Conformal coating of ferroelectric oxides on carbon nanotubes

F. Mendoza*, A. Kumar, R. Martinez, J. F. Scott, B. Weiner, R. S. Katiyar, G. Morell

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Nano-size barium strontium titanate Ba0.7Sr0.3TiO3 (BST) maize-bead-like structures were conformally coated on bamboo-like carbon nanotubes (BCNTs) grown on copper substrates. Initially BCNTs were fabricated by hot-filament chemical vapor deposition (HF-CVD) techniques on Cu substrates. Later, BST was deposited on BCNT/Cu by pulsed laser deposition (PLD) techniques. Surface morphology, cross-sectional image and topography of the BCNTs and BCNT-BST maize-like nanostructures were investigated by X-ray, field-emission scanning electron microscopy (FE-SEM), Raman spectroscopy and tunneling electron microscopy (TEM) techniques. BST-BCNT hybrid structures provide an additional degree of freedom to interconnect the oxides, which in turn provides [3D] geometry for functionality. There had been a popular misconception that oxides cannot grow on CNT at high temperature; this long-standing problem has now been solved. The present unregistered nanostructures can be used as sensors; however, if these structures are made as registered arrays, they can be used as nonvolatile memory elements and high-energy density capacitors. Copyright (C) EPLA, 2012

Original languageEnglish
Article number27001
Number of pages5
JournalEPL
Volume97
Issue number2
DOIs
Publication statusPublished - Jan 2012

Keywords

  • CHEMICAL-VAPOR-DEPOSITION
  • THIN-FILMS
  • GROWTH
  • BAMBOO
  • MODEL

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