Coupling of Ag Nanoparticle with Inverse Opal Photonic Crystals as a Novel Strategy for Upconversion Emission Enhancement of NaYF4: Yb(3+), Er(3+) Nanoparticles.
Rare-earth-ion-doped upconversion (UC) nanoparticles have generated considerable interest because of their potential application in solar cells, biological labeling, therapeutics, and imaging. However, the applications of UC nanoparticles were still limited because of their low emission efficiency. Photonic crystals and noble metal nanoparticles are applied extensively to enhance the UC emission of rare earth ions. In the present work, a novel substrate consisting of inverse opal photonic crystals and Ag nanoparticles was prepared by the template-assisted method, which was used to enhance the UC emission of NaYF4: Yb(3+), Er(3+) nanoparticles. The red or green UC emissions of NaYF4: Yb(3+), Er(3+) nanoparticles were selectively enhanced on the inverse opal substrates because of the Bragg reflection of the photonic band gap. Additionally, the UC emission enhancement of NaYF4: Yb(3+), Er(3+) nanoparticles induced by the coupling of metal nanoparticle plasmons and photonic crystal effects was realized on the Ag nanoparticles included in the inverse opal substrate. The present results demonstrated that coupling of Ag nanoparticle with inverse opal photonic crystals provides a useful strategy to enhance UC emission of rare-earth-ion-doped nanoparticles.
College of Materials Science and Engineering, Kunming University of Science and Technology , Kunming 650093, China.
Bo
B
Shao
College of Materials Science and Engineering, Kunming University of Science and Technology , Kunming 650093, China.
Zhengwen
Z
Yang
College of Materials Science and Engineering, Kunming University of Science and Technology , Kunming 650093, China.
Yida
Y
Wang
College of Materials Science and Engineering, Kunming University of Science and Technology , Kunming 650093, China.
Jun
J
Li
College of Materials Science and Engineering, Kunming University of Science and Technology , Kunming 650093, China.
Jianzhi
J
Yang
College of Materials Science and Engineering, Kunming University of Science and Technology , Kunming 650093, China.
Jianbei
J
Qiu
College of Materials Science and Engineering, Kunming University of Science and Technology , Kunming 650093, China.
Zhiguo
Z
Song
D004560:Electricity; D004871:Erbium / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D017785:Photons; D012822:Silicon Dioxide / Q000737:chemistry; D015018:Ytterbium / Q000737:chemistry*; D015019:Yttrium / Q000737:chemistry*
C525362:sodium yttriumtetrafluoride; D015019:Yttrium; D012822:Silicon Dioxide; D004871:Erbium; D015018:Ytterbium; D005459:Fluorides
NaYF4: Yb3+, Er3+ nanoparticles; SiO2 inverse opal including Ag nanoparticles; enhancement; surface plasmon resonance; upconversion emission