High temperature continuous flow synthesis of CdSe/CdS/ZnS, CdS/ZnS, and CdSeS/ZnS nanocrystals

Nanoscale ◽  
2015 ◽  
Vol 7 (38) ◽  
pp. 15895-15903 ◽  
Author(s):  
Matt S. Naughton ◽  
Vivek Kumar ◽  
Yolanda Bonita ◽  
Kishori Deshpande ◽  
Paul J. A. Kenis
Keyword(s):  
High Temperature ◽  
Continuous Flow ◽  
High Quality ◽  
Flow Synthesis ◽  
Zns Nanocrystals

High temperature (up to 250 °C) continuous flow synthesis of high-quality, multi-layered Cd-based nanoparticles.

scholarly journals Continuous‐Flow Synthesis of High‐Quality Few‐Layer Antimonene Hexagons

2021 ◽  
pp. 2101616
Author(s):  
Iñigo Torres ◽  
Marta Alcaraz ◽  
Roger Sanchis‐Gual ◽  
Jose A. Carrasco ◽  
Michael Fickert ◽  
...  
Keyword(s):  
Continuous Flow ◽  
High Quality ◽  
Flow Synthesis

Light-driven high-temperature continuous-flow synthesis of TiO2 nano-anatase

2012 ◽  
Vol 211-212 ◽  
pp. 195-199 ◽  
Author(s):  
Benjamin C.Y. Chan ◽  
Xiaolin Wang ◽  
Lionel K.W. Lam ◽  
Jeffrey M. Gordon ◽  
Daniel Feuermann ◽  
...  
Keyword(s):  
High Temperature ◽  
Continuous Flow ◽  
Flow Synthesis

Continuous Flow Synthesis ofn-Alkyl Chlorides in a High-Temperature Microreactor Environment

2012 ◽  
Vol 17 (1) ◽  
pp. 152-157 ◽  
Author(s):  
Benedikt Reichart ◽  
Guenter Tekautz ◽  
C. Oliver Kappe
Keyword(s):  
High Temperature ◽  
Continuous Flow ◽  
Flow Synthesis

Rapid continuous flow synthesis of high-quality silver nanocubes and nanospheres

RSC Advances ◽  
2013 ◽  
Vol 3 (44) ◽  
pp. 22397 ◽  
Author(s):  
Hakim Mehenni ◽  
Lutfan Sinatra ◽  
Remi Mahfouz ◽  
Khabiboulakh Katsiev ◽  
Osman M. Bakr
Keyword(s):  
Continuous Flow ◽  
High Quality ◽  
Flow Synthesis ◽  
Silver Nanocubes

High-Temperature Synthesis of CdSe-Based Core/Shell, Core/Shell/Shell, and Core/Graded-Shell Nanoplatelets for Stable and Efficient Narrowband Emitters

2019 ◽  
Author(s):  
Aurelio A. Rossinelli ◽  
Henar Rojo ◽  
Aniket S. Mule ◽  
Marianne Aellen ◽  
Ario Cocina ◽  
...  
Keyword(s):  
Quantum Dots ◽  
High Temperature ◽  
Equilibrium Shape ◽  
Size Variation ◽  
Crystal Defects ◽  
Atomic Scale ◽  
Quantum Yields ◽  
Core Shell ◽  
Compositional Gradient ◽  
High Quality

<div>Colloidal semiconductor nanoplatelets exhibit exceptionally narrow photoluminescence spectra. This occurs because samples can be synthesized in which all nanoplatelets share the same atomic-scale thickness. As this dimension sets the emission wavelength, inhomogeneous linewidth broadening due to size variation, which is always present in samples of quasi-spherical nanocrystals (quantum dots), is essentially eliminated. Nanoplatelets thus offer improved, spectrally pure emitters for various applications. Unfortunately, due to their non-equilibrium shape, nanoplatelets also suffer from low photo-, chemical, and thermal stability, which limits their use. Moreover, their poor stability hampers the development of efficient synthesis protocols for adding high-quality protective inorganic shells, which are well known to improve the performance of quantum dots. <br></div><div>Herein, we report a general synthesis approach to highly emissive and stable core/shell nanoplatelets with various shell compositions, including CdSe/ZnS, CdSe/CdS/ZnS, CdSe/Cd<sub>x</sub>Zn<sub>1–x</sub>S, and CdSe/ZnSe. Motivated by previous work on quantum dots, we find that slow, high-temperature growth of shells containing a compositional gradient reduces strain-induced crystal defects and minimizes the emission linewidth while maintaining good surface passivation and nanocrystal uniformity. Indeed, our best core/shell nanoplatelets (CdSe/Cd<sub>x</sub>Zn<sub>1–x</sub>S) show photoluminescence quantum yields of 90% with linewidths as low as 56 meV (19.5 nm at 655 nm). To confirm the high quality of our different core/shell nanoplatelets for a specific application, we demonstrate their use as gain media in low-threshold ring lasers. More generally, the ability of our synthesis protocol to engineer high-quality shells can help further improve nanoplatelets for optoelectronic devices.</div>

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