IR Hidden Patterns for Security Labels.

Authentication of a product's originality by anticounterfeiting labels represents a crucial point toward protection against forgery. Fast and scalable fabrication methods of original labels with a high degree of protection are in high demand for the protection of valuable goods. Here, we propose a simple strategy for fabrication of hidden security tags with IR luminescent readout by the direct femtosecond laser patterning of silicon-erbium-silicon sandwiched thin films.

All-optical generation of static electric field in a single metal-semiconductor nanoantenna.

Electric field is a powerful instrument in nanoscale engineering, providing wide functionalities for control in various optical and solid-state nanodevices. The development of a single optically resonant nanostructure operating with a charge-induced electrical field is challenging, but it could be extremely useful for novel nanophotonic horizons. Here, we show a resonant metal-semiconductor nanostructure with a static electric field created at the interface between its components by charge carriers generated via femtosecond laser irradiation.

Calcium carbonate nanoparticles tumor delivery for combined chemo-photodynamic therapy: Comparison of local and systemic administration.

The use of nanoparticles (NPs) as delivery vehicles for multiple drugs is an intensively developing area. However, the success of NPs' accumulation in the tumor area for efficient tumor treatment has been recently questioned. Distribution of NPs in a laboratory animal is mainly related to the administration route of NPs and their physicochemical parameters, which significantly affect the delivery efficiency.