7 results about "Drop casting" patented technology

The invention belongs to the field of bionic electronic materials and application, and discloses a dipeptide amino acid sequence with a piezoelectric effect, a dipeptide piezoelectric fiber film is prepared from the dipeptide amino acid sequence through a drop casting method, a meniscus driving method and an electric field induction meniscus driving method, and the obtained fiber film is assembled into an application example of a piezoelectric generator. The amino acid sequence of the dipeptide with the piezoelectric effect is Fc-L-Phe-L-Phe-OH, in the formula, Fc is a ferrocene benzoic acid group, Phe represents phenylalanine, and L represents the chirality of used amino acid. The dipeptide micron fiber thin film which is large in area and closely arranged is prepared by utilizing a drop casting method, a semilunar driving method and various methods of introducing a regulation and control electric field in a semilunar driving method membrane preparation process. The obtained fiber film is assembled into a piezoelectric generator of a sandwich structure, the piezoelectric output performance of the piezoelectric generator is closely related to the preparation method of the fiber film, and the piezoelectric performance of the dipeptide fiber film can be remarkably improved through an electric field induction meniscus driving method.

This invention discloses a method for fabricating a SERS chip suitable for real-time detection in multiple scenarios, and the SERS chip itself. The method includes the following steps: Step S1, take an appropriate amount of colloidal silver solution and remove excess CTAB by centrifugation twice; Step S2, add a small amount of deionized water and sonicate to redisperse the solution; Step S3, take an appropriate amount of concentrated silver nanoparticle solution and drop it into the substrate groove; Step S4, after vacuum drying, the desired SERS chip is obtained. The SERS chip fabrication process of this invention is simple. The optimized drop casting method combined with a microgroove substrate design that resists the "coffee ring" effect enables uniform and dense deposition of nanoparticles. This process is easy to operate and has good reproducibility, laying a solid foundation for the large-scale and standardized production of high-performance SERS chips.

A method of reducing corrosion, including coating a surface of a substrate with a corrosion inhibitor to form a coated substrate, and contacting the coated substrate with a corrosive medium, wherein the coated substrate in the corrosive medium has an icorr of less than 0.01 μA cm−2. The corrosion inhibitor includes polyvinylidene fluoride (PVDF), and a layered double hydroxide (LDH) having a formula of X2Al, wherein X is Mg or Zn.

Systems and methods for enhancing the stability and efficiency of perovskite materials, and devices incorporating such perovskite materials. A method of making a perovskite layer includes mixing a perovskite solution with a silica shell precursor solution to produce a perovskite-silica precursor solution, and spin casting or drop casting the perovskite-silica precursor solution on a substrate to form a perovskite material or material layer, wherein the perovskite material or material layer includes a plurality of groups of one or more perovskite grains, each of said plurality of groups wrapped in a silica shell. The silica shell precursor solution may have a chemical structure of Rn—Si—(OR)4-n, where “R” is an alkyl, aryl, or organofunctional group, and “OR” is a methoxy, ethoxy, or acetoxy group.

An automated system for the production of composite electrodes, consisting of an ultrasonic suspension preparation unit, a precision drop casting mechanism and a controlled electrochemical three-electrode reactor cell.