Use of UV-Vis absorption spectroscopy in the characterization of cadmium chalcogenide colloidal quantum dots

2015 ◽  
Keyword(s):  
Quantum Dots ◽  
Absorption Spectroscopy ◽  
Colloidal Quantum Dots ◽  
Cadmium Chalcogenide

Quantum Dots Clusters as Self-Assembled Antennae with Phycocyanine and Phycobilisomes as Energy Acceptors

2021 ◽  
Author(s):  
Joanna M. Grzyb ◽  
Katarzyna Walczewska-Szewc ◽  
Jakub Sławski ◽  
Martyna Trojnar
Keyword(s):  
Quantum Dots ◽  
Monte Carlo ◽  
Colloidal Quantum Dots ◽  
Self Assembled

In this study, we investigated an experimental and Monte-Carlo computational characterization of self-assembled antennae built of CdTe colloidal quantum dots (QDs). These clusters provide efficient excitation of phycocyanine (PC) or...

PbSe/CdSe Thin-Shell Colloidal Quantum Dots

2015 ◽  
Vol 229 (1-2) ◽  
Author(s):  
Gary Zaiats ◽  
Diana Yanover ◽  
Roman Vaxenburg ◽  
Arthur Shapiro ◽  
Aron Safran ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cation Exchange ◽  
Thin Shell ◽  
Optical Characterization ◽  
Colloidal Quantum Dots

AbstractThe present work describes the structural and optical characterization of PbSe and PbSe/CdSe colloidal quantum dots (CQDs), the latter being produced by cation exchange of Pb

Synthesis and Characterization of Large PbSe Colloidal Quantum Dots

2021 ◽  
pp. 2000285
Author(s):  
Witold Palosz ◽  
Sudhir Trivedi ◽  
Eric DeCuir ◽  
Priyalal S. Wijewarnasuriya ◽  
Susanna M. Thon ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Synthesis And Characterization

scholarly journals Nonlinear Optical Characterization of InP@ZnS Core-Shell Colloidal Quantum Dots Using 532 nm, 10 ns Pulses

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1366
Author(s):  
Rashid A. Ganeev ◽  
Andrey I. Zvyagin ◽  
Ivan A. Shuklov ◽  
Maksim G. Spirin ◽  
Oleg V. Ovchinnikov ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Nonlinear Refraction ◽  
Colloidal Quantum Dots ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Core Shell ◽  
Nonlinear Scattering ◽  
532 Nm

InP@ZnS core-shell colloidal quantum dots (CQDs) were synthesized and characterized using the z-scan technique. The nonlinear refraction and nonlinear absorption coefficients (γ = −2 × 10−12 cm2 W−1, β = 4 × 10−8 cm W−1) of these CQDs were determined using 10 ns, 532 nm pulses. The saturable absorption (β = −1.4 × 10−9 cm W−1, Isat = 3.7 × 108 W cm−2) in the 3.5 nm CQDs dominated at small intensities of the probe pulses (I ≤ 7 × 107 W cm−2) followed by reverse saturable absorption at higher laser intensities. We report the optical limiting studies using these CQDs showing the suppression of propagated nanosecond radiation in the intensity range of 8 × 107–2 × 109 W cm−2. The role of nonlinear scattering is considered using off-axis z-scan scheme, which demonstrated the insignificant role of this process along the whole range of used intensities of 532 nm pulses. We discuss the thermal nature of the negative nonlinear refraction in the studied species.

Synthesis and characterization of InP and InN colloidal quantum dots

2005 ◽  
Author(s):  
Melissa R. Greenberg ◽  
Weiliang Chen ◽  
Ben N. Pulford ◽  
Gennady A. Smolyakov ◽  
Ying-Bing Jiang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Colloidal Quantum Dots ◽  
Synthesis And Characterization
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