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 Experiment Videos

Charge separation and surface reconstruction: a Mn2+ doping study.

Zoran V Saponjic1, Nada M Dimitrijevic, Oleg G Poluektov

  • 1Chemistry Division, Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. Rajh@anl.gov

The Journal of Physical Chemistry. B
|December 15, 2006
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Infrared Spectroelectrochemical Insights into Rhenium-Based Supramolecular Assemblies for Electron Storage and Transfer.

Inorganic chemistry·2026
Same author

Tracking Optical Phonon Dynamics in InP Nanocrystals via Transient Absorption and Femtosecond Stimulated Raman Spectroscopy.

ACS nano·2026
Same author

Nanosecond Structure of Radical Pair Intermediates from High-Frequency Quantum Oscillations: Insight into the Q<sub>A</sub><sup>•-</sup> to Q<sub>B</sub> Electron Transfer Step in Purple Bacterial Photosynthesis.

The journal of physical chemistry. B·2026
Same author

Uniaxial spin texture in a superconducting electron gas revealed by exchange interactions.

Science advances·2026
Same author

Phonon modulation of strongly coupled gold tetrahedral plasmonic nanoparticles and a carbocyanine J-aggregate.

Nanoscale·2026
Same author

Jahn-Teller distortion controls electron transfer in photoexcited Cu(i) donor-acceptor systems.

Chemical science·2026
Same journal

Donor-Acceptor Separation Augments Temperature Dependence of Kinetic Isotope Effects in NADH Model Hydride Transfer Reactions: Mimicking Enzyme versus Mutant Dynamics.

The journal of physical chemistry. B·2026
Same journal

Disordered Worm-Like Clusters in a Hexagonal Mesophase Former: Simulation and Thermodynamic Description.

The journal of physical chemistry. B·2026
Same journal

Comparative Biophysical Analysis of Healthy and Inflamed Intestinal Membrane Models Using Langmuir Monolayers.

The journal of physical chemistry. B·2026
Same journal

Phosphoserine Charge State Drives Ion Condensation and Spatial Polyamine Presentation in Multirepeat Silaffin.

The journal of physical chemistry. B·2026
Same journal

pH-Dependent Conformational Transition of the Glutamate-GABA Antiporter GadC Revealed by <sup>19</sup>F NMR.

The journal of physical chemistry. B·2026
Same journal

Hydrogen-Bond Network in Equimolar <i>N</i>-Methylacetamide-Water: Integrated Neutron Scattering, Molecular Dynamics, DFT-NBO-AIM, and Machine Learning Analysis.

The journal of physical chemistry. B·2026
See all related articles

This study synthesized manganese-doped titanium dioxide (TiO2) nanoparticles. Manganese ions occupy distinct sites, influencing their properties and potential applications in transparent magnetic films.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Solid State Chemistry

Background:

  • Titanium dioxide (TiO2) nanoparticles are widely studied for their photocatalytic and electronic properties.
  • Doping TiO2 with transition metals can modify its characteristics, leading to novel functionalities.
  • Understanding the precise location and behavior of dopant ions is crucial for material design.

Purpose of the Study:

  • To synthesize manganese (Mn)-doped anatase TiO2 nanoparticles.
  • To investigate the incorporation sites and oxidation states of Mn ions within the TiO2 lattice.
  • To explore the impact of Mn doping on the optical, electronic, and magnetic properties of TiO2 nanoparticles.

Main Methods:

  • Hydrothermal synthesis using scrolled TiO2 nanotubes and MnCl2.

Related Experiment Videos

  • X-ray absorption fine structure (FT-XAFS) for site incorporation confirmation.
  • Electron paramagnetic resonance (EPR) and X-ray absorption near edge spectroscopy (XANES) for oxidation state and coordination environment determination.
  • High-field (130 GHz) EPR to distinguish Mn sites.
  • Dialysis to assess Mn leaching.
  • Light excitation EPR to study photoactivity.

    • Main Results:

    • Mn2+ ions were successfully incorporated into substitutional sites of anatase TiO2.
    • EPR revealed two distinct Mn sites: undercoordinated surface and octahedral core.
    • Surface Mn ions were easily leached, while core Mn ions were strongly bound.
    • Surface Mn ions participated in charge separation upon light excitation; core Mn ions did not.
    • Mn-doped TiO2 nanoparticles exhibited superparamagnetic behavior at room temperature with a saturation magnetic moment of 1.23 μB/Mn atom.
    • Optically transparent films were synthesized from doped nanoparticles.

    Conclusions:

    • The synthesis method allows for controlled doping of TiO2 nanoparticles with Mn.
    • The location of Mn ions (surface vs. core) dictates their stability and photoactivity.
    • Doping the nanoparticle core with Mn2+ induces room-temperature superparamagnetism and optical transparency.
    • These findings suggest potential applications in spintronics and transparent magnetic materials.