公开(公告)号：US11307169B2

公开(公告)日：2022-04-19

申请号：US17287110

申请日：2020-04-28

Applicant: JIANGSU UNIVERSITY

Inventor： Xiliang Zhang ,  Chengxuan Lu ,  Cheng Chen ,  Shengkang Zong ,  Mengyao Ni

IPC: G01N27/333 ,  G01N27/416 ,  G01N1/14 ,  G01N27/30 ,  G01N1/10

Abstract: A pH sensor with automatic water storage and replenishment, including a substrate, a working electrode, a reference electrode, a first piezoelectric micropump, a water storage device, and a second piezoelectric micropump. The working electrode, the reference electrode, the first piezoelectric micropump, the water storage device, and the second piezoelectric micropump are arranged on the substrate. The working electrode and the reference electrode are each connected to a bonding pad through an electrode lead. The second piezoelectric micropump, the water storage device, and the first piezoelectric micropump are sequentially communicated, and a liquid flows to the working electrode via an outlet of the first piezoelectric micropump.

公开(公告)号：US10690615B2

公开(公告)日：2020-06-23

申请号：US16078038

申请日：2016-05-27

Applicant: JIANGSU UNIVERSITY

Inventor： Kun Xu ,  Xiliang Zhang ,  Miaomiao Geng ,  Shoujuan Cui ,  Pingping Li ,  Shiqing Zhang

IPC: B82Y15/00 ,  B82Y5/00 ,  G01N27/30 ,  H01L51/00 ,  B82Y30/00 ,  G01N27/414 ,  G01N27/44

Abstract: 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 (1), a working electrode (4), a reference electrode (5), a copper contact A (6), a copper contact B (7), an inner lead A (8), and an inner lead B (9). A groove A (2) and a groove B (3) are formed in the substrate (1). The working electrode (4) is located in the groove A (2), and the reference electrode (5) is located in the groove B (3). The bottom of the working electrode (4) is connected to the inner lead A (8) by means of the copper contact A (6). The top of the reference electrode (5) is connected to the inner lead B (9) by means of the copper contact B (7). The working electrode (4) comprises a graphene group A (401) and a sensitive electrode material layer (402). The sensitive electrode material layer (402) is located on the upper layer of the graphene group A (401). The reference electrode (5) comprises a graphene group B (501) and a metal material silver layer (502). The metal material silver layer (502) is located on the lower layer of the graphene group B (501). Microgrooves or micro pits are formed in the upper surface of the sensitive electrode material layer (402) and the lower surface of the metal material silver layer (502). 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.

公开(公告)号：US12099029B2

公开(公告)日：2024-09-24

申请号：US18575308

申请日：2021-09-26

Applicant: JIANGSU UNIVERSITY

Inventor： Xiliang Zhang ,  Cheng Chen ,  Tianyu Mao ,  Xiaoqing Su ,  Yalei Zhang

IPC: G01N27/30 ,  B01J16/00 ,  C23F1/38

CPC classification number: G01N27/302 ,  B01J16/00 ,  C23F1/38 ,  G01N27/301

Abstract: A superhydrophilic thick-film pH sensor based on chemical etching, and a preparation method thereof are provided. The superhydrophilic thick-film pH sensor includes: a substrate, and a working electrode and a reference electrode that cover surfaces of the substrate. The working electrode includes a titanium sheet attached to one side of the substrate; a front part of an outer surface of the titanium sheet is covered with a titanium dioxide sensitive layer; an electrically-conductive layer is attached to the other side of the substrate; the reference electrode is located on the electrically-conductive layer, and a surface of the reference electrode is coated with a naphthol layer; and an insulating gel wraps the substrate to expose only the working electrode and the reference electrode. The working electrode is obtained by soaking the titanium sheet in an 80° C. NaOH solution, and is integrated with the reference electrode to produce the thick-film pH sensor.

公开(公告)号：US11150211B2

公开(公告)日：2021-10-19

申请号：US15768185

申请日：2016-05-19

Applicant: Jiangsu University

Inventor： Xiliang Zhang ,  Kun Xu ,  Shoujuan Cui ,  Miaomiao Geng ,  Pingping Li ,  Shiqing Zhang

IPC: G01N27/30 ,  C23C28/00 ,  C23C14/58 ,  C23C14/08 ,  C23C14/18 ,  C23C14/35

Abstract: 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 Sb2O3 layer successively on the first graphene film by magnetron sputtering method, and coating Nafion™ perfluorinated sulfonic acid membrane on the Sb2O3 layer by spin-coating method to fabricate pH working electrode; depositing Ag layer on the second graphene film and dipping in FeCl3 solution 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.