Thin Amorphous TiO2 Shell on CdSe Nanocrystal Quantum Dots Enhances Photocatalysis of Hydrogen Evolution from Water

2014 ◽  
Vol 118 (41) ◽  
pp. 23627-23634 ◽  
Author(s):  
Sooho Lee ◽  
Kangha Lee ◽  
Whi Dong Kim ◽  
Seokwon Lee ◽  
Do Joong Shin ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrogen Evolution ◽  
Nanocrystal Quantum Dots ◽  
Amorphous Tio2 ◽  
Tio2 Shell

Optical and Electrical Properties of CdTe Nanocrystal Quantum Dots Passivated in Amorphous TiO2 Thin Film Matrix

1998 ◽  
Vol 536 ◽  
Author(s):  
A. C. Rastogi ◽  
S. N. Sharma ◽  
Sandeep Kohli
Keyword(s):  
Thin Film ◽  
Quantum Dots ◽  
Volume Fraction ◽  
Electrical Coupling ◽  
Theoretical Models ◽  
Nanocrystal Size ◽  
Quantum Size ◽  
Cdte Nanocrystal ◽  
Nanocrystal Quantum Dots ◽  
Amorphous Tio2

AbstractCdTe nanocrystal quantum dots sequestered in TiO2 thin film matrix have been synthesized by r.f. sputtering from a composite CdTe/TiO2 target. CdTe nanocrystal formation is nucleation controlled as their size (11-25 nm), dispersion and volume fraction (0.065-0.2) increases with film thickness, substrate temperature (100°C) and thermal treatment. The optical band gap derived from the onset of absorption coefficient showed blue shifts concurrent with the CdTe nanocrystal size reduction due to quantum size effects. These shifts, not consistent with theoretical models based on strong or weak confinement regimes, are explained on the basis of anisotropic growth and formation of CdTe nanocrystal clusters. TiO2, in addition to being an ideal passivator and providing a barrier for carrier confinement to observe quantum effects, shows O2 vacancy dependent conductivity modulation. Electrical conductivity variation with CdTe nanocrystal size and density is attributed to electrical coupling and tunneling behavior of carriers between CdTe nanocrystallites.

scholarly journals Hydrogen Evolution Reaction: Photoinduced Electrocatalysis on 3D Flexible OsO x Quantum Dots (Adv. Energy Mater. 18/2021)

2021 ◽  
Vol 11 (18) ◽  
pp. 2170071
Author(s):  
Yuncheng Du ◽  
Yurui Xue ◽  
Chao Zhang ◽  
Yuxin Liu ◽  
Yan Fang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Energy Mater

Insights into Reversible Dissolution of Colloidal CdSe Nanocrystal Quantum Dots

2010 ◽  
Vol 22 (21) ◽  
pp. 5973-5982 ◽  
Author(s):  
Jacqueline T. Siy ◽  
Michael H. Bartl
Keyword(s):  
Quantum Dots ◽  
Nanocrystal Quantum Dots

The Growth of Colloidal Cadmium Telluride Nanocrystal Quantum Dots in the Presence of Cd0Nanoparticles

2007 ◽  
Vol 111 (28) ◽  
pp. 10336-10341 ◽  
Author(s):  
Viki Kloper ◽  
Ruth Osovsky ◽  
Joanna Kolny-Olesiak ◽  
Aldona Sashchiuk ◽  
Efrat Lifshitz
Keyword(s):  
Quantum Dots ◽  
Cadmium Telluride ◽  
Nanocrystal Quantum Dots

scholarly journals Quantum Dots: Quantum Optical Signature of Plasmonically Coupled Nanocrystal Quantum Dots (Small 38/2015)

Small ◽  
2015 ◽  
Vol 11 (38) ◽  
pp. 5176-5176 ◽  
Author(s):  
Feng Wang ◽  
Niladri S. Karan ◽  
Hue Minh Nguyen ◽  
Benjamin D. Mangum ◽  
Yagnaseni Ghosh ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Signature ◽  
Nanocrystal Quantum Dots ◽  
Quantum Optical
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