+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

SnO2 quantum dots and quantum wires: controllable synthesis, self-assembled 2D architectures, and gas-sensing properties

SnO2 quantum dots and quantum wires: controllable synthesis, self-assembled 2D architectures, and gas-sensing properties

Journal of the American Chemical Society 130(37): 12527-12535

SnO2 quantum dots (QDs) and ultrathin nanowires (NWs) with diameters of approximately 0.5-2.5 and approximately 1.5-4.5 nm, respectively, were controllably synthesized in a simple solution system. They are supposed to be ideal models for studying the continuous evolution of the quantum-confinement effect in SnO2 1D --> 0D systems. The observed transition from strong to weak quantum confinement in SnO2 QDs and ultrathin NWs is interpreted through the use of the Brus effective-mass approximation and the Nosaka finite-depth well model. Photoluminescence properties that were coinfluenced by size effects, defects (oxygen vacancies), and surface capping are discussed in detail. With the SnO2 QDs as building blocks, various 2D porous structures with ordered hexagonal, distorted hexagonal, and square patterns were prepared on silicon-wafer surfaces and exhibited optical features of 2D photonic crystals and enhanced gas sensitivity.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 055823902

Download citation: RISBibTeXText

PMID: 18715007

DOI: 10.1021/ja8040527

Related references

Synthesis and sensing properties of spherical flowerlike architectures assembled with SnO2 submicron rods. Sensors and Actuators B: Chemical 173: 643-651, 2012

Preparation and gas-sensing properties of SnO2/graphene quantum dots composites via solvothermal method. Journal of Materials Science 52(16): 9441-9451, 2017

SnO₂@CdS nanowire-quantum dots heterostructures: tailoring optical properties of SnO₂ for enhanced photodetection and photocatalysis. Nanoscale 5(7): 3022-3029, 2013

Eco-friendly synthesis of size-controllable amine-functionalized graphene quantum dots with antimycoplasma properties. Nanoscale 5(3): 1137-1142, 2013

The use of heat transfer fluids in the synthesis of high-quality CdSe quantum dots, core/shell quantum dots, and quantum rods. Nanotechnology 16(10): 2000-2011, 2005

Synthesis and gas sensing properties of ZnO quantum dots. Sensors and Actuators B: Chemical 146(1): 111-115, 2010

Controllable Synthesis and Optical Properties of ZnS:Mn 2+ /ZnS/ZnS:Cu 2+ /ZnS Core/Multishell Quantum Dots toward Efficient White Light Emission. Acs Applied Materials and Interfaces 9(11): 9833-9839, 2017

One-step ultrasonic synthesis of graphene quantum dots with high quantum yield and their application in sensing alkaline phosphatase. Chemical Communications 51(5): 948-951, 2015

Exciton luminescence in quantum dots and quantum wires of diluted magnetic semiconductors. Journal of Luminescence 87-89: 347-349, 2000

Polaron effects in one-dimensional lateral quantum wires and parabolic quantum dots. Physical Review. B, Condensed Matter 42(18): 11950-11952, 1990

Dirac electrons in graphene-based quantum wires and quantum dots. Journal of Physics. Condensed Matter 21(34): 344202, 2009

Charge transport through single molecules, quantum dots and quantum wires. Nanotechnology 21(27): 272001, 2010

Quantum-confinement-induced Gamma -->X transition in GaAs/AlGaAs quantum films, wires, and dots. Physical Review. B, Condensed Matter 52(20): 14664-14670, 1995

Confined bulklike longitudinal optical phonon modes in right triangular quantum dots and quantum wires. Journal of Physics. Condensed Matter 22(2): 025403, 2010

Glancing-angle diffraction anomalous fine structure of InAs quantum dots and quantum wires. Journal of Synchrotron Radiation 8(Pt 2): 536-538, 2001