Theoretical and Experimental Study of Bonding and Optical Properties of Self-Assembly Metallophthalocyanines Complexes on a Gold Surface. A Survey of the Substrate–Surface Interaction.

2011 ◽  
Vol 115 (47) ◽  
pp. 23512-23518 ◽  
Author(s):  
Ingrid Ponce ◽  
J. Francisco Silva ◽  
Ruben Oñate ◽  
Sebastian Miranda-Rojas ◽  
Alvaro Muñoz-Castro ◽  
...  
Keyword(s):  
Experimental Study ◽  
Optical Properties ◽  
Self Assembly ◽  
Substrate Surface ◽  
Gold Surface ◽  
Surface Interaction

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.

Self-Assembly Optical Components

2003 ◽  
Vol 771 ◽  
Author(s):  
Pavel I. Lazarev ◽  
Michael V. Paukshto ◽  
Elena N. Sidorenko
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Crystalline State ◽  
Liquid Crystalline ◽  
Film Deposition ◽  
X Ray Diffraction ◽  
Optical Components ◽  
Crystal Film ◽  
Solid Film ◽  
Thin Crystal

AbstractWe report a new method of Thin Crystal Film deposition. In the present paper we describe the method of crystallization, structure, and optical properties of Bisbenzimidazo[2,1-a:1',2',b']anthra[2,1,9-def:6,5,10-d'e'f']-diisoquinoline-6,9-dion (mixture with cis-isomer) (abbreviated DBI PTCA) sulfonation product. The Thin Crystal Film has a thickness of 200-1000 nm, with anisotropic optical properties such as refraction and absorption indices. X-ray diffraction data evidences a lyotropic liquid crystalline state in liquid phase and crystalline state in solid film. Anisotropic optical properties of the film make it useful in optical devices, e.g. liquid crystal displays.

scholarly journals Au(100) as a Template for Pentacene Monolayer

Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2393
Author(s):  
Artur Trembułowicz ◽  
Agata Sabik ◽  
Miłosz Grodzicki
Keyword(s):  
Self Assembly ◽  
Molecular Layer ◽  
High Vacuum ◽  
Gold Surface ◽  
Ultra High Vacuum ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Height Difference ◽  
Characteristic Features ◽  
Reconstructed Surface

The surface of quasi-hexagonal reconstructed Au(100) is used as the template for monolayer pentacene (PEN) self-assembly. The system is characterized by means of scanning tunneling microscopy at room temperature and under an ultra-high vacuum. A new modulated pattern of molecules with long molecular axes (MA) arranged along hex stripes is found. The characteristic features of the hex reconstruction are preserved herein. The assembly with MA across the hex rows leads to an unmodulated structure, where the molecular layer does not recreate the buckled hex phase. The presence of the molecules partly lifts the reconstruction—i.e., the gold hex phase is transformed into a (1×1) phase. The arrangement of PEN on the gold (1×1) structure is the same as that of the surrounding molecular domain on the reconstructed surface. The apparent height difference between phases allows for the distinction of the state of the underlying gold surface.

Self-Assembly Behavior and Optical Properties of Poly(3-thiopheneacetate)/Dialkyldimethylammonium Complexes

2009 ◽  
Vol 210 (18) ◽  
pp. 1510-1518 ◽  
Author(s):  
Young-Sik Yoon ◽  
Kwang-Han Park ◽  
Jong-Chan Lee
Keyword(s):  
Optical Properties ◽  
Self Assembly ◽  
Assembly Behavior

Anion induced modulation of self-assembly and optical properties in urea end-capped oligo(p-phenylenevinylene)s

2005 ◽  
pp. 593 ◽  
Author(s):  
Reji Varghese ◽  
Subi J. George ◽  
Ayyappanpillai Ajayaghosh
Keyword(s):  
Optical Properties ◽  
Self Assembly

scholarly journals Formation of Au-Silane Bonds

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Shira Yochelis ◽  
Eran Katzir ◽  
Yoav Kalcheim ◽  
Vitaly Gutkin ◽  
Oded Millo ◽  
...  
Keyword(s):  
Molecular Electronics ◽  
Self Assembly ◽  
Au Nanoparticles ◽  
Electrical Coupling ◽  
Gold Surface ◽  
Scanning Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Fundamental Study ◽  
Covalent Bonds ◽  
Anchoring Groups

Many intriguing aspects of molecular electronics are attributed to organic-inorganic interactions, yet charge transfer through such junctions still requires fundamental study. Recently, there is a growing interest in anchoring groups, which considered dominating the charge transport. With this respect, we choose to investigate self-assembly of disilane molecules sandwiched between gold surface and gold nanoparticles. These assemblies are found to exhibit covalent bonds not only between the anchoring Si groups and the gold surfaces but also in plane crosslinks that increase the monolayer stability. Finally, using scanning tunneling spectroscopy we demonstrate that the disilane molecules provide strong electrical coupling between the Au nanoparticles and a superconductor substrate.

scholarly journals A combined theoretical and experimental study of electronic structure and optical properties of β-ZnMoO4 microcrystals

Polyhedron ◽  
2013 ◽  
Vol 54 ◽  
pp. 13-25 ◽  
Author(s):  
L.S. Cavalcante ◽  
E. Moraes ◽  
M.A.P. Almeida ◽  
C.J. Dalmaschio ◽  
N.C. Batista ◽  
...  
Keyword(s):  
Experimental Study ◽  
Optical Properties ◽  
Electronic Structure

scholarly journals RAFT-photomediated PISA in dispersion: mechanism, optical properties and application in templated synthesis

2019 ◽  
Vol 10 (18) ◽  
pp. 2316-2326 ◽  
Author(s):  
Vitalii Tkachenko ◽  
Camélia Matei Ghimbeu ◽  
Cyril Vaulot ◽  
Loïc Vidal ◽  
Julien Poly ◽  
...  
Keyword(s):  
Optical Properties ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Templated Synthesis ◽  
Dispersion Mechanism

Diblock copolymer nanoparticles were prepared by photomediated polymerization-induced self-assembly (“photo-PISA”) in dispersion.

Sign in / Sign up

Export Citation Format

Share Document