Related Experiment Video
Updated: Feb 12, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Efficient Charge Separation in Plasmonic ZnS@Sn:ZnO Nanoheterostructure: Nanoscale Kirkendall Effect and Enhanced
Sumana Paul1, Sirshendu Ghosh1, Subodh Kumar De1
1Department of Materials Science , Indian Association for the Cultivation of Science , Kolkata 700032 , India.
Abstract:
Tetravalent Sn doped ZnO nanocrystals show excellent plasmonic absorbance in the visible region. Plasmonic ZnS@Sn:ZnO core-shell heterostructures have been synthesized by the anion exchange process where the O2- is exchanged by S2- anion. An increase of sulfur concentration induces interior hollow structures arising from the different diffusion rates of O2- and S2- ions. Gradual transformation of wurtztie ZnO nanocrystals in the anion exchange process stabilizes the wurtzite crystalline phase of ZnS. Carrier concentration and various types of intrinsic defect states in both ZnO and ZnS result in ultraviolet, blue, and green emissions. The coexistence of exciton-plasmon coupling in the same nanoparticle and efficient electron-hole separation in type II heterostructure increases the photocatalytic activity and photo current gain.
Related Concept Videos
Sources and Properties of Electric Charge
Most atoms additionally constitute another fundamental particle, the neutron. It carries no electrical charge. A...
Formal Charges
Ions and Ionic Charges
Properties of Transition Metals
Trends in Lattice Energy: Ion Size and Charge
Atomic Radii and Effective Nuclear Charge

