Qingyan Han

ORCID: 0000-0003-1619-2628
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Research Areas
  • Luminescence Properties of Advanced Materials
  • Luminescence and Fluorescent Materials
  • Solid State Laser Technologies
  • Gold and Silver Nanoparticles Synthesis and Applications
  • Inorganic Fluorides and Related Compounds
  • Nanocluster Synthesis and Applications
  • Perovskite Materials and Applications
  • Quantum Dots Synthesis And Properties
  • Radiation Detection and Scintillator Technologies
  • Glass properties and applications
  • Nanoplatforms for cancer theranostics
  • Copper-based nanomaterials and applications
  • Advanced biosensing and bioanalysis techniques
  • Biosensors and Analytical Detection
  • Random lasers and scattering media
  • Optical properties and cooling technologies in crystalline materials
  • Postharvest Quality and Shelf Life Management
  • Advanced Condensed Matter Physics
  • Laser-Ablation Synthesis of Nanoparticles
  • Gas Sensing Nanomaterials and Sensors
  • Atomic and Subatomic Physics Research
  • Nanomaterials and Printing Technologies
  • Spectroscopy and Chemometric Analyses
  • Plasmonic and Surface Plasmon Research
  • Smart Agriculture and AI

Xi’an University of Posts and Telecommunications
2017-2025

China XD Group (China)
2014-2019

Shaanxi Normal University
2014-2016

Surface-enhanced Raman spectroscopy represents a highly efficient detection method, offering significant advantages in the identification and of target analytes food. To ensure that substrate exhibits high sensitivity, it is essential to facilitate formation stable plasmonic "hot spot" regions. In this study, gold nanospheres (Au NSs) were synthesized on capillary substrates via situ growth seed-mediated method. The results demonstrated optimal signal enhancement was achieved when APTES...

10.1021/acsanm.4c06343 article EN ACS Applied Nano Materials 2025-01-22

Rare earth ion-doped upconversion materials show great potential applications in optical and optoelectronic devices due to their novel properties.

10.1039/c4ce00627e article EN CrystEngComm 2014-01-01

A single silica-shell isolated Au-Ag alloy nanoparticle is used for investigating a metal-enhanced fluorescence effect. Well-dispersed nanoparticles are prepared by the facile chemical method, and property of local surface plasmon resonance controlled adjusting metal component shell thickness. The distance dependence enhancement studied systematically with different silica thickness ranging from 2 to 35 nm. isolation not only adjusts between fluorophore emitters but also improves stability particle.

10.1364/ao.55.009131 article EN Applied Optics 2016-11-04

Constructing core-shell structures can effectively reduce the surface quenching effect of luminescent materials, which becomes an effective method to enhance upconversion luminescence. In this work, a series NaLnF<sub>4</sub>@NaLnF<sub>4</sub> (Ln = Y<sup>3+</sup>, Yb<sup>3+</sup>, Ho<sup>3+</sup>) microcrystals is successfully synthesized based on epitaxial growth technology, thereby enhancing and regulating emission...

10.7498/aps.71.20211719 article EN Acta Physica Sinica 2022-01-01

The ability to control the upconversion (UC) luminescence patterns in space from lanthanide-doped UC materials is very important for many applications including three-dimensional color displays, optical waveguides and communication. In this work, fascinating could be adjusted blue or green flower-like emission pattern red flame-like irradiation with a enhancement single β-NaYF4:Yb3+/(Tm3+ Er3+) microcrystal (MC) by varying excitation position. red-to-blue (R/B) red-to-green (R/G) intensity...

10.1039/c9ra03182k article EN cc-by-nc RSC Advances 2019-01-01

A series of the hexagonal-phase NaLuF<sub>4</sub>:20.0%Yb<sup>3+</sup>/2.0%Ho<sup>3+</sup>/12.0% Ce<sup>3+</sup>@NaLuF<sub>4</sub>:<i>x</i>%Yb<sup>3+</sup> core-shell (CS) nanocrystals with codoping different Yb<sup>3+</sup> ions in shell is successfully built by a sequential growth process. The crystal structures and morphologies samples are characterized X-ray diffractometer transmission...

10.7498/aps.68.20190441 article EN Acta Physica Sinica 2019-01-01
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