One-pot aqueous synthesis of cysteine-capped
... nanowires can be tuned from a few nanometers to tens of nanometers, so that they exhibit strong quantum confinement effects. Their optical, electronic, and magnetic properties can be altered by in-situ chemical doping or post surface modification. For example, the photostability of CdSe nanowires ca ...
... nanowires can be tuned from a few nanometers to tens of nanometers, so that they exhibit strong quantum confinement effects. Their optical, electronic, and magnetic properties can be altered by in-situ chemical doping or post surface modification. For example, the photostability of CdSe nanowires ca ...
Cubic SiC Nanowires: Growth, Characterization and
... function of the etching time (b).The silicon dioxide and the silicon carbide related emissions show different decays. the etching time, while the SiC related emissions showed a linear decrease (Fig. 8b). The SiO2 related emissions decrease in intensity due to material removal. On the contrary, the c ...
... function of the etching time (b).The silicon dioxide and the silicon carbide related emissions show different decays. the etching time, while the SiC related emissions showed a linear decrease (Fig. 8b). The SiO2 related emissions decrease in intensity due to material removal. On the contrary, the c ...
New Visible-Light Active Semiconductors
... semiconductor photocatalyst due to its high activity under UV irradiation, high stability against photocorrosion process, and low cost. Nevertheless, from the whole solar energy spectrum that radiates the earth, UV irradiation only represents 4 %. In the same way, other semiconductors such as ZnO, F ...
... semiconductor photocatalyst due to its high activity under UV irradiation, high stability against photocorrosion process, and low cost. Nevertheless, from the whole solar energy spectrum that radiates the earth, UV irradiation only represents 4 %. In the same way, other semiconductors such as ZnO, F ...
Core–shell semiconductor nanocrystal
Core–shell semiconducting nanocrystals (CSSNCs) are a class of materials which have properties intermediate between those of small, individual molecules and those of bulk, crystalline semiconductors. They are unique because of their easily modular properties, which are a result of their size. These nanocrystals are composed of a quantum dot semiconducting core material and a shell of a distinct semiconducting material. The core and the shell are typically composed of type II–VI, IV–VI, and III–V semiconductors, with configurations such as CdS/ZnS, CdSe/ZnS, CdSe/CdS, and InAs/CdSe (typical notation is: core/shell) Organically passivated quantum dots have low fluorescence quantum yield due to surface related trap states. CSSNCs address this problem because the shell increases quantum yield by passivating the surface trap states. In addition, the shell provides protection against environmental changes, photo-oxidative degradation, and provides another route for modularity. Precise control of the size, shape, and composition of the core and shell enable the emission wavelength to be tuned over a wider range of wavelengths than with either individual semiconductor. These materials have found applications in biological systems and optics.
