Abstract:
Disclosed are a nucleic acid functionalized metal nanoprobe and a preparation method therefor; according to the probe, metal cations with desirable biocompatibility are mixed with exogenous deoxyribonucleic acid (DNA) or ribonucleic acid (RNA) molecules to generate a DNA or RNA composite nanostructure; co-incubating is performed with a pathogenic microorganism, the composite nanostructure enters pathogenic microorganism cells through electrostatic adsorption, and unique microenvironment of high-level oxidizing and reducing substances possessed by the pathogenic microorganism is used to promote in-situ synthesis of the intelligent biological probe; accurate targeted labeling and real-time rapid detection of the pathogenic microorganism are achieved, and the probe is used for targeted intervention of infectious diseases such as lung infection, intestinal infection and influenza; combined with physical interventions such as photoelectricity, magnetocaloric effect, near infrared, multi-modal real-time dynamic and high-specificity rapid and accurate tracing and accurate killing of related lesions can be achieved.
Abstract:
Disclosed herein are second near-infrared (NIR-II) fluorescent composite and its production method. The method mainly includes the steps of, mixing a gold nanocluster having a plurality of a thiol-based compound on its outer surface and alpha-glycerylphosphorylcholine (alpha-GPC) in a solvent to form a mixture; replacing the solvent with an inert gas; and heating the mixture at a temperature about 100-200° C. in the presence of the inert gas until at least a portion of the gold nanocluster is encapsulated by a capping layer consisting of alpha-GPC, thereby producing the NIR-II fluorescent composite. The thus-produced NIR-II fluorescent composite is characterized by having an emission wavelength covering NIR-II region detectable by specialized camera. Also encompassed in the present disclosure is a method for conducting in vivo bioimaging of a target area in a subject. The method includes administering the present NIR-II fluorescent composite to the target area; and detecting the fluorescence emitted therefrom at a wavelength between 900 to 1700 nm.
Abstract:
A semiconductor nanocrystal include a first semiconductor material and have a luminescence quantum yield of at least 10%, at least 20%, or at least 30%. The nanocrystal can be substantially free of toxic elements. Populations of the nanocrystals can have an emission FWHM of no greater than 0.35 eV.
Abstract:
The present invention relates to the use of nanosystems as non deactivable security markers comprising metal atomic quantum clusters (AQCs) of at least two different size distributions encapsulated in a cavity with an inner diameter less than or equal to approximately 10 nm. These nanosystems are luminescence, particularly fluorescence after external excitation. The invention also relates to security documents, articles or elements incorporating these markers as well as to a method and a system for detecting the same.
Abstract:
A series of multicoordinating and multifunctional ligands optimized for the surface-functionalization of luminescent quantum dots (QDs) and gold nanoparticles (AuNPs) alike is disclosed. An L-aspartic acid precursor is modified with functionality, through simple peptide coupling chemistry, one or two lipoic acid (LA) groups and poly(ethylene glycol) (PEG) moieties in the same ligand. These ligands were combined with a new photoligation strategy to yield hydrophilic and reactive QDs that are colloidally stable over a broad range of conditions, including storage at nanomolar concentration and under ambient conditions.
Abstract:
The present invention discloses stable, non-agglomerated, ultra-small metal/alloy clusters encapsulated in silica with the metal/alloy cluster size of less than 5 nm. The invention further discloses a simple, cost effective process for the preparation of metal/alloy clusters encapsulated in silica which is thermally stable and without agglomeration.
Abstract:
The present invention relates to nanocompounds comprising a charge-transfer complex of at least two different size metal atomic quantum clusters (AQCs) and the use thereof as luminescent nanocompounds, particularly for the use thereof as fluorescent nanocompounds; as well as the method for obtaining and detecting them.
Abstract:
A method for preparing an inorganic nano-material is provided. The method includes steps of providing a first solution including plural metal ions; mixing the first solution with a surfactant and adding a reduction agent to generate a second solution, wherein the second solution generates plural metal atoms reduced from the plural metal ions; and adding an oxidation agent into the second solution for oxidizing the plural metal atoms so as to generate plural metal oxides and form the inorganic nano-material.
Abstract:
The present invention relates to nanosystems comprising metal atomic quantum clusters (AQCs) of at least two different sizes encapsulated in a cavity with an inner diameter less than or equal to 10 nm for the use thereof as luminescent nanosystems, particularly for the use thereof as fluorescent nanosystems; as well as the method for obtaining and detecting them. The invention also relates to the use of said luminescent nanosystems as a fluorescent probe, biomarker or contrasting agent.
Abstract:
The present invention provides a silver ion-containing faujasite type zeolite which is a photoluminescent material that emits a visible light by irradiation of ultraviolet ray.