COMPOSITE DIAMOND COATING AND PREPARATION METHOD THEREFOR, MICROFLUIDIC CHANNEL AND MICROFLUIDIC DEVICE

摘要

Disclosed are a composite diamond coating and a preparation method therefor, a microfluidic channel and a microfluidic device, relating to the technical field of coatings. The composite diamond coating comprises an intermediate layer and diamond coatings formed on the surfaces of the intermediate layer, wherein the nucleation density of the diamond coating changes in gradient, and at least part of the surface of the composite diamond coating is hydrophilic and part of the surface is hydrophobic. By compositing the intermediate layer and the diamond coating, the gradient changes in the structure and the chemical ingredients of the composite diamond coating can be achieved, and under the combined action of the two gradient changes and the surface hydrophilcity and hydrophobicity, the surface wettability of the composite diamond coating can be effectively controlled, so as to achieve the purpose of effectively driving and controlling the microfluids in contact with same. In addition, the composite diamond coating can be surface functionalized and also has a good chemical stability and repeatability. Also provided is a method for preparing the composite diamond coating. The method has a simple process and convenient operation.