scholarly journals Measuring the Ultrafast Spectral Diffusion Dynamics of Colloidal CdSe Nanomaterials

MRS Advances ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 1-7 ◽  
Author(s):  
Thanh Nhut Do ◽  
Cheng Zhang ◽  
Xuanwei Ong ◽  
Jie Lian ◽  
Yinthai Chan ◽  
...  
Keyword(s):  
Heavy Hole ◽  
Electronic Spectroscopy ◽  
Nodal Line ◽  
Spectral Diffusion ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Decay Component ◽  
Diffusion Dynamics ◽  
Line Slope ◽  
Hole Transition

AbstractWe use ultrafast coherent two-dimensional electronic spectroscopy (2DES) to study the ultrafast spectral diffusion dynamics of colloidal CdSe quantum dots (QDs) and CdSe nanoplatelets (NPLs). The Center Line Slope (CLS) and Nodal Line Slope (NLS) techniques were employed to analyse the 2DES spectra. We show that no spectral diffusion dynamics occurs for the CdSe QDs. On the other hand, spectral diffusion was observed in the CdSe 5 mono-layers NPLs heavy-hole transition. The normalized Frequency Fluctuation Correlation Function (FFCF) of the CdSe NPLs heavy-hole transition was measured to have a major fast decay component at 140 fs.

Studying the spectral diffusion dynamics of chlorophyll a and chlorophyll b using two-dimensional electronic spectroscopy

2019 ◽  
Vol 527 ◽  
pp. 110480 ◽  
Author(s):  
M. Faisal Khyasudeen ◽  
Paweł J. Nowakowski ◽  
Hoang Long Nguyen ◽  
Jamie H.N. Sim ◽  
Thanh Nhut Do ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Electronic Spectroscopy ◽  
Spectral Diffusion ◽  
Chlorophyll B ◽  
Two Dimensional ◽  
Diffusion Dynamics

scholarly journals Hot electron and hole dynamics in thiol-capped CdSe quantum dots revealed by 2D electronic spectroscopy

2016 ◽  
Vol 18 (37) ◽  
pp. 26199-26204 ◽  
Author(s):  
Nils Lenngren ◽  
Mohamed A. Abdellah ◽  
Kaibo Zheng ◽  
Mohammed J. Al-Marri ◽  
Donatas Zigmantas ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electronic Spectroscopy ◽  
Cdse Quantum Dots ◽  
Hot Electron ◽  
Cdse Qds

State-specific relaxation and trapping of excitations in thiol-capped CdSe QDs is followed by 2D electronic spectroscopy.

Ultrafast fs coherent excitonic dynamics in CdSe quantum dots assemblies addressed and probed by 2D electronic spectroscopy

2021 ◽  
Vol 154 (1) ◽  
pp. 014301
Author(s):  
Elisabetta Collini ◽  
Hugo Gattuso ◽  
R. D. Levine ◽  
F. Remacle
Keyword(s):  
Quantum Dots ◽  
Electronic Spectroscopy ◽  
Cdse Quantum Dots

scholarly journals Exploring size and state dynamics in CdSe quantum dots using two-dimensional electronic spectroscopy

2014 ◽  
Vol 140 (8) ◽  
pp. 084701 ◽  
Author(s):  
Justin R. Caram ◽  
Haibin Zheng ◽  
Peter D. Dahlberg ◽  
Brian S. Rolczynski ◽  
Graham B. Griffin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electronic Spectroscopy ◽  
Cdse Quantum Dots ◽  
Two Dimensional

scholarly journals Intense Visible Luminescence in CdSe Quantum Dots by Efficiency Surface Passivation with H2O Molecules

2012 ◽  
Vol 2012 ◽  
pp. 1-6
Author(s):  
Hyeoung Woo Park ◽  
Do-Hyung Kim
Keyword(s):  
Heat Treatment ◽  
Quantum Dots ◽  
Quantum Yield ◽  
Surface Passivation ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
Effect Of Water ◽  
Visible Luminescence ◽  
Luminescence Efficiency

We have investigated the effect of water (H2O) cooling and heat treatment on the luminescence efficiency of core CdSe quantum dots (QDs). The photoluminescence (PL) quantum yield of the CdSe QDs was enhanced up to ~85%, and some periodic bright points were observed in wide color ranges during the heat treatment of QDs mixed with H2O. The PL enhancement of QDs could be attributed to the recovery of QDs surface traps by unreacted ligands confined within the hydrophilic H2O molecule containers.

Developed one-pot synthesis of dual-color CdSe quantum dots for white light-emitting diode application

2018 ◽  
Vol 6 (12) ◽  
pp. 3089-3096 ◽  
Author(s):  
Sheng Dai ◽  
Cyuan-Bin Siao ◽  
Shu-Ru Chung ◽  
Kuan-Wen Wang ◽  
Xiaoqing Pan
Keyword(s):  
Quantum Dots ◽  
White Light ◽  
Light Emitting Diode ◽  
Cdse Quantum Dots ◽  
Cdse Qds ◽  
One Pot ◽  
Synthetic Process ◽  
Light Emitting ◽  
One Pot Synthesis ◽  
Enhanced Stability

The size and fraction of red and green CdSe QDs can be controlled precisely during the synthetic process, thus manifesting remarkably enhanced stability.

Optimizing electron transfer from CdSe QDs to hydrogenase for photocatalytic H2 production

2019 ◽  
Vol 55 (39) ◽  
pp. 5579-5582 ◽  
Author(s):  
Monica L. K. Sanchez ◽  
Chang-Hao Wu ◽  
Michael W. W. Adams ◽  
R. Brian Dyer
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Reduction Potential ◽  
H2 Production ◽  
Cdse Quantum Dots ◽  
Redox Mediators ◽  
Cdse Qds ◽  
Electron Shuttles ◽  
Hydrogenase Enzyme

A series of viologen related redox mediators of varying reduction potential has been characterized and their utility as electron shuttles between CdSe quantum dots and hydrogenase enzyme has been demonstrated.

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