TITLE

Analysis of strain fields in silicon nanocrystals

AUTHOR(S)
Yılmaz, Dündar E.; Bulutay, Ceyhun; Çağın, Tahir
PUB. DATE
May 2009
SOURCE
Applied Physics Letters;5/11/2009, Vol. 94 Issue 19, p191914
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Strain has a crucial effect on the optical and electronic properties of nanostructures. We calculate the atomistic strain distribution in silicon nanocrystals up to a diameter of 3.2 nm embedded in an amorphous silicon dioxide matrix. A seemingly conflicting picture arises when the strain field is expressed in terms of bond lengths versus volumetric strain. The strain profile in either case shows uniform behavior in the core, however, it becomes nonuniform within 2–3 Å distance to the nanocrystal surface: tensile for bond lengths whereas compressive for volumetric strain. We reconcile their coexistence by an atomistic strain analysis.
ACCESSION #
39785802

 

Related Articles

  • Combustion Formation of Novel Nanomaterials: Synthesis and Cathodoluminescence of Silicon Carbide Nanowires. Savchyn, V.; Karbovnyk, I.; Popov, A. I.; Huczko, A. // Acta Physica Polonica, A.;Dec2009 Supplement, Vol. 116, pS.142 

    This paper presents the combustion synthesis and characterization of one-dimensional silicon carbide nanostructures (nanowires of 3C-SiC polytype with zincblend structure) by means of cathodoluminescence technique. Cathodoluminescence spectra of nano-SiC samples and, as a reference, of a...

  • Regional DFT—Electronic Stress Tensor Study of Aluminum Nanostructures for Hydrogen Storage. Szarek, Paweł; Hirai, Kosuke; Ichikawa, Kazuhide; Henry, David J.; Yarovsky, Irene; Tachibana, Akitomo // AIP Conference Proceedings;3/9/2009, Vol. 1102 Issue 1, p299 

    Nowadays, when technology has already been moved to the area of nano-devices, the description of properties at very microscopic level, within molecules, concerning interatomic interactions, had gained remarkable importance. Since these properties come to affect functionality and reliability of...

  • Synthesis of Nanocrystalline WC Single-Phase Refractory via Mechanical Milling. Razavi, Mansour; Rahimipour, Mohammad Reza; Yazdani-Rad, Rahim // Journal of Nanomaterials;2011, p1 

    In this paper the possibility of production of nanocrystalline WC single-phase by mechanical milling has been investigated. The raw materials containing tungsten and carbon with WC as nucleation were milled in a planetary ball mill and sampled in different times. Studies showed that after 75...

  • Electrostatically actuated silicon-based nanomechanical switch at room temperature. Guerra, Diego N.; Imboden, Matthias; Mohanty, Pritiraj // Applied Physics Letters;7/21/2008, Vol. 93 Issue 3, p033515 

    We demonstrate a silicon-based high-frequency nanomechanical device capable of switching controllably between two states at room temperature. The device uses a nanomechanical resonator with two distinct states in the hysteretic nonlinear regime. In contrast to prior work, we demonstrate...

  • Nano-regime Length Scales Extracted from the First Sharp Diffraction Peak in Non-crystalline SiO2 and Related Materials: Device Applications. Lucovsky, Gerald; Phillips, James C. // Nanoscale Research Letters;Mar2010, Vol. 5 Issue 3, p550 

    This paper distinguishes between two different scales of medium range order, MRO, in non-crystalline SiO2: (1) the first is ~0.4 to 0.5 nm and is obtained from the position of the first sharp diffraction peak, FSDP, in the X-ray diffraction structure factor, S( Q), and (2) the second is ~1 nm...

  • Size-dependent Fano Interaction in the Laser-etched Silicon Nanostructures. Kumar, Rajesh; Shukla, A. K.; Mavi, H. S.; Vankar, V. D. // Nanoscale Research Letters;Mar2008, Vol. 3 Issue 3, p105 

    Photo-excitation and size-dependent Raman scattering studies on the silicon (Si) nanostructures (NSs) prepared by laser-induced etching are presented here. Asymmetric and red-shifted Raman line-shapes are observed due to photo-excited Fano interaction in the quantum confined nanoparticles. The...

  • Enhancement in optical absorption of silicon fibrous nanostructure produced using femtosecond laser ablation. Mahmood, Abdul Salam; Sivakumar, M.; Venkatakrishnan, Krishnan; Bo Tan // Applied Physics Letters;7/20/2009, Vol. 95 Issue 3, p034107 

    Fibrous nanostructures are proposed for the application of solar cell. Irradiation of silicon surface with a few hundred femtosecond laser pulses of fluence 13 kJ/m2 at 13 MHz pulse frequency in air atmosphere results in the formation of fibrous nanostructure layer on the treated surface that...

  • Origin and removal of stacking faults in Ge islands nucleated on Si within nanoscale openings in SiO2. Leonhardt, Darin; Ghosh, Swapnadip; Han, Sang M. // Journal of Applied Physics;Oct2011, Vol. 110 Issue 7, p073516 

    We have previously reported that Ge films formed after nucleation of Ge islands within nanometer size openings in SiO2 and their subsequent coalescence over the SiO2 template exhibit threading dislocation densities below 106 cm-2. However, these films contain a density of twin/stacking fault...

  • Surface roughness influence on parametric amplification of nanoresonators in presence of thermomechanical and environmental noise. Palasantzas, G. // Journal of Applied Physics;Aug2008, Vol. 104 Issue 4, p046104 

    We investigate the surface roughness influence on the gain from parametric amplification in nanoresonators in the presence of thermomechanical and momentum exchange noise. The roughness is characterized by the rms amplitude w, the correlation length ξ, and the roughness exponent 0

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics