2results about How to "Meet Response Needs" patented technology

The invention discloses a method for preparing a single-layer tungsten diselenide nanoband based on a space confinement strategy. By changing the flow and the growth time of hydrogen, effective control on the width and the thickness of a nanoband can be realized. The method comprises the following steps: uniformly spraying tungsten trioxide powder to one substrate, then covering the substrate by the other substrate, and forming micro reaction space which is of a 'sandwich'-like structure. Growth of a tungsten diselenide nanoband is carried out by utilizing a constant-pressure chemical vapor deposition method; physicochemical characteristics of a one-dimensional transition metal chalcogenide strongly depend on suspension key types on the edge of the one-dimensional transition metal chalcogenide, metallic properties are displayed by an ultranarrow band, and conversion from the metallic properties to semiconductor properties can be displayed from the edge to the center of a wider band; the tungsten diselenide nanoband is widely applied to micro-nano photoelectric devices due to the special property; industrial production of the tungsten diselenide nanoband can be realized through an experimental method of the invention.

The invention discloses an amino acid-based aggregate as well as a preparation method and application thereof. The amino acid modified by at least two hydrophobic groups is added into water, the pH value is adjusted to dissolve the amino acid, and then the pH value is adjusted to a specific value to obtain the amino acid-based aggregate. The obtained amino acid-based aggregate can replace an existing peptide aggregate, the cost of drug delivery is reduced, in addition, a series of amino acid-based aggregates of pH windows are obtained by changing modification groups and modification positions, and the pH response requirements of various application scenes are met.