scholarly journals Strong Quantum Confinement Effect in the Optical Properties of Ultrathin α-In2Se3

2016 ◽  
Vol 4 (12) ◽  
pp. 1939-1943 ◽  
Author(s):  
Jorge Quereda ◽  
Robert Biele ◽  
Gabino Rubio-Bollinger ◽  
Nicolás Agraït ◽  
Roberto D'Agosta ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect

scholarly journals Tailoring Blue-Green Double Emissions in Carbon Quantum Dots via Co-Doping Engineering by Competition Mechanism between Chlorine-Related States and Conjugated π-Domains

Nanomaterials ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 635 ◽  
Author(s):  
Xue Sun ◽  
Huilian Liu ◽  
Lili Yang ◽  
Xinying Wang ◽  
Weiqiang Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Reaction Time ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Carbon Quantum Dots ◽  
Confinement Effect ◽  
Co Doping ◽  
Photoelectric Properties ◽  
Co Doped

Representing single-layer to tens of layers of graphene in a size less than 30 nm, carbon quantum dots (CQDs) is becoming an advanced multifunctional material for its unique optical, electronic, spin and photoelectric properties induced by the quantum confinement effect and edge effect. In present work, upon co-doping engineering, nitrogen and chlorine co-doped CQDs with uniquely strong blue-green double emissions are developed via a facile and one-pot hydrothermal method. The crystalline and optical properties of CQDs have been well manipulated by tuning the mole ratio of nitrogen/chlorine and the reaction time. The characteristic green emission centered at 512 nm has been verified, originating from the chlorine-related states, the other blue emissions centered at 460 nm are attributed to the conjugated π-domain. Increasing the proportion of 1,2,4-benzentriamine dihydrochloride can effectively adjust the bandgap of CQDs, mainly caused by the synergy and competition of chlorine-related states and the conjugated π-domain. Prolonging the reaction time promotes more nitrogen and chlorine dopants incorporate into CQDs, which inhibits the growth of CQDs to reduce the average size of CQDs down to 1.5 nm, so that the quantum confinement effect dominates into play. This work not only provides a candidate with excellent optical properties for heteroatoms-doped carbon materials but also benefits to stimulate the intensive studies for co-doped carbon with chlorine as one of new dopants paradigm.

Properties of Nanostructure Formed on SiO2/Si Interface by Laser Radiation

2007 ◽  
Vol 131-133 ◽  
pp. 559-562 ◽  
Author(s):  
Arthur Medvid ◽  
Igor Dmitruk ◽  
Pavels Onufrijevs ◽  
Iryna Pundyk
Keyword(s):  
Optical Properties ◽  
Laser Radiation ◽  
Band Gap ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect ◽  
Visible Range ◽  
Pulsed Nd:Yag Laser ◽  
Self Organized ◽  
Graded Band Gap

The aim of this work is to study optical properties of Si nanohills formed on the SiO2/Si interface by the pulsed Nd:YAG laser radiation. Nanohills which are self-organized on the surface of Si, are characterized by strong photoluminescence in the visible range of spectra with long wing in the red part of spectra. This peculiarity is explained by Quantum confinement effect in nanohillsnanowires with graded diameter. We have found a new method for graded band gap semiconductor formation using an elementary semiconductor. Graded change of band gap arises due to Quantum confinement effect.

The role of surface vibrations and quantum confinement effect to the optical properties of very thin nanocrystalline silicon films

2007 ◽  
Vol 102 (8) ◽  
pp. 083534 ◽  
Author(s):  
Emmanouil Lioudakis ◽  
Antreas Antoniou ◽  
Andreas Othonos ◽  
Constantinos Christofides ◽  
A. G. Nassiopoulou ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Nanocrystalline Silicon ◽  
Silicon Films ◽  
Confinement Effect ◽  
Surface Vibrations ◽  
Nanocrystalline Silicon Films

Vertical Quantum Confinement Effect on Optical Properties of Strain-Induced Quantum Dots Self-Formed in GaP/InP Short-Period Superlattices

1998 ◽  
Vol 37 (Part 1, No. 3B) ◽  
pp. 1540-1547 ◽  
Author(s):  
Seong-Jin Kim ◽  
Hajime Asahi ◽  
Kumiko Asami ◽  
Minori Takemoto ◽  
Mayuko Fudeta ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect ◽  
Short Period ◽  
Short Period Superlattices

Synthesis of GaAs nanowires with very small diameters and their optical properties with the radial quantum-confinement effect

2009 ◽  
Vol 95 (12) ◽  
pp. 123104 ◽  
Author(s):  
Guoqiang Zhang ◽  
Kouta Tateno ◽  
Haruki Sanada ◽  
Takehiko Tawara ◽  
Hideki Gotoh ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect ◽  
Gaas Nanowires

scholarly journals Quantum confinement effect on electronic and optical properties of SnS

2014 ◽  
Vol 63 (6) ◽  
pp. 067101
Author(s):  
Wu Qiong ◽  
Liu Jun ◽  
Dong Qian-Min ◽  
Liu Yang ◽  
Liang Pei ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Confinement Effect ◽  
Electronic And Optical Properties

Tunable Quantum Confinement Effect on Non-volatile Thin Film Polymer Memory Device

2008 ◽  
Author(s):  
Augustin J. Hong ◽  
Kang L. Wang ◽  
Wei Lek Kwan ◽  
Yang Yang ◽  
Dayanara Parra ◽  
...  
Keyword(s):  
Thin Film ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Memory Device ◽  
Confinement Effect ◽  
Film Polymer ◽  
Polymer Memory
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