Amorphization of Ge and Si nanocrystals embedded in amorphous SiO2 by ion irradiation

نویسندگان

  • M. Backman
  • F. Djurabekova
  • O. H. Pakarinen
  • K. Nordlund
  • L. L. Araujo
  • M. C. Ridgway
چکیده

M. Backman,1 F. Djurabekova,1,2,* O. H. Pakarinen,1 K. Nordlund,1 L. L. Araujo,3 and M. C. Ridgway3 1Helsinki Institute of Physics and Department of Physics, University of Helsinki, P.O. Box 43, Helsinki FI-00014, Finland 2Arifov Institute of Electronics, Durmon yuli 33, 100125 Tashkent, Uzbekistan 3Department of Electronic Materials Engineering, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, Australia Received 31 July 2009; revised manuscript received 18 September 2009; published 19 October 2009

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

In situ observation of shear-driven amorphization in silicon crystals.

Amorphous materials are used for both structural and functional applications. An amorphous solid usually forms under driven conditions such as melt quenching, irradiation, shock loading or severe mechanical deformation. Such extreme conditions impose significant challenges on the direct observation of the amorphization process. Various experimental techniques have been used to detect how the am...

متن کامل

Invited Review Paper STRUCTURAL AND OPTICAL PROPERTIES OF Si AND Ge NANOCRYSTALS EMBEDDED IN SiO2 MATRIX BY ION IMPLANTATION

It has been recently established that upon annealing at high temperatures impurity atoms implanted into SiO2 matrix precipitate and form crystal islands with nanometer size. These nanostructures are expected to have interesting electrical and optical properties which can be utilized in the production of new optoand micro-electronic devices. In this work, properties of Ge and Si nanocrystals for...

متن کامل

TEM study on the evolution of Ge nanocrystals in Si oxide matrix as a function of Ge concentration and the Si reduction process

Growth and evolution of germanium (Ge) nanocrystals embedded into a silicon oxide (SiO2) system have been studied based on the Ge content of co-sputtered Ge-SiO2 films using transmission electron microscopy (TEM) and Xray photoelectron spectroscopy (XPS). It was found that when the proportion of Ge relative to Ge oxide is 20%, TEM showed that annealing the samples at 800C for 60 min resulted in...

متن کامل

Luminescent Si Nanocrystals Synthesized by Si Ion Implantation and Reactive Pulsed Laser Deposition: The Effects of RTA, Excimer-UV and E-Beam Irradiation

Si ion implantation was widely used to synthesize specimens of SiO2 containing supersaturated Si and subsequent high temperature annealing induces the formation of embedded luminescent Si nanocrystals. In this work, the potentialities of excimer UV-light (172 nm, 7.2 eV) irradiation and rapid thermal annealing (RTA) to enhance the photoluminescence and to achieve low temperature formation of Si...

متن کامل

Local structure of Ge/Si nanostructures: Uniqueness of XAFS spectroscopy

A discussion of the limitations of Raman scattering as applied to Ge/Si nanostructures is followed by a summary of our recent efforts to investigate the local structure of various Ge nanostructures, namely, Ge quantum dots MBE grown on bare Si(1 0 0), on Si(1 1 1) with a 0.3 nm SiO2 coverage, and nanocrystals embedded in SiO2, by X-ray absorption fine structure spectroscopy. For the latter case...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2009