Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Pressure-induced structural phase transformations in silicon nanowires.

H K Poswal1, Nandini Garg, Surinder M Sharma

  • 1Synchrotron Radiation Section, Bhabha Atomic Research Centre, Mumbai 400085, India.

Journal of Nanoscience and Nanotechnology
|July 14, 2005
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

1T-Rich MoS<sub>2</sub> and Its Enhanced Hydrogen Evolution Reaction (HER) Activity by Functionalization With Organic Ammonium Cations.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same author

Thermal and pressure response of KHg(CN)<sub>2</sub>(SCN).

Physical chemistry chemical physics : PCCP·2025
Same author

Comparative study of alpha, beta, and omicron spike protein by computing the IR/Raman frequencies and UV-vis adsorption - A computational analysis through DFT.

Microbial pathogenesis·2024
Same author

Topochemically synthesized Nb<sub>3</sub>VS<sub>6</sub> as a stable anode for sodium-ion batteries.

Chemical communications (Cambridge, England)·2024
Same author

Rhombohedrally stacked layered transition metal dichalcogenides and their electrocatalytic applications.

Nanoscale·2024
Same author

Celebrating the 25th Anniversary of the Chemical Research Society in India.

Journal of the American Chemical Society·2024

Silicon nanowires undergo phase transitions under high pressure, mirroring bulk silicon behavior. Their pressure-dependent Raman spectra suggest intermediate properties between bulk and porous silicon.

Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Nanotechnology

Background:

  • Silicon is a foundational material in electronics.
  • Understanding silicon's behavior under extreme conditions is crucial for novel applications.
  • Nanowire structures offer unique properties compared to bulk materials.

Purpose of the Study:

  • To investigate the high-pressure structural transformations of silicon nanowires.
  • To compare the pressure-induced phase transitions in silicon nanowires with bulk silicon.
  • To explore potential size effects on the structural behavior of silicon nanowires.

Main Methods:

  • Angle dispersive X-ray diffraction measurements up to 22 GPa.
  • Raman spectroscopy to analyze pressure-dependent vibrational modes.

Related Experiment Videos

Main Results:

  • Silicon nanowires transform from cubic to beta-tin phase (7.5-10.5 GPa), then to Imma phase (~14 GPa), and primitive hexagonal structure (~16.2 GPa).
  • Upon pressure release, a transformation to the metastable R8 phase is observed.
  • The sequence of phase transitions is consistent with bulk silicon.
  • No significant size effect was detected via X-ray diffraction.
  • Raman mode pressure dependence indicates nanowire behavior intermediate between bulk and porous silicon.

Conclusions:

  • Silicon nanowires exhibit pressure-induced phase transitions analogous to bulk silicon.
  • While structural transitions are similar, vibrational properties suggest unique nanoscale behavior.
  • These findings contribute to understanding silicon nanostructures under extreme conditions.