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

Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

1.6K
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
1.6K
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

1.2K
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
1.2K
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

3.3K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
3.3K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.1K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
2.1K
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.5K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.5K

You might also read

Related Articles

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

Sort by
Same author

High-Efficiency Asymmetric Spin Transport Enabled by Nanocolumn Molecular Semiconductors.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Clinical outcomes of myeloablative allogeneic peripheral blood stem cell transplantation for relapsed/refractory T-ALL/LBL: A single-center study.

Transplant immunology·2026
Same author

Crystalline-amorphous homojunction engineering in carbon nitride for solar-driven nitrate into ammonia conversion.

Chemical science·2026
Same author

Preparation and Characterization of Bacterial Cellulose/Carboxymethyl Cellulose Composite Films.

Materials (Basel, Switzerland)·2026
Same author

Chondroitin sulfate-functionalized GSH-responsive lipid-nanoparticle inhibits melanoma metastasis through suppressing STAT3 activation.

International journal of pharmaceutics·2026
Same author

Photoluminescent Thermal Response Regulation in Zinc Metal Halide Materials Through Sn<sup>2+</sup> Alloying-Induced Carrier Localization for Visualization-Enabled Temperature Sensor.

Small (Weinheim an der Bergstrasse, Germany)·2026

Related Experiment Video

Updated: Dec 30, 2025

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation
11:20

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

Published on: August 30, 2017

7.8K

Multiple logic operations based on chemically triggered upconversion fluorescence switching.

Yang Yu1, Sai Xu1, Yuefeng Gao2

  • 1School of Science, Dalian Maritime University, Dalian 116026, People's Republic of China.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|January 19, 2020
PubMed
Summary

Researchers developed an upconversion nanoparticle system for ion sensing. This system enables complex molecular logic gates for potential biomedical and computational applications.

Keywords:
Energy transferLogic gatesNanocompositeUpconversion luminescence

More Related Videos

Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo
07:19

Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo

Published on: August 4, 2021

5.2K
Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
15:04

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

Published on: May 18, 2011

13.5K

Related Experiment Videos

Last Updated: Dec 30, 2025

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation
11:20

An Integrated System to Remotely Trigger Intracellular Signal Transduction by Upconversion Nanoparticle-mediated Kinase Photoactivation

Published on: August 30, 2017

7.8K
Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo
07:19

Bioluminescent Optogenetics 2.0: Harnessing Bioluminescence to Activate Photosensory Proteins In Vitro and In Vivo

Published on: August 4, 2021

5.2K
Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
15:04

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

Published on: May 18, 2011

13.5K

Area of Science:

  • Nanotechnology
  • Chemical Sensing
  • Molecular Computing

Background:

  • Integrated logic systems based on upconversion nanoparticles remain a significant challenge.
  • Upconversion nanoparticles offer unique fluorescence properties for sensing applications.

Purpose of the Study:

  • To develop an upconversion nanocomposite system for sensing various ions.
  • To construct multiple molecular logic gates using the developed system.

Main Methods:

  • Utilizing turn-on and turn-off upconversion fluorescence switching.
  • Employing Rhodamine 6G functionalized PEI for specific ion recognition.
  • Leveraging energy transfer processes between nanoparticles and recognition molecules.

Main Results:

  • The upconversion system demonstrated sensing capabilities for hydrion, hydroxyl ions, metal ions, and specific anions (S²⁻, I⁻).
  • The system exhibited turn-on/off fluorescence switching in response to different ion inputs.
  • Multiple molecular logic gates (YES, NOT, OR, AND, NOR, INHIBIT, INHIBIT+OR) were successfully implemented.

Conclusions:

  • The developed upconversion nanocomposite system effectively functions as a multi-ion sensor.
  • The implementation of diverse molecular logic gates shows promise for advanced applications.
  • This work contributes to the advancement of integrated logic systems in biomedicine and molecular calculation.