Controlled self-assembly of semiconductor quantum dots using shadow masks

2003 ◽  
Vol 82 (24) ◽  
pp. 4349-4351 ◽  
Author(s):  
T. Schallenberg ◽  
T. Borzenko ◽  
G. Schmidt ◽  
M. Obert ◽  
G. Bacher ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Semiconductor Quantum Dots

scholarly journals EXPERIMENTAL STUDY OF 3D SELF-ASSEMBLED PHOTONIC CRYSTALS AND COLLOIDAL CORE-SHELL SEMICONDUCTOR QUANTUM DOTS

2017 ◽  
Vol 24 (1&2) ◽  
pp. 161-170
Author(s):  
Pham Thu Nga ◽  
Vu Duc Chinh ◽  
Nguyen Xuan Nghia ◽  
Nguyen Viet Huy ◽  
Dao Nguyen Thuan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Quantum Dots ◽  
Optical Properties ◽  
Photonic Crystal ◽  
Photonic Crystals ◽  
Self Assembly ◽  
Photonic Band Gap ◽  
Semiconductor Quantum Dots ◽  
Core Shell ◽  
Sphere Diameter

In this contribution we present an experimental study of 3D opal photonic crystals. The samples are opals constituted by colloidal silica spheres, realized with self-assembly technique. The sphere diameter is selected in order to obtain coupling of the photonic band gap with the emission from CdSe/ZnS colloidal quantum dots. The quantum dots infiltrated in the opals is expected to be enhanced or suppressed depending on the detection angle from the photonic crystal. The structural and optical characterization of the SiO2 opal photonic crystals are performed by field-emission scanning electron microscopy and reflectivity spectroscopy. Measurements performed on samples permits to put into evidence the influence of the different preparation methods on the optical properties. Study of self-activated luminescence of the pure opals is also presented. It is shown that the luminescence of the sample with QDs have original QD emission and not due to the photonic crystal structure. The optical properties of colloidal core-shell semiconductor quantum dots of CdSe/ZnS which are prepared in our lab will be mention.

Guided Self Assembly of InAs Quantum Dots on a Cleaved Facet

2006 ◽  
Vol 959 ◽  
Author(s):  
Emanuele Uccelli ◽  
Dieter Schuh ◽  
Jochen Bauer ◽  
Max Bichler ◽  
Jonathan J. Finley ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Atomic Force Microscopy ◽  
Growth Mechanism ◽  
Self Assembly ◽  
Semiconductor Quantum Dots ◽  
Preferential Growth ◽  
Inas Quantum Dots ◽  
Force Microscopy ◽  
Atomic Force ◽  
Long Range Ordering

ABSTRACTThe long range ordering of epitaxial semiconductor quantum dots (QDs) has been obtained by combing self assembly with the cleaved edge overgrowth technique. The introduction of nanometer thick AlAs stripes on a (110) oriented GaAs surface avoids the misfit dislocation growth mechanism of InAs on GaAs (110) and drives the formation of array of QDs. Atomic Force Microscopy (AFM) investigations highlight that InAs QDs only nucleate in chain like structure on Al-rich regions. Here, we present experimental results that demonstrate the ability to create ordered QDs lattices and discuss the conditions under which preferential growth of QDs on the AlAs stripes occurs.

Self-assembly of semiconductor quantum-dots on electrodes for photoelectrochemical biosensing

2007 ◽  
Vol 6 (4) ◽  
pp. 416 ◽  
Author(s):  
Ronit Freeman ◽  
Ron Gill ◽  
Moritz Beissenhirtz ◽  
Itamar Willner
Keyword(s):  
Quantum Dots ◽  
Self Assembly ◽  
Semiconductor Quantum Dots

BIOLOGICALLY-INSPIRED CHEMICALLY-DIRECTED SELF-ASSEMBLY OF SEMICONDUCTOR QUANTUM-DOT-BASED SYSTEMS: PHONON-HOLE SCATTERING IN DNA BOUND TO DNA-QUANTUM-DOT COMPLEXES

2006 ◽  
Vol 16 (02) ◽  
pp. 659-668 ◽  
Author(s):  
MICHAEL A. STROSCIO ◽  
MITRA DUTTA
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Self Assembly ◽  
Directed Assembly ◽  
Semiconductor Quantum Dots ◽  
Dna Molecules ◽  
Biologically Inspired ◽  
Absorption And Emission ◽  
Semiconductor Quantum Dot ◽  
Phonon Absorption

This paper focuses on: (a) the concept and use of chemically-directed assembly to integrate nanoscale quantum dots at densities above 1017 cm-3 with biomolecular interconnecting structures; and (b) the phenomena of phonon absorption and emission from holes propagating in DNA molecules that are bond on one terminus to semiconductor quantum dots.

Sign in / Sign up

Export Citation Format

Share Document