charge transfer – TechConnect Briefs

Ion beam sputter deposition technique for direct growth of Ge quantum dots on a graphene/SiO2/Si substrate

Yang Y., Yunnan University, CN

The quantum dots (QDs)/graphene hybrid structure shows excellent photoresponse abilities in photodefectivity devices due to the unique QDs quantum confinement and the ultrahigh carrier mobility of graphene. Thus, this project invented the ion beam sputtering [...]

Spectroscopic study on the charge redistribution between Au and Ag in Au@Ag core-shell nanoparticles

Nishimura S., Anh D.T.N., Mott D., Ebitani K., Maenosono S., Japan Advanced Institute of Science and Technology, JP

Charge transfer in heteromeric structures such as Au@Ag core-shell nanoparticles (NPs) and Au@Ag@Au double-shell NPs was demonstrated using X-ray absorption near-edge structure (XANES) and X-ray photoelectron spectroscopy (XPS) techniques. XANES analyses confirmed that the d-orbital [...]

Fabrication and characterization of optoelectric device using CdSe nanocrystal quantum dots/single-walled carbon nanotubes heterostructure

Shim H-C, Jeong S., Kim S., Han C-S, Korea Advanced Institue of Science and Technology (KAIST), KR

The ability to transport extracted carriers from the development of NQDs (nanocrystal quantum dots) based optoelectronic sensors have drawn considerable attention due to NQDs’ unique optical properties. Coupling of NQDs to 1-D nanostructures such as [...]

Nanoscaled Science and Engineering for Sensing : Quantum Dots Fluorescence Quenching for Organic NO2 Sensing

Nieto S., Santana A., Delgado R., Hernandez S.P., Chamberlain R.T., Lareau R., Castro M.E., The University of Puerto Rico Chemical Imaging Center, US

We report on femtosecond laser off-resonance excitation of quantum dots-TNT assemblies in solution. The fluorescence emission from quantum dots shifts toward lower wavelengths and the relative peak intensity decreases with the amount of TNT added [...]