Boron nitride dots In-situ embedded in a B2O3 matrix with the long lifetime Room-Temperature phosphorescence in dry and wet states

2021 ◽  
Vol 417 ◽  
pp. 129175
Author(s):  
Shenghui Han ◽  
Gang Lian ◽  
Xu Zhang ◽  
Zhaozhen Cao ◽  
Qilong Wang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Long Lifetime

Long lifetime phosphorescence and X-ray scintillation of chlorobismuthate hybrids incorporating ionic liquid cations

2021 ◽  
Author(s):  
Jian-Ce Jin ◽  
Yang-Peng Lin ◽  
Yi-Heng Wu ◽  
Liaokuo Gong ◽  
Nan-Nan Shen ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
X Ray ◽  
Long Lifetime

Two chlorobismuthate hybrids incorportating ionic liquid cations (ILCs) with second-level room-temperature phosphorescence (RTP) were obtained, namely [Emim]BiCl4(bp2do) (1) and [Emmim]BiCl4(bp2do) (2) (Emim = 1-ethyl-3-methylimidazolium, Emmim = 1-ethyl-2,3-dimethylimidazolium, bp2do = 2,2'-bipyridyl-1,1'-dioxide)....

In situ growth of metal nanoparticles on boron nitride nanosheets as highly efficient catalysts

2016 ◽  
Vol 4 (48) ◽  
pp. 19107-19115 ◽  
Author(s):  
Li Fu ◽  
Guoxin Chen ◽  
Nan Jiang ◽  
Jinhong Yu ◽  
Cheng-Te Lin ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Metal Nanoparticles ◽  
Room Temperature ◽  
Reducing Agent ◽  
Metal Nanoparticle ◽  
In Situ Growth ◽  
Boron Nitride Nanosheets ◽  
Highly Efficient ◽  
Boron Nitride Nanosheet

We report a facile and general approach for the synthesis of boron nitride nanosheet (BNNS)–metal nanoparticle (NP) composites at room temperature without adding any reducing agent.

scholarly journals Highly Efficient Heavy Atom Free Room Temperature Phosphorescence by Host-Guest Doping

2021 ◽  
Vol 9 ◽  
Author(s):  
Jinzhu Cao ◽  
Meng Zhang ◽  
Manjeet Singh ◽  
Zhongfu An ◽  
Lingfei Ji ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Room Temperature ◽  
Heavy Atom ◽  
Molar Ratio ◽  
Ambient Conditions ◽  
Room Temperature Phosphorescence ◽  
Highly Efficient ◽  
Long Lifetime ◽  
Remarkable Progress

Recently, there has been remarkable progress of the host-guest doped pure organic room-temperature phosphorescence (RTP) materials. However, it remains a great challenge to develop highly efficient host-guest doping systems. In this study, we have successfully developed a heavy atom free pure organic molecular doped system (benzophenone-thianthrene, respectively) with efficient RTP through a simple host-guest doping strategy. Furthermore, by optimizing the doping ratios, the host-guest material with a molar ratio of 100:1 presented an efficient RTP emission with 46% quantum efficiency and a long lifetime of up to 9.17 ms under ambient conditions. This work will provide an effective way to design new organic doping systems with RTP.

Efficient long lifetime room temperature phosphorescence of carbon dots in a potash alum matrix

2015 ◽  
Vol 3 (12) ◽  
pp. 2798-2801 ◽  
Author(s):  
Xinwei Dong ◽  
Liangming Wei ◽  
Yanjie Su ◽  
Zhongli Li ◽  
Huijuan Geng ◽  
...  
Keyword(s):  
Carbon Dots ◽  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Composite Powders ◽  
Carbon Dot ◽  
Long Lifetime

Carbon dot composite powders show long phosphorescence lifetimes when the carbon dots are dispersed into a potash alum matrix.

Siloxy Group-Induced Highly Efficient Room Temperature Phosphorescence with Long Lifetime

2016 ◽  
Vol 120 (21) ◽  
pp. 11631-11639 ◽  
Author(s):  
Masaki Shimizu ◽  
Ryosuke Shigitani ◽  
Masaki Nakatani ◽  
Keiko Kuwabara ◽  
Yusuke Miyake ◽  
...  
Keyword(s):  
Room Temperature ◽  
Room Temperature Phosphorescence ◽  
Highly Efficient ◽  
Long Lifetime

scholarly journals Guest-host doped strategy for constructing ultralong-lifetime near-infrared organic phosphorescence materials for bioimaging

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Fuming Xiao ◽  
Heqi Gao ◽  
Yunxiang Lei ◽  
Wenbo Dai ◽  
Miaochang Liu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Near Infrared ◽  
Tumor Imaging ◽  
Energy Gap ◽  
Radiative Transition ◽  
Room Temperature Phosphorescence ◽  
Triplet Energy ◽  
Long Wavelength ◽  
Long Lifetime ◽  
First Time

AbstractOrganic near-infrared room temperature phosphorescence materials have unparalleled advantages in bioimaging due to their excellent penetrability. However, limited by the energy gap law, the near-infrared phosphorescence materials (>650 nm) are very rare, moreover, the phosphorescence lifetimes of these materials are very short. In this work, we have obtained organic room temperature phosphorescence materials with long wavelengths (600/657–681/732 nm) and long lifetimes (102–324 ms) for the first time through the guest-host doped strategy. The guest molecule has sufficient conjugation to reduce the lowest triplet energy level and the host assists the guest in exciton transfer and inhibits the non-radiative transition of guest excitons. These materials exhibit good tissue penetration in bioimaging. Thanks to the characteristic of long lifetime and long wavelength emissive phosphorescence materials, the tumor imaging in living mice with a signal to background ratio value as high as 43 is successfully realized. This work provides a practical solution for the construction of organic phosphorescence materials with both long wavelengths and long lifetimes.

scholarly journals Ultralong lifetime and efficient room temperature phosphorescent carbon dots through multi-confinement structure design

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuqiong Sun ◽  
Shuting Liu ◽  
Luyi Sun ◽  
Shuangshuang Wu ◽  
Guangqi Hu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Carbon Dots ◽  
Room Temperature ◽  
Structure Design ◽  
Room Temperature Phosphorescence ◽  
Long Lifetime ◽  
Optical Applications ◽  
Triplet Excited States ◽  
Exceptional Stability ◽  
Harsh Conditions

Abstract Room temperature phosphorescence materials have inspired extensive attention owing to their great potential in optical applications. However, it is hard to achieve a room temperature phosphorescence material with simultaneous long lifetime and high phosphorescence quantum efficiency. Herein, multi-confined carbon dots were designed and fabricated, enabling room temperature phosphorescence material with simultaneous ultralong lifetime, high phosphorescence quantum efficiency, and excellent stability. The multi-confinement by a highly rigid network, stable covalent bonding, and 3D spatial restriction efficiently rigidified the triplet excited states of carbon dots from non-radiative deactivation. The as-designed multi-confined carbon dots exhibit ultralong lifetime of 5.72 s, phosphorescence quantum efficiency of 26.36%, and exceptional stability against strong oxidants, acids and bases, as well as polar solvents. This work provides design principles and a universal strategy to construct metal-free room temperature phosphorescence materials with ultralong lifetime, high phosphorescence quantum efficiency, and high stability for promising applications, especially under harsh conditions.

Otoconia perfect/imperfect crystals

1994 ◽  
Vol 52 ◽  
pp. 42-43
Author(s):  
César D. Fermin ◽  
Dale Martin
Keyword(s):  
Image Processing ◽  
Room Temperature ◽  
Phosphotungstic Acid ◽  
Gallus Domesticus ◽  
Crystal Matrix ◽  
Organic Templates ◽  
Image Processing Algorithms ◽  
Processing Algorithms ◽  
Diffraction Patterns

Otoconia of higher vertebrates are interesting biological crystals that display the diffraction patterns of perfect crystals (e.g., calcite for birds and mammal) when intact, but fail to produce a regular crystallographic pattern when fixed. Image processing of the fixed crystal matrix, which resembles the organic templates of teeth and bone, failed to clarify a paradox of biomineralization described by Mann. Recently, we suggested that inner ear otoconia crystals contain growth plates that run in different directions, and that the arrangement of the plates may contribute to the turning angles seen at the hexagonal faces of the crystals.Using image processing algorithms described earlier, and Fourier Transform function (2FFT) of BioScan Optimas®, we evaluated the patterns in the packing of the otoconia fibrils of newly hatched chicks (Gallus domesticus) inner ears. Animals were fixed in situ by perfusion of 1% phosphotungstic acid (PTA) at room temperature through the left ventricle, after intraperitoneal Nembutal (35mg/Kg) deep anesthesia. Negatives were made with a Hitachi H-7100 TEM at 50K-400K magnifications. The negatives were then placed on a light box, where images were filtered and transferred to a 35 mm camera as described.

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