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Designed Synthesis of Solid and Hollow Cu2–xTe Nanocrystals with Tunable Near-Infrared Localized Surface Plasmon Resonance
- Source :
- The Journal of Physical Chemistry C. 117:21955-21964
- Publication Year :
- 2013
- Publisher :
- American Chemical Society (ACS), 2013.
-
Abstract
- Solid and hollow structures of Cu2–xTe nanocrystals are synthesized by the injection of a Te–TOP solution at different reaction times. Both types of Cu2–xTe nanocrystals exhibit an intense absorption peak (localized surface plasmon resonance (LSPR)) in the near-infrared region, arising from excess holes in the valence band, and high molar extinction coefficients of 2.6 × 107 M–1 cm–1 at 1150 nm and 8.1 × 107 M–1 cm–1 at 1200 nm are demonstrated for the solid-type and hollow-type Cu2–xTe nanocrystals, respectively. The experimentally observed extinction spectra and calculated extinction spectra based on the electrostatic approximation are studied. The LSPR responses in the near-infrared (NIR) region for both solid and hollow Cu2–xTe nanocrystals are affected by the refractive index of the medium, whereas the NIR resonance shift is more obvious in the hollow-type Cu2–xTe nanocrystals. Furthermore, the localized surface plasmon band of the Cu2–xTe nanostructures can be tuned by post processing via oxidation ...
- Subjects :
- Materials science
Nanostructure
Near-infrared spectroscopy
Analytical chemistry
Molecular physics
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
General Energy
Nanocrystal
Extinction (optical mineralogy)
Physical and Theoretical Chemistry
Surface plasmon resonance
Absorption (electromagnetic radiation)
Refractive index
Localized surface plasmon
Subjects
Details
- ISSN :
- 19327455 and 19327447
- Volume :
- 117
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry C
- Accession number :
- edsair.doi...........fdcae93ae66b5f97152f060e915c76a8