期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 39, 页码 21780-21786出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b07804
关键词
embed; mycotoxins; double detection; Ag core; SERS
资金
- National Natural Science Foundation of China [21403090, 21175060]
- China Postdoctoral Science Foundation [2015M570405]
- Fundamental Research Funds for the Central Universities [JUSRP11424]
- Ministry of Education (MOE)
- State Administration of Foreign Experts Affairs (SAFEA) [B13025]
A sensitive surface-enhanced Raman scattering (SERS) signal dependent double detection of mycotoxins is achieved for the first time, without the aid of nucleic acid amplification strategies. SERS labels embedded Ag@Au core shell (CS) nanopartides (NPs) as novel SERS tags are successfully prepared through a galvanic replacement-free deposition. SERS tags produce stable and quantitative SERS signal, emerging from the plasmonic coupling at the junction of Ag core and Au shell. SERS tags engineered Raman aptasensors are developed for the double detection of ochratoxin A (OTA) and aflatoxin B1 (AFB1) in maize meal. The limits of detection (LODs) are as low as 0.006 ng/mL for OTA and 0.03 ng/mL for AFB1. The developed protocol can be extended to a large set of different SERS tags for the sensitive detection of multiple targets that possess different lengths of aptamers.
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