Non-catalytic and substrate-free method to titania-doped W 18O 49 nanorods: Growth, characterizations, and electro-optical properties

Hsuan Ching Lin, Cherng Yuh Su, Yuan Hsiang Yu, Chung Kwei Lin

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In the present study, titania-doped (Ti-doped) W 18O 49 nanorods have been prepared using a modified plasma arc gas condensation technique. Characterizations by field-emission gun scanning electron microscopy, X-ray powder diffraction, high-resolution transmission electron microscopy and high-resolution X-ray photoelectron spectroscopy indicate that the as-prepared nanorods with a singlecrystalline monoclinic W 18O 49 phase are of 20-100 nm in diameter and several micrometers in length. The Raman peaks of the Ti-doped W 18O 49 nanorods show a red-shift Raman peaks, and an additional greenemission peak at 497 nm is observed in the photoluminescence (PL) spectrum compared to pure W 18O 49 nanorods. Field-emission (FE) measurements reveal that the turn-on (E to) and threshold (E thr) voltages of the Ti-doped W 18O 49 nanorods are 2.2 and 3.4 V/lm, respectively. A vapor-solid process that does not involve the use of catalyst is proposed for the nanorod growth mechanism. Experimental results show that the additional defects resulting from titania doping are responsible for the enhancement of the optical and FE properties of the pure W 18O 49 nanorods.

Original languageEnglish
Article number665
JournalJournal of Nanoparticle Research
Volume14
Issue number1
DOIs
Publication statusPublished - Jan 2012

Fingerprint

Nanorods
Titanium
Optical Properties
nanorods
Optical properties
titanium
Substrate
optical properties
Field Emission
Substrates
Field emission
field emission
Raman
High Resolution Spectroscopy
X-ray Spectroscopy
high resolution
Photoluminescence
Transmission Electron Microscopy
Scanning Electron Microscopy
High resolution transmission electron microscopy

Keywords

  • Doped
  • Field-emission property
  • Nanorods
  • Photoluminescence
  • Synthesis
  • Titania
  • Tungsten oxide

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Modelling and Simulation
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering

Cite this

Non-catalytic and substrate-free method to titania-doped W 18O 49 nanorods : Growth, characterizations, and electro-optical properties. / Lin, Hsuan Ching; Su, Cherng Yuh; Yu, Yuan Hsiang; Lin, Chung Kwei.

In: Journal of Nanoparticle Research, Vol. 14, No. 1, 665, 01.2012.

Research output: Contribution to journalArticle

@article{e717bf5fe7654d8284cd35a217bd87e1,
title = "Non-catalytic and substrate-free method to titania-doped W 18O 49 nanorods: Growth, characterizations, and electro-optical properties",
abstract = "In the present study, titania-doped (Ti-doped) W 18O 49 nanorods have been prepared using a modified plasma arc gas condensation technique. Characterizations by field-emission gun scanning electron microscopy, X-ray powder diffraction, high-resolution transmission electron microscopy and high-resolution X-ray photoelectron spectroscopy indicate that the as-prepared nanorods with a singlecrystalline monoclinic W 18O 49 phase are of 20-100 nm in diameter and several micrometers in length. The Raman peaks of the Ti-doped W 18O 49 nanorods show a red-shift Raman peaks, and an additional greenemission peak at 497 nm is observed in the photoluminescence (PL) spectrum compared to pure W 18O 49 nanorods. Field-emission (FE) measurements reveal that the turn-on (E to) and threshold (E thr) voltages of the Ti-doped W 18O 49 nanorods are 2.2 and 3.4 V/lm, respectively. A vapor-solid process that does not involve the use of catalyst is proposed for the nanorod growth mechanism. Experimental results show that the additional defects resulting from titania doping are responsible for the enhancement of the optical and FE properties of the pure W 18O 49 nanorods.",
keywords = "Doped, Field-emission property, Nanorods, Photoluminescence, Synthesis, Titania, Tungsten oxide",
author = "Lin, {Hsuan Ching} and Su, {Cherng Yuh} and Yu, {Yuan Hsiang} and Lin, {Chung Kwei}",
year = "2012",
month = "1",
doi = "10.1007/s11051-011-0665-8",
language = "English",
volume = "14",
journal = "Journal of Nanoparticle Research",
issn = "1388-0764",
publisher = "Springer Netherlands",
number = "1",

}

TY - JOUR

T1 - Non-catalytic and substrate-free method to titania-doped W 18O 49 nanorods

T2 - Growth, characterizations, and electro-optical properties

AU - Lin, Hsuan Ching

AU - Su, Cherng Yuh

AU - Yu, Yuan Hsiang

AU - Lin, Chung Kwei

PY - 2012/1

Y1 - 2012/1

N2 - In the present study, titania-doped (Ti-doped) W 18O 49 nanorods have been prepared using a modified plasma arc gas condensation technique. Characterizations by field-emission gun scanning electron microscopy, X-ray powder diffraction, high-resolution transmission electron microscopy and high-resolution X-ray photoelectron spectroscopy indicate that the as-prepared nanorods with a singlecrystalline monoclinic W 18O 49 phase are of 20-100 nm in diameter and several micrometers in length. The Raman peaks of the Ti-doped W 18O 49 nanorods show a red-shift Raman peaks, and an additional greenemission peak at 497 nm is observed in the photoluminescence (PL) spectrum compared to pure W 18O 49 nanorods. Field-emission (FE) measurements reveal that the turn-on (E to) and threshold (E thr) voltages of the Ti-doped W 18O 49 nanorods are 2.2 and 3.4 V/lm, respectively. A vapor-solid process that does not involve the use of catalyst is proposed for the nanorod growth mechanism. Experimental results show that the additional defects resulting from titania doping are responsible for the enhancement of the optical and FE properties of the pure W 18O 49 nanorods.

AB - In the present study, titania-doped (Ti-doped) W 18O 49 nanorods have been prepared using a modified plasma arc gas condensation technique. Characterizations by field-emission gun scanning electron microscopy, X-ray powder diffraction, high-resolution transmission electron microscopy and high-resolution X-ray photoelectron spectroscopy indicate that the as-prepared nanorods with a singlecrystalline monoclinic W 18O 49 phase are of 20-100 nm in diameter and several micrometers in length. The Raman peaks of the Ti-doped W 18O 49 nanorods show a red-shift Raman peaks, and an additional greenemission peak at 497 nm is observed in the photoluminescence (PL) spectrum compared to pure W 18O 49 nanorods. Field-emission (FE) measurements reveal that the turn-on (E to) and threshold (E thr) voltages of the Ti-doped W 18O 49 nanorods are 2.2 and 3.4 V/lm, respectively. A vapor-solid process that does not involve the use of catalyst is proposed for the nanorod growth mechanism. Experimental results show that the additional defects resulting from titania doping are responsible for the enhancement of the optical and FE properties of the pure W 18O 49 nanorods.

KW - Doped

KW - Field-emission property

KW - Nanorods

KW - Photoluminescence

KW - Synthesis

KW - Titania

KW - Tungsten oxide

UR - http://www.scopus.com/inward/record.url?scp=84862791497&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84862791497&partnerID=8YFLogxK

U2 - 10.1007/s11051-011-0665-8

DO - 10.1007/s11051-011-0665-8

M3 - Article

AN - SCOPUS:84862791497

VL - 14

JO - Journal of Nanoparticle Research

JF - Journal of Nanoparticle Research

SN - 1388-0764

IS - 1

M1 - 665

ER -