Polymer Dots with Enhanced Photostability, Quantum Yield, and Two-Photon Cross-Section using Structurally Constrained Deep-Blue Fluorophores

2021 ◽  
Author(s):  
Don M. Mayder ◽  
Christopher M. Tonge ◽  
Giang D. Nguyen ◽  
Michael V. Tran ◽  
Gary Tom ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Cross Section ◽  
Two Photon ◽  
Deep Blue ◽  
Polymer Dots ◽  
Enhanced Photostability ◽  
Photon Cross Section

Absolute two-photon cross section of Rb measured by differential absorption

1993 ◽  
Vol 18 (20) ◽  
pp. 1754 ◽  
Author(s):  
C. L. A. Collins ◽  
K. D. Bonin ◽  
M. A. Kadar-Kallen
Keyword(s):  
Cross Section ◽  
Differential Absorption ◽  
Two Photon ◽  
Photon Cross Section

Designing two-photon fluorescent probes based on the target-induced enhancement of the absorption cross-section

2014 ◽  
Vol 50 (76) ◽  
pp. 11139-11142 ◽  
Author(s):  
Lingyu Zeng ◽  
Shiyu Chen ◽  
Tian Xia ◽  
Cheng Zhong ◽  
Zhihong Liu
Keyword(s):  
Quantum Yield ◽  
Cross Section ◽  
Fluorescent Probes ◽  
Absorption Cross Section ◽  
Photon Absorption ◽  
Probe Design ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
New Strategy

We have reported a new strategy for two-photon probe design for the simultaneous target-induced enhancement of the two-photon absorption cross-section and quantum yield.

Large-Scale High-Yield Synthesis of PdCu@Au Tripods and the Quantification of their Luminescence Properties for Cancer Cell Imaging

2017 ◽  
Vol 49 ◽  
pp. 85-97
Author(s):  
Bo Pang ◽  
Xiang Xi Meng ◽  
Yang Long Hou ◽  
Hong Fang Sun ◽  
Qiu Shi Ren
Keyword(s):  
Quantum Yield ◽  
Cross Section ◽  
Large Scale ◽  
Biomedical Application ◽  
Au Nanoparticle ◽  
Luminescence Properties ◽  
Localized Surface Plasmon ◽  
High Yield ◽  
Two Photon

The synthesis of anisotropic branched gold nanoparticles remines to be challenging as their arm number and arm length could hardly be controlled, greatly limited their biomedical application. We report the large-scale high-yield synthesis of PdCu@Au tripods, and, for the first time, their two-photon luminescence properties with quantitative characterization of the two-photon action cross section as well as quantum yield. By introducing nitrogen protection to the synthesis of the PdCu bimetallic cores, this approach eliminates the oxidative etching caused by oxygen in the air, providing a 2.5 times higher synthetic yield of 70.4 %, which enables the large-scale preparation of PdCu@Au at ca. 380 mg per batch. By the conformal coating of PdCu bimetallic cores, the PdCu@Au tripods are prepared with a purity of >90 % with average arm length 45.3 ± 5.6 nm that is ideal for biomedical applications. The PdCu@Au tripods demonstrate a much brighter two-photon luminescence than that from Au nanorods, with a 3.6 ± 0.9 times larger two-photon action cross section and comparable quantum yield. Our result also shows the two-photon luminescence property of PdCu@Au tripods could be tuned by their distinct localized surface plasmon resonance property and, in turn, the different amount of Au coating. This tunability could be explained by the recently-proposed two-step excitation mechanism of two-photon luminescence in Au nanoparticle. The folate-targeted in vitro two-photon luminescence imaging of MDA-MB-435 breast cancer cells were also demonstrated to show the great potential using PdCu@Au tripods as novel multi-functional platforms for cancer theranostics.

Lysosome-targetable polythiophene nanoparticles for two-photon excitation photodynamic therapy and deep tissue imaging

2017 ◽  
Vol 5 (20) ◽  
pp. 3651-3657 ◽  
Author(s):  
Shaojing Zhao ◽  
Guangle Niu ◽  
Feng Wu ◽  
Li Yan ◽  
Hongyan Zhang ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Quantum Yield ◽  
Fluorescence Imaging ◽  
Cross Section ◽  
Tissue Imaging ◽  
Deep Tissue ◽  
Two Photon ◽  
Photon Excitation ◽  
Deep Tissue Imaging ◽  
Two Photon Excitation

Polythiophene nanoparticles with large TPA cross section and high1O2generation quantum yield have been developed for simultaneous lysosome-targetable fluorescence imaging and photodynamic therapy.

Sign in / Sign up

Export Citation Format

Share Document