Surface passivation assisted lasing emission in the quantum dots doped cholesteric liquid crystal resonating cavity with polymer template

RSC Advances ◽  
2014 ◽  
Vol 4 (95) ◽  
pp. 52804-52807 ◽  
Author(s):  
Lin-Jer Chen ◽  
Chia-Rong Lee ◽  
Chung-Liang Chu
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Liquid Crystal ◽  
Surface Passivation ◽  
Cholesteric Liquid Crystal ◽  
Core Shell ◽  
Polymer Template

A copolymer has been used as a template for enhanced optical properties of core–shell CdS/ZnSe quantum dots doped cholesteric liquid crystal.

scholarly journals Correction: Surface passivation assisted lasing emission in the quantum dots doped cholesteric liquid crystal resonating cavity with polymer template

RSC Advances ◽  
2015 ◽  
Vol 5 (22) ◽  
pp. 16640-16640
Author(s):  
Lin-Jer Chen ◽  
Chia-Rong Lee ◽  
Chung-Liang Chu
Keyword(s):  
Quantum Dots ◽  
Liquid Crystal ◽  
Surface Passivation ◽  
Cholesteric Liquid Crystal ◽  
Polymer Template

Correction for ‘Surface passivation assisted lasing emission in the quantum dots doped cholesteric liquid crystal resonating cavity with polymer template’ by Lin-Jer Chen et al., RSC Adv., 2014, 4, 52804–52807.

scholarly journals Synthesis and Optical Properties of Thiol Functionalized CdSe/ZnS (Core/Shell) Quantum Dots by Ligand Exchange

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Huaping Zhu ◽  
Michael Z. Hu ◽  
Lei Shao ◽  
Kui Yu ◽  
Reza Dabestani ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Ligand Exchange ◽  
Surface Passivation ◽  
Emission Spectra ◽  
Trioctylphosphine Oxide ◽  
Core Shell ◽  
Initial Surface ◽  
Cdse Core ◽  
Surface Modified

The colloidal photoluminescent quantum dots (QDs) of CdSe (core) and CdSe/ZnS (core/shell) were synthesized at different temperatures with different growth periods. Optical properties (i.e., UV/Vis spectra and photoluminescent emission spectra) of the resulting QDs were investigated. The shell-protected CdSe/ZnS QDs exhibited higher photoluminescent (PL) efficiency and stability than their corresponding CdSe core QDs. Ligand exchange with various thiol molecules was performed to replace the initial surface passivation ligands, that is, trioctylphosphine oxide (TOPO) and trioctylphosphine (TOP), and the optical properties of the surface-modified QDs were studied. The thiol ligand molecules in this study included 1,4-benzenedimethanethiol, 1,16-hexadecanedithiol, 1,11-undecanedithiol, biphenyl-4,4′-dithiol, 11-mercapto-1-undecanol, and 1,8-octanedithiol. After the thiol functionalization, the CdSe/ZnS QDs exhibited significantly enhanced PL efficiency and storage stability. Besides surface passivation effect, such enhanced performance of thiol-functionalized QDs could be due to cross-linked assembly formation of dimer/trimer clusters, in which QDs are linked by dithiol molecules. Furthermore, effects of ligand concentration, type of ligand, and heating on the thiol stabilization of QDs were also discussed.

Investigation of the Surface Passivation Effect on the Optical Properties of CsPbBr3 Perovskite Quantum Dots

2021 ◽  
Vol 23 ◽  
pp. 100948
Author(s):  
Saif M.H. Qaid ◽  
Hamid M. Ghaithan ◽  
Bandar Ali Al-Asbahi ◽  
Abdullah S. Aldwayyan
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Surface Passivation ◽  
Perovskite Quantum Dots

scholarly journals Effect of dopant concentration and the role of ZnS shell on optical properties of Sm3+ doped CdS quantum dots

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 7961-7971
Author(s):  
N. D. Vinh ◽  
P. M. Tan ◽  
P. V. Do ◽  
S. Bharti ◽  
V. X. Hoa ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Dopant Concentration ◽  
Core Shell ◽  
Cds Quantum Dots ◽  
Cds Qds

The role of samarium (Sm) dopant on the structural, morphological, and optical properties of CdS QDs and CdS/ZnS core/shell QDs was methodically reported.

Nonlinear optical properties of fast, photoswitchable cholesteric liquid crystal bandgaps

2011 ◽  
Vol 1 (5) ◽  
pp. 943 ◽  
Author(s):  
Uladzimir A. Hrozhyk ◽  
Svetlana V. Serak ◽  
Nelson V. Tabiryan ◽  
Timothy J. White ◽  
Timothy J. Bunning
Keyword(s):  
Optical Properties ◽  
Liquid Crystal ◽  
Nonlinear Optical ◽  
Cholesteric Liquid Crystal ◽  
Nonlinear Optical Properties

Effect of ZnS shell on optical properties of CdSe–ZnS core–shell quantum dots

2015 ◽  
Vol 39 ◽  
pp. 46-51 ◽  
Author(s):  
S. Mathew ◽  
Bishwajeet Singh Bhardwaj ◽  
Amit D. Saran ◽  
P. Radhakrishnan ◽  
V.P.N. Nampoori ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Core Shell

scholarly journals Effect of Doping ofCd1−xZnxS/ZnS Core/Shell Quantum Dots in Negative Dielectric Anisotropy Nematic Liquid Crystal p-Methoxybenzylidene p-Decylaniline

Crystals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 605
Author(s):  
Ayushi Rastogi ◽  
Fanindra Pandey ◽  
Rajiv Manohar ◽  
Shri Singh
Keyword(s):  
Quantum Dots ◽  
Liquid Crystal ◽  
Dielectric Permittivity ◽  
Nematic Liquid Crystal ◽  
Phase Shifters ◽  
Ion Trapping ◽  
Dielectric Anisotropy ◽  
Core Shell ◽  
Optical Parameters ◽  
Dielectric Parameters

We report the effect of the doping of Cd1−xZnxS/ZnS core/shell quantum dots (CSQDs) in nematic liquid crystal p-methoxybenzylidenep-decylaniline (MBDA) at 0.05 wt/wt%, 0.1 wt/wt%, 0.15 wt/wt%, 0.2 wt/wt%, 0.25 wt/wt%, and 0.3 wt/wt% concentrations of CSQDs in MBDA. Dielectric parameters with and without bias with respect to frequency have been investigated. The change in electro-optical parameters with temperature has also been demonstrated. The increase in the mean dielectric permittivity was found due to the large dipole moment of CSQDs, which impose stronger interactions with the liquid crystal molecules. The dielectric anisotropy changes sign on doping CSQDs in MBDA liquid crystal. It was concluded that the CSQD doping noticeably increased the dielectric permittivity of nematic MBDA in the presence of an electric field. The doping of CSQDs in nematic MBDA liquid crystal reduced the ion screening effect effectively. This phenomenon is attributed to the competition between the generated ionic impurities during the assembling process and the ion trapping effect of the CSQDs. The rotational viscosity of nematic liquid crystal decreased with increasing concentration of the CSQDs, with a faster response time observed for the 0.05 wt/wt% concentration. The birefringence of the doped system increased with the inclusion of CSQDs in MBDA. These results find application in the field of display devices, phase shifters, LC – gratings, TIR waveguide, industries, and projectors.

Balancing Electron Transfer and Surface Passivation in Gradient CdSe/ZnS Core–Shell Quantum Dots Attached to ZnO

2013 ◽  
Vol 4 (11) ◽  
pp. 1760-1765 ◽  
Author(s):  
Mohamed Abdellah ◽  
Karel Žídek ◽  
Kaibo Zheng ◽  
Pavel Chábera ◽  
Maria E. Messing ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Surface Passivation ◽  
Core Shell

scholarly journals Ultrafast optical properties of type-II CdZnS/ZnSe core-shell quantum dots

2018 ◽  
Vol 26 (14) ◽  
pp. 18480 ◽  
Author(s):  
Lingling Ran ◽  
Haiyang Li ◽  
Wenzhi Wu ◽  
Yachen Gao ◽  
Zhijun Chai ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Core Shell ◽  
Type Ii ◽  
Ultrafast Optical
Sign in / Sign up

Export Citation Format

Share Document