Photothermal detection of a single gold nanoparticle in water suspension
Photothermal detection of a single gold nanoparticle in water suspension
复制标题
水悬浮液中单个金纳米颗粒的光热检测
DOI:
10.1007/s11051-019-4566-6
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发表时间:
2019
影响因子:
2.5
通讯作者:
Sthel, Marcelo Silva
中科院分区:
文献类型:
--
作者:
Lima, Marcenilda Amorim;Olaizola, Aristides Marcano;Gamboa, Genaro López;de Castro, Maria Priscila;Sthel, Marcelo Silva
We study the photothermal response of water solution of 10-, 50-, and 100-nm gold nanoparticles as a function of concentration under irradiation of a continuous wave 6-W 445-nm diode laser. The method allows determining concentrations as low 8 × 10−7mg/ml, which corresponds to the detection of a single nanoparticle of 100- and 50-nm diameter or about 1000 nanoparticles of 10-nm diameter. The results demonstrate the application for the study of the optical response of a single nanoparticle in water suspension. We discuss the potential applications of the finding for detection of low concentration of biomolecules using a single nanoparticle.
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