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

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.

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

Advanced Optical Materials ◽

10.1002/adom.201600365 ◽

2016 ◽

Vol 4 (12) ◽

pp. 1939-1943 ◽

Cited By ~ 40

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

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Augmented band gap tunability in indium-doped zinc sulfide nanocrystals

Nanoscale ◽

10.1039/c8nr08830f ◽

2019 ◽

Vol 11 (7) ◽

pp. 3154-3163 ◽

Cited By ~ 5

Author(s):

Enrico Della Gaspera ◽

Joseph Griggs ◽

Taimur Ahmed ◽

Sumeet Walia ◽

Edwin L. H. Mayes ◽

...

Keyword(s):

Band Gap ◽

Zinc Sulfide ◽

Quantum Confinement ◽

Quantum Confinement Effect ◽

Confinement Effect ◽

Indium Doping ◽

Zns Nanocrystals ◽

Sulfide Nanocrystals

Indium doping in ZnS nanocrystals heavily affects the band gap beyond quantum confinement effect with unprecedented tunability in the UVA/UVB range.

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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 ◽

10.3390/nano8090635 ◽

2018 ◽

Vol 8 (9) ◽

pp. 635 ◽

Cited By ~ 10

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.

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