cadmium selenide quantum dots
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2021 ◽  
pp. 130794
Author(s):  
Reena K Sajwan ◽  
Purnima Sharma ◽  
GBVS Lakshmi ◽  
Pratima R Solanki

2021 ◽  
Vol 8 (8) ◽  
pp. 210141
Author(s):  
Irene Andreu ◽  
Tuan M. Ngo ◽  
Viridiana Perez ◽  
Matthew W. Bilton ◽  
Kelly E. C. Cadieux ◽  
...  

This study investigates the potential spread of cadmium selenide quantum dots in laboratory environments through contact of gloves with simulated dry spills on laboratory countertops. Secondary transfer of quantum dots from the contaminated gloves to other substrates was initiated by contact of the gloves with different materials found in the laboratory. Transfer of quantum dots to these substrates was qualitatively evaluated by inspection under ultraviolet illumination. This secondary contact resulted in the delivery of quantum dots to all the evaluated substrates. The amount of quantum dots transferred was quantified by elemental analysis. The residue containing quantum dots picked up by the glove was transferred to at least seven additional sections of the pristine substrate through a series of sequential contacts. These results demonstrate the potential for contact transfer as a pathway for spreading nanomaterials throughout the workplace, and that 7-day-old dried spills are susceptible to the propagation of nanomaterials by contact transfer. As research and commercialization of engineered nanomaterials increase worldwide, it is necessary to establish safe practices to protect workers from the potential for chronic exposure to potentially hazardous materials. Similar experimental procedures to those described herein can be adopted by industries or regulatory agencies to guide the development of their nanomaterial safety programmes.


Author(s):  
Mohammad Mominur Rahman ◽  
Mohammad Rezaul Karim ◽  
Hamad F. Alharbi ◽  
Belal Aldokhayel ◽  
Md. Hasan Zahir ◽  
...  

2021 ◽  
Vol 12 (35) ◽  
pp. 5106-5116
Author(s):  
Yifan Zhu ◽  
Emira Ramadani ◽  
Eilaf Egap

We report here a rapid visible-light-induced radical polymerization in aqueous media photoinitiated by only ppm level thiol ligand capped cadmium selenide quantum dots. The photoinitiation system could be readily employed for photo 3D printing.


2020 ◽  
Vol 5 (46) ◽  
pp. 14783-14787
Author(s):  
Antonella F. Carrizo ◽  
Juan E. Argüello ◽  
Luciana C. Schmidt ◽  
Juan P. Colomer

2020 ◽  
Vol 20 (12) ◽  
pp. 7710-7715
Author(s):  
Emusani Ramya ◽  
Dushyant Kushavah ◽  
M. Veeramohan RaO ◽  
T. Arun Kumar ◽  
D. Narayana Rao

We synthesis different sizes of cadmium selenide quantum dots (CdSe QDs) and their linear and nonlinear optical properties. Size-controlled CdSe QDs are characterized by ultraviolet-visible absorption, photoluminescence, transmission electron microscope (TEM), and Z-scan techniques. Redshift was observed in the linear absorption and photoluminescence with an increase in the size of CdSe QDs. TEM images show the sizes of the QDs are 2.2 nm–4.9 nm. Bandgap tuning CdSe QDs of third-order nonlinear optical properties are investigated at 532 nm with an open aperture Z-scan technique using a picosecond laser. These CdSe QDs can be used as optical limiters.


Solar Energy ◽  
2020 ◽  
Vol 209 ◽  
pp. 108-117 ◽  
Author(s):  
Jwaher M. AlGhamdi ◽  
Shorooq AlOmar ◽  
Mohammed A. Gondal ◽  
Redhwan Moqbel ◽  
Mohamed A. Dastageer

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