Enhanced plasmonic effects in ag decorated amorphous TiO2 nanotube arrays

J. Jeon, R. S. Hyam, D. Choi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In the present investigation SERS sensitivity and plasmonic-photonic interference coupling (P-PIC) in amorphous TiO2 nanotube (A[TNT]) and crystalline silver (Ag) nanoparticles was studied. TNT were synthesized by two step anodization on titanium (Ti) substrate. Using thermal evaporation, 20 nm Ag film overcoating on TNT structures was synthesized, which coalescence to form Ag nanoparticles, acting as a three dimensional (3D) surface enhanced raman spectroscopy (SERS) substrate for rhodamine 6G (R6G) molecule detection. The nanoarchitecture phase formation is confirmed by X-ray diffraction (XRD) analysis, Raman spectroscopy analysis. Surface morphology and the salient features are studied by scanning electron microscopy (SEM). Current decay time is also studied and compared for the samples respectively which show large current decay time for A[TNT]-Ag as compared to C[TNT-Ag]. UV- visible absorption studies shows larger red shift in the absorption band gap edge of A[TNT]-Ag samples as compared to C[TNT-Ag] samples. Moreover the TNT length variation in A[TNT]-Ag samples results into constructive or destructive interference, which in turn affect the P-PIC and R6G molecule detection as well as SERS intensity which was approximately three time higher than C[TNT-Ag].

Original languageEnglish
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
EditionCP676
ISBN (Electronic)9781785610363
StatePublished - 2015
Externally publishedYes
Event5th Asia International Symposium on Mechatronics, AISM 2015 - Guilin, China
Duration: 7 Oct 201510 Oct 2015

Publication series

NameIET Conference Publications
NumberCP676
Volume2015

Conference

Conference5th Asia International Symposium on Mechatronics, AISM 2015
Country/TerritoryChina
CityGuilin
Period7/10/1510/10/15

Keywords

  • Amorphous
  • Photonic layer
  • Plasmonic-photonic interference coupling
  • SERS sensitivity.
  • TiO nanotubes

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