Fluorescence Resonant Energy Transfer Biosensor Based on Upconversion‐Luminescent Nanoparticles

Abstract

A pair to fret about: Biotinylated phosphor nanoparticles that emit upconversion luminescence have been taken with biotinylated Au nanoparticles, which act as energy acceptors, and the pair has been applied to the determination of trace amounts of avidin based on fluorescence resonant energy transfer (FRET; see picture).

White-light upconversion emission of lanthanide double-doped oxide nanoparticles via defect state luminescence of ZnO

“…These results demonstrate that the size and oriented growth of ZnO:Yb/Tm UCNPs can be controlled by the doped OH contents. The growth process of ZnO:Yb/Tm includes the formation of Zn(OH) 4 2 , the dehydration of Zn(OH) 4 2 at the crystal interface, and the substitution of lanthanide ions (Yb 3+ /Tm 3+ ). The sample growth rate is related to the number of OH at the interface of ZnO 4 6 .…”

“…The growth process of ZnO:Yb/Tm includes the formation of Zn(OH) 4 2 , the dehydration of Zn(OH) 4 2 at the crystal interface, and the substitution of lanthanide ions (Yb 3+ /Tm 3+ ). The sample growth rate is related to the number of OH at the interface of ZnO 4 6 . The hydroxyl ion tends to stabilize the zinc ion and affects the direction …”

“…The doping of Ln 3+ ions can convert the near-infrared (NIR) into visible light. The NIR excitation can penetrate the skin, which has potential biological applications, such as bioimaging and multifunctional biological probes [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The white UCL has a broad range of emission wavelengths, including blue, green, and red emissions, generating a large library of spectral region that can be used for multiplexed biological labeling and encoding [16,17].…”

Luminescent and hydrophilic LaF3–polymer nanocomposite for DNA detection

“…Therefore, it is still challenging chemists to find more efficient probes. Among these luminescent biomaterials, luminescent lanthanide ion-doped nanocrystals have become attractive due to their unique luminescence properties, such as high quantum yields, low photobleaching, narrow emission bands and especially longer luminiscent lifetimes (μs-ms range), allowing for gated time-resolved fluorescence (15)(16)(17)(18)(19)(20)(21)(22)(23). Hence, lanthanide ion-doped nanocrystals are promising as alternative materials for biolabels.…”

Upconversion 32Nb2O5–10La2O3–16ZrO2 glass activated with Er3+/Yb3+ and dye sensitized solar cell application

“…[1][2][3][4][5][6][7][8][9][10][11][12][13]. Due to their special anti-Stokes process which converts the low-energy photon into high-energy photon, the upconversion luminescence has attracted great attention of scientists.…”