Investigation of the Role of Stress Gradient in the Pad for Silicon Nanowire Growth by Using Raman Spectroscopy

2010 ◽  
Vol 57 (1) ◽  
pp. 92-96
Author(s):  
Youngsik Song ◽  
Jaewu Choi
Keyword(s):  
Raman Spectroscopy ◽  
Silicon Nanowire ◽  
Stress Gradient ◽  
Nanowire Growth

ROLE OF TITANIUM CAPPING LAYER IN AMORPHOUS SILICON NANOWIRE GROWTH BY SOLID-STATE REACTION

NANO ◽  
2006 ◽  
Vol 01 (02) ◽  
pp. 159-165 ◽  
Author(s):  
YOUNGSIK SONG ◽  
JAEWU CHOI
Keyword(s):  
Electron Microscopy ◽  
Solid State ◽  
Amorphous Silicon ◽  
Silicon Nanowires ◽  
Solid State Reaction ◽  
Silicon Nanowire ◽  
Nickel Film ◽  
Nanowire Growth ◽  
Capping Layer

Role of titanium capping layer in synthesis of amorphous silicon nanowires by solid-state reaction was studied by Raman spectroscopy, energy dispersive spectroscopy, scanning electron microscopy and transmission electron microscopy. Silicon nanowires were not grown from 20nm thick nickel film on silicon (100) but grown from 20nm thick nickel film on silicon (100) with 100 nm thick titanium capping layer. The study shows that titanium capping layer plays an important role in formation of Ni–Ti–Si ternary alloy, which acts as a nucleation seed and a promoter for silicon nanowire growth.

Exploring the Biological Protective Role of Carotenoids by Raman Spectroscopy: Mechanical Stress of Cells

2019 ◽  
Vol 64 (1-2) ◽  
pp. 75-82
Author(s):  
F. Nekvapil ◽  
◽  
Cs. Müller Molnár ◽  
S. Tomšić ◽  
S. Cintă Pinzaru ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Mechanical Stress ◽  
Protective Role

scholarly journals Structural and Technological Approach to Reveal the Role of the Lipid Phase in the Formation of Soy Emulsion Gels with Chia Oil

Gels ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 48
Author(s):  
Ana M. Herrero ◽  
Claudia Ruiz-Capillas
Keyword(s):  
Raman Spectroscopy ◽  
Structural Properties ◽  
Structural Changes ◽  
Protein Secondary Structure ◽  
Lipid Phase ◽  
Α Helix ◽  
Β Sheet ◽  
Shed Light ◽  
Chia Oil

Considerable attention has been paid to emulsion gels (EGs) in recent years due to their interesting applications in food. The aim of this work is to shed light on the role played by chia oil in the technological and structural properties of EGs made from soy protein isolates (SPI) and alginate. Two systems were studied: oil-free SPI gels (SPI/G) and the corresponding SPI EGs (SPI/EG) that contain chia oil. The proximate composition, technological properties (syneresis, pH, color and texture) and structural properties using Raman spectroscopy were determined for SPI/G and SPI/EG. No noticeable (p > 0.05) syneresis was observed in either sample. The pH values were similar (p > 0.05) for SPI/G and SPI/EG, but their texture and color differed significantly depending on the presence of chia oil. SPI/EG featured significantly lower redness and more lightness and yellowness and exhibited greater puncture and gel strengths than SPI/G. Raman spectroscopy revealed significant changes in the protein secondary structure, i.e., higher (p < 0.05) α-helix and lower (p < 0.05) β-sheet, turn and unordered structures, after the incorporation of chia oil to form the corresponding SPI/EG. Apparently, there is a correlation between these structural changes and the textural modifications observed.

Unravelling transient phases during thermal oxidation of copper for dense CuO nanowire growth

CrystEngComm ◽  
2014 ◽  
Vol 16 (16) ◽  
pp. 3264-3267 ◽  
Author(s):  
Fei Wu ◽  
Yoon Myung ◽  
Parag Banerjee
Keyword(s):  
Raman Spectroscopy ◽  
Grain Boundaries ◽  
Thermal Oxidation ◽  
High Purity ◽  
Direct Evidence ◽  
Nanowire Growth ◽  
Cupric Ion ◽  
Cuo Nanowire ◽  
Transient Phases

Direct evidence of cupric ion outdiffusion through grain boundaries during thermal oxidation of high purity Cu is obtained using Raman spectroscopy.

Role of surrounding oxygen on oxide nanowire growth

2010 ◽  
Vol 97 (7) ◽  
pp. 073114 ◽  
Author(s):  
Annop Klamchuen ◽  
Takeshi Yanagida ◽  
Masaki Kanai ◽  
Kazuki Nagashima ◽  
Keisuke Oka ◽  
...  
Keyword(s):  
Nanowire Growth

On the Role of Surface Diffusion in Stress Relaxation During Electromigration

1995 ◽  
Vol 391 ◽  
Author(s):  
L.M. Klinger ◽  
L. Levin ◽  
E.E. Glickman
Keyword(s):  
Stress Relaxation ◽  
Surface Diffusion ◽  
Hydrostatic Stress ◽  
Stress Gradient ◽  
Film Surface ◽  
Diffusional Creep ◽  
Atomic Diffusion ◽  
Material Transport ◽  
Diffusional Flux

AbstractWe report on the role of surface diffusion involved in relaxation of electromigration (EM) induced compressive stresses in relation to hillock growth and EM behavior of interconnects. Two competing mechanisms of EM stress relaxation by material transport onto the surface are considered. The first is hillocking by threshold diffusional creep (TCH), with rather large blocks of material (grains or group of grains) involved in plastic flow. The second mechanism, atomic diffusion hillocking (ADH), is presumed to be a nonthreshold one, and represents atomic grain boundary (GB) diffusion stimulated by the hydrostatic stress gradient in the direction normal to the film surface. The latter process involves surface diffusion because GB diffusional flux onto the surface must be coupled with the flux of redistribution of the atoms over the surface. If ADH acts rapidly, this should prevent the build-up of the matter at the down-wind (anode) end of the stripe, and thus, eliminate the Blech EM threshold resulting from the stress-gradient along the stripe. The question as to whether GB diffusion capable of transporting atoms pushed by electron wind along the stripe is also effective in relieving compressive stress by GB migration of the surplus atoms in the normal direction, has remained open up to now. The problem is especially acute for short or/and narrow lines separated into short polycrystalline segments, where the Blech threshold effects are critical to EM reliability.We derived the main features of the EM behavior in drift velocity test geometry assuming that both TCH and ADH are operative. The result can be compared with available and future experimental observations in order to reveal if and when the ADH mechanism with surface diffusion involved works.

Sign in / Sign up

Export Citation Format

Share Document