-SERS Dual-Function Silica Nanoprobes for Effective On-Site Organic Chemical Detection
العنوان: | Highly Sensitive Magnetic-SERS Dual-Function Silica Nanoprobes for Effective On-Site Organic Chemical Detection |
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المؤلفون: | Cheolhwan Jeong, Hyung-Mo Kim, So Yeon Park, Myeong Geun Cha, Sung-Jun Park, San Kyeong, Xuan-Hung Pham, Eunil Hahm, Yuna Ha, Dae Hong Jeong, Bong-Hyun Jun, Yoon-Sik Lee |
المصدر: | Nanomaterials, Vol 7, Iss 6, p 146 (2017) |
بيانات النشر: | MDPI AG, 2017. |
سنة النشر: | 2017 |
المجموعة: | LCC:Chemistry |
مصطلحات موضوعية: | surface-enhanced Raman scattering, magnetic aggregation, on-site detection, Chemistry, QD1-999 |
الوصف: | We report magnetic silver nanoshells (M-AgNSs) that have both magnetic and SERS properties for SERS-based detection. The M-AgNSs are composed of hundreds of Fe3O4 nanoparticles for rapid accumulation and bumpy silver shell for sensitive SERS detection by near-infrared laser excitation. The intensity of the SERS signal from the M-AgNSs was strong enough to provide single particle-level detection. We obtained much stronger SERS signal intensity from the aggregated M-AgNSs than from the non-aggregated AgNSs. 4-Fluorothiophenol was detected at concentrations as low as 1 nM, which corresponds to 0.16 ppb. The limit of detection for tetramethylthiuram disulfide was 10 μM, which corresponds to 3 ppm. The M-AgNSs can be used to detect trace amounts of organic molecules using a portable Raman system. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 2079-4991 |
Relation: | http://www.mdpi.com/2079-4991/7/6/146; https://doaj.org/toc/2079-4991 |
DOI: | 10.3390/nano7060146 |
URL الوصول: | https://doaj.org/article/ab8715f7aca0456b8fb043f8f1fa6ba9 |
رقم الأكسشن: | edsdoj.b8715f7aca0456b8fb043f8f1fa6ba9 |
قاعدة البيانات: | Directory of Open Access Journals |
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