Rational design of a chalcogenopyrylium-based surface-enhanced resonance Raman scattering nanoprobe with attomolar sensitivity.

Rational design of a chalcogenopyrylium-based surface-enhanced resonance Raman scattering nanoprobe with attomolar sensitivity.
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DOI:
10.1038/ncomms7570
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发表时间:
2015-03-24
影响因子:
16.6
通讯作者:
Kircher, Moritz F.
Kircher, Moritz F.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Harmsen, Stefan;Bedics, Matthew A.;Wall, Matthew A.;Huang, Ruimin;Detty, Michael R.;Kircher, Moritz F.

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高灵敏度和特异性是生物医学成像的两个理想特征。拉曼成像作为一种有前景的光学模式而出现,它同时具备这两种功能。在这里,我们报告了一组近红外吸收的 2-噻吩基取代的硫属吡喃鎓染料的设计和合成,这些染料对金具有高亲和力。当吸附到金纳米粒子上时,这些染料产生生物相容性 SERRS 纳米探针,其检测限为阿托摩尔,适合超灵敏的体内多重肿瘤和疾病标志物检测。
High sensitivity and specificity are two desirable features in biomedical imaging. Raman imaging has surfaced as a promising optical modality that offers both. Here, we report the design and synthesis of a group of near infrared absorbing 2-thienyl-substituted chalcogenopyrylium dyes tailored to have high affinity for gold. When adsorbed onto gold nanoparticles, these dyes produce biocompatible SERRS-nanoprobes with attomolar limits of detection amenable to ultrasensitive in vivo multiplexed tumor and disease marker detection.
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