Jiangsu University

Kun Xu

Zhaoyang Zhang

Hao Zhu

Yucheng Wu

Xueren Dai

Sheng Guo

Xiliang Zhang

Pingping Li

Miaomiao Geng

Shiqing Zhang

Qinming Gu

Anbin Wang

Douyan Zhao

Shoujuan Cui

Shuai Yang

Hong Wang

Zhi Zhang

Zhihao Leng

Yang Liu

Wenrong Shen

Panzhou Li

Senshan Mao

Wenhui Liang

Shuaijie Zhu

Yangfan Tang

A method used to repair a workpiece through a combination of laser and an electrochemical reaction is provided. A tool anode is arranged on the back side of the workpiece and is spaced therefrom. A laser beam is focused on an outer surface of the workpiece to realize localized repairing on the back side. The method realizes localized coating repairing on the back side of the workpiece through coordination between the thermal effect of the laser and the electrochemical deposition based on the characteristic of high thermal conductivity of the workpiece. The electrodeposition reaction does not occur in regions that do not need to be repaired. The operating process is simple, the cost of the plating solution is largely reduced, and the problem that the coating on the inner wall of the thin-walled workpiece is difficult to repair due to stripping is solved.

Method and device for induced localized electrodeposition on back side of thin-walled workpiece through laser irradiation

The present invention discloses a method and a device for laser-assisted electrochemical composite deposition using a rifling-type hollow rotating electrode, which relate to the field of micro-composite processing in special processing technologies. A center of a laser beam is allowed to pass through a rifling-type hollow rotating electrode and focus onto a cathode substrate. When the rifling-type hollow rotating electrode is rotated at a constant speed, an electrodeposition solution rotates in the rifling-type hollow rotating electrode and generates a certain centripetal force to improve the precision and localization of deposition. During the process of the present invention, an internal rifling structure of the electrode is rotated at a high speed so that the deposition solution generates a centripetal force. The internal rifling structure and an external helical structure of the rifling-type hollow rotating electrode make the deposition solution move upward to form a 'self-circulation' system.

Method and device for laser-assisted electrochemical composite deposition using rifling-type hollow rotating electrode

A device for insulating a cathode surface in electrochemical machining is provided. The cathode surface insulation device is characterized in that super-hydrophobic micro-structures are prepared in regions to be insulated on the cathode surface, so as to realize selective insulation of the surface of the tool cathode, and thereby achieve objects of constraining an electrical field in the processing area, reducing stray corrosion and side surface taper, and improving processing efficiency and accuracy.

Device for insulating cathode surface in electrochemical machining

Disclosed are a device and a method for microelectrodeposition through a laser assisted flexible following tool electrode. Localization of electrodeposition and dimensional precision of members are enhanced by using the flexible following tool electrode to restrict a dispersion region of an electric field and a reaction region of electrodeposition, and a complex-shaped member can be deposited by controlling a motion path of the flexible following tool electrode. Since a laser has a high power density, introducing laser irradiation changes an electrode state in a radiated region, accelerates ion diffusion and electron transfer speeds, and increases a deposition rate, thus reducing defects such as pitting and cracking in a deposit, enhancing deposition quality, and achieving fabrication of a micro-part by a synergistic action of both electrochemical energy and laser energy.

Device for microelectrodeposition through laser assisted flexible following tool electrode and deposition method using the device thereof

An apparatus for micromachining a semiconductor material from opposing sides through synchronous coordination of laser and electrochemistry includes an optical path system, a stable low-pressure jet generation system, and an electrolytic machining system. The optical path system includes a laser generator, a beam expander, a reflector, a galvanometer, and a lens. The electrolytic machining system includes a direct-current pulsed power supply, an adjustable cathode fixture, an electrolyte tank, a current probe, and an oscilloscope. The stable low-pressure jet generation system provides an electrolyte flow into a metal needle. The electrolyte flow forms an electrolyte layer between a semiconductor material and a cathode copper plate, such that the cathode and the anode are in electrical contact with each other. In a method employing the apparatus, a laser beam is irradiated onto the semiconductor material to form a local high-temperature region, which leads to a localized increase in electrical conductivity.

Method and apparatus for micromachining semiconductor material from opposing sides through synchronous coordination of laser and electrochemistry

Provided is a fabrication method for a composite planar pH sensor modified by graphene film including: slotting into substrate, setting copper foil on both sides, and setting leads on the copper foil; coating graphene film on the copper foils using micro mechanical stripping method to form the first graphene film and the second graphene film; depositing Sb layer and SbOlayer successively on the first graphene film by magnetron sputtering method, and coating Nafion&#x2122; perfluorinated sulfonic acid membrane on the SbOlayer by spin-coating method to fabricate pH working electrode; depositing Ag layer on the second graphene film and dipping in FeClsolution to form AgCl layer; coating the third graphene film on the AgCl layer to fabricate reference electrode. The composite planar pH sensor modified by graphene film may be used in pH measurement for solid, semisolid, mash and solution samples.

Method for preparing graphene modified composite planar pH sensor

A micro-nano textured graphene-based bionic pH sensor and a preparation method therefor. The micro-nano textured graphene-based bionic pH sensor comprises a substrate (), a working electrode (), a reference electrode (), a copper contact A (), a copper contact B (), an inner lead A (), and an inner lead B (). A groove A () and a groove B () are formed in the substrate (). The working electrode () is located in the groove A (), and the reference electrode () is located in the groove B (). The bottom of the working electrode () is connected to the inner lead A () by means of the copper contact A (). The top of the reference electrode () is connected to the inner lead B () by means of the copper contact B (). The working electrode () comprises a graphene group A () and a sensitive electrode material layer (). The sensitive electrode material layer () is located on the upper layer of the graphene group A (). The reference electrode () comprises a graphene group B () and a metal material silver layer (). The metal material silver layer () is located on the lower layer of the graphene group B (). Microgrooves or micro pits are formed in the upper surface of the sensitive electrode material layer () and the lower surface of the metal material silver layer (). The pH sensor can fast adsorb water in soil and a culture medium and then adsorb hydrogen ions, and pH in-situ measurement of the soil, the culture medium and other heterogeneous systems is implemented.

Micro-nano textured graphene-based bionic pH sensor and preparation method therefor

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Jiangsu, China

Kun Xu