Monitoring the orientation of rare-earth-doped nanorods for flow shear tomography.

  title={Monitoring the orientation of rare-earth-doped nanorods for flow shear tomography.},
  author={Jongwook Kim and S{\'e}bastien Michelin and Michiel Hilbers and Lucio Martinelli and {\'E}lodie Chaudan and Gabriel Amselem and Etienne Fradet and Jean-pierre Boilot and Albert M. Brouwer and Charles N. Baroud and Jacques Peretti and Thierry Gacoin},
  journal={Nature nanotechnology},
  volume={12 9},
Rare-earth phosphors exhibit unique luminescence polarization features originating from the anisotropic symmetry of the emitter ion's chemical environment. However, to take advantage of this peculiar property, it is necessary to control and measure the ensemble orientation of the host particles with a high degree of precision. Here, we show a methodology to obtain the photoluminescence polarization of Eu-doped LaPO4 nanorods assembled in an electrically modulated liquid-crystalline phase. We… 

Measuring 3D orientation of nanocrystals via polarized luminescence of rare-earth dopants

A straightforward orientation analysis of Eu3+-doped NaYF4 nanocry crystals using a conventional fluorescence microscope is demonstrated and direct imaging of the rod-shaped nanocrystals proved the high accuracy of the measurement.

Linearly Polarized Emission from Shear-Induced Nematic Phase Upconversion Nanorods.

A facile polypropylene-aided shear-driven method is demonstrated to obtain large-scale orientationally ordered upconversion nanorods, showing a liquid crystalline nematic phase.

Polarization resolved radiation angular patterns of orientationally ordered nanorods

  • A. Kiselev
  • Physics
    Journal of Quantitative Spectroscopy and Radiative Transfer
  • 2019

Measuring the order parameter of vertically aligned nanorod assemblies.

A novel approach employing a unique photoluminescence behaviour of lanthanide-doped crystalline nanorods, of which the emission spectrum contains the detailed information on the structure of the assembly, to provide a more in-depth examination of various assembled nanostructures and the collective dynamics of their building blocks.

Monazite LaPO4:Eu3+ nanorods as strongly polarized nano-emitters.

The synthesized monazite nanorods can serve as an accurate probe in orientation analyses and potential applications, such as in microfluidics and biological detections, and are superior in luminescence efficiency with limited defects.

Zwitterionic Polymers toward the Development of Orientation-Sensitive Bioprobes.

Dynamics with an orientational degree of freedom are fundamental in biological events. Probes with polarized luminescence enable a determination of the orientation. Lanthanide-doped nanocrystals can

Tunable Light Polarization Information from Single Upconverting Fluoride Microcrystal

The key components in display, imaging, data communication, and photoelectric detection fields are low‐dimensional micro‐/nanomaterials with highly anisotropic optoelectronic properties manifesting

Photonic nanostructures of nanodiscs with multiple magneto-optical properties

Smart optical materials (SOM) that allow the tuning of multiple optical properties are of emerging interest for diverse applications in sensing, display and anti-counterfeiting. However, the existing

Orthogonally Polarized Luminescence of Single Bismuth Phosphate Microcrystal Doped with Europium

Rare‐earth‐doped micro/nanocrystals are significant candidates for nanophotonic and quantum information elements. Nevertheless, the polarization of light emission, which serves as one of the most

Highly Polarized Upconversion Emissions from Lanthanide-Doped LiYF4 Crystals as Spatial Orientation Indicators.

This research deepens the understanding of the polarized photoluminescence, and it opens up an avenue toward unique UC orientation sensors.



Optimized combination of intrinsic and form birefringence in oriented LaPO4 nanorod assemblies

The birefringence of colloidal nematic suspensions and thin films of aligned LaPO4 nanorods is quantitatively studied. Single crystalline hexagonal hydrated-LaPO4 nanorods are synthesized with the

LaPO4 Mineral Liquid Crystalline Suspensions with Outstanding Colloidal Stability for Electro‐Optical Applications

Mineral liquid crystals are materials in which mineral's intrinsic properties are combined with the self‐organization behavior of colloids. However, the use of such a system for practical

Polarized photoluminescence from single GaN nanorods: effects of optical confinement.

It is concluded that the optical confinement effects in this size regime play an important role in the observed giant polarization anisotropy.

Anisotropy of interband transitions in InAs quantum wires: An atomistic theory

The electronic and optical properties of [001]-oriented free-standing InAs cylindrical quantum wires (QWRs) with diameters 10‐100 A are calculated using an atomistic, empirical pseudopotential

Electrokinetic instability micromixing.

An electrokinetic process to rapidly stir micro- and nanoliter volume solutions for microfluidic bioanalytical applications and the design and fabrication of two micromixing devices capable of rapidly stirring two fluid streams using this flow phenomenon is presented.

Highly Polarized Photoluminescence and Photodetection from Single Indium Phosphide Nanowires

The fundamental photoluminescence properties of individual, isolated indium phosphide nanowires were characterized to define their potential for optoelectronics and create polarization-sensitive nanoscale photodetectors that may prove useful in integrated photonic circuits, optical switches and interconnects, near-field imaging, and high-resolution detectors.

Polarized Luminescence from Aligned Samples of Nematogenic Lanthanide Complexes

Liquid-crystalline lanthanide complexes (lanthanidomesogens) are a class of molecular materials that have intensively been studied during the last decade. [1] Whereas the first examples of

Fluorescence microscopy for simultaneous observation of 3D orientation and movement and its application to quantum rod-tagged myosin V

A microscopy system and synthesized highly fluorescent, rod-like shaped quantum dots (Q rods), which have linear polarizations, to simultaneously measure the position and 3D orientation of a single fluorescent probe and suggest that in the two-headed bound state, myosin V necks are perpendicular to one another, while in the one- headed bound state the detached trailing myosIn V head is biased forward in part by rotating its lever arm about its own axis.

Micro-Particle Image Velocimetry (microPIV): recent developments, applications, and guidelines.

This review discusses the state of the art of the optical whole-field velocity measurement technique micro-scale Particle Image Velocimetry (microPIV), a useful tool for fundamental research of microfluidic applications in life science, lab-on-a-chip, biomedical research, micro chemical engineering, analytical chemistry and other related fields of research.

Systematic synthesis and characterization of single-crystal lanthanide orthophosphate nanowires.

  • Yue FangA. Xu Han Liu
  • Materials Science, Chemistry
    Journal of the American Chemical Society
  • 2003
The obtained hexagonal structured lanthanide orthophosphate LnPO(4) (Ln = La --> Tb) can convert to the monoclinic monazite structured products, and their morphologies remained the same after calcination at 900 degrees C in air.