Sterically Stabilized,Surface-Enhanced Raman Scattering-Tagged Gold Nanorod Probes for Immunoassay

doi:10.6023/A1105311

Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (01): 65-70.DOI: 10.6023/A1105311 Previous Articles Next Articles

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空间稳定的SERS标记金纳米棒探针用于免疫检测

卢军军^a, 郭红燕^b, 王维钰^a, 潘建高^a, 胡家文^a

a. 湖南大学化学生物传感与计量学国家重点实验室和化学化工学院, 长沙 410082;
b. 中国科学院合肥智能机械研究所, 合肥 230031

投稿日期:2011-05-31 修回日期:2011-08-16 发布日期:2012-02-25
通讯作者: 胡家文 E-mail:jwhu@hnu.edu.cn
基金资助:
国家自然科学基金(Nos.20603008,20873037和J0830415)和吉林大学超分子结构与材料国家重点实验室开放课题(No.SKLSSM200902)资助项目.

Sterically Stabilized,Surface-Enhanced Raman Scattering-Tagged Gold Nanorod Probes for Immunoassay

Lu Junjun^a, Guo Hongyan^b, Wang Weiyu^a, Pan Jiangao^a, Hu Jiawen^a

a. State Key Laboratory for Chemo/Biosensing and Chemometrics and College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082;
b. Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031

Received:2011-05-31 Revised:2011-08-16 Published:2012-02-25
Supported by:
Project supported by the National Natural Science Foundation of China(Nos.20603008,20873037,and J0830415)and Open Project of State Key Laboratory of Supramolecular Structure and Materials(Jilin University)(No.SKLSSM200902).

The immunoassay application of sterically stabilized,surface-enhanced Raman scattering (SERS)-tagged Au nanorod(NR)probes was reported.The probes were prepared by coadsorbing Raman-active molecule 4-mercaptobenzoic acid and biocompatible α-mercapto-ω-carboxyl polyethylene glycol onto the surfaces of Au NRs.The long PEG chain provides both protection and steric stabilization to the probes so that they are able to survive in adverse condition;meanwhile,its terminal carboxyl group binds target entity such as antibody,which imparts detection/recognition functionality to the probes.When the probe recognizes antigen(through the classical"sandwich"structure that was formed due to the highly binding specificity among capture antibody on a solid substrate,detected antigen,and antibody on the probe),the recognition is signaled by the SERS signals of the 4-mercaptobenzoic acid.The detection limit of the Au NR probes,for a single component antigen,was as low as 1×10^-9mg·mL^-1.

Key words: 4-mercaptobenzoic acid, gold nanorod, α-mercapto-ω-carboxyl polyethylene glycol, immunoassay, surface-enhanced Raman scattering

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Lu Junjun, Guo Hongyan, Wang Weiyu, Pan Jiangao, Hu Jiawen. Sterically Stabilized,Surface-Enhanced Raman Scattering-Tagged Gold Nanorod Probes for Immunoassay[J]. Acta Chimica Sinica, 2012, 70(01): 65-70.

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空间稳定的SERS标记金纳米棒探针用于免疫检测

Sterically Stabilized,Surface-Enhanced Raman Scattering-Tagged Gold Nanorod Probes for Immunoassay

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