Influence of Ni, Ti and NiTi alloy nanoparticles on hydrothermally grown ZnO nanowires for photoluminescence enhancement

Nandini Patra, Siva Krishna Karuturi, Nilesh J. Vasa, Daisuke Nakamura, M. Higashihata, Vipul Singh, I. A. Palani

Research output: Contribution to journalArticle

Abstract

In this work, surface-plasmon mediated enhanced photoluminescence emission has been investigated on Ni, Ti, and NiTi coated ZnO nanowires (NWs). ZnO NWs have been synthesized using a facile hydrothermal process, where NWs are coated with three different metals (Ni, Ti, and NiTi) using sputter deposition technique. It has been found that there is a significant improvement in near band edge emission (NBE) and passivation in deep level emission (DLE) in such metal embedded ZnO NWs and these emission properties can be tuned as we change the metal. Notably, we have achieved the highest enhancement of ∼6 times in NBE and best suppression of ∼15 times) in DLE by alloying of such metals (Ni and Ti). Such a remarkable DLE suppression is attributed to the presence of defect centers in ZnO NWs. The defect transition energy of ZnO is in resonance with the surface plasmon energy of metal nanoparticles, which leads to the conversion of DLE into NBE. The enhancement of NBE and suppression of DLE are possible due to the surface plasmon resonance coupling between metal nanoparticles (NPs) and ZnO NWs. Therefore, we conclude that earth abundant metals, such as Ni and Ti show significant SPR coupling on ZnO NWs and the alloying (NiTi) of such metals presents further improved SPR compared to the respective individual metals.

LanguageEnglish
Pages1119-1129
Number of pages11
JournalJournal of Alloys and Compounds
Volume770
DOIs
Publication statusPublished - Jan 5 2019

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Zinc Oxide
Sputter deposition
Plasmons
Metal nanoparticles
Binary alloys
Surface plasmon resonance
Titanium alloys
Alloying
Nanowires
Photoluminescence
Metals
Nanoparticles
Defects
II-VI semiconductors
Passivation
Earth (planet)

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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Influence of Ni, Ti and NiTi alloy nanoparticles on hydrothermally grown ZnO nanowires for photoluminescence enhancement. / Patra, Nandini; Karuturi, Siva Krishna; Vasa, Nilesh J.; Nakamura, Daisuke; Higashihata, M.; Singh, Vipul; Palani, I. A.

In: Journal of Alloys and Compounds, Vol. 770, 05.01.2019, p. 1119-1129.

Research output: Contribution to journalArticle

Patra, Nandini ; Karuturi, Siva Krishna ; Vasa, Nilesh J. ; Nakamura, Daisuke ; Higashihata, M. ; Singh, Vipul ; Palani, I. A. / Influence of Ni, Ti and NiTi alloy nanoparticles on hydrothermally grown ZnO nanowires for photoluminescence enhancement. In: Journal of Alloys and Compounds. 2019 ; Vol. 770. pp. 1119-1129.
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AU - Singh, Vipul

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