Compositional characterisation of metallurgical grade silicon and porous silicon nanosponge particles

Upgraded metallurgical-grade silicon solar cells with efficiency above 20%

Porous Silicon Particles for Imaging and Therapy of Cancer

11 11.1 Introduction The aim of the National Cancer Institute is to eliminate death and suffering from cancer by 2015, by harnessing the power of nanotechnology to provide new tools for diagnosing, imaging and treating cancer. Funded research projects include the design and fabrication of multifunctional nanodevices which promise to change the way we pinpoint cancer and deliver anticancer drugs...

Formation of silicon nanowire packed films from metallurgical-grade silicon powder using a two-step metal-assisted chemical etching method

In this work, we use a two-step metal-assisted chemical etching method to produce films of silicon nanowires shaped in micrograins from metallurgical-grade polycrystalline silicon powder. The first step is an electroless plating process where the powder was dipped for few minutes in an aqueous solution of silver nitrite and hydrofluoric acid to permit Ag plating of the Si micrograins. During th...

Hybrid luminescent/magnetic nanostructured porous silicon particles for biomedical applications.

This work describes a novel process for the fabrication of hybrid nanostructured particles showing intense tunable photoluminescence and a simultaneous ferromagnetic behavior. The fabrication process involves the synthesis of nanostructured porous silicon (NPSi) by chemical anodization of crystalline silicon and subsequent in pore growth of Co nanoparticles by electrochemically-assisted infiltr...

The mechanism of photohydrosilylation on silicon and porous silicon surfaces.

Visible or UV light activates H-terminated Si surfaces because of the presence of a photogenerated hole in a Si-Si back-bond. Enhancing the lifetime of this hole at the surface increases reactivity. On the basis of photodynamics and electron transfer theory, the prevalence of two mechanisms of photoactivation (internal photoemission versus interband photoexcitation followed by electron transfer...