Process for the Production of Hydrogenated Amorphous Silicon-Containing Composite Colloids and for the Encapsulation of Substances with Hydrogenated Amorphous Silicon-Containing Composite Layers, as well as Hydrogenated Amorphous Silicon-Containing Composite Colloids and Substances Encapsulated with Silicon-Containing Composite Layers and Their Use

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This invention describes a method for producing hydrogenated amorphous silicon-containing composite colloids (tiny particles with a silicon-based shell) at low temperatures and ordinary pressure using cavitation, such as ultrasonic sound waves. These colloids can encapsulate or coat various substances, including nanoparticles and drugs, forming a hollow, spherical shell around them. The process allows scalable and mild-condition manufacturing of such nanomaterials, which traditionally require high temperatures or pressures.

Use CasesContent extracted from patent full text and abstract with AI.

• Electrode materials for lithium-ion, sodium-ion, or lithium-sulfur batteries (especially as anode materials with high capacity and stability)
• Drug delivery carriers in nanomedicine, allowing controlled release and protection of therapeutic agents
• Use as fluorescent or magnetic resonance markers for in vitro/in vivo imaging and diagnostics
• Materials for quantum dot LEDs, waveguides, or as light-absorbing or light-scattering layers in photovoltaics or photodetectors
• Catalyst supports or active materials for photocatalytic or environmental (e.g., wastewater treatment) applications
• Coating or encapsulation of nanoparticles to improve their stability, dispersion, or functionality in various industrial or research contexts

BenefitsContent extracted from patent full text and abstract with AI.

• Manufacture is possible at room temperature and atmospheric pressure without need for expensive or complex equipment (no high vacuum or high temperature required).
• Highly versatile: can encapsulate or coat a wide variety of solid, liquid, or gaseous substances, including sensitive drugs, nanoparticles, or additives.
• The resulting colloids are hollow, spherical, and covered with functional hydrogenated amorphous silicon or silicon-composite shells, offering unique chemical and physical properties.
• Greatly improved surface functionalization options due to silicon-hydrogen terminations and non-oxidized states of surface.
• High porosity and stability make the material particularly suited for battery anodes with high capacity and cycling stability.
• The process is scalable, and colloids are suitable for various applications from electronics and batteries to biomedicine without post-processing steps.

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Patent Abstract

The invention relates to a method for producing hydrogenated amorphous silicon-containing composite colloids and for encapsulating substances with hydrogenated amorphous silicon-containing composite layers, and to silicon-containing composite colloids and substances encapsulated with silicon-containing composite layers, and to the use thereof. According to the invention a hydridosilane, or a hydridosilane derivative, or a mixture of various hydridosilanes and/or hydridosilane derivatives, which are dissolved in at least one organic and/or inorganic solvent, or at least one hydridosilane, or a hydridosilane derivative, or a mixture of various hydridosilanes and/or hydridosilane derivatives, which, without a solvent are already in liquid form, is subjected to cavitation. Hydrogenated amorphous silicon-containing composite colloids are thus produced.