Indium nitride quantum dots could shine the light for next-generation fiber optics

Scilight ◽  
2019 ◽  
Vol 2019 (25) ◽  
pp. 250005
Author(s):  
Jacob Berkowitz
Keyword(s):  
Quantum Dots ◽  
Fiber Optics ◽  
Indium Nitride ◽  
Next Generation

A Review on Quantum Dots: Synthesis to In- silico Analysis as Next Generation Antibacterial Agents

2019 ◽  
Vol 20 (3) ◽  
pp. 255-262 ◽  
Author(s):  
Sounik Manna ◽  
Munmun Ghosh ◽  
Ranadhir Chakraborty ◽  
Sudipto Ghosh ◽  
Santi M. Mandal
Keyword(s):  
Quantum Dots ◽  
Pathogenic Bacteria ◽  
Antibacterial Agents ◽  
Antimicrobial Properties ◽  
Binding Potential ◽  
Antibacterial Drug ◽  
Next Generation ◽  
Mechanism Of Reaction ◽  
High Level ◽  
Membrane Components

Succumbing to Multi-Drug Resistant (MDR) bacteria is a great distress to the recent health care system. Out of the several attempts that have been made to kill MDR pathogens, a few gained short-lived success. The failures, of the discovered or innovated antimicrobials, were mostly due to their high level of toxicity to hosts and the phenomenal rate of developing resistance by the pathogens against the new arsenal. Recently, a few quantum dots were tested against the pathogenic bacteria and therefore, justified for potential stockpiling of next-generation antibacterial agents. The key players for antimicrobial properties of quantum dots are considered to be Reactive Oxygen Species (ROS). The mechanism of reaction between bacteria and quantum dots needs to be better understood. They are generally targeted towards the cell wall and membrane components as lipoteichoic acid and phosphatidyl glycerol of bacteria have been documented here. In this paper, we have attempted to simulate ZnS quantum dots and have analysed their mechanism of reaction as well as binding potential to the above bacterial membrane components using CDOCKER. Results have shown a high level of antibacterial activity towards several pathogenic bacteria which specify their potentiality for future generation antibacterial drug development.

Toward phosphorescent and delayed fluorescent carbon quantum dots for next-generation electroluminescent displays

2021 ◽  
Author(s):  
Ting Yuan ◽  
Ting Meng ◽  
Yuxin Shi ◽  
Xianzhi Song ◽  
Wenjing Xie ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
High Thermal Stability ◽  
Next Generation ◽  
Low Cytotoxicity ◽  
Tunable Emission ◽  
Fluorescent Carbon

Featuring a combination of size-tunable emission wavelengths, high thermal stability, and low cytotoxicity, carbon quantum dots (CQDs) have opened up a new possibility for next-generation displays.

scholarly journals Next-generation quantum dots

2009 ◽  
Vol 27 (8) ◽  
pp. 732-733 ◽  
Author(s):  
Andrew M Smith ◽  
Shuming Nie
Keyword(s):  
Quantum Dots ◽  
Next Generation

Next-Generation DNA-Functionalized Quantum Dots as Biological Sensors

2017 ◽  
Vol 13 (7) ◽  
pp. 1705-1713 ◽  
Author(s):  
Ganglin Wang ◽  
Zhi Li ◽  
Nan Ma
Keyword(s):  
Quantum Dots ◽  
Biological Sensors ◽  
Next Generation

scholarly journals Transient Spectroscopy of Glass-Embedded Perovskite Quantum Dots: Novel Structures in an Old Wrapping

2018 ◽  
Vol 232 (9-11) ◽  
pp. 1495-1511 ◽  
Author(s):  
Oleg V. Kozlov ◽  
Rohan Singh ◽  
Bing Ai ◽  
Jihong Zhang ◽  
Chao Liu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Low Temperature ◽  
Fiber Optics ◽  
Room Temperature ◽  
Colloidal Particles ◽  
Thermal Quenching ◽  
Quantum Yields ◽  
Luminescent Solar Concentrators ◽  
Doped Glasses ◽  
Glass Matrices

Abstract Semiconductor doped glasses had been used by the research and engineering communities as color filters or saturable absorbers well before it was realized that their optical properties were defined by tiny specs of semiconductor matter known presently as quantum dots (QDs). Nowadays, the preferred type of QD samples are colloidal particles typically fabricated via organometallic chemical routines that allow for exquisite control of QD morphology, composition and surface properties. However, there is still a number of applications that would benefit from the availability of high-quality glass-based QD samples. These prospective applications include fiber optics, optically pumped lasers and amplifiers and luminescent solar concentrators (LSCs). In addition to being perfect optical materials, glass matrices could help enhance stability of QDs by isolating them from the environment and improving heat exchange with the outside medium. Here we conduct optical studies of a new type of all-inorganic CsPbBr3 perovskite QDs fabricated directly in glasses by high-temperature precipitation. These samples are virtually scattering free and exhibit excellent waveguiding properties which makes them well suited for applications in, for example, fiber optics and LSCs. However, the presently existing problem is their fairly low room-temperature emission quantum yields of only ca. 1%–2%. Here we investigate the reasons underlying the limited emissivity of these samples by conducting transient photoluminescence (PL) and absorption measurements across a range of temperatures from 20 to 300K. We observe that the low-temperature PL quantum yield of these samples can be as high as ~25%. However, it quickly drops (in a nearly linear fashion) with increasing temperature. Interestingly, contrary to traditional thermal quenching models, experimental observations cannot be explained in terms of a thermally activated nonradiative rate but rather suggest the existence of two distinct QD sub-ensembles of “emissive” and completely “nonemissive” particles. The temperature-induced variation in the PL efficiency is likely due to a structural transformation of the QD surfaces or interior leading to formation of extremely fast trapping sites or nonemissive phases resulting in conversion of emissive QDs into nonemissive. Thus, future efforts on improving emissivity of glass-based perovskite QD samples might focus on approaches for extending the range of stability of the low-temperature highly emissive structure/phase of the QDs up to room temperature.

scholarly journals Graphitic C3N4 quantum dots for next-generation QLED displays

2019 ◽  
Vol 22 ◽  
pp. 76-84 ◽  
Author(s):  
Liangrui He ◽  
Mi Fei ◽  
Jie Chen ◽  
Yunfei Tian ◽  
Yang Jiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Next Generation
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