Coordinatively Self-Assembled Luminescent Gold Nanoparticles: Fluorescence Turn-On System for High-Efficiency Passive Tumor Imaging

2017 ◽  
Vol 9 (6) ◽  
pp. 5118-5127 ◽  
Author(s):  
Xuandi Lai ◽  
Lishan Tan ◽  
Xiulong Deng ◽  
Jinbin Liu ◽  
Aiqing Li ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
High Efficiency ◽  
Tumor Imaging ◽  
Turn On ◽  
Self Assembled ◽  
Fluorescence Turn On

Improved Detection of Hg2+ in Aqueous Solution with High Sensitivity and Selectivity by Using Mercury-Specific DNA, Sybr Green I and Gold Nanoparticles

2011 ◽  
Vol 239-242 ◽  
pp. 934-939
Author(s):  
Hui Xu ◽  
Shuli Gao ◽  
Jian Nong Chen ◽  
Quan Wen Liu
Keyword(s):  
Gold Nanoparticles ◽  
High Sensitivity ◽  
Sybr Green ◽  
Sybr Green I ◽  
Fluorescence Signal ◽  
Potassium Ions ◽  
Label Free ◽  
Turn On ◽  
Sensitivity And Selectivity ◽  
Fluorescence Turn On

We report a label-free, fast, fluorescence turn on assay for Hg2+detecton by using mercury-specific DNA (MSD), Sybr Green I (SG) and gold nanoparticles (AuNPs). SG efficiently discriminates MSD and MSD/Hg2+complex. The addition of gold nanoparticle decreases the background fluorescence signal further for MSD. The fluorescence intensity of MSD/Hg2+complex keeps constant after addition of AuNPs. This property improves the signal-to-background ratio and decreases the detection limitation further. In addition, the method shows improved selectivity compared with that in the absence of AuNPs. This strategy could be applied to the detection of potassium ions and showed good generality.

Self-assembled nanoparticles of p-phenylenediacetonitrile derivatives with fluorescence turn-on

2012 ◽  
Vol 14 (6) ◽  
Author(s):  
Karolis Kazlauskas ◽  
Arūnas Miasojedovas ◽  
Darius Dobrovolskas ◽  
Eglė Arbačiauskienė ◽  
Vytautas Getautis ◽  
...  
Keyword(s):  
Turn On ◽  
Self Assembled ◽  
Fluorescence Turn On

Self-Assembled Glycobis(acrylamide)-Stabilized Gold Nanoparticles for Fluorescent Turn-on Sensing of Lectin and Escherichia coli

2019 ◽  
Vol 3 (2) ◽  
pp. 1307-1317
Author(s):  
Juby K. Ajish ◽  
Anant B. Kanagare ◽  
K. S. Ajish Kumar ◽  
Mahesh Subramanian ◽  
Anand Damodar Ballal ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Gold Nanoparticles ◽  
Turn On ◽  
Self Assembled

scholarly journals Self-Assembled Triphenylphosphonium-Conjugated Dicyanostilbene Nanoparticles and Their Fluorescence Probes for Reactive Oxygen Species

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1034
Author(s):  
Wonjin Choi ◽  
Na Lim ◽  
Heekyoung Choi ◽  
Moo Seo ◽  
Junho Ahn ◽  
...  
Keyword(s):  
Fluorescence Probes ◽  
Guest Molecules ◽  
Structural Conversion ◽  
Strong Emission ◽  
New Approach ◽  
Turn On ◽  
Emission Enhancement ◽  
Spherical Structures ◽  
Self Assembled ◽  
Fluorescence Turn On

We report self-assembled novel triphenylphosphonium-conjugated dicyanostilbene-based as selective fluorescence turn-on probes for 1O2 and ClO−. Mono- or di-triphenylphosphonium-conjugated dicyanostilbene derivatives 1 and 2 formed spherical structures with diameters of ca. 27 and 56.5 nm, respectively, through π-π interaction between dicyanostilbene groups. Self-assembled 1 showed strong fluorescent emission upon the addition of 1O2 and ClO− compared to other ROS (O2−, •OH, NO, TBHP, H2O2, GSH), metal ions (K+, Na+), and amino acids (cysteine and histidine). Upon addition of 1O2 and ClO−, the spherical structure of 1 changed to a fiber structure (8-nm wide; 300-nm long). Upon addition of 1O2 and ClO−, the chemical structural conversion of 1 was determined by FAB-Mass, NMR, IR and Zeta potential analysis, and the strong emission of the self-assembled 1 was due to an aggregation-induced emission enhancement. This self-assembled material was the first for selective ROS as a fluorescence turn-on probe. Thus, a nanostructure change-derived turn-on sensing strategy for 1O2 or ClO− may offer a new approach to developing methods for specific guest molecules in biological and environmental subjects.

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