نتایج جستجو برای: semiconductor nanocrystals
تعداد نتایج: 70216 فیلتر نتایج به سال:
Organic pigments such as indigos, quinacridones, and phthalocyanines are widely produced industrially as colorants for everyday products as various as cosmetics and printing inks. Herein we introduce a general procedure to transform commercially available insoluble microcrystalline pigment powders into colloidal solutions of variously sized and shaped semiconductor micro- and nanocrystals. The ...
We review the room temperature optical and electronic properties of single semiconductor nanocrystals, which are made by chemical synthesis. Confocal luminescence spectroscopy of single nanocrystals reveals a blinking behavior apparently due to an intermittent photoionization. To investigate this further, the dielectric constant and electrostatic charge of single CdSe nanocrystals was measured....
In the next two decades, nanoscience and nanotechnologies will transfer into new products and processes. One emerging area where this challenge will be successfully met is the field of semiconductor nanocrystals (NCs) (see, for instance, Norris et al., 2008). The promises offered by dielectric layers with hosted semiconductor nanocrystals in applications include production of silicon-based ligh...
Nanocrystals of material B may form on a substrate of material A in order to relieve the strain from the B/A crystalline mismatch. In the most simplistic approximation, if such an elastic relaxation outweighs the additional surface energy due to the island walls, it will create the thermodynamic tendency for the nanocrystal formation. Hence one can ‘engineer’ ultra-small and crystallographicall...
An architecture in which nand p-type materials alternate laterally in the active ®lm of a device with a spatial period of about a carrier diusion length would lead to ecient (opto)electronic devices for photovoltaic energy conversion and switching, among others. Such an architecture, although dicult to achieve with conventional silicon-based schemes, is within reach using semiconductor nanoc...
Graphene-based materials are elective materials for a number of technologies due to their unique properties. Also, semiconductor nanocrystals have been extensively explored due to their size-dependent properties that make them useful for several applications. By coupling both types of materials, new applications are envisaged that explore the synergistic properties in such hybrid nanostructures...
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