Morphology of Self-Assembled InAs Quantum Dots on GaAs(001)

2001 ◽  
Vol 696 ◽  
Author(s):  
F. Arciprete ◽  
F. Patella ◽  
M. Fanfoni ◽  
S. Nufris ◽  
E. Placidi ◽  
...  
Keyword(s):  
Nucleation And Growth ◽  
The Self ◽  
Two Dimensional ◽  
Wetting Layer ◽  
Inas Quantum Dots ◽  
Initial Formation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Self Assembled

AbstractWe have followed by Atomic Force Microscopy (AFM) the epitaxial growth of InAs on GaAs(001) starting from the initial formation of a strained two-dimensional wetting layer up to the self-assembled nucleation and growth of 3D nanoparticles. In this work we underline many aspects of the morphology of this system, which substantiate the role either of kinetics on thermodynamics in the process of growth as well as the role of surface instabilities in controlling lateral ordering of the nanoaggregates.

Morphology of Self-Assembled InAs Quantum Dots on GaAs(001).

2001 ◽  
Vol 707 ◽  
Author(s):  
F. Arciprete ◽  
F. Patella ◽  
M. Fanfoni ◽  
S. Nufris ◽  
E. Placidi ◽  
...  
Keyword(s):  
Nucleation And Growth ◽  
The Self ◽  
Two Dimensional ◽  
Wetting Layer ◽  
Inas Quantum Dots ◽  
Initial Formation ◽  
Force Microscopy ◽  
Atomic Force ◽  
Self Assembled

ABSTRACTWe have followed by Atomic Force Microscopy (AFM) the epitaxial growth of InAs on GaAs(001) starting from the initial formation of a strained two-dimensional wetting layer up to the self-assembled nucleation and growth of 3D nanoparticles. In this work we underline many aspects of the morphology of this system, which substantiate the role either of kinetics on thermodynamics in the process of growth as well as the role of surface instabilities in controlling lateral ordering of the nanoaggregates.

Self-Assembled Lipid Tubules: Synthesis, Characterization, and Ordered Arrays

2006 ◽  
Vol 922 ◽  
Author(s):  
Yue Zhao ◽  
Nidhi Mahajan ◽  
Jiyu Fang
Keyword(s):  
Atomic Force Microscopy ◽  
Lipid Bilayer ◽  
Surface Patterning ◽  
The Self ◽  
Two Dimensional ◽  
Force Microscopy ◽  
Ordered Arrays ◽  
Atomic Force ◽  
Self Assembled ◽  
Lipid Tubules

AbstractThe rolling of lipid bilayer sheets into hollow cylindrical tubules have emerged as a group of interesting supramolecular nanostructures. Here, we image the self-assembled tubules of 1,2-bis(tricosa-10,12-diynoyl)-sn-glycero-3-phosphochloline (DC8,9PC) with atomic force microscopy. Nanoscale ripple structures with a periodicity of ~ 200nm in the cylindrical lipid tubules are observed. We develop two simple methods based on microfluidic networks and surface patterning to produce two dimensional ordered arrays of parallel aligned lipid tubules on substrates.

scholarly journals Immunoactivity of self-assembled antibodies investigated by atomic force microscopy

RSC Advances ◽  
2018 ◽  
Vol 8 (51) ◽  
pp. 29378-29384 ◽  
Author(s):  
Hiroaki Kominami ◽  
Kei Kobayashi ◽  
Shinichiro Ido ◽  
Hirokazu Kimiya ◽  
Hirofumi Yamada
Keyword(s):  
Atomic Force Microscopy ◽  
Self Assembly ◽  
The Self ◽  
Two Dimensional ◽  
Igg Antibodies ◽  
Association Rate Constant ◽  
Association Rate ◽  
Force Microscopy ◽  
Atomic Force ◽  
Self Assembled

We investigated self-assembly such as hexamerization and two-dimensional crystallization of immunoglobulin G (IgG) molecules on mica by atomic force microscopy. We also estimated the association rate constant of the self-assembled IgG antibodies.

Self-affine Fracture Surface Parameters and Their Relationship with Microstructure in a Cast Aluminum Alloy

2002 ◽  
Vol 17 (6) ◽  
pp. 1276-1282 ◽  
Author(s):  
M. Hinojosa ◽  
J. Aldaco
Keyword(s):  
Aluminum Alloy ◽  
Fracture Surface ◽  
The Self ◽  
Cast Aluminum Alloy ◽  
Cast Aluminum ◽  
Force Microscopy ◽  
Fracture Surfaces ◽  
Atomic Force ◽  
Roughness Exponent

The possible role of microstructural features in determining the self-affinity of the fracture surface of a cast aluminum alloy is explored in this work. Fracture surfaces generated both in tension and impact tests were topometrically analyzed by atomic force microscopy, scanning electron microscopy, and stylus profilometry. The roughness exponent exhibited the “universal” value ζ ≈ 0.78, and the correlation length ζ was of the order of the grain size. The brittle intermetallic compounds known to be important in crack initiation did not show any correlation with the self-affine parameters of the resulting fracture surfaces in this particular case.

NANOSTRUCTURES FROM DESIGNER PEPTIDES

COSMOS ◽  
2008 ◽  
Vol 04 (02) ◽  
pp. 173-183
Author(s):  
BOON TEE ONG ◽  
PARAYIL KUMARAN AJIKUMAR ◽  
SURESH VALIYAVEETTIL
Keyword(s):  
Atomic Force Microscopy ◽  
Solid State ◽  
Self Assembly ◽  
Size Range ◽  
The Self ◽  
Mica Surface ◽  
Force Microscopy ◽  
Solution Structures ◽  
Atomic Force

The present article reviews the self-assembly of oligopeptides to form nanostructures, both in solution and in solid state. The solution structures of the peptides were examined using circular dichroism and dynamic light scattering. The solid state assembly was examined by adsorbing the peptides onto a mica surface and analyzing it using atomic force microscopy. The role of pH and salt concentration on the peptide self-assembly was also examined. Nanostructures within a size range of 3–10 nm were obtained under different conditions.

Topographic characterization of the self-assembled nanostructures of chitosan on mica surface by atomic force microscopy

2015 ◽  
Vol 353 ◽  
pp. 757-763 ◽  
Author(s):  
Li Wang ◽  
Jiafeng Wu ◽  
Yan Guo ◽  
Coucong Gong ◽  
Yonghai Song
Keyword(s):  
Atomic Force Microscopy ◽  
The Self ◽  
Mica Surface ◽  
Force Microscopy ◽  
Atomic Force ◽  
Self Assembled

scholarly journals Preparation and ion sensing property of the self-assembled microgels by QCM

2017 ◽  
Vol 3 (1) ◽  
pp. 16-25 ◽  
Author(s):  
Zheng Cao ◽  
Yuyuan Chen ◽  
Qianpeng Zhang ◽  
Yanping Xia ◽  
Gang Liu ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Quartz Crystal ◽  
Linear Connection ◽  
The Self ◽  
Polystyrene Sulfonate ◽  
Force Microscopy ◽  
Ion Sensing ◽  
Atomic Force ◽  
Before And After ◽  
Self Assembled

AbstractThe polyanion polystyrene sulfonate (PSS), the polycation poly (allylamine hydrochloride) (PAH), and the anionic poly (N-isopropylacrylamide-co-acrylic acid) [P(NIPAM-co-AA)] microgels were self-assembled onto the polyethylene imine (PEI) adsorbed gold surfaces of quartz crystal microbalance (QCM) because of the electrostatic attractions. The interactions of various metal particles including Ca2+, Bi3+, Cu2+, Zn2+, Ni2+, Sn2+, Co2+, and Cd2+with the obtained PEI/PSS/PAH/microgel layer in aqueous solutions were evaluated by QCM. The PEI/PSS/PAH/Microgel covered QCM sensor demonstrates the lowest detection limit of 0.1 ppm in aqueous solutions and the obviously linear connection between the frequency response and Ni2+concentration from 0.1 to 20 ppm, which is due to the complexation of Ni2+with the carboxyl groups of microgels. Atomic force microscopy (AFM) was used to reveal the morphology and stability of the self-assembled polyelectrolyte/microgel layer before and after adsorbing heavy metal ions. These self-assembled materials of polyelectrolyte/microgel layer will be helpful for manufacturing ion-selective materials for separation and identification purposes.

scholarly journals GROWTH AND PROPERTIES OF STACKED SELF-ASSEMBLED In0.5Ga0.5As QUANTUM DOTS

2012 ◽  
Vol 2 (1) ◽  
pp. 1
Author(s):  
Didik Aryanto ◽  
Zulkafli Othaman ◽  
Abd. Khamim Ismail
Keyword(s):  
Quantum Dots ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
The Self ◽  
Organic Chemical ◽  
Force Microscopy ◽  
Atomic Force ◽  
Metal Organic ◽  
Self Assembled ◽  
Organic Chemical Vapor Deposition

Self-assembled In0.5Ga0.5As quantum dots (QDs) were grown using metal-organic chemical vapor deposition (MOCVD) on GaAs (100) substrate with different number of stacking QDs layers. Surface study using atomic force microscopy (AFM) shows that surface morphology of the self-assembled QDs change with different number of stacking QDs layers caused by the previous QDs layers and the thickness of the GaAs spacer layers. PL measurement shows variation in the PL spectra as a function of number of stacking layers of In0.5Ga0.5As QDs. The PL peak positions blue-shifted from 1225 nm to 1095 nm and dramatically increase in intensity with increasing number of stacking QDs layers.

Optical And Structural properties of Vertical Aligned Self-Assembled InAs Quantum Dots Multilayers

2001 ◽  
Vol 676 ◽  
Author(s):  
J. C. González ◽  
M. I. N. da Silva ◽  
W. N. Rodrigues ◽  
F. M. Matinaga ◽  
R. Magalhaes-Paniago ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Structural Properties ◽  
Molecular Beam ◽  
X Ray Diffraction ◽  
Inas Quantum Dots ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Self Assembled

ABSTRACTIn this work, we report optical and structural properties of vertical aligned self-assembled InAs quantum dots multilayers. The InAs quantum dots samples were grown by Molecular Beam Epitaxy. Employing Atomic Force Microscopy, Transmission Electron Microscopy, and Gracing Incident X-ray Diffraction we have studied the structural properties of samples with different number of periods of the multiplayer structure, as well as different InAs coverage. The optical properties were studied using Photoluminescence spectroscopy.

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