光子上转换
材料科学
自体荧光
荧光
激发
对比度(视觉)
纳米颗粒
激光器
发光
高对比度
光电子学
光学
纳米技术
物理
电气工程
工程类
作者
Masfer Alkahtani,Fahad Alghannam,Carlos J. Sánchez,Carmen Gomes,Hong Liang,Philip Hemmer
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2016-11-07
卷期号:27 (48): 485501-485501
被引量:32
标识
DOI:10.1088/0957-4484/27/48/485501
摘要
Upconversion nanoparticles (UCNPs) are of interest because they allow suppression of tissue autofluorescence and are therefore visible deep inside biological tissue. Compared to upconversion dyes, UCNPs have a lower pump intensity threshold, better photostability, and less toxicity. Recently, YVO4: Er+3, Yb+3 nanoparticles were shown to exhibit strong up-conversion luminescence with a relatively low 10 kW cm−2 excitation intensity even in water, which makes them excellent bio-imaging candidates. Herein, we investigate their use as internal probes in insects by injecting YVO4 : Er+3, Yb+3 nanoparticles into fire ants as a biological model, and obtain 2D optical images with 980 nm illumination. High-contrast images with high signal-to-noise ratio are observed by detecting the up-conversion fluorescence as the excitation laser is scanned.
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