Electro-Assisted Photo-Luminescence of Colloidal Germanium Nanoparticles
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Anton Fojtik
GH4 is burnt in air to yield a powder which partly dissolves in the form of small colloidal particles in an acetone/cyclohexane mixture. The particles consist of 73% germanium and 27% oxygen. Upon etching with hydrofluoric acid, the particles acquire a blue or blue-green luminescence. The blue-luminescent particles contain no noticeable amount of oxygen and are strongly agglomerated. The luminescence is explained by size quantization of the electronic energy levels. The particles move in an electric field to the anode to form a very thin layer, which, after switching to cathodic polarization, develops a red photo-luminescence, which has a life time of a few ns. This electro-assisted photo-luminescence is gated by the potential of the electrode.
© Oldenbourg Wissenschaftsverlag
Articles in the same Issue
- Preface – Professor Dr. Arnim Henglein on the occasion of his 80th birthday
- Surface Chemistry of Semiconductor Nanocrystals
- Synthesis and Assembling of Semiconductor and Metal Nanocrystals
- The Electronic Role of the TiO2 Light-Scattering Layer in Dye-Sensitized Solar Cells
- Primary Processes During the Photodeposition of Ag Clusters on TiO2 Nanoparticles
- Photoactivity of Sol–Gel Derived Nitridated ZnxTiyOz-Films
- Photothermal Properties of Gold Nanoparticles
- Electro-Assisted Photo-Luminescence of Colloidal Germanium Nanoparticles
- Cobalt-Doped ZnO Nanorods Fabricated by a Simple Wet Chemical Route in Alcoholic Solution
- Influence of the Choice of Indium Precursor and Ligand on the Synthesis of InP Nanocrystals
- Formation of the Silver Hydride Ion AgH+ upon the Reduction of Silver Ions by H· in Aqueous Solution. A Pulse Radiolysis Study
- An Electrochemical Model for Gold Colloid Formation via Citrate Reduction
- Synthesis of Monodisperse PbS Nanoparticles and Their Assembly into Highly Ordered 3D Colloidal Crystals
Articles in the same Issue
- Preface – Professor Dr. Arnim Henglein on the occasion of his 80th birthday
- Surface Chemistry of Semiconductor Nanocrystals
- Synthesis and Assembling of Semiconductor and Metal Nanocrystals
- The Electronic Role of the TiO2 Light-Scattering Layer in Dye-Sensitized Solar Cells
- Primary Processes During the Photodeposition of Ag Clusters on TiO2 Nanoparticles
- Photoactivity of Sol–Gel Derived Nitridated ZnxTiyOz-Films
- Photothermal Properties of Gold Nanoparticles
- Electro-Assisted Photo-Luminescence of Colloidal Germanium Nanoparticles
- Cobalt-Doped ZnO Nanorods Fabricated by a Simple Wet Chemical Route in Alcoholic Solution
- Influence of the Choice of Indium Precursor and Ligand on the Synthesis of InP Nanocrystals
- Formation of the Silver Hydride Ion AgH+ upon the Reduction of Silver Ions by H· in Aqueous Solution. A Pulse Radiolysis Study
- An Electrochemical Model for Gold Colloid Formation via Citrate Reduction
- Synthesis of Monodisperse PbS Nanoparticles and Their Assembly into Highly Ordered 3D Colloidal Crystals
