38 results about "Platinum nanoclusters" patented technology

Provided are a catalyst that includes heterogeneous metal carbide nanomaterials and a novel preparation method to synthesize the metal carbide nanomaterials under relatively mild conditions to form anencapsulated transition metal and / or transition metal carbide nanoclusters in a support and / or binder. The catalyst may include confined platinum carbide nanoclusters. The preparation may include thetreatment of encapsulated platinum nanoclusters with ethane at elevated temperatures. The catalysts may be used for catalytic hydrocarbon conversions, which include but are not limited to, ethane aromatization, and for selective hydrogenation, with negligible green oil production.

A catalyst that includes heterogeneous metal carbide nanomaterials and a novel preparation method to synthesize the metal carbide nanomaterials under relatively mild conditions to form an encapsulatedtransition metal and / or transition metal carbide nanoclusters in a support and / or binder. The catalyst may include confined platinum carbide nanoclusters. The preparation may include the treatment ofencapsulated platinum nanoclusters with ethane at elevated temperatures. The catalysts may be used for catalytic hydrocarbon conversions, which include but are not limited to, ethane aromatization, and for selective hydrogenation, with negligible green oil production.

A method for displaying fingerprints by fluorescent magnetism precious metal nano-cluster nuclear shell microspheres is characterized in that fluorescent magnetism precious metal nano-clusters directly incubate gold, silver or platinum nano-clusters on the surfaces of magnetism ferroferric oxide nano particles modified by polymine to form gold, silver or platinum nano-cluster nuclear shell microspheres, that is gold, silver or platinum nano-cluster display reagents. The method for displaying the fingerprints by the fluorescent magnetism precious metal nano-cluster nuclear shell microspheres has the beneficial technical effects that the fluorescent magnetism precious metal nano-cluster nuclear shell microspheres are high in fluorescence quantum yield, long in fluorescence duration and low in toxicity; fingerprint display operation is fast and efficient, and 30-day-old fingerprints can be clearly displayed; performance of displaying old fingerprints of the prepared fluorescent magnetism precious metal nano-cluster nuclear shell microspheres are better than performance of traditional display reagents; and a constructed display observation system can highly fix fingerprint information, and is beneficial to inspection and identification, and the like.

The invention discloses a preparation method of platinum nanoclusters and application of the platinum nanoclusters in tumor imaging agents and apoptosis agents. The preparation method comprises the following specific steps of: mixing a platinum salt solution and ascorbic acid (VC) and reduced glutathione (GSH), and heating in a water bath, wherein the synthesis speed and the particle size of the platinum nanoclusters are controlled by adjusting the pH and temperature of a solution and a ratio of components. The prepared platinum nanoclusters have a small particle size, good permeability, and excellent biocompatibility and stable fluorescence characteristics, can be used for high spatial and temporal resolution imaging on tumors and other lesion sites, and can effectively promote tumor cell apoptosis and tumor tissue ablation; the method and the application are simple and easy to implement, the toxicity is low, the sensitivity is high, the multi-mode real-time dynamic monitoring can be carried out, and the medical clinical application value and prospect are broad.

A caged platinum nanocluster complex is disclosed. The complex comprises (a) an amine-terminated dendrimer; and (b) a platinum nanocluster comprising platinum oxides, the platinum nanocluster being confined inside of the amine-terminated dendrimer. The complex exhibits cytotoxicity to cancer cells. A double-caged platinum nanocluster complex is also disclosed, which comprises polyethylene glycol (PEG) coated on the surface of a dendrimer caged platinum nanocluster complex. The double-caged caged platinum nanocluster complex comprises pH-sensitive bonds on the surface thereof. Also disclosed are methods of preparing and using the same.

The invention provides a sericin-wrapped blue-luminescent platinum nano-cluster and a preparation method and application thereof. The preparation method of the present invention is to mix the sericin protein and the high-priced platinum complex in a certain ratio, and after fully mixing with a vortex, add NaOH to adjust the pH value, and mix again with a vortex. Water bath for several hours to obtain a polymer of platinum nanoclusters. The preparation method of the present invention is simple in process, green, efficient, high in feasibility, and has extensive and practical application value. The nanocluster of the present invention can be applied to the detection of pyrithione in substances, and the application scope includes environmental water samples, soil samples, and fruit and vegetable samples; it can also be applied to the detection of chloramphenicol content in samples. The detection method of the invention is simple and efficient, has strong specificity and high sensitivity, and also provides a new idea for the use of sericin.

An application of a silver and platinum nano-cluster in tumor targeted imaging comprises the steps of: establishing a nude mouse tumor model; locally injecting an ultrasonically dispersed silver or platinum nano-cluster into a nude mouse, or directly injecting a silver or platinum containing solution of 0.1 to 100 μmol / L into a nude mouse; and in 24 hours after injection, performing medical imaging on the tumor part of the nude mouse by using a medical imaging method, and performing qualitative and quantitative analysis on the imaging result.

The invention belongs to the technical field of new materials, and especially relates to a preparation method and an application of fluorescent platinum nanoclusters for optical imaging of blood system suspension cells. The preparation method comprises the following steps: achieving cooperation of a platinum ion precursor aqueous solution and an amine polymer; performing full complexing by an amine group; adding a reducing agent at a high temperature to airtightly stir; preparing a crude product of the fluorescent platinum nanoclusters; and finally obtaining a water-soluble fluorescent platinum nanocluster after ultracentrifugation and dialysis A prepared fluorescent platinum nanocluster with an ultra-small size can be applied to the optical imaging of the blood system suspension cells. The invention provides the preparation method of the platinum nanoclusters which has the characteristics of simple operation, environmental protection, and excellent fluorescence performance. An adherent cell system can be calibrated; and the preparation method extends the platinum nanoclusters as fluorescent markers for the first time into the optical imaging of the blood system suspension cells, and is of great significance for early identification and diagnosis of blood system diseases.

The invention pertains to the technical field of nanometer material preparation and in particular relates to a zirconium dioxide nanometer film with platinum nanocluster and a preparation method and applications thereof. The invention adopts zirconium tetrabutoxide and magnesium ethylate as reaction materials and the nanometer film is formed by a layer by layer formation through a surface sol-gel reaction; the zirconium dioxide film with platinum ion is obtained through acid and alkali treatments and ion exchange. The zirconium dioxide nanometer film with platinum nanometer grain is obtained through a treatment by low temperature hydrogen plasma to the zirconium dioxide film. The size and size distribution of the nanometer grain and the thickness of the film can be designed and controlled by the method of the invention and the product can be used for coating a plane and a curved surface; the low temperature plasma adopted prevents loss of platinum component and damage to the film; the obtained zirconium dioxide nanometer film with platinum nanometer grain is of nanometer crystal film and the platinum nanometer grain shows good thermal stability at high temperature. The technology of the invention can be used for preparing resource-saving high effective coating of vehicle exhaust gas catalytic converter and indoor coating which can catalytically degrade contamination.