Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Doppler Effect - I00:56

Doppler Effect - I

5.9K
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
5.9K
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

1.6K
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
1.6K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

All-Solution-Processed Sky-Blue Perovskite Electroluminescence Device via Integrated Supramolecular Host-Guest Post-Treatment.

Nano letters·2026
Same author

Stabilizing the Buried Interface Phase for Perovskite LEDs with a Remarkable <i>T</i><sub>90</sub> Lifetime at 1000 nit.

Nano letters·2025
Same author

Broad-range flow velocimetry enabled by pulse-width-dependent luminescence of core-multishell upconversion nanoprobes.

Nanoscale·2025
Same author

Zn<sup>2+</sup>-Doped CsPbI<sub>3</sub>/PVDF Composite Films with Enhanced Stability and Photoluminescence Quantum Yield for White-Light LED Applications.

ACS applied materials & interfaces·2025
Same author

Rigid-flexible coupling: exquisite modulation of asymmetrical spiro-type hole-transporting materials toward efficient and stable perovskite solar cells.

Chemical science·2025
Same author

Tailoring Carrier Dynamics by Band Alignment Engineering in Quasi-2D Perovskite LED.

Nano letters·2025

Related Experiment Video

Updated: Jan 3, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

10.1K

Perceiving Linear-Velocity by Multiphoton Upconversion.

Hai Huang1,2,3, Feng Huang1,2,3, Lin Lin1,2,3

  • 1College of Physics and Energy , Fujian Normal University , Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, Fuzhou 350117 , China.

ACS Applied Materials & Interfaces
|November 15, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces a novel method for detecting object linear velocity using the rising edge of upconversion processes. By analyzing spectral changes in lanthanide-doped nanocrystals, accurate speed sensing is achieved.

Keywords:
Fluoride nanocrystalsLanthanide luminescent materialsNon-steady-state emissionUpconversionVelocimetry

More Related Videos

Multiphoton Intravital Imaging for Monitoring Leukocyte Recruitment during Arteriogenesis in a Murine Hindlimb Model
07:50

Multiphoton Intravital Imaging for Monitoring Leukocyte Recruitment during Arteriogenesis in a Murine Hindlimb Model

Published on: September 30, 2021

1.7K
High-speed Particle Image Velocimetry Near Surfaces
11:59

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

33.7K

Related Experiment Videos

Last Updated: Jan 3, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

10.1K
Multiphoton Intravital Imaging for Monitoring Leukocyte Recruitment during Arteriogenesis in a Murine Hindlimb Model
07:50

Multiphoton Intravital Imaging for Monitoring Leukocyte Recruitment during Arteriogenesis in a Murine Hindlimb Model

Published on: September 30, 2021

1.7K
High-speed Particle Image Velocimetry Near Surfaces
11:59

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

33.7K

Area of Science:

  • Photonics and optical sensing
  • Materials science
  • Nanotechnology

Background:

  • Upconversion processes are typically studied for their steady-state emission.
  • The dynamic behavior of the upconversion rising edge remains underexplored.
  • Lanthanide-doped materials exhibit unique optical properties.

Purpose of the Study:

  • To demonstrate a new method for linear velocity detection using upconversion rising edge characteristics.
  • To explore the relationship between emitter velocity and upconversion multiphoton process ratios.
  • To develop a practical speed sensing application for upconversion nanocrystals.

Main Methods:

  • Theoretical modeling and numerical simulation of upconversion dynamics.
  • Fabrication of core-shell upconversion nanocrystals.
  • Experimental calibration of object speed using a homemade turnplate and spectral analysis.

Main Results:

  • Distinct rising edge characteristics were observed for upconversion processes with varying photon numbers.
  • The emission intensity ratio of different multiphoton processes was found to correlate with linear velocity.
  • Successful calibration of a turnplate's speed was achieved using the developed sensing probe.

Conclusions:

  • The rising edge of upconversion processes can be effectively utilized for linear velocity detection.
  • This work presents a novel speed sensing method based on spectral analysis of moving emitters.
  • Lanthanide-doped upconversion materials offer new opportunities in advanced sensing applications.