Self-organization of silica nano-particles induced by the ion beam

2011 ◽  
Vol 8 (9) ◽  
pp. 2858-2861 ◽  
Author(s):  
Stjepan Lugomer ◽  
Zsolt Zolnai ◽  
Attila L. Tóth ◽  
István Bársony
Keyword(s):  
Ion Beam ◽  
Nano Particles ◽  
Self Organization

Study of scalable IBS nanopatterning mechanisms for III-V semiconductors using in-situ surface characterization

2011 ◽  
Vol 1354 ◽  
Author(s):  
Jean Paul Allain ◽  
Osman El-Atwani ◽  
Alex Cimaroli ◽  
Daniel L. Rokusek ◽  
Sami Ortoleva ◽  
...  
Keyword(s):  
Surface Chemistry ◽  
Surface Characterization ◽  
Ion Irradiation ◽  
Ion Beam ◽  
Low Energy ◽  
Self Organization ◽  
Beam Parameter ◽  
Ion Beam Sputtering

ABSTRACTIon-beam sputtering (IBS) has been studied as a means for scalable, mask-less nanopatterning of surfaces. Patterning at the nanoscale has been achieved for numerous types of materials including: semiconductors, metals and insulators. Although much work has been focused on tailoring nanopatterning by systematic ion-beam parameter manipulation, limited work has addressed elucidating on the underlying mechanisms for self-organization of multi-component surfaces. In particular there has been little attention to correlate the surface chemistry variation during ion irradiation with the evolution of surface morphology and nanoscale self-organization. Moreover the role of surface impurities on patterning is not well known and characterization during the time-scale of modification remains challenging. This work summarizes an in-situ approach to characterize the evolution of surface chemistry during irradiation and its correlation to surface nanopatterning for a variety of multi-components surfaces. The work highlights the importance and role of surface impurities in nanopatterning of a surface during low-energy ion irradiation. In particular, it shows the importance of irradiation-driven mechanisms in GaSb(100) nanopatterning by low-energy ions and how the study of these systems can be impacted by oxide formation.

Liquid Crystal Nanoparticles- LCNANOP: A SONSII Collaborative Research Project

2008 ◽  
Vol 1134 ◽  
Author(s):  
John William Goodby ◽  
Martin Bates ◽  
Isabel Saez ◽  
Ewa Gorecka ◽  
Heinz Kitzerow ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Collaborative Research ◽  
Chemical Properties ◽  
Hierarchical Structures ◽  
The Self ◽  
Nano Particles ◽  
Self Organization ◽  
Nano Particle ◽  
Research Project

AbstractLC-NANOP is an ESF EUROCORES SONS Collaborative Research Project that is addressing an innovative approach to self-organized nanostructures by combination of a variety of organic, inorganic and metal scaffolds with the unique self-organization properties of liquid crystals to obtain liquid crystal nano-particles. LC-NANOP is concerned with the synthesis, analysis, characterization, modeling and physico-chemical properties of super- and supra-molecular systems which are formed from a nano-particle as a central scaffold, surrounded by a layer of liquid crystal. The self-organization properties of the liquid crystal coating is the driving force leading to the self-assembly of the nano-particles into secondary or tertiary hierarchical structures, with emphasis on the systematic variation of nano-particle size, chirality, shape and functionality. This bottom-up approach to nano-structuring is very powerful as it combines the extraordinary variety of morphologies that liquid crystals present with the combination of functional entities, relevant for chemical, biological, optoelectronic, and photonic tasks, etc, to create ordered nano-structures that can be controlled by external stimuli.

Self-Organization Processes of Nanostructure Formation by Laser Radiation in Metal

2011 ◽  
Vol 222 ◽  
pp. 18-23 ◽  
Author(s):  
L. Fedorenko
Keyword(s):  
Plasmon Resonance ◽  
Active Zone ◽  
Rarefied Gas ◽  
High Energy ◽  
Nano Particles ◽  
Self Organization ◽  
Self Organized ◽  
Current State ◽  
Internal Parameters ◽  
Metal Nano Particles

The current state of knowledge about mechanisms of metal nano-particles (NP) formation processes induced by the interaction of high-energy laser beam with surface of the metallic lattices (Au, Ag, Cu) is presented. The review includes an evaluation of the contribution of self-organized effects into the processes of the metal nano-structurization depending on the laser mode, external factors and internal parameters of an active zone. It was noticed that intensive pulsed laser illumination enabled to stimulate nano-fragmentation at the fluencies near and above the melting threshold of the metal in different mediums The laser induced processes of metallic particles formation by ablation of the metal target with consequent NP sizes stabilization by precise temperature tuning in the active zone, local plasmon resonance in liquids, and microablation mechanism in metal films in the conditions of surface plasmon resonance (SPR) due to self-organization effects are considered. Comparative analysis of the laser nano-technologies in air, vacuum, rarefied gas and liquid environments showed the advantages of self-organization in NP generation processes based on the SPR effects and their perspectives.

Modification of Carbon Related Films with Energy Beams

2000 ◽  
Vol 647 ◽  
Author(s):  
Hiroshi Naramoto ◽  
Yonghua Xu ◽  
Kazumasa Narumi ◽  
Xiaodong Zhu ◽  
Jiri Vacik ◽  
...  
Keyword(s):  
Laser Energy ◽  
Ion Beam ◽  
Carbon Films ◽  
Fine Tuning ◽  
Nano Particles ◽  
Raman Spectrometry ◽  
Laser Illumination ◽  
Energy Beam ◽  
Thin Carbon ◽  
Annealing Study

AbstractWe report on typical examples of thin carbon films prepared employing energy beam techniques such as ion beam deposition, ion beam assisted deposition and Laser illumination. In an annealing study of ion beam deposited carbon films, small dots with sub-micron size are isolated through the selective oxidation of sp3-bonded amorphous carbon films, and they were confirmed to be diamond nano-particles by micro-Raman spectrometry. C60 deposition assisted with Ne ion beam results in two kinds of films: 1) The quality of C60 films is improved by the assist of 500eV Ne ion bombardment. 2) The increase of Ne ion Energy results in the decomposition of C60 and the films obtained at 700°C contain possible nano-diamond crystallites at the center of the intense beam spot. The Laser illumination decomposes C60 molecules in general, but the fine-tuning of Laser energy density makes it possible to prepare an array of high luminescent spots.

scholarly journals Ion Synthesis: Si-Ge Quantum Dots

2018 ◽  
Vol 52 (5) ◽  
pp. 516
Author(s):  
N.N. Gerasimenko ◽  
N.S. Balakleyskiy ◽  
A.D. Volokhovskiy ◽  
D.I. Smirnov ◽  
O.A. Zaporozhan
Keyword(s):  
Quantum Dots ◽  
High Temperature ◽  
Temperature Region ◽  
Ion Beam ◽  
Self Organization ◽  
High Temperature Annealing ◽  
Ion Energies ◽  
Ion Beam Implantation ◽  
Ge Quantum Dots

AbstractWe present a method of Si–Ge QDs formation by ion beam implantation (IBI) technique and high temperature annealing for self-organization. Implantation doses varied from 10^14 to 10^17 cm^–2, ion energies ranged from 50 to 150 keV, annealing proceeded at temperature of 950 to 1050°C in argon environment. Formed QDs show strong infrared (IR) photoluminescence (PL) in the temperature region 15–250 K.

scholarly journals Spontaneous Pattern Formation from Focused and Unfocused Ion Beam Irradiation

2001 ◽  
Vol 696 ◽  
Author(s):  
Alexandre Cuenat ◽  
Michael J. Aziz
Keyword(s):  
Small Amplitude ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Ion Beams ◽  
The Self ◽  
Self Organization ◽  
Lateral Boundary ◽  
Beam Irradiation ◽  
Ion Beam Irradiation ◽  
Lateral Boundary Conditions

AbstractWe study the formation and self-organization of “ripples” and “dots” spontaneously appearing during uniform irradiation of Si, Ge, and GaSb with energetic ion beams. Features have been produced both with sub-keV unfocused Ar+ ions and with a 30 keV Ga+ Focused Ion Beam. We follow the evolution of features from small amplitude to “nanospikes” with increasing ion dose. It appears that the edge of the sputtered region influences the patterns formed, an effect that may make it possible to guide the self-organization by the imposition of lateral boundary conditions on the sputter instability.

Ion-beam-directed self-organization of conducting nanowire arrays

2001 ◽  
Vol 63 (23) ◽  
Author(s):  
M. Batzill ◽  
F. Bardou ◽  
K. J. Snowdon
Keyword(s):  
Ion Beam ◽  
Nanowire Arrays ◽  
Self Organization
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