Sensitization Mechanism of Alumina Aerogels: Introducing Gd 3+ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb 3+

2021 ◽  
Vol 6 (41) ◽  
pp. 11270-11275
Author(s):  
Jinyao Cao ◽  
Linqiang Mao ◽  
Bingying Gao
Keyword(s):  
Luminescence Intensity ◽  
Alumina Aerogels

Dual vis-NIR emissive heterometallic naphthoates of Eu-Yb-Gd: new approach toward Yb luminescence intensity increase through Eu→Yb energy transfer

2021 ◽  
Author(s):  
Jae Hoon Kim ◽  
Leonid Lepnev ◽  
Valentina V. Utochnikova
Keyword(s):  
Energy Transfer ◽  
Luminescence Intensity ◽  
Intensity Increase ◽  
New Approach ◽  
New Phase

Homo- and heteroligand mono-, bi-, and trimetallic lanthanide naphthoates EuxYbyGd1-x-y(naph)3(Phen)n (n = 0, 1) were obtained and thoroughly investigated. Homoligand naphthoates of the new phase were obtained as unhydrous powders...

scholarly journals Self-assembly induced luminescence of Eu3+-complexes and application in bioimaging

2021 ◽  
Author(s):  
Ping-Ru Su ◽  
Tao Wang ◽  
Pan-Pan Zhou ◽  
Xiao-Xi Yang ◽  
Xiao-Xia Feng ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rare Earth ◽  
Luminescence Intensity ◽  
Self Assembly ◽  
Room Temperature ◽  
Molecular Motion ◽  
Proof Of Concept ◽  
Room Temperature Phosphorescence ◽  
New Strategy ◽  
Size Controlled

Abstract Design and engineering of highly efficient emitting materials with assembly-induced luminescence, such as room temperature phosphorescence (RTP) and aggregation-induced emission (AIE), have stimulated extensive efforts. Here, we propose a new strategy to obtain size-controlled Eu3+-complex nanoparticles (Eu-NPs) with self-assembly induced luminescence (SAIL) characteristics without encapsulation or hybridization. Compared with previous RTP or AIE materials, the SAIL phenomena of increased luminescence intensity and lifetime in aqueous solution for the proposed Eu-NPs are due to the combined effect of self-assembly in confining the molecular motion and shielding the water quenching. As a proof of concept, we also show that this system can be further applied in bioimaging, temperature measurement and HClO sensing. The SAIL activity of the rare-earth (RE) system proposed here offers a further step forward on the roadmap for the development of RE light conversion systems and their integration in bioimaging and therapy applications.

Correlation between the violet luminescence intensity and defect density in AlN epilayers grown by ammonia-source molecular beam epitaxy

2008 ◽  
Vol 5 (6) ◽  
pp. 2129-2132 ◽  
Author(s):  
Takuya Hoshi ◽  
Takahiro Koyama ◽  
Mariko Sugawara ◽  
Akira Uedono ◽  
John F. Kaeding ◽  
...  
Keyword(s):  
Molecular Beam Epitaxy ◽  
Luminescence Intensity ◽  
Molecular Beam ◽  
Defect Density ◽  
Violet Luminescence ◽  
Ammonia Source

scholarly journals Creating a human-induced pluripotent stem cell-based NKX2.5 reporter gene assay for developmental toxicity testing

2021 ◽  
Author(s):  
Karin Lauschke ◽  
Andreas Frederik Treschow ◽  
Mikkel Aabech Rasmussen ◽  
Nichlas Davidsen ◽  
Bjørn Holst ◽  
...  
Keyword(s):  
Stem Cell ◽  
Reporter Gene ◽  
Luminescence Intensity ◽  
Developmental Toxicity ◽  
Embryonic Stem ◽  
Embryoid Bodies ◽  
Luciferase Reporter ◽  
Reporter Cell ◽  
Gene Assay ◽  
Induced Pluripotent

AbstractTo test large numbers of chemicals for developmental toxicity, rapid in vitro tests with standardized readouts for automated data acquisition are needed. However, the most widely used assay, the embryonic stem cell test, relies on the counting of beating embryoid bodies by visual inspection, which is laborious and time consuming. We previously developed the PluriBeat assay based on differentiation of human induced pluripotent stem cells (hiPSC) that we demonstrated to be predictive for known teratogens at relevant concentrations using the readout of beating cardiomyocytes. Here, we report the development of a novel assay, which we term the PluriLum assay, where we have introduced a luciferase reporter gene into the locus ofNKX2.5of our hiPSC line. This enabled us to measure luminescence intensities instead of counting beating cardiomyocytes, which is less labor intensive. We established twoNKX2.5reporter cell lines and validated their pluripotency and genetic stability. Moreover, we confirmed that the genetically engineeredNKX2.5reporter cell line differentiated into cardiomyocytes with the same efficiency as the original wild-type line. We then exposed the cells to valproic acid (25–300 μM) and thalidomide (0.1–36 µM) and compared the PluriBeat readout of the cardiomyocytes with the luminescence intensity of the PluriLum assay. The results showed that thalidomide decreased luminescence intensity significantly with a higher potency and efficacy compared to the beating readout. With this, we have developed a novel hiPSC-based assay with a standardized readout that may have the potential for higher throughput screening for developmental toxicity.

Temperature Dependence of Luminescence Intensity of Tb3+ Complexes

1970 ◽  
Vol 52 (9) ◽  
pp. 4912-4914 ◽  
Author(s):  
R. W. Harrigan ◽  
G. A. Crosby
Keyword(s):  
Temperature Dependence ◽  
Luminescence Intensity

A cyclic peptide antenna ligand for enhancing terbium luminescence

The Analyst ◽  
2021 ◽  
Author(s):  
Fei Ji ◽  
Shiqun Shao ◽  
Zhonghan Li ◽  
Siwen Wang ◽  
Rohit Chaudhuri ◽  
...  
Keyword(s):  
Luminescence Intensity ◽  
Cyclic Peptide ◽  
Peptide Ligand ◽  
Antenna Effect ◽  
Terbium Ion ◽  
Antenna Ligand ◽  
Terbium Luminescence

We present here a cyclic peptide ligand, cy(WQETR), that binds to the terbium ion (Tb3+) and enhances Tb3+ luminescence intensity through the antenna effect.

Luminescence Intensity Enhancement of Copper Doped Hydronium Alunite Synthesized under Hydrothermal Conditions Using Sulfates Solution

2014 ◽  
Vol 90 ◽  
pp. 127-132
Author(s):  
Yuichiro Kuroki ◽  
Takashi Hatsuse ◽  
Tomoichiro Okamoto ◽  
Masasuke Takata
Keyword(s):  
Crystal Structure ◽  
Luminescence Intensity ◽  
Single Phase ◽  
Elemental Sulfur ◽  
Nitrate Solution ◽  
Hydrothermal Condition ◽  
Copper Nitrate ◽  
Hydrothermal Conditions ◽  
Photoluminescence Peak ◽  
Blue Photoluminescence

A novel phosphor, copper doped hydronium alunite ((H3O)Al3(SO4)2(OH)6:Cu), exhibiting a blue photoluminescence peak at a wavelength of 420 nm was successfully synthesized from aluminum and copper sulfates solution under hydrothermal condition (240 °C, 60 min). The measurement of XRD revealed that the obtained products were single phase with a crystal structure of (H3O)Al3(SO4)2(OH)6. Luminescence intensity of (H3O)Al3(SO4)2(OH)6:Cu synthesized from sulfates solution was 6.2 times higher than that from an aluminum nitrate solution mixed with an elemental sulfur and a copper nitrate solution. The increase of luminescence intensity was resulted from an improvement of the crystallinity of (H3O)Al3(SO4)2(OH)6.

Sign in / Sign up

Export Citation Format

Share Document