Upconverted excitation energy lock-in for deep-ultraviolet enhancement

Abstract

Photon upconversion of near-infrared (NIR) irradiation into deep-ultraviolet (UV) emission offers many exciting opportunities for drug release in deep tissues, photodynamic therapy, solid-state lasing, energy storage, and photocatalysis. However, NIR-to-deep-UV upconversion remains a daunting challenge due to low quantum efficiency. Here, we report an unusual six-photon upconversion process in Gd3+/Tm3+-codoped nanoparticles comprising a heterogeneous, core-multishell nanostructure. This multishell design efficiently suppresses energy consumption induced by interior energy traps, maximizes cascade sensitizations of the NIR excitation, and promotes upconverted deep-UV emission from high-lying excited states. We released the intense six-photon-upconverted UV emissions at 253 nm under 808-nm excitation. This work provides new insight into mechanistic understanding of the upconversion process within the heterogeneous architecture, while offering exciting opportunities for developing nanoscale deep-UV emitters that can be remotely controlled in deep tissues upon NIR illumination.

The functions and applications of GDSL esterase/lipase proteins in agriculture: A review

“…29 Transgenic A. thaliana plants which overproduce Glycine max GELP28 (GmGELP28) exhibited increased tolerance to drought and NaCl stress. 29 Soybean plants with hairy roots transformed by Agrobacterium rhizogenes containing the GmGELP28 coding region were also more resilient against drought stress. 29 Soybean also continues to be the subject of genetic modification.…”

“…29 Soybean plants with hairy roots transformed by Agrobacterium rhizogenes containing the GmGELP28 coding region were also more resilient against drought stress. 29 Soybean also continues to be the subject of genetic modification.…”