Photoactivated CdSe Nanocrystals as Nanosensors for Gases

Nano Letters ◽  
2003 ◽  
Vol 3 (6) ◽  
pp. 819-822 ◽  
Author(s):  
Amjad Y. Nazzal ◽  
Lianhua Qu ◽  
Xiaogang Peng ◽  
Min Xiao
Keyword(s):  
Cdse Nanocrystals

Impact of the stacking fault and surface defects states of colloidal CdSe nanocrystals on the removal of reactive black 5

2021 ◽  
Vol 265 ◽  
pp. 115029
Author(s):  
Naim Bel Haj Mohamed ◽  
Mohamed Bouzidi ◽  
Nassim Ben brahim ◽  
Lotfi Sellaoui ◽  
Mohamed Haouari ◽  
...  
Keyword(s):  
Surface Defects ◽  
Stacking Fault ◽  
Cdse Nanocrystals ◽  
Reactive Black 5

scholarly journals Colloidal CdSe nanocrystals are inherently defective

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tamar Goldzak ◽  
Alexandra R. McIsaac ◽  
Troy Van Voorhis
Keyword(s):  
Charge Transfer ◽  
Energy Spectrum ◽  
Surface Structure ◽  
Short Range ◽  
Surface Defects ◽  
Low Energy ◽  
Lewis Base ◽  
Cdse Nanocrystals ◽  
Photoinduced Charge Transfer ◽  
Photoinduced Charge

AbstractColloidal CdSe nanocrystals (NCs) have shown promise in applications ranging from LED displays to medical imaging. Their unique photophysics depend sensitively on the presence or absence of surface defects. Using simulations, we show that CdSe NCs are inherently defective; even for stoichiometric NCs with perfect ligand passivation and no vacancies or defects, we still observe that the low energy spectrum is dominated by dark, surface-associated excitations, which are more numerous in larger NCs. Surface structure analysis shows that the majority of these states involve holes that are localized on two-coordinate Se atoms. As chalcogenide atoms are not passivated by any Lewis base ligand, varying the ligand should not dramatically change the number of dark states, which we confirm by simulating three passivation schemes. Our results have significant implications for understanding CdSe NC photophysics, and suggest that photochemistry and short-range photoinduced charge transfer should be much more facile than previously anticipated.

Energy Transport in CdSe Nanocrystals Assembled with Molecular Wires

2003 ◽  
Vol 107 (2) ◽  
pp. 435-442 ◽  
Author(s):  
Artjay Javier ◽  
C. Steven Yun ◽  
Joseph Sorena ◽  
Geoffrey F. Strouse
Keyword(s):  
Energy Transport ◽  
Molecular Wires ◽  
Cdse Nanocrystals

Electrochemical Evaluation of Dopant Energetics and the Modulation of Ultrafast Carrier Dynamics in Cu-Doped CdSe Nanocrystals

2017 ◽  
Vol 121 (48) ◽  
pp. 27233-27240 ◽  
Author(s):  
Sourav Maiti ◽  
Jayanta Dana ◽  
Yogesh Jadhav ◽  
Tushar Debnath ◽  
Santosh K. Haram ◽  
...  
Keyword(s):  
Carrier Dynamics ◽  
Cdse Nanocrystals ◽  
Ultrafast Carrier Dynamics ◽  
Ultrafast Carrier ◽  
Electrochemical Evaluation

Temperature dependence of photoluminescence from CdSe nanocrystals embedded in silica matrix

2009 ◽  
Vol 129 (10) ◽  
pp. 1235-1238 ◽  
Author(s):  
A. Chahboun ◽  
S. Levichev ◽  
A.G. Rolo ◽  
O. Conde ◽  
M.J.M. Gomes
Keyword(s):  
Temperature Dependence ◽  
Silica Matrix ◽  
Cdse Nanocrystals

Uncooled photodetectors based on CdSe nanocrystals with an interdigital metallization

2014 ◽  
Vol 104 (5) ◽  
pp. 051124 ◽  
Author(s):  
A. I. Nusir ◽  
J. Aguilar ◽  
Z. Bever ◽  
M. O. Manasreh
Keyword(s):  
Cdse Nanocrystals

scholarly journals Imaging the charge transport in arrays of CdSe nanocrystals

2003 ◽  
Vol 83 (19) ◽  
pp. 4008-4010 ◽  
Author(s):  
M. Drndić ◽  
R. Markov ◽  
M. V. Jarosz ◽  
M. G. Bawendi ◽  
M. A. Kastner ◽  
...  
Keyword(s):  
Charge Transport ◽  
Cdse Nanocrystals

Electroluminescence and cathodoluminescence from inorganic CdSe nanocrystals embedded in thin films

1998 ◽  
Author(s):  
Hedi M. Mattoussi ◽  
J. Rodriguez-Viejo ◽  
Klavs F. Jensen ◽  
Moungi G. Bawendi ◽  
Michael F. Rubner
Keyword(s):  
Thin Films ◽  
Cdse Nanocrystals

Electrophoretic Deposition of CdSe Nanocrystals for Photovoltaic Applications

2007 ◽  
Vol 1031 ◽  
Author(s):  
Nathanael Smith ◽  
Kevin J Emmett ◽  
Sandra J Rosenthal
Keyword(s):  
Titanium Dioxide ◽  
Electrophoretic Deposition ◽  
Room Temperature ◽  
Tio2 Thin Film ◽  
Cdse Nanocrystals ◽  
Photovoltaic Devices ◽  
Photovoltaic Applications ◽  
Nanocrystalline Titanium ◽  
Alternative Techniques

AbstractCdSe nanocrystals chemically linked to nanocrystalline titanium dioxide substrates form a promising material for nanostructured photovoltaic devices. The usual method for attaching the nanocrystals to the titanium dioxide substrate is by means of a linking molecule (such as mercaptopropionic acid) or in-situ growth. In this paper, we report the use of an alternative technique, electrophoretic deposition (EPD), to directly deposit already formed CdSe nanocrystals onto the substrate. In EPD, a voltage is established between two electrodes that are immersed in a solution of nanocrystals. At room temperature, a fraction of the nanocrystals are thermally charged, and these charged nanocrystals migrate to the electrodes and adhere to the surface. A significant advantage of EPD over the use of linking molecules is the speed with which the nanocrystals are deposited: EPD takes only a few minutes, compared to the several hours required for the alternative techniques. Additionally, we have fabricated initial photovoltaic devices based on electrophoretically deposited CdSe nanocrystals on a planar TiO2 thin film.

Preparation and characterization of CdSe nanocrystals via Na2SO3-assisted photochemical route

2003 ◽  
Vol 103 (2) ◽  
pp. 202-206 ◽  
Author(s):  
Yu-lin Yan ◽  
Yi Li ◽  
Xue-feng Qian ◽  
Jie Yin ◽  
Zi-kang Zhu
Keyword(s):  
Cdse Nanocrystals ◽  
Photochemical Route
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