Effects of the dark-exciton state on photoluminescence dynamics in surface-modified CdS quantum dots prepared by a colloidal method

2004 ◽  
Vol 21 (2-4) ◽  
pp. 363-366 ◽  
Author(s):  
DaeGwi Kim ◽  
Tomoyuki Mishima ◽  
Masaaki Nakayama
Keyword(s):  
Quantum Dots ◽  
Exciton State ◽  
Cds Quantum Dots ◽  
Colloidal Method ◽  
Surface Modified ◽  
Dark Exciton

High third-order non-resonant optical non-linearities of surface modified CdS quantum dots embedded in BaTiO3 thin film

2003 ◽  
Vol 437 (1-2) ◽  
pp. 217-222 ◽  
Author(s):  
Yong Yang ◽  
Jianlin Shi ◽  
Shugang Dai ◽  
Xueguo Zhao ◽  
Xianghua Wang
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Cds Quantum Dots ◽  
Third Order ◽  
Batio3 Thin Film ◽  
Surface Modified

Surface-modified CdS quantum dots as luminescent probes for sulfadiazine determination

2008 ◽  
Vol 70 (5) ◽  
pp. 1198-1202 ◽  
Author(s):  
Mingming Liu ◽  
Li Xu ◽  
Weiqing Cheng ◽  
Yu Zeng ◽  
Zhengyu Yan
Keyword(s):  
Quantum Dots ◽  
Cds Quantum Dots ◽  
Luminescent Probes ◽  
Surface Modified

Photoluminescence dynamics of energy transfer between CdS quantum dots prepared by a colloidal method

2007 ◽  
Vol 122-123 ◽  
pp. 471-473 ◽  
Author(s):  
Kazuyuki Tomihira ◽  
Dae Gwi Kim ◽  
Masaaki Nakayama
Keyword(s):  
Quantum Dots ◽  
Energy Transfer ◽  
Cds Quantum Dots ◽  
Colloidal Method

BIEXCITONIC EFFECT ON TRANSIENT NONLINEAR REFRACTION AND ABSORPTION IN A MAGNETIZED CdS QUANTUM DOTS

2011 ◽  
Vol 10 (04n05) ◽  
pp. 675-679 ◽  
Author(s):  
SWATI GOYAL ◽  
PRANAY K. SEN
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Nonlinear Absorption ◽  
Perturbation Technique ◽  
Nonlinear Refraction ◽  
Fundamental Absorption Edge ◽  
Exciton State ◽  
Magnetic Field Effects ◽  
Cds Quantum Dots ◽  
Nonlinear Optical Susceptibility

Transient optical nonlinearities of semiconductor quantum dots in the strongly confined regime are studied, in which the exciton, biexciton and magnetic field effects are taken into account. The photo induced band-to-band electronic transitions are considered from both the heavy-hole (hh) and light-hole (lh) valence bands to the lowest (1s) exciton state below the fundamental absorption edge. The time dependent perturbation technique for a three-level system, under the near band gap resonant excitation regime, has been employed; with the incorporation of the relaxation and dephasing mechanisms phenomenologically. The induced polarization is calculated from where the real and imaginary parts of the third-order nonlinear optical susceptibility, responsible for the occurrence of nonlinear refraction and nonlinear absorption respectively, have been derived. The temporal and detuning spectra of nonlinear refraction and absorption; and their dependence on density of biexcitons and a moderately strong magnetic field, have been analyzed. It is observed that the nonlinear refraction and nonlinear absorption enhance with increasing magnetic field in small CdS quantum dots.

Enhanced electrochemiluminescence of CdS quantum dots capped with mercaptopropionic acid activated by EDC for Zika virus detection

The Analyst ◽  
2021 ◽  
Author(s):  
Hui-Jun Zhang ◽  
Jin Zhu ◽  
Ning Bao ◽  
Shou-Nian Ding
Keyword(s):  
Quantum Dots ◽  
Zika Virus ◽  
Virus Detection ◽  
Cds Quantum Dots ◽  
Mercaptopropionic Acid ◽  
Sandwich Type ◽  
Cds Qds

The mechanism of enhanced ECL of MPA@CdS QDs by EDC activation was investigated, and a sandwich-type ECL immunosensor has been designed for Zika virus detection.

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